path: root/ChangeLog

2010-01-08  Eric Blake  <ebb9@byu.net>

	Address remaining 'make syntax-check' findings.
	* gnulib: Update to latest.
	* Makefile.am (tests/package.m4): Avoid @@ substitution.
	(src_m4_LDADD): Link with libiconv.
	* m4/m4private.h (STREQ): New macro.
	* m4/resyntax.c (m4_regexp_syntax_encode): Use it.
	* src/main.c (process_file): Likewise.
	(includes): Drop unused header.
	* m4/macro.c (m4_arg_equal): Adjust comment.
	* m4/syntax.c: Likewise.
	* m4/system_.h: Avoid useless preprocessor parenthesis.
	* ltdl/m4/stackovf.m4 (M4_SYS_STACKOVF): Likewise.
	* src/stackovf.c: Likewise.
	(setup_stackovf_trap): Mark diagnostics.
	* modules/mpeval.c (includes): Move quotearg.h inclusion...
	* modules/evalparse.c (includes): ...to where it is used.
	* cfg.mk (local-checks-to-skip): Exempt tests that cause spurious
	failures, but first fix what they were intended to detect.
	(_makefile_at_at_check_exceptions): Allow an exception.

2010-01-07  Eric Blake  <ebb9@byu.net>

	Use correct license on auxiliary documentation.
	* gnulib: Update to latest.
	* AUTHORS: Use GFDL 1.3, not 1.2.
	* README-alpha: Likewise.
	* README: Likewise.
	* THANKS: Likewise.
	* doc/STYLE: Likewise.
	* modules/README: Likewise.
	* NEWS: Place under GFDL.
	* TODO: Likewise.
	* cfg.mk (old_NEWS_hash): Update.

	Address 'make sc_error_message_uppercase' failures.
	* m4/output.c (m4_freeze_diversions): Silence false positive.
	* src/main.c (main): Use 'warning', not 'Warning', in messages.
	* m4/utility.c (m4_verror_at_line): Likewise.
	* doc/m4.texinfo (Operation modes, Macro Arguments, Undefine)
	(Defn, Pushdef, Indir, Builtin, Ifdef, Ifelse, Dumpdef, Trace)
	(Debuglen, Debugfile, Dnl, Changeresyntax, Standard Modules)
	(Index macro, Regexp, Substr, Translit, Patsubst, Format, Incr)
	(Eval, Mkstemp, Syncoutput, Improved forloop)
	(Improved fatal_error): Adjust expected output.
	* tests/builtins.at (define, mkdtemp, mkstemp): Likewise.
	* tests/freeze.at (loading format 1, reloading unknown builtin):
	Likewise.
	* tests/macros.at (Arity and defn, 'Arity, defn, and freeze')
	(pushdef/popdef): Likewise.
	* tests/null.err: Likewise.
	* tests/options.at (deprecated options, POSIXLY_CORRECT)
	(--fatal-warnings, --regexp-syntax, --syncoutput): Likewise.
	* tests/others.at (nul character, stdin seekable): Likewise.
	* tests/modules.at (AT_CHECK_M4_MODTEST, modules: text):
	Likewise.

	Address 'make sc_cast_of_argument_to_free' failures.
	* m4/m4private.h (DELETE): Adjust comment and fix parentheses.
	* m4/m4.c (m4_delete): Use it to avoid warning.
	* m4/module.c (install_builtin_table, module_remove): Likewise.
	* m4/symtab.c (m4_symbol_value_delete, m4_symbol_value_copy):
	Likewise.
	* .x-sc_cast_of_argument_to_free: New file.
	* Makefile.am (syntax_check_exceptions): Distribute exceptions.

	More whitespace cleanup.
	* HACKING: Nuke trailing whitespace.
	* examples/WWW/Makefile: Likewise.
	* examples/WWW/_footer.htm: Likewise.
	* examples/WWW/_header.htm: Likewise.
	* examples/WWW/m4lib/bugs.m4: Likewise.
	* examples/WWW/m4lib/html.m4: Likewise.
	* examples/WWW/m4lib/menu.m4: Likewise.
	* examples/WWW/m4lib/visions.m4: Likewise.
	* examples/esyscmd.m4: Likewise.
	* examples/fstab.m4: Avoid space-tab.
	* examples/patsubst.m4: Likewise.
	* NEWS: Prefer space over tab for alignment.
	* THANKS: Likewise.
	* TODO: Likewise.
	* bootstrap: Likewise.
	* configure.ac: Likewise.
	* ltdl/m4/stackovf.m4: Likewise.
	* m4/hash.c: Likewise.
	* m4/hash.h: Likewise.
	* m4/input.c: Likewise.
	* m4/m4.c: Likewise.
	* m4/m4module.h: Likewise.
	* m4/m4private.h: Likewise.
	* m4/macro.c: Likewise.
	* m4/module.c: Likewise.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* m4/resyntax.c: Likewise.
	* m4/symtab.c: Likewise.
	* m4/syntax.c: Likewise.
	* m4/system_.h: Likewise.
	* modules/evalparse.c: Likewise.
	* modules/format.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/import.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/m4.h: Likewise.
	* modules/modtest.c: Likewise.
	* modules/mpeval.c: Likewise.
	* modules/perl.c: Likewise.
	* modules/shadow.c: Likewise.
	* modules/stdlib.c: Likewise.
	* modules/time.c: Likewise.
	* modules/traditional.c: Likewise.
	* src/freeze.c: Likewise.
	* src/main.c: Likewise.
	* src/stackovf.c: Likewise.
	* tests/stackovf.test: Likewise.
	* doc/STYLE: Mention the change.

2010-01-05  Eric Blake  <ebb9@byu.net>

	Document new indentation policy.
	* HACKING: Document indentation policy.
	* .x-sc_prohibit_tab_based_indentation: New file.
	* cfg.mk (sc_prohibit_tab_based_indentation): New rule.
	* Makefile.am (syntax_check_exceptions): Ship exception.

	Switch to indentation by space, not tab.
	* .gitmodules: Convert leading tabs to spaces.
	* TODO: Likewise.
	* bootstrap: Likewise.
	* configure.ac: Likewise.
	* examples/WWW/m4lib/html.m4: Likewise.
	* examples/WWW/m4lib/layout.m4: Likewise.
	* examples/WWW/m4lib/menu.m4: Likewise.
	* ltdl/m4/debug.m4: Likewise.
	* ltdl/m4/gmp.m4: Likewise.
	* ltdl/m4/m4-obstack.m4: Likewise.
	* ltdl/m4/stackovf.m4: Likewise.
	* m4/builtin.c: Likewise.
	* m4/debug.c: Likewise.
	* m4/hash.c: Likewise.
	* m4/hash.h: Likewise.
	* m4/input.c: Likewise.
	* m4/m4.c: Likewise.
	* m4/m4module.h: Likewise.
	* m4/m4private.h: Likewise.
	* m4/macro.c: Likewise.
	* m4/module.c: Likewise.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* m4/resyntax.c: Likewise.
	* m4/symtab.c: Likewise.
	* m4/syntax.c: Likewise.
	* m4/utility.c: Likewise.
	* modules/evalparse.c: Likewise.
	* modules/format.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/m4.h: Likewise.
	* modules/mpeval.c: Likewise.
	* modules/perl.c: Likewise.
	* modules/stdlib.c: Likewise.
	* modules/time.c: Likewise.
	* src/freeze.c: Likewise.
	* src/m4.h: Likewise.
	* src/main.c: Likewise.
	* src/stackovf.c: Likewise.
	* tests/builtins.at: Likewise.
	* tests/freeze.at: Likewise.
	* tests/generate.awk: Likewise.
	* tests/modules.at: Likewise.
	* tests/others.at: Likewise.
	* tests/stackovf.test: Likewise.
	* tests/testsuite.at: Likewise.

	Update copyright year.
	All files impacted, via 'make update-copyright'.  Additionally:
	* .gitignore: Ignore backup files.

	Prepare to bulk update copyright year.
	* gnulib: Update.
	* ltdl/m4/gnulib-cache.m4: Import update-copyright module.
	* cfg.mk (update-copyright-env): Enforce longhand behavior.
	* .x-update-copyright: New file.
	* Makefile.am (syntax_check_exceptions): Distribute exception.
	* ltdl/m4/debug.m4: Add FSF copyright.
	* ltdl/m4/m4-error.m4: Fix FSF name in copyright.
	* ltdl/m4/m4-getopt.m4: Likewise.
	* ltdl/m4/m4-gettext.m4: Likewise.
	* ltdl/m4/m4-obstack.m4: Likewise.
	* ltdl/m4/m4-regex.m4: Likewise.
	* ltdl/m4/m4-rename.m4: Likewise.
	* ltdl/m4/m4-syscmd.m4: Likewise.
	* modules/modtest.m4: Likewise.
	* modules/perl.m4: Likewise.
	* modules/shadow.m4: Likewise.
	* modules/stdlib.m4: Likewise.
	* modules/time.m4: Likewise.
	* modules/time2.m4: Likewise.
	* tests/iso8859.m4: Likewise.

	Use gnulib maintainer-makefile module.
	* ltdl/m4/gnulib-cache.m4: Import maintainer-makefile module.
	* cfg.mk (local-checks-to-skip): Drop changelog-check; add
	sc_cast_of_x_alloc_return_value.
	(gnu_ftp_host-alpha, gnu_ftp_host-beta, gnu_ftp_host-major)
	(gnu_rel_host): Delete; provided by maint.mk.
	(old_NEWS_hash): New macro.
	* .prev-version: New file.
	* .x-sc_require_config_h: Likewise.
	* .x-sc_require_config_h_first: Likewise.
	* Makefile.am (syntax_check_exceptions, EXTRA_DIST): Ship new
	files.
	* maint.mk: Remove from version control; use gnulib instead.
	* .gitignore: Update.

	Update to latest gnulib.
	* gnulib: Update.
	* ltdl/m4/gnulib-cache.m4: Import xoset.
	* m4/output.c (includes): Ensure that gnulib oset usage will
	call xalloc_die on memory failure.
	* Makefile.am (src/getopt.h): Update snippet from gnulib.
	(LINK_WARNING_H, ARG_NONNULL_H): New macros.

	Fix testsuite failure on newer glibc.
	* tests/testsuite.at (AT_CHECK_M4): Tolerate alternate getopt
	spellings.
	* tests/options.at (deprecated options, unknown option)
	(--debugmode): Adjust expected output accordingly.
	Reported by Ralf Wildenhues.

2009-11-26  Eric Blake  <ebb9@byu.net>

	Update to newer gnulib.
	* gnulib: Update.
	* ltdl/m4/gnulib-cache.m4: Import inttypes, setenv, and unsetenv
	modules.
	* modules/m4.c (m4_make_temp): Adjust gen_tempname client.
	* bootstrap (src_modules): Pick up getopt-gnu and its
	dependencies.
	* configure.ac (gl_VERSION_ETC): Support ./configure
	--with-packager.
	(AC_CHECK_FUNCS_ONCE): Rely on gnulib for setenv, unsetenv.
	* ltdl/m4/m4-getopt.m4: Rewrite to match current gnulib.
	* Makefile.am (src/getopt.h): Likewise.
	* modules/stdlib.c (setenv, unsetenv): Rely on gnulib.

2009-08-24  Eric Blake  <ebb9@byu.net>

	Pick up gnulib fixes for sub-process execution.
	* gnulib: Update.
	* tests/others.at (stdin and stdout closed): New test, to avoid
	regression introduced on 1.4 branch on 2008-07-17.
	* NEWS: Document the change.

	A status of 127 does not always imply esyscmd failure.
	* modules/gnu.c (esyscmd): Silence gnulib message; regression
	introduced 2009-03-13.
	* doc/m4.texinfo (Sysval): Test this.
	* NEWS: Document the change.

2009-06-26  Eric Blake  <ebb9@byu.net>

	Use bitrotate for hashing.
	* gnulib: Update to latest.
	* ltdl/m4/gnulib-cache.m4: Import bitrotate module.
	* m4/hash.c (m4_hash_string_hash): Use it.

	Fix description of limits on diversions.
	* doc/m4.texinfo (Diversions): Fix grammar.  Be less pessimistic
	about limitations.
	* THANKS: Update.
	Reported by Elias Benali.

2009-06-17  Eric Blake  <ebb9@byu.net>

	Stress test for hash resizing.
	* tests/builtins.at (define): Enhance test.

2009-06-15  Eric Blake  <ebb9@byu.net>

	Document why bootstrap might touch state of tree.
	* bootstrap: Fix typos.  Add comment.
	* HACKING: Add notes about this scenario.
	* gnulib: Update to latest version.
	* .gitignore: Track gnulib changes.

	Drop .cvsignore and redundant .gitignore files.
	* .cvsignore: Delete.  We are moving further away from CVS.
	* build-aux/.cvsignore: Likewise.
	* doc/.cvsignore: Likewise.
	* examples/.cvsignore: Likewise.
	* ltdl/.cvsignore: Likewise.
	* m4/.cvsignore: Likewise.
	* modules/.cvsignore: Likewise.
	* po/.cvsignore: Likewise.
	* src/.cvsignore: Likewise.
	* tests/.cvsignore: Likewise.
	* .gitignore: Consolidate from other files.
	* build-aux/.gitignore: Delete, now that it is consolidated.
	* doc/.gitignore: Likewise.
	* examples/.gitignore: Likewise.
	* ltdl/.gitignore: Likewise.
	* m4/.gitignore: Likewise.
	* modules/.gitignore: Likewise.
	* po/.gitignore: Likewise.
	* src/.gitignore: Likewise.
	* tests/.gitignore: Likewise.
	* bootstrap: Simplify accordingly.  Sync gnulib tree prior to
	libtoolize, to avoid libtool overwriting config.guess.

	Avoid compiler warning.
	* m4/macro.c (process_macro): Use correct type for isdigit.

2009-06-13  Eric Blake  <ebb9@byu.net>

	Avoid snprintf link failures.
	* ltdl/m4/gnulib-cache.m4: Import snprintf-posix module.
	Reported by Ralf Wildenhues.

2009-06-12  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	Avoid pointer arithmetic on `void *'.
	* modules/m4.c (dump_symbol_CB): Cast obstack_base return value
	to `char *' before using it.

2009-05-04  Eric Blake  <ebb9@byu.net>

	Silence verbose testsuite runs.
	* tests/testsuite.at (m4_version_prereq): Bump to recent
	autoconf.git version where stdout-nolog was added.
	* tests/builtins.at (esyscmd, syscmd): Use new stdout-nolog.
	* tests/freeze.at (AT_TEST_FREEZE): Likewise.
	* tests/others.at (stderr closed): Likewise.
	* HACKING: Mention new requirement.
	* bootstrap: Likewise.
	Reported by Ralf Wildenhues.

2009-04-21  Eric Blake  <ebb9@byu.net>

	Be more explicit about default quoting characters.
	* doc/m4.texinfo (Quoted strings): Call out characters by name.
	* THANKS: Update.
	Suggested by Mehul Sanghvi.

2009-04-16  Eric Blake  <ebb9@byu.net>

	Use gnulib rename module.
	* ltdl/m4/gnulib-cache.m4: Import rename module.  At the moment,
	we don't tickle either of the platform bugs that it fixes, but it
	is better to be safe than sorry.

	Require newer automake features.
	* configure.ac (AM_INIT_AUTOMAKE): Add dist-xz, color-tests,
	parallel-tests, and silent-rules.  Drop dist-lzma.
	* HACKING: Update minimum requirements.
	* gnulib: Update to latest version.

	Mention release of 1.4.13.
	* NEWS: Update to match release on branch-1.4.
	* doc/m4.texinfo (History): Update release history.
	(copying): Finish conversion to GFDL 1.3, started 2008-11-04.

2009-03-23  Eric Blake  <ebb9@byu.net>

	Exploit git submodule by adding appropriate symlinks.
	* bootstrap: No longer copy files from gnulib.
	* COPYING: Change to symlink pointing into gnulib.
	* INSTALL: Likewise.
	* build-aux/compile: Likewise.
	* build-aux/config.guess: Likewise.
	* build-aux/config.sub: Likewise.
	* build-aux/depcomp: Likewise.
	* build-aux/install-sh: Likewise.
	* build-aux/mdate-sh: Likewise.
	* build-aux/missing: Likewise.
	* build-aux/texinfo.tex: Likewise.
	* .cvsignore: Reflect these changes.
	* .gitignore: Likewise.
	* build-aux/.cvsignore: New file.
	* build-aux/.gitignore: Likewise.

	Make gnulib a git submodule.
	* .gitmodules: New file.
	* gnulib: Record which version of gnulib has been tested.
	* bootstrap: Aid in submodule usage.
	* cfg.mk (gnulib_dir): Alter default location of gnulib.
	* HACKING: Mention how to use submodule.

2009-03-21  Eric Blake  <ebb9@byu.net>

	Use memcmp2 to simplify lexicographic comparisons.
	* ltdl/m4/gnulib-cache.m4: Import memcmp2.
	* modules/m4.c (dumpdef_cmp_CB): Use it.

2009-03-19  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	Fix m4.1 build race, exposed by parallelism through GNUmakefile.
	* Makefile.am (SUBDIRS): Add doc.
	(Documentation rules): Move ...
	* doc/Makefile.am: ... to this new file.
	* configure.ac (AC_CONFIG_FILES): Generate doc/Makefile.

2009-03-13  Eric Blake  <ebb9@byu.net>

	Try to tolerate spaces in directory names in testsuite.
	* tests/null.m4: Provide shell quoting, in case __program__
	contains spaces.

	Fix awk script portability.
	* checks/get-them: In gsub, properly escape {.
	Reported by Gary V. Vaughan.

	Make bootstrap easier on Solaris.
	* bootstrap: Add GNULIB_SRCDIR.  Useful when a wrapper script
	gnulib-tool exists earlier on the path to work around /bin/sh
	failure in parsing $GNULIB_SRCDIR/gnulib-tool.

2009-03-13  Eric Blake  <ebb9@byu.net>

	Allow configuration choice in syscmd shell.
	* ltdl/m4/m4-syscmd.m4: New file.
	* configure.ac (M4_SYSCMD): Use it to provide
	--with-syscmd-shell.
	(AC_CHECK_HEADERS_ONCE): No longer need to worry about
	<sys/wait.h>.
	* modules/m4.c (syscmd): Use it to avoid hard-coding the shell
	location.
	* modules/gnu.c (esyscmd): Likewise.
	* doc/m4.texinfo (Syscmd, Esyscmd): Document this.
	* README: Document new configure option.
	* NEWS: Likewise.

	Use gnulib pipe module instead of popen(3).
	* ltdl/m4/gnulib-cache.m4: Import pipe and wait-process modules.
	* modules/gnu.c (M4_SYSVAL_EXITBITS, M4_SYSVAL_TERMSIGBITS):
	Delete.
	(esyscmd): Rewrite with pipe module.
	Resolves a failure on AIX, reported by Gary V. Vaughan.

	Use gnulib execute module instead of system(3).
	* ltdl/m4/gnulib-cache.m4: Import execute module.
	* m4/utility.c (m4_info_name): New function.
	* m4/m4module.h (m4_info_name): New prototype.
	* modules/m4.c (syscmd): Rewrite with execute module.
	(M4_SYSVAL_EXITBITS, M4_SYSVAL_TERMSIGBITS, m4_sysval): Move
	computation...
	* modules/gnu.c (M4_SYSVAL_EXITBITS, M4_SYSVAL_TERMSIGBITS)
	(esyscmd): ...here.
	Resolves a failure on AIX, reported by Gary V. Vaughan.

2009-03-05  Eric Blake  <ebb9@byu.net>

	Improve web-manual maintainer rule.
	* maint.mk (web-manual): Factor package-specific detail...
	* cfg.mk (manual_title): ...to new variable.

2009-02-23  Eric Blake  <ebb9@byu.net>

	Speed up translit when from argument is short.
	* modules/m4.c (translit): Use memchr2 when possible.
	* tests/builtins.at (translit): Add tests.
	* NEWS: Document this.

2009-02-18  Eric Blake  <ebb9@byu.net>

	Prefer buffer over byte operations.
	* modules/format.c (format): Use memchr for speed.
	* modules/gnu.c (substitute): Likewise.
	* m4/macro.c (locate_dollar): Inline into only caller...
	(process_macro): ...and rearrange for readability.
	* m4/input.c (consume_buffer): Allow C++ compilation.
	* doc/m4.texinfo (Changesyntax): Enhance test.

	Speed up esyscmd with buffer reads.
	* modules/gnu.c (esyscmd): Read blocks directly into obstack,
	rather than repeatedly reading bytes.  Detect read errors.

	Avoid risk of stack overflow.
	* m4/output.c (insert_file): Avoid stack allocation of large
	buffer.

	Synchronize THANKS with branch.
	* THANKS: Import more names.

	Improve handling of $ in syntax table.
	* m4/m4module.h (m4_is_syntax_single_dollar): New function.
	(M4_SYNTAX_DOLLAR, M4_SYNTAX_LBRACE, M4_SYNTAX_RBRACE): Change to
	be context rather than basic syntax categories.
	(M4_SYNTAX_MASKS): Adjust macro.
	* m4/m4private.h (struct m4_syntax_table): Add dollar and
	is_single_dollar members.
	(m4_is_syntax_single_dollar): Add fast alternative.
	* m4/syntax.c (m4_syntax_create, reset_syntax_set): Adjust to
	account for change to context categories.
	(m4_set_syntax): Manage is_single_dollar.
	(m4_is_syntax_single_dollar): New function.
	* m4/macro.c (locate_dollar): New helper function.
	(process_macro): Use it to speed up macro expansion.
	* m4/input.c (m4__next_token): Adjust client.
	* doc/m4.texinfo (Changesyntax): Document this.

2009-02-17  Eric Blake  <ebb9@byu.net>

	Sync changecom documentation with branch.
	* doc/m4.texinfo (Changecom): Tweak wording.
	* NEWS: Import changes from the branch.

	Stage 29b: Process quotes and comments by buffer, not bytes.
	Search for quote and comment delimiters by buffer when possible.
	Memory impact: none.
	Speed impact: noticeable improvement, from fewer function calls.
	* ltdl/m4/gnulib-cache.m4: Import memchr2 module.
	* m4/input.c (m4__next_token): Add buffer reads to quote and
	comment parsing.
	* NEWS: Document this.

2009-02-16  Eric Blake  <ebb9@byu.net>

	Stage 29a: Process dnl and macro names by buffer, not bytes.
	Enhance input engine to provide lookahead buffer, rather than
	forcing clients to call next_char for every byte.  Utilize this
	for the simplest clients.
	Memory impact: none.
	Speed impact: noticeable improvement, from fewer function calls.
	* ltdl/m4/gnulib-cache.m4: Import freadptr and freadseek modules.
	* m4/input.c (struct input_funcs): Add virtual functions
	buffer_func and consume_func.
	(file_buffer, file_consume, string_buffer, string_consume)
	(composite_buffer, composite_consume, eof_buffer): Implement
	them.
	(file_funcs, string_funcs, composite_funcs, eof_funcs): Update
	vtables accordingly.
	(buffer_retry): New sentinel.
	(next_buffer, consume_buffer): New functions.
	(m4_skip_line, match_input, consume_syntax): Use them for faster
	parsing.
	Suggested by Bruno Haible.

	Unify single and multi-character delimiter handling.
	* m4/input.c (MATCH): Add a parameter.
	(m4__next_token): Simplify logic and reduce redundancy.
	(m4__next_token_is_open): Adjust caller.
	* m4/syntax.c (m4_set_comment, m4_set_quotes): Handle delimiters
	of differing lengths.
	(m4_set_syntax): Recognize restoration of single delimiters.

	Revamp changesyntax vs. changequote interactions.
	* m4/m4module.h (M4_SYNTAX_VALUE): Delete unused macro.
	(M4_SYNTAX_SUSPECT): New macro.
	* m4/m4private.h (struct m4_syntax_table): Add suspect field.
	* m4/syntax.c (check_is_single_quotes, check_is_single_comments)
	(check_is_macro_escaped): Delete, by inlining body...
	(m4_set_syntax): ...into here.  Improves handling between
	changesyntax and changequote/changecom.
	(add_syntax_set, subtract_syntax_set, set_syntax_set): Simplify,
	and let suspect field track needed cleanup.
	(m4_set_quotes, m4_set_comment): Adjust meaning of
	is_single_quotes and is_single_comment flags to always be true if
	only one delimiter exists, regardless of its length.  Ensure that
	the syntax categories M4_SYNTAX_LQUOTE and M4_SYNTAX_BCOMM are
	only used on 1-byte delimiters.
	(add_syntax_attribute, remove_syntax_attribute): Change signature
	to allow the use of fewer casts.  Adjust the suspect field when
	necessary.
	(m4_reset_syntax, set_quote_age): Adjust callers.
	* m4/input.c (m4__next_token, m4__next_token_is_open): Simplify
	callers.
	* doc/m4.texinfo (Changesyntax): Update documentation and tests.

	Improve changesyntax documentation.
	* doc/m4.texinfo (Changesyntax): Merge two tables into one
	multitable.

	Fix regression in multicharacter quotes, from 2008-01-26.
	* m4/input.c (m4__next_token): Fix typo.
	* tests/builtins.at (changequote): Enhance test.

2009-02-13  Eric Blake  <ebb9@byu.net>

	Speed up parsing when detecting input file change.
	* m4/input.c (next_char): Clear input_change flag.  Bug introduced
	2006-10-25.

2009-02-12  Eric Blake  <ebb9@byu.net>

	Avoid quadratic code when walking definition stack.
	* examples/stack_sep.m4: Use linear, not quadratic
	implementation.
	* doc/m4.texinfo (Improved copy): Fix documentation, based on
	recent autoconf bug fix.
	* tests/others.at (recursion): Enhance test.

2009-02-11  Eric Blake  <ebb9@byu.net>

	Stage 28c: Warn on embedded NUL in remaining cases.
	Ensure all remaining warnings can handle embedded NUL.
	Memory impact: none.
	Speed impact: none noticed.
	* m4/m4module.h (m4_debug_decode, m4_parse_truth_arg): Add
	parameter.
	* m4/macro.c (m4_macro_call): Improve diagnostic.
	* modules/m4.c (defn): Likewise.
	* m4/debug.c (m4_debug_decode): Handle embedded NUL.
	* m4/utility.c (m4_parse_truth_arg): Likewise.
	* modules/format.c (arg_int, arg_long, arg_double): Likewise.
	(arg_string): New function.
	(ARG_INT, ARG_LONG, ARG_STR, ARG_DOUBLE): Update callers.
	* src/main.c (main): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* modules/gnu.c (debugmode, syncoutput): Likewise.
	* tests/options.at (--regexp-syntax): Adjust test.
	* tests/freeze.at (reloading nul): Likewise.
	* tests/null.m4: Likewise.
	* tests/null.out: Likewise.
	* tests/null.err: Likewise.

	Stage 28b: Warn on embedded NUL in file arguments.
	Quote warning messages related to file and other NUL-terminated
	system commands.
	Memory impact: none.
	Speed impact: none noticed.
	* m4/path.c (m4_path_search): Quote file names in message.
	* modules/m4.c (syscmd, include, m4_make_temp): Handle embedded
	NUL.
	* modules/gnu.c (debugfile, esyscmd): Likewise.
	* tests/others.at (nul character): Adjust test.
	* tests/builtins.at (mkdtemp, mkstemp): Likewise.
	* tests/null.m4: Likewise.
	* tests/null.out: Likewise.
	* tests/null.err: Likewise.

	Stage 28a: Warn on embedded NUL in numeric arguments.
	Quote warning messages related to numeric parsing in order to
	handle embedded NUL.
	Memory impact: none.
	Speed impact: none noticed.
	* m4/m4module.h (m4_numeric_arg): Adjust prototype.
	* m4/utility.c (m4_numeric_arg): Add parameter.
	* modules/gnu.c (debuglen): Adjust callers.
	* modules/m4.c (incr, decr, divert, undivert, m4exit, substr)
	(index): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.
	* modules/stdlib.c (setenv, getpwuid, srand): Likewise.
	* modules/time.c (ctime, gmtime, localtime, mktime, strftime):
	Likewise.
	* doc/m4.texinfo (Changesyntax): Fix typo.
	* tests/others.at (nul character): Adjust test.
	* tests/null.m4: Likewise.
	* tests/null.out: Likewise.
	* tests/null.err: Likewise.

2009-02-11  Eric Blake  <ebb9@byu.net>

	Avoid regression in popdef(undef).
	* doc/m4.texinfo (Trace): Enhance test, to cover regression
	recently fixed on the branch.

2009-02-09  Eric Blake  <ebb9@byu.net>

	Enhance index to support starting offset.
	* modules/m4.c (index): Add optional third argument.
	* NEWS: Document this.
	* doc/m4.texinfo (Index macro): Likewise.
	(Macro Arguments): Adjust tests.

2009-01-24  Eric Blake  <ebb9@byu.net>

	Add URLs to --help output.
	* src/main.c (usage): Use enhanced version-etc features.

2009-01-07  Eric Blake  <ebb9@byu.net>

	Enhance substr to support replacement text.
	* doc/m4.texinfo (Substr): Document new semantics.
	* modules/m4.c (substr): Support optional fourth argument.
	* NEWS: Document this.

	Enhance substr to support negative values.
	* doc/m4.texinfo (Substr): Document new semantics, and how to
	simulate old.
	* modules/m4.c (substr): Support negative values.
	* NEWS: Document this.

2009-01-05  Eric Blake  <ebb9@byu.net>

	Maintainer cleanups.
	* HACKING: Remove mention of xdelta.
	* Makefile.am (EXTRA_DIST, MAINTAINERCLEANFILES): Let gnulib take
	care of distributing gendocs.sh.
	* maint.mk (web-manual): Use new feature of gendocs.
	* ltdl/m4/gnulib-cache.m4: Regenerate.

2008-12-24  Eric Blake  <ebb9@byu.net>

	Relax eval as allowed by POSIX 2008.
	* modules/evalparse.c (m4_evaluate): Warn, not error, on invalid
	operator.  Quote expression in warning.
	* modules/mpeval.c (includes): Add quotearg.h.
	* doc/m4.texinfo (Eval, Improved forloop): Update tests.
	* NEWS: Update to reflect 1.6 support for `?:'.

2008-12-23  Eric Blake  <ebb9@byu.net>

	Add debugmode(o) to control dumpdef output location.
	* m4/m4module.h (M4_DEBUG_TRACE_OUTPUT_DUMPDEF): New enumerator.
	(M4_DEBUG_TRACE_VERBOSE): Update.
	* m4/debug.c (m4_debug_decode): Support new debug option.
	* src/freeze.c (produce_debugmode_state): Likewise.
	* modules/m4.c (dumpdef): When set, force dumpdef to stderr rather
	than the debug file.
	* src/main.c (usage): Document it.
	* doc/m4.texinfo (Debugmode, Dumpdef, Debugging options)
	(Debugfile): Likewise.
	* NEWS: Likewise.
	Based on an autoconf bug report by Paolo Bonzini.

	Make --debugfile argument optional.
	* src/main.c (long_options): Make the argument optional, to allow
	setting debug file back to stderr.
	(main): Make --debugfile order-dependent.
	(usage): Document this.
	* doc/m4.texinfo (Debugging options): Likewise.
	* NEWS: Likewise.
	* tests/options.at (--debugfile): Enhance test.
	(--safer): Adjust to new semantics.

2008-12-22  Eric Blake  <ebb9@byu.net>

	Use @var correctly.
	* doc/m4.texinfo (Operation modes, Preprocessor features)
	(Limits control, Frozen state, Debugging options)
	(Dynamic loading features): Use lower case names in @var.
	(Improved copy): Use @code, not @var, as appropriate.

2008-12-18  Eric Blake  <ebb9@byu.net>

	Deal with M4 1.4.x limitation on builtin tokens.
	* doc/m4.texinfo (Composition): Mention limitation on curry.
	(Improved copy): New node.
	(Stacks): Fix typo.
	* examples/stack.m4: Likewise.
	* examples/stack_sep.m4: New file.
	* Makefile.am (dist_pkgdata_DATA): Distribute it.

2008-12-15  Eric Blake  <ebb9@byu.net>

	Double size of temp file cache.
	* m4/output.c (tmp_file, tmp_file_owner): Split...
	(tmp_file1, tmp_file2, tmp_file1_owner, tmp_file2_owner): ...into
	two variables.
	(tmp_file2_recent): New variable.
	(m4_tmpopen, m4_tmpclose, m4_tmpremove, m4_tmprename)
	(m4_output_exit): Adjust callers.

	Use fewer seeks on cached files.
	* m4/output.c (m4_tmpfile): Use write, not append mode.
	(m4_tmpopen): Add parameter to decide when to skip seeks.
	(m4_tmprename, m4_make_diversion, insert_diversion_helper)
	(m4_freeze_diversions): Adjust callers.

	Cache most recently spilled diversion.
	* m4/output.c (tmp_file, tmp_file_owner): New variables, for
	1-deep cache of spilled diversions.
	(m4_tmpfile): Open in append mode, since we might revisit
	diversion without closing it now.
	(m4_tmpopen): Check cache first.
	(m4_tmpclose): Update cache, rather than closing.  Add parameter.
	(m4_tmpremove): Close cache before removing.
	(m4_tmprename): Deal with open files when renaming.
	(m4_output_exit): Close cache before exiting.
	(make_room_for, m4_make_diversion, insert_diversion_helper):
	Adjust callers.
	* ltdl/m4/m4-rename.m4 (M4_RENAME): New file.
	* configure.ac (M4_RENAME): Invoke it.

	Correctly track size of in-memory diversions.
	* m4/output.c (insert_diversion_helper): Correctly track total
	in-memory diversion size after undivert.

	Avoid quadratic behavior for some cases of divert/undivert.
	* m4/output.c (struct m4_diversion): Improve comments.
	(m4_tmpname, m4_make_diversion): Strengthen preconditions.
	(m4_tmprename): New function.
	(m4_output_init, m4_output_exit): Move after internal functions.
	(make_room_for): Don't bother copying uninitialized bytes.
	(insert_diversion_helper): Transfer metadata, rather than copying
	contents, when undiverting into a previously unused diversion.
	* tests/builtins.at (divert): Add a check to the test.
	* doc/m4.texinfo (Undivert): Enhance test.
	* NEWS: Document the speedup.

2008-12-02  Eric Blake  <ebb9@byu.net>

	Stage 27: Allow embedded NUL in text processing macros.
	Pass NUL through regular expressions, format, and translit, and
	diagnose it in eval and changeresyntax.  Improve warning
	capabilities of format.
	Memory impact: none.
	Speed impact: none noticed.
	* modules/m4.c (m4_expand_ranges): Don't append extra bytes.
	(translit): Manage NUL bytes.
	* modules/format.c (format): Likewise.
	* modules/gnu.c (substitute, regexp_substitute): Likewise.
	(m4_resyntax_encode_safe): Add parameter.
	(regexp, patsubst, renamesyms): Update callers.
	(regexp_compile): Adjust error message.
	* modules/evalparse.c (m4_evaluate): Use consistent message.
	(end_text): New variable.
	(eval_init_lex): Add parameter.
	(eval_lex): Detect embedded NUL.
	* src/freeze.c (reload_frozen_state): Likewise.
	* doc/m4.texinfo (Format): Update to cover new behavior.
	(Eval): Mention that result is unquoted.
	* tests/freeze.at (reloading nul): Enhance test.
	* tests/null.m4: Likewise.
	* tests/null.err: Update expected output.
	* tests/null.out: Likewise.
	* tests/options.at (--regexp-syntax): Likewise.

2008-11-28  Eric Blake  <ebb9@byu.net>

	Resync NEWS with branches.
	* NEWS: Mention 1.4.12, update state of 1.6.

2008-11-26  Eric Blake  <ebb9@byu.net>

	Keep COPYING in repository.
	* Makefile.am (MAINTAINERCLEANFILES): Don't remove COPYING.
	* .cvsignore: Don't ignore it.
	* .gitignore: Likewise.
	* COPYING: Store in repository, per automake 1.10.2
	recommendation.

2008-11-26  Eric Blake  <ebb9@byu.net>

	Document optimized forloop.
	* doc/m4.texinfo (Improved forloop): Mention alternate style that
	avoids define overhead.
	* examples/forloop3.m4: New file.
	* Makefile.am (dist_pkgdata_DATA): Distribute it.

	Document copy composite using stack_foreach and curry.
	* doc/m4.texinfo (Stacks): New node, to document pushdef stack
	manipulation.
	(Ifelse): Move define_blind...
	(Composition): ...to this new node.  Document currying, then use
	it to implement copy and rename.
	* examples/curry.m4: New file.
	* examples/stack.m4: Likewise.
	* Makefile.am (dist_pkgdata_DATA): Distribute them.

2008-11-04  Eric Blake  <ebb9@byu.net>

	Upgrade to FDL 1.3.
	* ltdl/m4/gnulib-cache.m4: Replace fdl module with fdl-1.3.
	* Makefile.am (doc_m4_TEXINFOS, MAINTAINERCLEANFILES): Reflect
	file change.
	* doc/m4.texinfo (GNU Free Documentation License): Likewise.

2008-10-22  Eric Blake  <ebb9@byu.net>

	Give nicer error if user modifies testsuite but lacks autoconf.
	* Makefile.am (AUTOM4TE): Use missing in the definition.

2008-10-09  Eric Blake  <ebb9@byu.net>

	Allow user to choose which sed to use in testsuite.
	* tests/atlocal.in (SED): Inherit from configure results.
	* tests/builtins.at (__m4_@&t@version__, divert, esyscmd)
	(mkstemp, syscmd): Use $SED.
	* tests/generate.awk (new_test): Likewise.
	* tests/options.at (deprecated options, unknown option)
	(--debugmode, --help and --version): Likewise.
	* tests/testsuite.at (AT_CHECK_M4): Likewise.
	* tests/others.at (directory, stderr closed, stdin seekable)
	(stdout closed): Likewise.
	(nul character): Likewise.  Also, skip test if sed can't handle
	NUL bytes.

	Clean up testsuite invocation.
	* tests/atlocal.in: Fix copyright notice.
	* Makefile.am (TESTS_ENVIRONMENT): Delete; it wasn't being used.
	(check-local, installcheck-local): Adjust clients.  Add missing
	dependency.

2008-09-25  Eric Blake  <ebb9@byu.net>

	Tweak error message on command line failure.
	* m4/m4private.h (includes): Use "quotearg.h".
	* src/main.c (process_file, main): Use nicer quotes for file name
	in error messages.
	* m4/input.c (file_clean, m4_push_file): Likewise.
	* m4/module.c (m4__module_open): Likewise.
	* src/freeze.c (produce_frozen_state, reload_frozen_state):
	Likewise.
	* modules/gnu.c (debugfile): Likewise.
	* modules/m4.c (undivert, include): Likewise.
	* tests/others.at (directory, stdin closed): Update tests.
	* tests/options.at (file names, --debugmode): Likewise.
	* doc/m4.texinfo (Debugmode): Likewise.

	Unify error handling for reading directories.
	* m4/path.c (m4_path_search): Factor open attempts...
	(m4_fopen): ...into new function, to reject directories.
	* tests/others.at (directory): Enhance test.
	* doc/m4.texinfo (Include): Document that directories cannot be
	input files.

	Avoid bugs on platforms that mishandle trailing /.
	* ltdl/m4/gnulib-cache.m4: Import fopen module.
	* tests/others.at (directory): New test.

2008-09-16  Eric Blake  <ebb9@byu.net>

	Fix bootstrap for Solaris /bin/sh.
	* bootstrap: Avoid shell quoting pitfall.

2008-09-01  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	Typos in source code comments.
	* modules/m4.c: Fix typos in comments.
	* m4/input.c: Likewise.
	* src/main.c: Likewise.

2008-08-29  Eric Blake  <ebb9@byu.net>

	Fix manual date information.
	* doc/m4.texinfo: UPDATED refers to the day the manual was built,
	not the release date of M4.
	Based on a bison patch by Akim Demaille.

2008-08-27  Eric Blake  <ebb9@byu.net>

	Tweak -d examples.
	* doc/m4.texinfo (Invoking m4): Fix example, since order of -d
	matters.
	(Dumpdef): Fix typo.

2008-08-23  Eric Blake  <ebb9@byu.net>

	Allow debugmode control over whether defn(undef) warns.
	* ltdl/m4/gnulib-cache.m4: Import verify module.
	* m4/m4module.h (M4_DEBUG_TRACE_DEREF, M4_DEBUG_TRACE_INITIAL):
	New values.
	(M4_DEBUG_TRACE_VERBOSE, M4_DEBUG_TRACE_DEFAULT): Adjust.
	* m4/m4.c (m4_create): Start with debugmode = d.
	* src/main.c (usage): Mention this.
	(main): Let -E impact debug mode.
	* m4/utility.c (m4_symbol_value_lookup): Squelch undefined warning
	if flag is clear.
	* modules/gnu.c (builtin, inder): Likewise.
	* m4/debug.c (m4_debug_decode): Parse new mode.
	* src/freeze.c (produce_debugmode_state): Accomodate new mode.
	* doc/m4.texinfo (Debugging options): Mention change in the
	default behavior.
	(Debugmode): Mention new flag d.
	(Operation modes): Mention interaction with -E.
	(Undefine, Defn, Pushdef, Indir, Builtin, Dumpdef): Document and
	test its effect.
	* tests/options.at (--debugmode): Update tests.
	* tests/freeze.at (reloading debugmode): Likewise.
	* NEWS: Document this.
	Reported by Ralf Wildenhues; without this patch, M4 1.6+ would be
	incompatible with Autoconf 2.62.

2008-08-22  Eric Blake  <ebb9@byu.net>

	Improve --debugmode behavior.
	* m4/m4module.h (m4_debug_decode): Simplify interface.
	* m4/debug.c (m4_debug_decode): Remove parameter, and handle
	setting the new value.
	* modules/gnu.c (debugmode): Adjust caller.
	* src/freeze.c (reload_frozen_state): Likewise.
	* src/main.c (main): Likewise.
	(usage): Fix default for --debug.
	* doc/m4.texinfo (Debugging options): Add an example.

2008-08-21  Eric Blake  <ebb9@byu.net>

	Avoid regression in defn(undef).
	* doc/m4.texinfo (Trace): Enhance test, to cover regression
	recently fixed on the branch.

2008-08-18  Eric Blake  <ebb9@byu.net>

	Remove deprecated -N option; fixes a regression from 2006-09-14.
	* src/main.c (DIVERSIONS_OPTION): Delete.
	(long_options, OPTSTRING, main): Remove -N/--diversions option.
	* doc/m4.texinfo (Limits control): Remove it from the manual.
	* NEWS: Mention that it is gone.
	* tests/options.at (deprecated options): Update test.

	Improve 'git diff' of manual source.
	* .gitattributes (*.texi*): Add diff attribute.
	* bootstrap: Tell git how to use it.
	Inspired by Jim Meyering's similar patch for coreutils.

2008-08-07  Bruno Haible  <bruno@clisp.org>  (tiny change)

	Run m4 tests prior to gnulib unit tests.
	* Makefile.am (SUBDIRS): Swap order of directories.

2008-08-03  Eric Blake  <ebb9@byu.net>

	Stage 26: Allow embedded NUL in macro definitions.
	Clean up final few locations that did not track macro definitions
	by length, to allow embedded NUL.  Make m4_arg_len callers aware
	of issue of flattening builtins when determining length.
	Memory impact: none.
	Speed impact: none noticed.
	* m4/m4module.h (m4_arg_len): Add parameter.
	(M4ARGLEN): Provide default for the parameter.
	* m4/m4private.h (includes): Share xmemdup0.h among all libm4
	files.
	* m4/macro.c (m4_arg_len): Fail if builtins are not flattened.
	* m4/syntax.c (includes): Rely on m4private.h for xmemdup0.
	* m4/symtab.c (includes): Likewise.
	(m4_symbol_value_copy): Use xmemdup0.
	* m4/module.c (install_macro_table): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* tests/freeze.at (reloading nul): Enhance test.
	* tests/null.m4: Likewise.
	* tests/null.err: Update expected output.
	* tests/null.out: Likewise.

	Fix regression in commenting unbalanced quotes, from 2008-02-16.
	* m4/m4private.h (m4__token_type): Add M4_TOKEN_COMMENT.
	* m4/input.c (m4__next_token, m4_print_token): Supply new token
	type for comments.
	* m4/macro.c (expand_token): Penalize comments, as they can
	contain unbalanced quotes; latent bug since 2007-12-07, exposed by
	passing $@ references built from comments.
	(expand_argument): Adjust caller.
	* tests/others.at (Comments): Enhance test to catch it.
	* NEWS: Mention the fix.

2008-07-30  Eric Blake  <ebb9@byu.net>

	Fix regression in trace output, introduced 2008-05-08.
	* m4/input.c (m4__push_symbol): When cloning chains, break pointer
	back to original chain; latent bug from 2008-02-02 that did not
	cause misbehavior until trace output read unfinished chain.
	* tests/builtins.at (debug): Add test for this.

2008-07-28  Eric Blake  <ebb9@byu.net>

	Optimize iteration examples.
	* examples/forloop2.m4: Avoid excess indir, by passing current
	counter value as parameter.
	* examples/foreachq3.m4: Avoid unneeded ifelse, by injecting an
	ignored argument.
	* doc/m4.texinfo (Improved forloop, Improved foreach): Update the
	documentation to match.

2008-07-26  Eric Blake  <ebb9@byu.net>

	Give example for O(n) foreach on m4 1.4.x.
	* examples/foreachq4.m4: New file.
	* Makefile.am (dist_pkgdata_DATA): Distribute it.
	* tests/others.at (recursion): Test it.
	* doc/m4.texinfo (Improved foreach): Document linear foreach with
	m4 1.4.5 and greater.

2008-07-19  Eric Blake  <ebb9@byu.net>

	Resynchronize docs from branch.
	* doc/m4.texinfo (Undefine, Pushdef): Mention warning on undefined
	name, particularly since the old documentation didn't match code.
	(Standard Modules): Add caveat about using __m4_version__.

2008-07-11  Eric Blake  <ebb9@byu.net>

	Bump required automake to 1.10a; regression introduced 2008-01-22.
	* configure.ac (AM_INIT_AUTOMAKE): Undo requirement downgrade to
	1.10.1, since we also rely on pkglibexecdir.
	* HACKING: Fix minimum requirement.
	* bootstrap: Likewise.
	* THANKS: Update.
	Reported by Joel E. Denny.

	Avoid bogus whitespace in @ovar, @dvar.
	* doc/m4.texinfo (ovar, dvar): Add @c.
	Based on patch by Ralf Wildenhues to Autoconf manual.

2008-06-23  Eric Blake  <ebb9@byu.net>

	Adjust to new gnulib-tool layout.
	* ltdl/m4/gnulib-cache.m4: Reformat.

	Fix bootstrap comment.
	* bootstrap: DOWNLOAD_PO was previously removed.

2008-06-19  Eric Blake  <ebb9@byu.net>

	Revert speed regression from 2008-06-16.
	* m4/output.c (m4_shipout_int): Avoid obstack_printf in hot path.
	* modules/m4.c (numb_obstack): Likewise.
	* m4/input.c (MATCH): Use fewer conditionals, and factor
	adjustment of S...
	(match_input): ...here for smaller code size.
	* m4/syntax.c (m4_reset_syntax, m4_set_quotes, m4_set_comment):
	Supply trailing NUL to delimiters, to meet contract of faster
	MATCH.

2008-06-18  Eric Blake  <ebb9@byu.net>

	Whitespace cleanup.
	* m4/m4module.h: Use consistent spacing for pointer parameters.
	* m4/m4private.h: Likewise.

	Stage 25b: Handle embedded NUL in changesyntax and friends.
	Track quote and comment delimiters by length, to allow embedded
	NUL.  Improve changesyntax to support assigning syntax to NUL.
	Memory impact: none.
	Speed impact: none noticed.
	* m4/m4module.h (m4_set_quotes, m4_set_comment, m4_set_syntax):
	Add parameter.
	(m4_reset_syntax): New prototype.
	* m4/syntax.c (add_syntax_set, subtract_syntax_set)
	(set_syntax_set, m4_set_quotes, m4_set_comment): Add parameter, to
	handle embedded NUL.
	(m4_set_syntax): Likewise.  Also, split code to reset the table...
	(m4_reset_syntax): ...into a new function.
	(m4_syntax_create): Adjust callers.
	* m4/input.c (match_input, MATCH): Add parameter.
	(m4__next_token, m4__next_token_is_open): Adjust callers.
	* modules/m4.h (m4_expand_ranges_func): Add parameter.
	* modules/m4.c (dumpdef): Handle NUL in dumped quotes.
	(changequote, changecom, translit, m4_expand_ranges): Track
	delimiter length.
	* modules/gnu.c (changesyntax): Handle embedded NUL.
	* src/freeze.c (reload_frozen_state): Adjust callers.
	* tests/freeze.at (reloading nul): Enhance test.
	* tests/null.m4: Likewise.
	* tests/null.out: Update expected output.
	* tests/null.err: Likewise.

2008-06-16  Eric Blake  <ebb9@byu.net>

	Stage 25a: Use obstack_printf for easier output.
	Convert macro tracing and other locations to use obstack_printf
	rather than hand-rolled equivalents.  Ensure that embedded NUL in
	trace output does not truncate the trace string.
	Memory impact: none.
	Speed impact: noticeable penalty, from obstack_printf overhead.
	* ltdl/m4/gnulib-cache.m4: Import obstack-printf-posix module.
	* m4/macro.c (trace_format): Delete; use obstack_printf instead.
	(trace_header, trace_pre, trace_post): All callers updated.
	* m4/output.c (m4_shipout_int, m4_tmpname): Use obstack_printf.
	(m4_divert_text): Speed up syncline output.
	* modules/m4.c (dumpdef): Handle embedded NUL.
	(numb_obstack): Speed up eval output.
	(maketemp): Use obstack_printf.
	* modules/format.c (format): Likewise.

	Add missing const qualifications.
	* m4/resyntax.c (m4_resyntax_map): Declare array elements as
	const.
	* modules/gnu.c (m4_builtin_table, m4_macro_table): Likewise.
	* modules/import.c (m4_builtin_table): Likewise.
	* modules/load.c (m4_builtin_table, m4_macro_table): Likewise.
	* modules/m4.c (m4_builtin_table): Likewise.
	* modules/modtest.c (m4_builtin_table, m4_macro_table): Likewise.
	* modules/mpeval.c (m4_builtin_table, m4_macro_table): Likewise.
	* modules/perl.c (m4_builtin_table, m4_macro_table): Likewise.
	* modules/shadow.c (m4_builtin_table, m4_macro_table): Likewise.
	* modules/stdlib.c (m4_builtin_table): Likewise.
	* modules/time.c (m4_builtin_table): Likewise.
	* modules/traditional.c (m4_macro_table): Likewise.

2008-06-10  Eric Blake  <ebb9@byu.net>

	Avoid corrupted frozen file if NUL appears on block boundary.
	* m4/output.c (insert_file): Separate consecutive quotearg blocks
	with \<newline>, in case last byte of first block was NUL.

2008-06-03  Eric Blake  <ebb9@byu.net>

	Fix printf type mismatches.
	* m4/m4module.h (m4_bad_argc): Alter parameter type.
	* m4/m4private.h (struct m4_call_info): Alter call_id type.
	* m4/macro.c (expand_macro, m4__adjust_refcount): Use correct
	specifiers.
	* m4/utility.c (m4_bad_argc): Likewise.

	Borrow bootstrap ideas from gnulib.
	* bootstrap (options, DOWNLOAD_PO): Remove --download-po; the
	advertized subset of languages didn't work.  Use --skip-po
	instead, for consistency with gnulib bootstrap.
	(func_get_translations): Use rsync, not wget.
	(func_update_po): Use a reference directory, to avoid changing
	timestamps on unchanged .po files.
	* TODO: Update accordingly.

	Fix fallout from previous patch.
	* doc/m4.texinfo (Builtin): Adjust expected output.

2008-06-02  Eric Blake  <ebb9@byu.net>

	Stage 24c: Improve display of macro names with embedded NUL.
	Quote instances of problematic characters in macro names when
	presented to user.  Track location via call_info rather than
	munging context for every expansion.
	Memory impact: none.
	Speed impact: slight penalty, due to more bookkeeping.
	* m4/m4module.h (m4_push_string_init): Add parameters.
	* m4/m4private.h (struct m4_macro_args): Remove argv0 and
	argv0_len, now redundant with info.
	(m4__push_wrapup_init): Add parameter.
	* m4/input.c (m4_push_string_init, m4__push_wrapup_init): Track
	location from caller, rather than context.
	(composite_peek, composite_read, match_input): Adjust callers.
	* m4/utility.c (m4_symbol_value_lookup): Quote macro name.
	(m4_verror_at_line): Allow NUL in macro name.
	* m4/macro.c (trace_flush, m4_trace_prepare, trace_pre): Allow NUL
	in trace.
	(expand_macro): No longer munge context location.
	(collect_arguments, m4_arg_text, m4_arg_empty, m4_arg_len)
	(m4_make_argv_ref, m4_push_arg, m4_wrap_args): Adjust callers.
	* modules/gnu.c (builtin, indir): Likewise.
	* tests/null.m4: Enhance test.
	* tests/null.err: Adjust expected output.
	* tests/null.out: Likewise.

	Stage 24b: Allow embedded NUL in macro names.
	Use length rather than NUL-termination when tracking macro names.
	All APIs dealing with symbol table changed.
	Memory impact: none.
	Speed impact: slight penalty, due to more bookkeeping.
	* m4/m4module.h (m4_symtab_apply_func, m4_symbol_lookup)
	(m4_symbol_pushdef, m4_symbol_define, m4_symbol_popdef)
	(m4_symbol_rename, m4_symbol_delete): Add length parameter.
	(m4_string): New type.
	* ltdl/m4/gnulib-cache.m4: Import xmemdup0 module.
	* m4/hash.c (m4_hash_string_hash, m4_hash_string_cmp): Account for
	length.
	* m4/symtab.c (m4_symtab_delete, m4_symtab_apply, symtab_fetch)
	(m4__symtab_remove_module_references, symbol_destroy_CB)
	(m4_symbol_lookup, m4_symbol_pushdef, m4_symbol_define)
	(m4_symbol_popdef, m4_symbol_rename, m4_set_symbol_name_traced)
	(m4_symbol_delete): Likewise.
	* modules/m4.h (struct m4_dump_symbol_data): Adjust type to allow
	passing length.
	* m4/macro.c (expand_token): Adjust all callers.
	* m4/module.c (install_builtin_table, install_macro_table):
	Likewise.
	* m4/utility.c (m4_symbol_value_lookup): Likewise.
	* modules/gnu.c (indir, renamesyms, m4symbols): Likewise.
	* modules/m4.c (define, undefine, pushdef, popdef)
	(dumpdef_cmp_CB, dump_symbol_CB, m4_dump_symbols, dumpdef)
	(traceon, traceoff): Likewise.
	* src/main.c (main): Likewise.
	* src/freeze.c (dump_symbol_CB, reload_frozen_state): Likewise.
	* tests/freeze.at (reloading nul): Augment test.
	* tests/null.out: Adjust expected output.

	Stage 24a: Use full call context in error reporting.
	Replace const char *macro_name with const m4_call_info *call, so
	that the next patch can pass the length of macro_name with
	embedded NUL.  Simplifies handling of global state.
	Memory impact: none.
	Speed impact: none noticed.
	* m4/m4module.h (m4_error, m4_warn): Change parameter type.
	(m4_error_at_line, m4_warn_at_line): Delete.
	(m4_debug_set_output, m4_skip_line, m4_bad_argc, m4_numeric_arg)
	(m4_parse_truth_arg, m4_symbol_value_lookup): Adjust all clients.
	* m4/m4private.h (m4__next_token): Likewise.
	* m4/utility.c (m4_verror_at_line): Alter parameter, and use
	caller's location if caller is provided.
	(m4_error, m4_warn): Change parameter type.
	(m4_error_at_line, m4_warn_at_line): Delete.
	(m4_bad_argc, m4_numeric_arg, m4_parse_truth_arg)
	(m4_symbol_value_lookup): Adjust all callers.
	* m4/debug.c (set_debug_file, m4_debug_set_output): Likewise.
	* m4/input.c (m4_skip_line, m4__next_token): Likewise.
	* m4/macro.c (expand_argument, collect_arguments, m4_macro_call)
	(process_macro): Likewise.
	* modules/m4.h (m4_make_temp_func): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.
	* modules/format.c (arg_int, arg_long, arg_double, format):
	Likewise.
	* modules/gnu.c (builtin, changeresyntax, changesyntax, debugfile)
	(debuglen, debugmode, esyscmd, indir, mkdtemp, patsubst, regexp)
	(renamesyms, syncoutput, regexp_compile, substitute)
	(regexp_substitute, m4_resyntax_encode_safe): Likewise.
	* modules/m4.c (define, undefine, pushdef, popdef, ifdef, ifelse)
	(m4_dump_symbols, defn, syscmd, incr, decr, divert, undivert, dnl)
	(include, maketemp, mkstemp, m4exit, traceon, traceoff, substr):
	Likewise.
	* modules/stdlib.c (setenv, getpwuid, srand): Likewise.
	* modules/time.c (ctime, gmtime, localtime, mktime, strftime):
	Likewise.
	* tests/options.at (--syncoutput): Add test for invalid
	command-line argument.  Split xfailed portion...
	(--syncoutput and diversions): ...into new test.
	(unknown option): New test.
	* tests/freeze.at (reloading unknown builtin): Update expected
	output.

	Adjust to recent gnulib change.
	* configure.ac (AB_INIT): Delete, now that gnulib does this.

2008-05-28  Eric Blake  <ebb9@byu.net>

	Improve frozen debugmode behavior.
	* m4/debug.c (m4_debug_decode): Make empty debugmode additive.
	* src/main.c (main): Interleave -d with files.
	* tests/options.at (--debugmode): Update test.
	* tests/freeze.at (reloading debugmode): New test.
	* doc/m4.texinfo (Debugging options, Debugmode): Document the
	change.
	* NEWS: Likewise.

2008-05-27  Eric Blake  <ebb9@byu.net>

	Fix some testsuite failures on Solaris 8.
	* tests/builtins.at (esyscmd, syscmd): Skip tests if system(2) is
	broken.
	* tests/others.at (stderr closed): Likewise.  Also support Solaris
	wording for EBADF.
	(stdin closed): Skip test if closed stdin gets reopened.
	(stdout closed): Support Solaris wording for EBADF.
	* tests/testsuite.at (AT_CHECK_M4): Likewise.

	Fix configure message nesting, broken since 2001-09-20.
	* ltdl/m4/gmp.m4 (M4_LIB_GMP): Don't cache result; the test is
	not expensive, and AC_MSG_WARN doesn't work in AC_CACHE_CHECK.

	Support 'make dist' with BSD make.
	* Makefile.am (TESTSUITE_AT, MAINTAINERCLEANFILES): Qualify uses
	of the generated file tests/generated.at.
	(EXTRA_DIST, $(TESTSUITE)): Likewise for tests/package.m4.
	* tests/others.at (stdout closed): Accomodate OpenBSD /bin/sh.

2008-05-24  Eric Blake  <ebb9@byu.net>

	Test NUL in frozen files.
	* tests/testsuite.at (AT_CHECK_M4): Add parameter.
	* tests/freeze.at (reloading nul): New test.
	(AT_TEST_FREEZE): Inhibit -d when reloading frozen file.
	(reloading unknown builtin): Likewise.

2008-05-23  Eric Blake  <ebb9@byu.net>

	Improve handling of frozen file errors.
	* src/freeze.c (produce_frozen_state): Detect write failures.
	(reload_frozen_state): Use close_stream.
	* tests/freeze.at (freezing failure): New test.
	* THANKS: Update.
	Reported by Jean-Charles Longuet.

2008-05-19  Eric Blake  <ebb9@byu.net>

	In frozen file, split consecutive strings with newline.
	* src/freeze.c (dump_symbol_CB): Add newline to 'T', 'F'.
	(produce_frozen_state): Likewise for 'Q', 'C'.
	(reload_frozen_state): Parse the new layout.
	[GET_DIRECTIVE]: Fix format 1 regression from 2008-05-13.
	* tests/freeze.at (loading format 2): Rewrite to new format.
	(reloading unknown builtin): Likewise.
	(loading format 1): Make sure backslash-newline is not
	interpreted.
	* doc/m4.texinfo (Frozen file format 2): Document the format.
	* NEWS: Document this change.

	Fix xgettext options.
	* po/Makevars (XGETTEXT_OPTIONS): The " must be passed to
	xgettext.

	Fix spelling of René Seindal's name in --version output.
	* ltdl/m4/gnulib-cache.m4: Import propername module.
	* src/main.c (AUTHORS): Rewrite in terms of proper_name.
	* po/Makevars (XGETTEXT_OPTIONS): Detect new functions.
	* HACKING: Mention new prerequisite of gperf.

2008-05-18  Eric Blake  <ebb9@byu.net>

	Allow freezing the trace status of macros.
	* src/freeze.c (produce_symbol_dump): Let undefined traced macros
	through.
	(dump_symbol_CB): Also freeze trace state.
	* tests/freeze.at (reloading traced macros): New test.
	* doc/m4.texinfo (Using frozen files): Update documentation to
	mention new state.
	(Frozen file format 1): Improve synchronization with branch.
	(Frozen file format 2): Reorder directives, and add `d', `t'.
	* NEWS: Document this change.

2008-05-15  Eric Blake  <ebb9@byu.net>

	Fix frozen file regression in pushdef stacks from 2001-09-01.
	* src/freeze.c (dump_symbol_CB): Push all values on the stack, not
	just the current definition.
	(reverse_symbol_value_stack): New helper method.
	* tests/freeze.at (AT_TEST_FREEZE): New helper macro.
	(reloading pushdef stack): New test.
	(reloading unknown builtin): Enhance test.

2008-05-13  Eric Blake  <ebb9@byu.net>

	Fix frozen file regression in diversions from 2007-01-21.
	* m4/output.c (insert_diversion_helper): Add parameter.
	(m4_insert_file): Move contents...
	(insert_file): ...to this new helper, with added parameter.
	(m4_insert_diversion, m4_undivert_all, m4_freeze_diversions):
	Update callers.
	* src/freeze.c (produce_mem_dump): Simplify.
	* tests/freeze.at (large diversion): Test for this.

	Improve error message when frozen file is invalid.
	* src/freeze.c (decode_char): Add parameter.  Allow \<newline>
	line continuations.
	(reload_frozen_state): Track current line.
	* tests/freeze.at (loading format 1, loading format 2): Update to
	test this.

2008-05-10  Eric Blake  <ebb9@byu.net>

	Detect integer overflow when loading frozen file.
	* src/freeze.c (reload_frozen_state) [GET_NUMBER]: Rewrite to fail
	immediately on overflow.
	* tests/freeze.at (loading format 2): Test this.
	Reported by Jim Meyering.

2008-05-08  Eric Blake  <ebb9@byu.net>

	Stage 23: allow tracing of indirect macro calls.
	Track all trace information as part of the argv struct, rather
	than temporarily resetting global state.  Teach indir to trace
	macros that it invokes.
	Memory impact: slight penalty, due to larger argv struct.
	Speed impact: none noticed.
	* m4/m4module.h (m4_input_block): Remove.
	(m4_call_info): New opaque type.
	(m4_trace_prepare, m4_arg_info): New prototypes.
	(m4_macro_call, m4_push_string_finish, m4_input_print): Change
	prototypes.
	* m4/m4private.h (struct m4_macro_args): Add info field.
	(struct m4_call_info): New structure.
	(m4_arg_info): New accessor.
	* m4/input.c (m4_input_block): Make typedef local.
	(m4_push_string_init): Initialize length.
	(m4_push_string_finish, m4_input_print): Change signature, so that
	printing can be done before finalization.
	(struct input_funcs): Add parameter to print_func.
	(file_print, string_print, composite_print): Adjust accordingly.
	* m4/macro.c (trace_header, trace_flush, trace_pre, trace_post):
	Change signatures for stacked trace messages, and for using call
	context.
	(trace_prepre): Export and rename...
	(m4_trace_prepare): ...to this, for use by indir.  Alter signature
	to use call context.
	(collect_arguments): Alter signature, to manage new field.
	(expand_macro): Change call context management.  Move tracing...
	(m4_macro_call): ...here.  Remove redundant parameter.
	(m4_arg_argc): New function.
	(m4_make_argv_ref): Replace unused skip parameter with new trace
	parameter; manage new field.
	* modules/gnu.c (builtin, indir): Adjust callers.
	* src/main.c (usage): Update debugmode flag summary.
	* tests/null.m4: Enhance test.
	* tests/null.err: Update expected output.
	* tests/macros.at (Tracing Hanoi Towers): Likewise.
	* doc/m4.texinfo (Trace): Mention more about trace formatting.
	(Debugmode): Enhance description of 'c' and 'x'.  Enhance test to
	cover line numbering details in traces.
	(Debuglen): Enhance test to cover indir tracing.
	* NEWS: Mention these changes.
	Reported by Akim Demaille in the autoconf TODO file in 2000.

2008-05-07  Eric Blake  <ebb9@byu.net>

	Test for traceon regression just fixed in branch-1.6.
	* doc/m4.texinfo (Trace): Enhance test.
	* NEWS: Port news item from branch.

2008-05-05  Eric Blake  <ebb9@byu.net>

	Stage 22: allow builtin token concatenation outside $@.
	Adjust the input and argument parsing engines to append builtins
	alongside text.  Make define warn when builtins must be
	flattened.
	Memory impact: slight penalty, with fewer builtins flattened.
	Speed impact: slight penalty, from more bookkeeping.
	* m4/m4module.h (m4_is_arg_composite): New prototype.
	(m4_symbol_value_copy): Change return type.
	(m4_arg_text): Add parameter.
	(M4ARG): Adjust callers.
	* m4/m4private.h: Adjust comments.
	* m4/symtab.c (m4_symbol_value_copy): Detect when builtins are
	flattened.
	* m4/input.c (init_builtin_token): Add parameter, and allow
	concatenating builtins.
	(m4__next_token): Adjust caller.
	* m4/macro.c (m4_is_arg_composite): New function.
	(expand_argument): Allow builtin concatenation.
	(m4_arg_text): Add parameter.
	(m4__arg_adjust_refcount, m4__arg_print): Adjust callers.
	(m4_arg_equal): Fix comparison of builtin tokens.
	* modules/m4.c (define, pushdef): Warn when flattening builtins.
	* doc/m4.texinfo (Define): Remove dead comment.
	(Defn): Update to reflect code changes.
	* tests/builtins.at (defn): Remove xfail.
	* NEWS: Document this change.

2008-05-03  Eric Blake  <ebb9@byu.net>

	Document define_blind.
	* doc/m4.texinfo (Ifelse): Add a new composite macro.
	* THANKS: Update.
	Suggested by Mike R.

2008-05-01  Eric Blake  <ebb9@byu.net>

	Avoid -Wshadow compiler warnings.
	* m4/output.c (threshold_diversion_CB): s/div/diversion/.
	* m4/macro.c (make_argv_ref, arg_symbol, m4_arg_symbol)
	(m4_is_arg_text, m4_is_arg_func, m4_arg_text, m4_arg_empty)
	(m4_arg_len, m4_arg_func, m4__arg_print, m4_make_argv_ref)
	(m4_push_arg, m4__push_arg_quote): s/index/arg/.
	* modules/format.c (format): Likewise.
	* modules/m4.c (ifelse): Likewise.

	Improve debugmode testing, based on recent branch-1.6 regressions.
	* doc/m4.texinfo (Debugmode): Enhance tests.
	* tests/generate.awk: Run tests from stdin, not input.m4.  Support
	stderr munging when using -I examples.

	Fix regression in define from 2008-02-22.
	* m4/m4module.h (m4_symbol_value_copy): Add parameter.
	* m4/symtab.c (m4_symbol_value_copy): Support copying $@
	back-references.
	* m4/macro.c (expand_argument): Update callers.
	* modules/m4.c (define, pushdef): Likewise.
	* tests/builtins.at (define): Enhance test to catch this.

2008-04-21  Eric Blake  <ebb9@byu.net>

	Simplify previous patch.
	* tests/m4.in: Compress assignment.
	Suggested by Gary V. Vaughan.

	Fix --disable-shared testsuite regression from previous patch.
	* tests/m4.in: Export M4MODPATH, so that recursive m4 invocations
	will also work.

	Fix spelling of attribution to Christopher Strachey.
	* doc/m4.texinfo (History, Inhibiting Invocation): Fix typo.
	* THANKS: Update.
	Reported by Fernando Carrijo.

2008-04-17  Eric Blake  <ebb9@byu.net>

	Fix testsuite bug when SIGPIPE is ignored.
	* tests/builtins.at (divert): Consume all of m4's output, to avoid
	spurious write failure.
	* src/main.c (main): In batch mode, restore default handling of
	SIGPIPE.
	* doc/m4.texinfo (Operation modes): Document SIGPIPE behavior.
	* THANKS: Update.
	Reported by Bob Proulx, via his autobuilder.

2008-04-15  Eric Blake  <ebb9@byu.net>

	Fix 'make installcheck' after './configure --prefix-progname'.
	* tests/testsuite.at (AT_CHECK_M4): Allow overriding the m4
	program name.
	(HELP_OTHER, PREPARE_TESTS): Document and use $M4.
	* tests/builtins.at (patsubst): Avoid space-tab.
	(divert, mkdtemp, mkstemp): Adjust tests to use $M4.
	* tests/options.at (--debugfile): Likewise.
	* tests/others.at (stdin seekable): Likewise.
	(fstab): Avoid space-tab.
	* Makefile.am (installcheck-local): Accomodate transformed name.
	(DISTCHECK_CONFIGURE_FLAGS): Ensure no regressions, by using gm4
	during 'make distcheck'.
	* cfg.mk: New file, borrowed from branch.

	Update prerequisite tools to match recent releases.
	* configure.ac (AC_PREREQ): Rely on released autoconf.
	(LT_PREREQ): Rely on released libtool.
	* tests/testsuite.at (m4_version_prereq): Update dependence.
	* bootstrap: Mention prerequisites.

	Work around OS/2 limitation of printf(1).
	* tests/null.m4: Use m4, not printf, to generate NUL byte.
	* tests/null.out: Check for esyscmd failure.
	Reported by Elbert Pol.

2008-04-14  Eric Blake  <ebb9@byu.net>

	Stage 21b: $@ concatenates builtins, m4wrap takes builtins.
	Improve arg_print to handle builtin tokens when printing to a
	known chain, rather than always flattening builtins.  This allows
	m4wrap and $@ back-references to handle embedded builtin tokens.
	Memory impact: none.
	Speed impact: slight penalty, from more bookkeeping.
	* m4/m4module.h (m4_push_builtin): Add parameter.
	(m4_builtin_print, m4_push_wrapup_init, m4_push_wrapup_finish)
	(m4_arg_print, m4_symbol_value_print): Rename and reduce scope...
	* m4/m4private.h (m4__builtin_print, m4__push_wrapup_init)
	(m4__push_wrapup_finish, m4__arg_print, m4__symbol_value_print):
	...to these, in some cases adding a parameter.
	(m4__append_builtin): New prototype.
	* m4/builtin.c (m4_builtin_print): Alter signature to print
	builtin to a growing symbol chain.
	* m4/symtab.c (m4__symbol_value_print): Alter signature.
	(m4_symbol_print, dump_symbol_CB): Adjust callers.
	* m4/input.c (builtin_peek, builtin_read, builtin_unget)
	(builtin_print, builtin_funcs): Delete, handled via composite
	blocks now.
	(struct m4_input_block): Delete u.builtin member.
	(init_builtin_token): Only use composite block.
	(m4__append_builtin): New function.
	(m4_push_builtin, m4__push_wrapup_init): Alter signature.
	(m4__push_symbol): Allow builtin tokens.
	(m4__push_wrapup_finish): Rename.
	(composite_print, m4_print_token): Adjust callers.
	* m4/macro.c (m4_wrap_args, collect_arguments): Allow builtin
	tokens.
	(m4__arg_print): Alter signature.
	(trace_prepre, trace_pre, m4_arg_text, m4_arg_equal): Adjust
	callers.
	* modules/m4.c (m4wrap): Allow builtin tokens.
	(defn, errprint): Adjust callers.
	* modules/gnu.c (builtin): Likewise.
	* doc/m4.texinfo (M4wrap): New test.
	(Debuglen): Adjust expected output.

	Stage 21a: Optimize checks for end of input.
	Create a new polymorphic input block type, which always fails with
	CHAR_EOF, so that remaining input routines no longer have to check
	for NULL input block.
	Memory impact: none.
	Speed impact: noticeable improvement, from fewer conditionals.
	* m4/input.c (eof_funcs, input_eof): New objects.
	(eof_peek, eof_read, eof_unget): New functions.
	(file_clean, m4_push_string_init, pop_input, m4_push_wrapup_init)
	(m4_pop_wrapup, next_char, peek_char, unget_input, m4_input_init)
	(m4_input_exit): Use placeholder to guarantee non-NULL isp and
	wsp.
	(next_char): Rename retry to allow_unget, and change sense for
	easier manipulation.  All callers changed.

	Improve OS/2 detection.
	* modules/gnu.c (m4_macro_table): Ensure all possible identifiers
	are defined, not just the first.  The testsuite ensures that
	exactly one gets defined.
	* m4/system_.h [__EMX__]: OS/2 is not Unix-compatible, no matter
	what other pre-defined macros it has.
	* THANKS: Update.
	Reported by Elbert Pol.

	Ensure __m4_version__ is unquoted.
	* tests/builtins.at (__m4_@&t@version__): Augment test.

	Avoid GNU make failure on tarball.
	* Makefile.am (EXTRA_DIST): Distribute cfg.mk and maint.mk.

2008-04-10  Eric Blake  <ebb9@byu.net>

	Allow back-referenced macro names; fixes 2008-03-13 regression.
	* m4/m4module.h (m4_symbol_value_lookup): Change prototype.
	* m4/utility.c (m4_symbol_value_lookup): Change signature.
	* modules/m4.c (undefine, popdef, ifdef, m4_dump_symbols, defn):
	Adjust all callers.
	* tests/others.at (ifndef): New test.

	Be namespace clean for M4 version; fixes 2008-04-08 regression.
	* configure.ac (version): Rename...
	(M4_VERSION): ...to this, since using 'version' broke po.m4.

2008-04-09  Eric Blake  <ebb9@byu.net>

	Mention 1.4.11 release.
	* doc/m4.texinfo (History, Defn, Ifdef, Ifelse, M4wrap)
	(Extensions, Improved foreach): Distinguish 1.4.11 and 1.6.
	(Format): Add test of C99 hex-float parsing.
	* NEWS: Mention 1.4.11 release.
	* tests/builtins.at (divert): Add additional test.

2008-04-08  Eric Blake  <ebb9@byu.net>

	Overhaul inter-version releases to work with git.
	* configure.ac (version): New variable, which has nicer version
	contents when using git 1.5.5+, hardcoded to 1.9a otherwise.
	(TIMESTAMP): Delete, since CVS id expansion died with transition
	to git.
	(AM_INIT_AUTOMAKE): Use version to decide gnu vs. gnits.
	* build-aux/mkstamp: Delete, no longer used.
	* Makefile.am (CONFIG_STATUS_DEPENDENCIES): Kill, to speed up
	rebuilds when timestamps don't matter.
	(MKSTAMP): Delete, no longer used.
	(EXTRA_DIST): No longer worry about mkstamp.
	(.version): New rule and distributed file.
	(doc/m4.1, tests/package.m4): Depend on .version, not
	configure.ac, for timestamp.
	* ltdl/m4/gnulib-cache.m4: Import git-version-gen module.
	* modules/gnu.c (__m4_version__): TIMESTAMP no longer exists.
	* src/main.c (main): Likewise.

2008-03-28  Eric Blake  <ebb9@byu.net>

	Use GNUmakefile module.
	* ltdl/m4/gnulib-cache.m4: Import gnumakefile module.
	* Makefile.am: Split off maintainer rules...
	* maint.mk: ...into this new file.

2008-03-18  Eric Blake  <ebb9@byu.net>

	Stage 20b: make m4wrap obey POSIX fifo ordering.
	Improve input engine to support location changes within symbol
	chains, then convert m4wrap to always build symbol chain.
	Memory impact: none.
	Speed impact: slight penalty, from more m4wrap bookkeeping.
	* m4/m4module.h (m4_wrap_args): Add prototype.
	* m4/m4private.h (enum m4__symbol_chain_type): Add M4__CHAIN_LOC.
	(struct m4__symbol_chain): Add struct u_l.
	* m4/input.c (m4_push_wrapup_init, m4_push_wrapup_finish): Use
	new link type.
	(composite_peek, composite_read, composite_clean): Handle location
	link.
	* m4/macro.c (m4_wrap_args): New function.
	* modules/m4.c (m4wrap): Use it.
	* doc/m4.texinfo (M4wrap): Sync with branch and POSIX.
	(Extensions): Document extension of multiple arguments.
	(Location, Improved m4wrap): Adjust example to match FIFO order.
	* tests/builtins.at (wrap): Likewise.
	* NEWS: Document this change.

2008-03-17  Eric Blake  <ebb9@byu.net>

	Stage 20a: reduce unget's in input engine.
	Now that out-of-range input placeholders like CHAR_BUILTIN are
	consumed outside of next_char, next_token should always consume
	rather than peek at the first character.  Fewer peeks results in
	less ungetc overhead.
	Memory impact: none.
	Speed impact: noticeable improvement, from fewer function calls.
	* m4/input.c (struct input_funcs): Alter read_func prototype.
	(next_char, file_read, buildin_read, string_read, composite_read):
	Add allow_argv parameter.
	(init_builtin_token, init_argv_symbol): Require all prior input to
	be consumed.
	(m4_skip_line, match_input, consume_syntax): Adjust callers.
	(m4__next_token): Consume first byte without peek.

	Update for fresh bootstrap.
	* ltdl/m4/gnulib-cache.m4: Updated copyright from upstream.

2008-03-15  Eric Blake  <ebb9@byu.net>

	Document join, in order to fix bug in m4wrap example.
	* examples/join.m4: New file.
	* examples/wraplifo2.m4: Likewise.
	* Makefile.am (EXTRA_DIST): Add new files.
	* doc/m4.texinfo (Improved m4wrap): New node.
	(Defn, Location): Enhance tests.
	(Shift): Document the composite macro join.
	(Incompatibilities): Move documentation of LIFO vs. FIFO...
	(M4wrap): ...here, to match improved example.

2008-03-13  Eric Blake  <ebb9@byu.net>

	Stage 19c: allow builtin tokens in more macros.
	Allow builtin tokens inside symbol chains, although for now, they
	are not allowed inside comments or quotes.  Enable builtin token
	handling in more macros, if only to consistently diagnose invalid
	macro names.
	Memory impact: none.
	Speed impact: slight impact, due to more bookkeeping.
	* m4/m4module.h (m4_symbol_value_lookup, m4_builtin_print): New
	prototypes.
	* m4/m4private.h (enum m4__symbol_chain_type): Add
	M4__CHAIN_FUNC.
	(struct m4__symbol_chain): Add builtin member.
	* m4/utility.c (m4_symbol_value_lookup): New method.
	* m4/builtin.c (m4_builtin_print): New function.
	* m4/symtab.c (m4_symbol_value_print): Use it.
	* m4/input.c (builtin_print): Likewise.
	(m4__push_symbol): Allow pushing builtin tokens.
	(composite_peek, composite_read, composite_unget, composite_clean)
	(composite_print): Handle builtin tokens.
	(init_builtin_token): Allow builtin tokens from composite input.
	(m4__next_token): Flatten builtins inside comment or string.
	* m4/macro.c (expand_argument): Strengthen assertion.
	(collect_arguments, m4_arg_equal, m4_arg_print, m4_push_args):
	Handle builtin tokens.
	(arg_symbol): Add parameter, and allow NULL level.
	(m4_arg_symbol, m4__push_arg_quote): Adjust callers.
	(m4_arg_text): Ensure all builtins have been flattened.
	* modules/m4.c (defn, dumpdef, popdef, traceoff, traceon)
	(undefine, m4_dump_symbols): Warn on invalid macro names.
	(ifdef, ifelse, shift): Handle builtin tokens.
	* modules/gnu.c (m4symbols): Likewise.
	* doc/m4.texinfo (Defn, Ifdef, Ifelse): Document and test the new
	behavior.
	(Debuglen): Likewise, and remove xfail.
	* NEWS: Mention the change.

	Stage 19b: invert sense of bit for handling builtin tokens.
	Pass builtin tokens by default, rather than as the exception, so
	that the logic can consistently refer to flattening arguments.
	Memory impact: none.
	Speed impact: none.
	* m4/m4module.h (M4BUILTIN_ENTRY): New convenience macro.
	(M4_BUILTIN_GROKS_MACRO): Rename...
	(M4_BUILTIN_FLATTEN_ARGS): ...and invert sense.
	(m4_symbol_value_groks_macro, m4_symbol_groks_macro): Likewise...
	(m4_symbol_value_flatten_args, m4_symbol_flatten_args): ...to
	this.
	* m4/m4private.h (VALUE_MACRO_ARGS_BIT)
	(m4_symbol_value_groks_macro): Likewise...
	(VALUE_FLATTEN_ARGS_BIT, m4_symbol_value_flatten_args): ...to
	this.
	* m4/symtab.c (m4_symbol_value_groks_macro): Likewise...
	(m4_symbol_value_flatten_args): ...to this.
	* m4/macro.c (collect_arguments): Accomodate changed sense.
	* m4/module.c (m4__module_open): Require arguments if flattening
	is requested.
	* m4/input.c (m4_push_string_finish): For now, flatten all
	builtins pushed as back-references.
	* modules/gnu.c (m4_builtin_table, builtin): Adjust all clients.
	* modules/import.c (m4_builtin_table): Likewise.
	* modules/load.c (m4_builtin_table): Likewise.
	* modules/modtest.c (m4_builtin_table): Likewise.
	* modules/mpeval.c (m4_builtin_table): Likewise.
	* modules/perl.c (m4_builtin_table): Likewise.
	* modules/shadow.c (m4_builtin_table): Likewise.
	* modules/stdlib.c (m4_builtin_table): Likewise.
	* modules/time.c (m4_builtin_table): Likewise.
	* modules/m4.c (m4_builtin_table): Likewise.
	(mkstemp): Undo #undef hack from 2006-10-23, now that macro names
	are stringized without preprocessor expansion.
	* doc/m4.texinfo (Defn): Update comments to match reality.
	(Debuglen): Update test now that user macros pass builtin tokens.

	Stage 19a: sort and cache builtins loaded by a module.
	Rather than repeatedly using dlsym to browse the builtin table,
	copy off the table at module load time.  Then, the input engine
	merely refers to the copy instead of duplicating information.
	Memory impact: slight penalty, due to more memory per module, but
	offset by less memory in input engine.
	Speed impact: slight improvement, due to faster builtin	lookups.
	* m4/m4module.h (m4_set_symbol_value_builtin): Delete.  Use
	m4_builtin_find_by_* instead.
	(m4_builtin_find_by_func): Change return type.
	* m4/m4private.h (m4__builtin): New struct.
	(m4_module): Add sorted list of loaded builtins.
	(struct m4_symbol_value): Change type of builtin value.
	(m4__set_symbol_value_builtin): New prototype and fast accessor.
	(m4_get_symbol_value_func, m4_get_symbol_value_builtin): Adjust to
	new field type.
	* m4/symtab.c (m4_set_symbol_value_builtin): Rename...
	(m4__set_symbol_value_builtin): ...and populate additional fields,
	based on new type.
	(m4_get_symbol_value_func, m4_get_symbol_value_builtin): Adjust to
	new field type.
	* m4/module.c (install_builtin_table): Use cached table.
	(compare_builtin_CB): New helper function.
	(m4__module_open): Populate table.
	(module_remove): Free table.
	* m4/builtin.c (compare_builtin_name_CB): New helper function.
	(m4_builtin_find_by_name): Rewrite to use sorted table.
	(m4_builtin_find_by_func): Change return type.
	* m4/input.c (struct m4_input_block): Simplify u_b, since most
	fields can be determined from builtin.
	(builtin_peek, builtin_read, builtin_unget, init_builtin_token)
	(m4__next_token): Alter parsing so that only init_builtin_token
	consumes a builtin.
	(builtin_print, m4_push_builtin): Adjust all users.
	* tests/macros.at (Arity, defn, and freeze): Fix typo.

	Consistently cast malloc results, for C++ compilation.
	* m4/builtin.c (m4_builtin_find_by_name): Add cast.
	* m4/hash.c (m4_hash_new, m4_get_hash_iterator_next, node_new)
	(m4_hash_resize, maybe_grow): Likewise.
	* m4/m4.c (m4_create): Likewise.
	* m4/macro.c (expand_macro): Likewise.
	* m4/output.c (m4_tmpname): Likewise.
	* m4/path.c (search_path_add): Likewise.
	* m4/symtab.c (m4_symtab_create, m4_symbol_value_create)
	(symtab_fetch): Likewise.
	* m4/syntax.c (m4_syntax_create): Likewise.
	* modules/gnu.c (regexp_compile): Likewise.
	* src/main.c (main): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.

2008-03-06  Eric Blake  <ebb9@byu.net>

	Fix nested builtin(`shift',$@) regression from 2008-02-23.
	* m4/macro.c (make_argv_ref): Don't output expansion text when
	making wrapper for builtin or indir.
	* tests/builtins.at (builtin): New test.
	* NEWS: Document the fix.
	Reported by Andreas Schwab.

2008-03-04  Eric Blake  <ebb9@byu.net>

	The gnulib module free was deprecated.
	* ltdl/m4/gnulib-cache.m4: Remove free module.

2008-02-29  Eric Blake  <ebb9@byu.net>

	Import news from 1.4.10b.
	* NEWS: Update from branch.

2008-02-23  Eric Blake  <ebb9@byu.net>

	Stage 18: try harder to reuse argv in recursion.
	When pushing arguments that contain an existing $@ ref, reuse the
	ref rather than creating another layer of wrappers.
	Memory impact: noticeable improvement, due to better $@ reuse.
	Speed impact: noticeable improvement, due to O(n^2) to O(n)
	reduction in unboxed recursion.
	* m4/macro.c (make_argv_ref): Avoid wrapping $@ when possible.
	(m4_push_args): Let make_argv_ref take care of pending data.
	* doc/m4.texinfo (Improved foreach): Tweak wording to match new
	performance capability.
	* tests/others.at (recursion): Add tests to avoid performance
	regression.

2008-02-22  Eric Blake  <ebb9@byu.net>

	Update NEWS.
	* NEWS: Document change to __gnu__ on 2008-02-11.

	Stage 17: pass argv through quoted strings.
	Allow the concatenation of $@ references with other text input
	inside quoted contexts, which requires distinguishing between a
	wrapper around many arguments vs. a reference serving as part of a
	single argument.  Also optimize based on whether argv contains
	builtin tokens that might need flattening to the empty string.
	Memory impact: noticeable improvement, due to O(n^2) to O(n)
	reduction from total reuse of $@ references.
	Speed impact: noticeable improvement, due to O(n^2) to O(n)
	reduction in boxed recursion.
	* m4/m4module.h (m4_arg_equal, m4_arg_len): Add parameter.
	(M4ARGLEN): Adjust definition.
	* m4/m4private.h (struct m4__symbol_chain): Add has_func member.
	(struct m4_symbol_value): Add wrapper and has_func members.
	(struct m4_macro_args): Add flatten and has_func members.
	* m4/input.c (append_quote_token): Return argv refs inside quoted
	strings.
	(init_argv_symbol): Populate new fields.
	* m4/macro.c (expand_argument, collect_arguments, make_argv_ref)
	(m4_make_argv_ref): Likewise.
	(arg_symbol, arg_mark, m4_is_arg_text, m4_is_arg_func): Use new
	fields.
	(m4_arg_equal, m4_arg_len): Handle quoted argv references, and add
	new parameter.
	* modules/m4.c (ifelse): Adjust caller.

2008-02-22  Gary V. Vaughan  <gary@gnu.org>

	Fix regression in argument collection, from 2008-01-21.
	* m4/input.c (m4__next_token): When DEBUG_INPUT is defined,
	undo argument collection optimisation for strings, so that
	m4_print_token doesn't abort when it otherwise receives an
	unprintable M4_SYMBOL_VOID type token.

2008-02-20  Eric Blake  <ebb9@byu.net>

	Stage 16: cache quotes and improve m4_arg_print.
	Cache rather than always copying quotes when pushing $@ refs; in
	particular, reconstruct single-byte quotes on the fly.  Allow NUL
	through m4wrap.  Improve sharing of code that prints arguments.
	Memory impact: slight improvement, due to cached quotes.
	Speed impact: slight improvement, due to less copying.
	* m4/m4module.h (m4_symbol_value_print, m4_symbol_print)
	(m4_arg_print): Adjust prototypes.
	(m4_dump_args): Delete.
	(m4_push_wrapup): Split...
	(m4_push_wrapup_init, m4_push_wrapup_finish): ...into these
	prototypes.
	* m4/m4private.h (struct m4_syntax_table): Add cached_quote
	member.
	(m4__quote_cache, m4__quote_uncache): New prototypes.
	* m4/syntax.c (m4_syntax_create): Initialize the cache.
	(m4__quote_cache): New function.
	(m4_set_syntax): Update caller.
	* m4/symtab.c (m4_symbol_value_print): Add parameter.
	(m4_symbol_print, dump_symbol_CB): Adjust all callers.
	* m4/utility.c (m4_dump_args): Delete; callers should use
	m4_arg_print instead.
	* m4/input.c (m4_push_wrapup_init, m4_push_wrapup_finish): Split
	implementation, and allow embedded NUL.
	(m4_print_token, pop_input, composite_print, composite_peek):
	(composite_read, append_quote_token): Adjust all callers.
	* m4/macro.c (trace_prepre, m4_arg_text, make_argv_ref):
	Likewise.
	(m4_arg_print): Add parameters.
	(trace_pre): Rewrite in terms of m4_arg_print.
	* modules/m4.c (errprint): Likewise.
	(m4wrap): Rewrite to allow embedded NUL.
	(dumpdef): Adjust caller.
	* doc/m4.texinfo (Debuglen): Enhance debuglen test.
	* tests/null.m4: Test for NUL in m4wrap.
	* tests/null.out: Update expected output.

	Fix out-of-bounds read for sanitized macro names, from 2008-02-06.
	* m4/utility.c (m4_verror_at_line): Properly terminate the string.
	Reported by Ralf Wildenhues.

	* doc/m4.texinfo (Debuglen, Changesyntax): Fix typos.

2008-02-19  Eric Blake  <ebb9@byu.net>

	Clean up example on filtering defined symbols.
	* doc/m4.texinfo (Foreach, Improved foreach): Document another
	shortcoming in foreach.m4, and improve filter example by using
	foreach2.m4.

	* src/main.c (usage): Fix typo.

2008-02-18  Eric Blake  <ebb9@byu.net>

	Avoid some magic numbers.
	* m4/m4private.h (CHAR_EOF, CHAR_BUILTIN, CHAR_QUOTE, CHAR_ARGV)
	(CHAR_RETRY): Define in terms of UCHAR_MAX.
	* m4/syntax.c (m4_syntax_create, set_syntax_set)
	(reset_syntax_set, check_is_single_quotes)
	(check_is_single_comments, check_is_macro_escaped)
	(m4_set_quotes, m4_set_comment): Likewise.
	* modules/gnu.c (regexp_compile): Likewise.
	* modules/m4.c (translit): Likewise.
	* src/freeze.c (produce_syntax_dump): Likewise.
	Reported by Ralf Wildenhues.

2008-02-16  Eric Blake  <ebb9@byu.net>

	Add regression test for multi-character quote recursion.
	* examples/foreach2.m4: Use $0 rather than spelling out name.
	* examples/foreachq2.m4: Likewise.
	* examples/forloop2.m4: Likewise.
	* examples/hanoi.m4: Likewise.
	* examples/trace.m4: Likewise.
	* doc/m4.texinfo (Improved forloop): Document advantage of $0.
	(Improved foreach): Adjust dump from file.

	Stage 15: return argv refs back to collect_arguments.
	Collect an entire $@ reference at once rather than one argument at
	a time, outside of quotes (but inside quotes, $@ is still
	flattened for now).  The skip_last field allows concatenation of
	$@ with other text when collecting arguments.
	Memory impact: noticeable improvement, due to better reuse of $@.
	Speed impact: noticeable improvement, due to less parsing.
	* m4/m4private.h (CHAR_ARGV): New input engine sentinel.
	(enum m4__token_type): Add M4_TOKEN_ARGV.
	(struct m4__symbol_chain): Add skip_last member to argv link.
	(m4__next_token): Add parameter.
	* m4/input.c (peek_char, file_peek, builtin_peek, string_peek)
	(composite_peek, m4__next_token): Add new parameter.
	(composite_read, append_quote_token): Support argv in quotes.
	(init_argv_symbol): New function.
	(m4__push_symbol, match_input, consume_syntax)
	(m4__next_token_is_open, m4_print_token): Adjust callers.
	* m4/macro.c (m4_macro_expand_input, m4__arg_adjust_refcount)
	(arg_mark, m4_arg_text, make_argv_ref): Likewise.
	(expand_argument, collect_arguments): Handle new token.
	(arg_symbol): Drill through $@ reference.
	* m4/syntax.c (set_quote_age): Detect disabled comments.
	* m4/symtab.c (dump_symbol_CB) [DEBUG_SYM]: Fix debug code.

2008-02-15  Eric Blake  <ebb9@byu.net>

	* modules/gnu.c (regexp_compile): Use a fastmap for regex speed.

2008-02-13  Eric Blake  <ebb9@byu.net>

	Fix texinfo grammar.
	* doc/m4.texinfo (Eval, Incompatibilities): Use @. after capital.
	(History): Use @: after abbreviations.
	(M4exit): Use correct Latin abbreviation.
	(Dumpdef, Debugmode, Frozen file format 2): Use correct spacing
	between sentences.

2008-02-11  Eric Blake  <ebb9@byu.net>

	Allow builtin text macros to specify number of arguments.
	* m4/m4module.h (struct m4_macro): Add argument limits to builtin
	text macros.
	* m4/module.c (install_macro_table): Allow text macros to warn on
	extra arguments.
	* modules/gnu.c (m4_macro_table): Update all clients.
	* modules/load.c (m4_macro_table): Likewise.
	* modules/mpeval.c (m4_macro_table): Likewise.
	* modules/perl.c (m4_macro_table): Likewise.
	* modules/shadow.c (m4_macro_table): Likewise.
	* modules/traditional.c (m4_macro_table): Likewise.
	* modules/modtest.c (m4_macro_table): Likewise.  Also add text
	macros, for testing this.
	* doc/m4.texinfo (Standard Modules): Update text, and enhance
	test.
	* tests/modules.at (modules: text): New test.

	Fix regression in command line -D option, from 2006-08-25.
	* m4/m4private.h (m4_symbol_value_create): Delete fast accessor.
	* m4/m4module.h: Fix typo.
	* m4/symtab.c (m4_symbol_value_create): Prime the maximum number
	of arguments.
	* tests/macros.at (Command line define): Enhance test.
	* tests/others.at (nul character): Enhance test.
	* tests/null.m4: Likewise.
	* tests/null.out: Likewise.

	Use gnulib's git-merge-changelog driver when available.
	* .gitattributes: Add merge attributes for ChangeLog.
	* bootstrap: Install driver, if not already present.

2008-02-06  Eric Blake  <ebb9@byu.net>

	Fix security hole introduced 2007-11-23.
	* m4/utility.c (m4_verror_at_line): Properly escape macro names.
	* src/main.c (main): Manage quoteargs defaults.
	* doc/m4.texinfo (Indir): Document and test this.

	Using raw strtod is not portable.
	* ltdl/m4/gnulib-cache.m4: Import the strtod module.

2008-02-02  Eric Blake  <ebb9@byu.net>

	Consistently use size_t for number of arguments.
	* m4/m4module.h (m4_builtin_func): Alter prototype.
	(struct m4_builtin): Adjust type of min_args, max_args.
	(M4BUILTIN, M4BUILTIN_HANDLER): Adjust all builtins.
	(m4_bad_argc, m4_dump_args, m4_macro_call, m4_arg_argc)
	(m4_arg_symbol, m4_is_arg_text, m4_is_arg_func, m4_arg_text)
	(m4_arg_equal, m4_arg_empty, m4_arg_len, m4_arg_func)
	(m4_arg_print, m4_push_arg): Adjust all clients.
	* m4/m4private.h (struct m4__symbol_chain, m4_symbol_value)
	(m4_macro_args): Adjust type of various fields.
	(m4__push_arg_quote): Adjust all clients.
	* m4/input.c (m4_pop_wrapup): Likewise.
	* m4/macro.c (m4_macro_call, trace_pre, make_argv_ref)
	(arg_symbol, m4_arg_symbol, m4_is_arg_text, m4_is_arg_func)
	(m4_arg_text, m4_arg_equal, m4_arg_empty, m4_arg_len)
	(m4_arg_func, m4_arg_print, m4_make_argv_ref, m4_push_arg)
	(m4__push_arg_quote, m4_push_args, m4_arg_argc): Likewise.
	* m4/utility.c (m4_bad_argc, m4_dump_args): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.
	* modules/gnu.c (changesyntax): Likewise.
	* modules/m4.c (m4_dump_symbols, undefine, popdef, ifelse, defn)
	(undivert, traceon, traceoff): Likewise.
	* modules/m4.h (m4_dump_symbols_func): Likewise.
	* modules/perl.c (perleval): Likewise.

	Stage 14b: allow pushing argv references.
	Push a $@ reference to the input engine in one go, rather than
	pushing each element.  For now, argument collection still gets one
	argument of a $@ at a time; but the penalties of this patch make
	it easier to manage $@ efficiently in future patches.
	Memory impact: noticeable penalty, due to larger struct and O(n)
	to O(n^2) on unboxed recursion.
	Speed impact: noticeable penalty, due to more bookkeeping.
	* m4/m4private.h (struct m4__symbol_chain): Add comma and quotes
	fields.
	(struct m4_macro_args): Add level field.
	(m4__arg_adjust_refcount, m4__push_arg_quote): New prototypes.
	* m4/input.c (m4__push_symbol, composite_peek, composite_read)
	(composite_unget, composite_clean, composite_print): Support $@
	refs.
	* m4/macro.c (collect_arguments): Populate new field.
	(expand_macro): Move argv cleanup...
	(m4__arg_adjust_refcount): ...to this new function.
	(m4_arg_symbol, m4_make_argv_ref, m4_push_arg): Factor...
	(arg_symbol, make_argv_ref, m4__push_arg_quote): ...to these new
	helper functions, to add parameters.
	(m4_push_args): Adjust caller.
	* m4/symtab.c (m4_symbol_value_print): Likewise.

	Stage 14a: allow printing argv references.
	Refactor symbol-value printing code for better sharing, and to
	allow printing a contiguous text representation of a $@ ref.
	Memory impact: none.
	Speed impact: none.
	* m4/m4module.h (m4_arg_print): New prototype.
	(m4_symbol_value_print): Alter prototype.
	* m4/input.c (struct input_funcs): Add parameter to peek_func.
	(file_peek, builtin_peek, string_peek): Ignore new parameter.
	(composite_peek): Ignore new parameter, for now.
	(composite_clean, pop_input): Rework to minimize indirection, and
	to avoid infinite recursion in next patch.
	* m4/macro.c (trace_prepre, trace_pre): Adjust callers.
	(m4_arg_print): New function.
	* m4/symtab.c (m4_symbol_value_print): Update signature.
	(m4_symbol_print): Update caller.
	* m4/output.c (m4_shipout_string_trunc): Update comments.
	* m4/syntax.c (set_quote_age): Require comma as argument separator
	when dealing with $@ as a unit.
	* tests/builtins.at (ifelse): Augment test.
	* doc/m4.texinfo (Changesyntax): Document changesyntax deficiency.

2008-01-31  Eric Blake  <ebb9@byu.net>

	Kill hack for M4 1.4.4.
	* configure.ac (AM_GNU_GETTEXT_INTL_SUBDIR): Delete, now that
	we require new enough autoconf which in turn requires M4 1.4.5.

2008-01-31  Gary V. Vaughan  <gary@gnu.org>
	and Eric Blake  <ebb9@byu.net>

	Depend on new libtool to use non-recursive build.
	* configure.ac (LT_PREREQ): Bump to alpha release version.
	(LTDL_INIT): Choose nonrecursive mode.  Perform sanity check that
	installed libtool has correct symbols.
	* Makefile.am (SUBDIRS): Drop ltdl, now that it is built from the
	top level.
	(AM_CPPFLAGS): Drop directories covered by libtool.
	(AM_LDFLAGS): Drop -no-undefined, covered by libtool.
	(include_HEADERS, noinst_LTLIBRARIES, EXTRA_LTLIBRARIES): New
	macros, used by libtool.
	(lib_LTLIBRARIES): Also used by libtool.
	(ltdl/libltdlc.la): Delete, now that libtool does this.
	* bootstrap: Mention new requirements.
	(LIBTOOLIZE): Provide default program, and run libtoolize prior to
	autoreconf.
	(autoreconf): Also neutralize libtoolize, since it is run early.
	* HACKING: Mention updated prerequisites.

2008-01-28  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	Fix build failure if installed libltdl is used.
	* Makefile.am (m4_libm4_la_DEPENDENCIES): Use $(LTDLDEPS).

2008-01-28  Eric Blake  <ebb9@byu.net>

	Depend on newer autoconf, for testsuite -C dir.
	* Makefile.am (CD_TESTDIR): Delete, no longer required.
	(check-local, installcheck-local, clean-local-tests): Use new -C
	option from autotest.
	* configure.ac (AC_PREREQ): Bump to 2.61a.347.
	* bootstrap: Mention new dependency.
	* HACKING: Likewise.

2008-01-27  Eric Blake  <ebb9@byu.net>

	Stage 13: push composite text tokens.
	Support pushing composite tokens, allowing back-references to be
	reused through multiple macro expansions.  Add hueristic that
	avoids creating new reference when pushing existing references.
	Memory impact: noticeable improvement due to better reference
	reuse, except for O(n) to O(n^2) copying in boxed recursion.
	Speed impact: slight penalty, due to more bookkeeping.
	* m4/m4private.h (m4__push_symbol): Adjust prototype.
	* m4/input.c (m4__push_symbol): Add parameter, and support
	composite tokens.
	(append_quote_token): Add parameter, and support inlining of short
	text.
	(m4__next_token): Adjust caller.
	* m4/macro.c (m4_push_arg, m4_push_args): Likewise.

2008-01-26  Eric Blake  <ebb9@byu.net>

	Stage 12c: add macro for m4_arg_len.
	Make a common action easier to type.
	Memory impact: none.
	Speed impact: none.
	* m4/m4module.h (M4ARGLEN): New macro.
	* m4/macro.c (process_macro): Adjust all callers.
	* m4/utility.c (m4_dump_args): Likewise.
	* modules/m4.c (divert, maketemp, mkstemp, m4wrap, len, index)
	(substr): Likewise.
	* modules/gnu.c (builtin, indir, mkdtemp, patsubst, regexp)
	(renamesyms): Likewise.
	* modules/stdlib.c (setenv): Likewise.

	Stage 12b: add m4_string_pair.
	Make passing quote delimiters around more efficient.
	Memory impact: none.
	Speed impact: slight penalty, due to more bookkeeping.
	* m4/m4module.h (m4_string_pair): New type.
	(m4_get_syntax_quotes, m4_get_syntax_comments): New prototypes.
	(m4_symbol_value_print, m4_symbol_print, m4_shipout_string_trunc):
	Alter signature.
	* m4/m4private.h (struct m4_string): Delete.
	(struct m4_syntax_table): Combine quote and comment members.
	(m4_get_syntax_lquote, m4_get_syntax_rquote, m4_get_syntax_bcomm)
	(m4_get_syntax_ecomm): Adjust accessors.
	(m4_get_syntax_quotes, m4_get_syntax_comments): New fast
	accessors.
	* m4/symtab.c (m4_symbol_value_print, m4_symbol_print):
	Alter signatures.
	* m4/input.c (string_print, composite_print, m4_input_print):
	All callers updated.
	* m4/syntax.c (m4_syntax_delete, m4_set_syntax)
	(check_is_single_quotes, m4_set_quotes, set_quote_age)
	(m4_get_syntax_lquote, m4_get_syntax_rquote)
	(m4_get_syntax_quotes, check_is_single_comments, m4_set_comment)
	(m4_get_syntax_bcomm, m4_get_syntax_ecomm)
	(m4_get_syntax_comments): Likewise.
	* m4/macro.c (trace_prepre, trace_pre, m4_push_args): Likewise.
	* m4/output.c (m4_shipout_string, m4_shipout_string_trunc):
	Likewise.
	* modules/m4.c (dumpdef, m4_make_temp): Likewise.
	* src/freeze.c (produce_frozen_state): Likewise.
	* tests/freeze.at (reloading unknown builtin): Update test.

	Stage 12a: make m4_symbol_chain a union.
	Shrink size of symbol chains by using a union.
	Memory impact: slight improvement, due to smaller struct.
	Speed impact: slight improvement, due to less bookkeeping.
	* m4/m4private.h (enum m4__symbol_chain_type): New enum.
	(struct m4_symbol_chain): Rename...
	(struct m4__symbol_chain): ...to this, since it is internal.
	* m4/symtab.c (m4_symbol_value_copy, m4_symbol_value_print): All
	callers updated.
	* m4/input.c (struct m4_input_block, m4__push_symbol)
	(composite_peek, composite_read, composite_unget)
	(composite_clean, composite_print, m4__make_text_link)
	(append_quote_token): Likewise.
	* m4/macro.c (expand_macro, arg_mark, m4_arg_symbol, m4_arg_text)
	(m4_arg_equal, m4_arg_len, m4_make_argv_ref, m4_push_arg)
	(m4_push_args): Likewise.

2008-01-23  Eric Blake  <ebb9@byu.net>

	Adjust to recent libtool interface change.
	* configure.ac (LT_PREREQ): Require bleeding-edge libtool.
	(LT_WITH_LTDL): Delete, now that it is obsolete.
	(LTDL_INIT): Use new libtool macro.

2008-01-22  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
	and Eric Blake  <ebb9@byu.net>

	Rely on newer automake.
	* configure.ac (AM_INIT_AUTOMAKE): Require 1.10.1, and add lzma
	distribution.
	* bootstrap: Update automake requirement.
	(func_version): Fix --version output, broken since 2007-08-06.
	* HACKING: Likewise.  Add lzma requirement.
	* Makefile.am (clean-local-src): Not needed any more with newest
	Automake.
	(clean-local): Adjust.
	* TODO: Remove completed item.

2008-01-22  Eric Blake  <ebb9@byu.net>

	Doc tweak.
	* doc/m4.texinfo (Renamesyms): Avoid underfull hbox, and improve
	example.

2008-01-21  Eric Blake  <ebb9@byu.net>

	Stage 11: full circle for single argument references.
	Pass quoted strings through to argument collection in a single
	action, so that an argument can be reused throughout macro
	recursion if it remains unchanged.
	Memory impact: noticeable improvement, due to more reuse in
	argument collection stacks; O(n^2) to O(n) on boxed recursion.
	Speed impact: noticeable improvement, due to less copying.
	* m4/m4module.h (m4_arg_text): Add parameter.
	(M4ARG): Adjust.
	* m4/m4private.h (CHAR_QUOTE): New input engine sentinel.
	(m4__make_text_link): New prototype.
	(struct m4_symbol_chain): Add quote_age member.
	(struct m4_symbol_value): Add end member to chained symbol.
	(struct m4_macro_args): Add wrapper member.
	* m4/symtab.c (m4_symbol_value_print): Print composite tokens.
	(m4_symbol_value_copy, m4_symbol_value_delete): Recognize
	composite tokens.
	* m4/input.c (make_text_link): Rename...
	(m4__make_text_link): ...to this, and export.
	(m4_push_string_finish): Adjust caller.
	(make_text_link, m4__push_symbol): Update new field.
	(file_read, builtin_read, string_read, composite_read, next_char):
	Add parameter.
	(m4_skip_line, match_input, consume_syntax): Adjust callers.
	(append_quote_token): New function.
	(m4__next_token): Pass quoted strings onto argument collection.
	(m4_print_token) [DEBUG_INPUT]: Update.
	* m4/macro.c (expand_argument): Collect composite arguments.
	(collect_arguments): Update new field.
	(expand_macro): Reduce ref-count of back-references after use.
	(arg_mark, m4_arg_symbol, m4_make_argv_ref): Adjust to new member
	names.
	(m4_is_arg_text): Also recognize composite symbols as text.
	(m4_arg_text, m4_arg_len): Merge composite symbols as needed.
	(m4_arg_equal): Compare composite symbols.
	(m4_push_arg, m4_push_args): Handle composite symbols.
	(m4_arg_symbol): Relax assertion.
	(process_macro): Use single-argument references.
	* m4/output.c (m4_shipout_string_trunc): Update comment.
	* tests/macros.at (Rescanning macros): Augment test.

2008-01-16  Eric Blake  <ebb9@byu.net>

	Stage 10: avoid extra copying of strings and comments.
	When collecting tokens that are immune to further expansion, avoid
	copying data from one obstack to another by outputting it into the
	destination obstack to begin with.  Also reduce copying done in
	format builtin.
	Memory impact: slight improvement, due to better obstack usage.
	Speed impact: noticeable improvement, due less data copying.
	* ltdl/m4/gnulib-cache.m4: Import intprops and vasnprintf-posix
	modules.
	* m4/m4private.h (m4__token_type): Adjust prototype.
	* m4/input.c (m4__next_token): Support new parameter.
	* m4/macro.c (m4_macro_expand_input, expand_token)
	(expand_argument, collect_arguments): Adjust callers.
	* modules/m4.c (ntoa): Tighten buffer size.
	* m4/output.c (m4_tmpname): Guarantee no buffer overflow.
	* modules/format.c (arg_int, arg_long, arg_double): New helper
	functions, to detect overflow or unparsed characters.
	(ARG_INT, ARG_LONG, ARG_STR, ARG_DOUBLE): Adjust to check for
	missing or excess arguments.
	(format): Likewise, and also output directly into obstack if there
	is room.
	* doc/m4.texinfo (History): Update for new year.
	(Format): Test for new warnings.

2008-01-15  Eric Blake  <ebb9@byu.net>

	* TODO: Update with some newer URLs.

	Verify linear `index'.
	* tests/builtins.at (index): New test.
	(translit): Make test take longer, to make quadratic algorithms
	more apparent.

2007-12-20  Eric Blake  <ebb9@byu.net>

	Stage 9: share rather than copy single-arg refs.
	Use hooks of previous patch to create back-references to arguments
	in the input engine, and inline short text rather than always
	creating a FIFO link.  Also start testing embedded NUL behavior.
	Until the argument collection engine also shares references, the
	memory usage increases.
	Memory impact: noticeable penalty, due to longer life of argv
	changing O(n) to O(n^2) on boxed recursion.
	Speed impact: slight improvement, due less data copying.
	* ltdl/m4/gnulib-cache.m4: Import memmem and quote modules.
	* m4/m4module.h (m4_arg_scratch): New prototype.
	* m4/m4private.h (m4__push_symbol): Add parameter.
	(m4_arg_scratch): Add fast accessor.
	(struct m4): Add expansion_level member, taken...
	* m4/macro.c (expansion_level): ...from here.  Adjust all users.
	(expand_argument): Minor cleanup.
	(expand_macro): Track scratch space per macro call.
	(m4_arg_scratch): New function.
	(m4_make_argv_ref): Call new function.
	(m4_push_arg): Push reference to $0.
	(m4_push_args): Rework separator usage, since separators will
	usually be inlined.
	(process_macro): Allow embedded NUL.
	* m4/input.c (INPUT_INLINE_THRESHOLD): New define.
	(m4__push_symbol): Add parameter.  Inline short strings, and save
	references through rescanning.
	* m4/symtab.c (m4_set_symbol_value_text): Weaken assertion.
	* modules/m4.c (errprint, index): Handle NUL transparently.
	(dumpdef, translit): Use scratch space, rather than expansion
	stack.
	* modules/gnu.c (renamesyms, m4symbols): Likewise.
	* tests/others.at (nul character): New test.
	(iso8859): Quote absolute file name, remove XFAIL.
	* tests/iso8859.m4: Avoid raw NUL in output.
	* tests/null.m4: New file.
	* tests/null.out: Likewise.
	* tests/null.err: Likewise.
	* Makefile.am (OTHER_FILES): Distribute new files.
	* .gitattributes: Treat new files as text.

2007-12-17  Eric Blake  <ebb9@byu.net>

	Stage 8: extend life of references into argv.
	Add hooks to lengthen the lifetime of arguments reused in a macro
	expansion, rather than always discarding arguments at the end of
	expand_macro.  Rework the expand_macro obstacks to handle longer
	lifetimes.  For now, the hooks remain unused.
	Memory impact: slight penalty, due to larger structs.
	Speed impact: slight penalty, due to more bookkeeping.
	* m4/system_.h (obstack_regrow): Delete.
	* m4/m4private.h (struct m4_symbol_chain): Add level field.
	(m4__push_symbol): Adjust prototype.
	(m4__adjust_refcount): New prototype.
	(DEBUG_MACRO) [DEBUG]: New debug control.
	(struct m4__macro_arg_stacks): New structure.
	(struct m4): Add arg_stacks, stacks_count fields.
	* m4/m4module.h (m4_make_argv_ref): Add parameter.
	* m4/macro.c (argc_stack, argv_stack): Delete, replaced by
	context->arg_stacks.
	(m4_macro_expand_input) [DEBUG_MACRO]: Add debug hooks,
	conditional on M4_DEBUG_MACRO envvar.
	(collect_arguments): Adjust signature.
	(expand_macro): Rework obstack handling.
	(m4__adjust_refcount, arg_mark): New functions.
	(m4_make_argv_ref): Populate new field.
	(m4_push_arg, m4_push_args): Track inuse.
	(process_macro): One less cast.
	* m4/m4.c (m4_delete): Clean up arg_stacks.
	* m4/input.c (make_text_link): Use new field.
	(m4__push_symbol, file_clean): Update signature.
	(composite_read): Bump refcount when done with reference.
	(composite_clean): New function.
	(pop_input): Adjust caller.
	* m4/debug.c (m4_debug_message): Make assertion match comment.
	* modules/gnu.c (builtin, indir): Adjust callers.
	* tests/builtins.at (ifelse): New test.
	(exp): Move and rename...
	* tests/others.at (countdown): ...to this.
	* doc/m4.texinfo (Improved foreach): Fix tracing usage in
	example.

2007-12-13  Eric Blake  <ebb9@byu.net>

	Yet more rewording.
	* doc/m4.texinfo (Inhibiting Invocation): Missed one instance in
	the previous patch.

	* THANKS: Update.

2007-12-13  Paolo Bonzini  <bonzini@gnu.org>  (tiny change)

	* doc/m4.texinfo (Inhibiting Invocation): Fix quoting of a quoting
	example.
	Reported by Giovanni Toffetti.

2007-12-11  Eric Blake  <ebb9@byu.net>

	Stage 7: use chained input support in input parser.
	Allow the LIFO input engine to rescan a macro expansion composed
	of smaller chunks of FIFO data, rather than the old approach of a
	monolithic string.  For now, all chunks are still copied.
	Memory impact: slight penalty, due to FIFO chain overhead.
	Speed impact: slight penalty, due to extra bookkeeping.
	* m4/m4private.h (m4__push_symbol): New prototype.
	(struct m4_symbol_chain): Add const-safety.
	* m4/symtab.c (m4_symbol_value_print): Simplify.
	(dump_symbol_CB): Update caller.
	* m4/input.c (struct m4_input_block): Alter u_c member, first
	introduced 2006-10-25, but unused until now.
	(composite_peek, composite_read, composite_unget)
	(composite_print, init_builtin_token): Rewrite accordingly.
	(m4_push_wrapup): No longer need trailing NUL.
	(m4__push_symbol, make_text_link): New functions.
	(m4_push_string_finish): Use them.
	* m4/macro.c (m4_push_arg, m4_push_args): Likewise.
	(expand_macro): Simplify logic of nesting_limit.
	* src/main.c (main): Likewise.
	* doc/m4.texinfo (Dumpdef): Augment test.

2007-12-08  Eric Blake  <ebb9@byu.net>

	Stage 6: convert builtins to push arg at a time.
	Add new methods to factor all builtins whose expansion includes an
	argument, making back-reference creation easier in future patches.
	Factor out length-limited printing to obstacks, and use -1 rather
	than 0 for unlimited length.
	Memory impact: none.
	Speed impact: slight improvement, due to better code sharing.
	* m4/m4module.h (m4_shipout_text): Rename...
	(m4_divert_text): ...to this, to avoid confusion with m4_shipout_*
	that does not worry about sync lines.
	(m4_shipout_string_trunc): New prototype.
	* m4/output.c (m4_shipout_text): Rename...
	(m4_divert_text): ...to this.
	(m4_shipout_string): Move guts...
	(m4_shipout_string_trunc): ...to this new function.
	* m4/macro.c (m4_push_arg, m4_push_args): New functions.
	(expand_token, process_macro): Update callers.
	* m4/input.c (string_print): Likewise.
	* modules/m4.c (ifdef, ifelse, shift, substr, translit, divert):
	Likewise.
	* modules/gnu.c (patsubst): Likewise.
	(debuglen): Use SIZE_MAX for unlimited debug length.
	* src/main.c (main): Likewise.
	* m4/m4.c (m4_create): Default max_debug_length to SIZE_MAX, not
	zero.

2007-12-07  Eric Blake  <ebb9@byu.net>

	Minor security fix: Quote output of mkstemp.
	* modules/m4.c (m4_make_temp): Produce quoted output.
	* doc/m4.texinfo (Mkstemp, Mkdtemp): Update the documentation and
	tests.

	Stage 5: add notion of quote age.
	Cache the quoting rules that were in effect when a string was
	parsed, to avoid reparsing that string if no changequote or other
	quote age change took place in the meantime.  A quote_age of 0 is
	always safe, but does not benefit from caching.
	Memory impact: slight improvement, due to smaller struct in input
	engine.
	Speed impact: slight penalty, due to more bookkeeping.
	* m4/m4module.h (m4_get_symbol_value_quote_age): New prototype.
	(m4_set_symbol_value_text): Adjust prototype.
	(m4_has_syntax): Factor out the unsigned char cast.
	* m4/m4private.h (struct m4_syntax_table): Add syntax_age and
	quote_age members.
	(m4__quote_age, m4__safe_quotes): New accessor macros, no need for
	functions at this point.
	(struct m4_symbol_value, struct m4_macro_args): Add quote_age
	member.
	(m4_set_symbol_value_text): Adjust fast accessor.
	(m4_get_symbol_value_quote_age): New fast accessor.
	* m4/symtab.c (m4_set_symbol_value_text): Add parameter.
	(m4_get_symbol_value_quote_age): New function.
	(m4_symbol_value_copy): Adjust callers.
	* m4/macro.c (expand_token): Add parameter, and track quote age.
	(expand_argument, collect_arguments): Track quote age.
	(m4_macro_expand_input, process_macro, m4_make_argv_ref)
	(m4_macro_expand_input): Update callers.
	(m4_arg_text, m4_arg_len, m4_arg_func): Abort on type mismatch.
	* m4/input.c: Comment cleanups.
	(struct m4_input_block): Reduce size.
	(m4__next_token): Report quote age.
	(m4_push_builtin, init_builtin_token): Update callers.
	* m4/utility.c (skip_space): Adjust callers.
	* m4/module.c (install_macro_table): Likewise.
	* m4/syntax.c (m4_set_syntax): Initialize and update quote age.
	(m4_set_quotes, m4_set_comment): Detect no-op changes, and update
	quote age.
	(set_quote_age): New helper function.
	(check_is_single_quotes, check_is_single_comments): Adjust
	callers.
	* src/freeze.c (reload_frozen_state): Likewise.
	* src/main.c (main): Likewise.
	* modules/m4.c (define, pushdef): No need to set macro text.
	* tests/builtins.at (changequote, defn): New tests.
	* examples/wrapfifo.m4: New file.
	* examples/wraplifo.m4: New file.
	* Makefile.am (dist_pkgdata_DATA): Distribute new examples.

2007-12-04  Eric Blake  <ebb9@byu.net>

	Fix builds with OpenBSD make.
	* Makefile.am (HELP2MAN): New macro.
	(dist_man_MANS, doc/m4.1): Fix rules for building m4.1 into
	srcdir.
	* README: Update copyright.
	* HACKING: Mention help2man and makeinfo dependencies.

2007-11-29  Eric Blake  <ebb9@byu.net>

	Stage 4: route indir, builtin through ref; make argv opaque.
	Finish making struct opaque to all but the input engine, by
	reworking obstack usage in expand_macro to better support creation
	of a $@ reference.  Canonicalize the empty argument, to allow
	pointer comparison optimizations.
	Memory impact: slight penalty, due to larger struct.
	Speed impact: slight improvement, due to fewer function calls.
	* m4/system_.h (obstack_regrow): Fix precedence.
	* m4/m4module.h (m4_arg_equal, m4_arg_empty, m4_make_argv_ref):
	New prototypes.
	(struct m4_macro_args): Move...
	* m4/m4private.h (struct m4_macro_args): ...here, making it opaque
	to modules.  Add has_ref member.
	(bool_bitfield): New helper typedef.
	(struct m4_symbol_chain): Add flatten and len members.
	* m4/macro.c (empty_symbol): New placeholder, for optimizing
	comparison with empty string.
	(m4_macro_expand_input): Initialize it.
	(collect_arguments): Alter signature, and populate new fields.
	(trace_pre, trace_post): Remove redundant parameter.
	(expand_macro): Alter handling of obstacks.
	(m4_arg_symbol): Account for wrapped argv.
	(m4_arg_equal, m4_arg_empty, m4_make_argv_ref): New methods.
	(m4_arg_text, m4_arg_len, m4_arg_func): Use new methods.
	* modules/m4.c (ifelse, syscmd): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.
	(undefine, popdef, m4_dump_symbols): Optimize.
	* modules/gnu.c (builtin, indir, esyscmd, debugfile): Use new
	methods.
	(changesyntax, regexp): Optimize.
	* m4/output.c (diversion_storage): Use typedef.

	Stage 3b: cache length, rather than computing it, in modules.
	Use cached token length in builtins and output engine.
	Memory impact: none.
	Speed impact: noticeable improvement, due to fewer function calls.
	* m4/hash.c (m4_hash_remove): Avoid double free on remove
	failure.
	* m4/output.c (m4_shipout_string): Change semantics of len param.
	(m4_shipout_int): Use cached length.
	* m4/input.c (m4_push_string_finish): Likewise.
	* modules/m4.h (m4_make_temp_func): Add parameter.
	* m4/macro.c (expand_token, m4_arg_len): Use cached length.
	(collect_arguments, expand_macro): Alter signature.
	(trace_format): Don't use out-of-scope buffer.
	(process_macro): All callers changed.
	* m4/utility.c (m4_dump_args): Likewise.
	* m4/symtab.c (m4_symbol_value_print): Likewise.
	* modules/gnu.c (__file__, __program__, builtin, indir)
	(m4symbols, mkdtemp, regexp_compile, regexp_substitute,
	renamesyms, patsubst, regexp, regexp_compile): Likewise.
	* modules/load.c (m4modules): Likewise.
	* modules/m4.c (defn, m4wrap, maketemp, m4_make_temp)
	(numb_obstack, ifdef, ifelse, divert, len, substr): Likewise.
	* modules/perl.c (perleval): Likewise.
	* modules/stdlib.c (getcwd, getenv, getlogin, getpwnam, getpwuid)
	(hostname, uname, setenv): Likewise.
	* modules/mpeval.c (numb_obstack): Likewise.
	* src/freeze.c (dump_symbol_CB): Likewise.
	* doc/m4.texinfo (Renamesyms, Dumpdef, Changesyntax): Adjust test.
	* tests/builtins.at (mkstemp): Likewise.
	* tests/others.at (iso8859): XFAIL this test, now that
	length-based handling allows NUL through part but not all of M4.

2007-11-28  Eric Blake  <ebb9@byu.net>

	Stage 3a: cache length, rather than computing it, in libm4.
	Cache the length of a token in the input engine and symbol table,
	to avoid repeating lots of strlen calls.  Additionally, by using
	obstack length rather than strlen, the input engine can now
	support embedded NUL.
	Memory impact: slight penalty, due to larger struct.
	Speed impact: slight improvement, due to fewer function calls.
	* m4/m4module.h (struct m4_macro_args): Cache length.
	(m4_get_symbol_len, m4_get_symbol_value_len): New accessors.
	(m4_set_symbol_value_text): Change signature.
	* m4/m4private.h (struct m4_symbol_value): Store string length.
	(m4_get_symbol_value_text, m4_get_symbol_value_placeholder)
	(m4_set_symbol_value_placeholder): Update accordingly.
	(m4_set_symbol_value_text): Change signature.
	(m4_get_symbol_value_len): New accessor.
	* m4/input.c (struct m4_input_block, string_peek, string_read)
	(string_unget, string_print, m4_push_string_finish)
	(m4_push_wrapup): Track length of string input.
	(m4__next_token): Adjust all users of symbol text to track length,
	too.
	* m4/macro.c (expand_argument, collect_arguments): Likewise.
	* m4/module.c (install_macro_table): Likewise.
	* modules/gnu.c (builtin, indir): Likewise.
	* modules/m4.c (define, pushdef): Likewise.
	* src/main.c (main): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* m4/symtab.c (m4_symbol_value_copy): Likewise.
	(m4_get_symbol_value_len): New function.
	(m4_get_symbol_value_text, m4_get_symbol_value_placeholder)
	(m4_set_symbol_value_text, m4_set_symbol_value_placeholder):
	Adjust implementation.

2007-11-27  Eric Blake  <ebb9@byu.net>

	Stage 2: use accessors, not direct reference, into argv.
	Outside of macro.c, use accessor methods rather than direct access
	into the argv struct.
	Memory impact: none.
	Speed impact: slight penalty, due to increased function calls.
	* m4/m4private.h (m4_arg_argc): New fast accessor.
	* m4/m4module.h (m4_arg_argc, m4_arg_symbol, m4_is_arg_text)
	(m4_is_arg_func, m4_arg_text, m4_arg_len, m4_arg_func): New
	prototypes.
	(m4_builtin_func, M4BUILTIN, M4BUILTIN_HANDLER, m4_dump_args)
	(m4_macro_call): Make argc unsigned.
	(M4ARG): Use new accessors.
	* modules/m4.c (define, pushdef): Likewise.
	(undefine, popdef, ifelse, m4_dump_symbols, defn, undivert)
	(traceon, traceoff): Make argc unsigned.
	* modules/m4.h (m4_dump_symbols_func): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.
	* modules/gnu.c (builtin, indir): Use new accessors.
	(changesyntax): Make argc unsigned.
	* modules/perl.c (perleval): Likewise.
	* m4/utility.c (m4_dump_args): Use new accessors.
	* m4/macro.c (trace_pre): Likewise.
	(m4_arg_symbol, m4_arg_argc, m4_is_arg_text, m4_is_arg_func)
	(m4_arg_text, m4_arg_len, m4_arg_func): New functions.
	(expand_macro, trace_pre, trace_post, m4_macro_call): Update argc
	usage.

2007-11-24  Eric Blake  <ebb9@byu.net>

	Stage 1: convert m4_symbol_value** into new object.
	Pass a variable-size wrapper structure instead of an array to
	builtins, so that subsequent optimizations in the structure need
	not impact every builtin client.
	Memory impact: slight penalty, since struct is larger than array.
	Speed impact: slight penalty, due to increased bookkeeping.
	* ltdl/m4/gnulib-cache.m4: Import flexmember module.
	* m4/m4module.h (m4_macro_args): New type, will be opaque to
	modules later.
	(m4_builtin_func, M4BUILTIN, M4BUILTIN_HANDLER, m4_dump_args)
	(m4_macro_call): Alter signature to use m4_macro_args object.
	(M4ARG): Redefine to access new struct.
	* m4/m4private.h (M4_SYMBOL_COMP): New enumerator.
	(struct m4_symbol_chain): New type.
	(struct m4_symbol_value): Add chain alternative.
	* m4/macro.c (collect_arguments): Build new struct.
	(expand_macro, m4_macro_call, process_macro, trace_pre)
	(trace_post): Adjust implementation to use it.
	* m4/utility.c (m4_dump_args): Likewise.
	* modules/gnu.c (builtin, indir): Likewise.
	* modules/format.c (format): Likewise.
	* modules/m4.h (m4_dump_symbols_func): Likewise.
	* modules/m4.c (m4_dump_symbols, define, pushdef, defn, ifelse)
	(shift, include, errprint, m4wrap): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.

	Pass only macro name to utility functions.
	* m4/m4module.h (m4_bad_argc, m4_numeric_arg): Adjust signature.
	* m4/utility.c (m4_bad_argc, m4_numeric_arg): Adjust
	implementation.
	* m4/macro.c (m4_macro_call): Adjust callers.
	* modules/gnu.c (builtin, debuglen): Likewise.
	* modules/m4.c (ifelse, incr, decr, divert, undivert, m4exit)
	(substr): Likewise.
	* modules/evalparse.c (m4_evaluate): Likewise.
	* modules/stdlib.c (setenv, getpwuid, srand): Likewise.
	* modules/time.c (ctime, gmtime, localtime, mktime, strftime):
	Likewise.

2007-11-23  Eric Blake  <ebb9@byu.net>

	Add macro name to debugfile messages.
	* m4/m4module.h (m4_debug_set_output): Add parameter.
	* m4/debug.c (m4_debug_set_output, set_debug_file): Pass macro
	name through.
	* modules/gnu.c (debugfile): Adjust caller.
	* modules/m4.c (m4exit): Likewise.
	* src/main.c (main): Likewise.

	Factor out handling of macro name in error messages.
	* m4/m4module.h (m4_error, m4_error_at_line, m4_warn)
	(m4_warn_at_line): Add new parameter.
	* m4/utility.c (m4_verror_at_line): New helper method.
	(m4_error, m4_error_at_line, m4_warn, m4_warn_at_line): Add new
	parameter.
	(m4_bad_argc, m4_numeric_arg, m4_parse_truth_arg): All callers
	changed.
	* m4/debug.c: Likewise.
	* m4/input.c: Likewise.
	* m4/macro.c: Likewise.
	* m4/module.c: Likewise.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* modules/evalparse.c: Likewise.
	* modules/format.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/mpeval.c: Likewise.
	* src/freeze.c: Likewise.
	* src/main.c: Likewise.

2007-11-14  Eric Blake  <ebb9@byu.net>

	Handle some defn corner cases differently.
	* doc/m4.texinfo (Defn): Update documentation; although this still
	doesn't match the branch, since it may be changed before 2.0.
	* m4/macro.c (expand_argument): Consistently ignore builtins in
	concatenation contexts.
	* m4/m4private.h (m4__symbol_type): Fix C89 compliance bug.

2007-11-13  Eric Blake  <ebb9@byu.net>

	Note: Patches titled Stage 0 through N form a series of patches
	which decreases the algorithmic complexity of tail recursion in
	macro expansions from O(n^2) to O(n) in both time and memory, then
	performs cleanups, such as handling of embedded NUL, made easier
	by the code refactoring.

	Stage 0: Fix memory leak in tail recursion.
	Free expansion text in the input engine as soon as it is parsed,
	rather than when the recursive expansion completes.
	Memory impact: noticeable improvement, due to reduction from
	O(n^2) to O(n) on recursion.
	Speed impact: minor improvement, due to better memory usage.
	* m4/input.c (pop_input): Add flag parameter and return type.
	(next_char): Adjust caller.
	(m4_push_string_init): Let go of memory earlier.

2007-11-07  Eric Blake  <ebb9@byu.net>

	* tests/macros.at (Rescanning macros): Test more corner cases.

2007-11-06  Eric Blake  <ebb9@byu.net>

	* build-aux/mkstamp: Rename from ltdl/config/mkstamp.

	* Makefile.am (tests/package.m4): Work around bash bug.
	Reported by Ralf Wildenhues.

2007-11-05  Eric Blake  <ebb9@byu.net>

	For consistency with other GNU projects, use build-aux directory.
	* configure.ac (AC_CONFIG_AUX_DIR): Change ltdl/config to
	build-aux.
	* bootstrap (config_aux_dir): Likewise.
	* Makefile.am (config_aux_dir): Likewise.
	* ltdl/m4/gnulib-cache.m4: Use --aux-dir option.

2007-11-02  Eric Blake  <ebb9@byu.net>

	Update some documentation about version control.
	* NEWS: M4 is now stored in git.
	* HACKING: Likewise.
	* README: Likewise.
	* bootstrap: Likewise.
	* commit: Delete, now that CVS commits are no longer necessary.
	* ltdl/config/mailnotify: No longer necessary; git's patch
	generation and mail capability is more powerful.

	Update to recent gnulib changes.
	* ltdl/m4/gnulib-cache.m4: Replace fprintf-posix, vasprintf-posix,
	xprintf, and xvasprintf with xprintf-posix and xvasprintf-posix.

2007-11-01  Eric Blake  <ebb9@byu.net>

	Improve error message when early end of file occurs.
	* doc/m4.texinfo (Macro Arguments, Changequote, Changecom)
	(M4wrap): Adjust to new messages.
	(Improved capitalize): Enhance test.
	* m4/m4private.h (m4__next_token): Adjust prototype.
	* m4/input.c (m4__next_token): Add new parameter, and improve
	error message.
	* m4/macro.c (m4_macro_expand_input, collect_arguments): Adjust
	callers.
	(expand_argument): Likewise, and add parameter.

2007-10-31  Eric Blake  <ebb9@byu.net>

	Test more corner cases.
	* tests/macros.at (Rescanning macros): Beef up test.
	* doc/m4.texinfo (Changecom): Beef up test.
	(Improved foreach): Document alternate foreachq style.
	* examples/foreachq3.m4: New file.
	* examples/loop.m4: New file.
	* Makefile.am (dist_pkgdata_DATA): Distribute them.

2007-10-28  Eric Blake  <ebb9@byu.net>

	More test coverage for autoconf usage patterns.
	* doc/m4.texinfo (Shift): Document cond macro, and add new test.
	* tests/macros.at (Rescanning macros): New test.
	* tests/builtins.at (include): Augment test.

2007-10-28  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* Makefile.am: Adjust getopt handling to latest gnulib layout.

2007-10-27  Eric Blake  <ebb9@byu.net>

	Document one use of changequote(`(',`)').
	* doc/m4.texinfo (Changequote): Add new test, based on recent
	autoconf addition of m4_expand.

2007-10-24  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* Makefile.am (dist_pkgdata_DATA): Add examples/capitalize2.m4.

2007-10-22  Eric Blake  <ebb9@byu.net>

	Never let printf failures go undetected.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	xprintf'.
	* m4/system_.h: Include xprintf.h.
	* m4/debug.c (m4_debug_message_prefix, m4_debug_message): Wrap all
	use of printf, xprintf.
	* m4/input.c [DEBUG_INPUT]: Likewise.
	* m4/module.c [DEBUG_MODULES]: Likewise.
	* m4/output.c (m4_shipout_text, m4_shipout_int)
	(m4_freeze_diversions): Likewise.
	* m4/path.c [DEBUG_INCL]: Likewise.
	* m4/symtab.c [DEBUG_SYM]: Likewise.
	* m4/syntax.c [DEBUG_SYNTAX]: Likewise.
	* modules/modtest.c (export_test): Likewise.
	* src/freeze.c (produce_resyntax_dump, produce_syntax_dump)
	(produce_module_dump, dump_symbol_CB, produce_frozen_state):
	Likewise.
	* src/main.c (usage): Likewise.
	* po/POTFILES.in: Adjust to new file.
	* po/Makevars (XGETTEXT_OPTIONS): Likewise.

2007-10-18  Eric Blake  <ebb9@byu.net>

	Fix 'm4 -F file -t undefined'.
	* src/freeze.c (produce_symbol_dump): Skip trace placeholders.
	* src/freeze.c (dump_symbol_CB): Also skip void symbols.
	* tests/freeze.at (reloading unknown builtin): Test for this bug.
	* m4/m4module.h (m4_symtab_apply): Add parameter.
	* m4/symtab.c (m4_symtab_apply): Ignore trace placeholders when
	requested.
	(m4_symtab_delete, symtab_dump): Adjust callers.
	* modules/m4.c (m4_dump_symbols): Likewise.

2007-10-09  Eric Blake  <ebb9@byu.net>

	Fix regexp regression of 2007-09-29.
	* modules/gnu.c (substitute): Allow NULL buf when no
	subexpressions were present.
	(regexp): Handle \ escapes even with empty regex.
	* doc/m4.texinfo (Regexp, Patsubst): Catch this bug.

	Cache regex compilation for another autoconf speedup.
	* modules/gnu.c	(gnu_buf): Replace...
	(REGEX_CACHE_SIZE, regex_cache): ...with new declarations.
	(m4_pattern_buffer): Add fields.
	(m4_regexp_compile): Rename...
	(regexp_compile): ...to this, and drop no_sub parameter.
	Implement caching.
	(M4FINISH_HANDLER): Clean up entire cache.
	(m4_regexp_search): Rename...
	(regex_search): ...to this, adjust to new struct contents, and add
	no_sub parameter.
	(m4_regexp_substitute): Rename...
	(regexp_substitute): ...to this.
	(substitute, patsubst, regexp, renamesyms): Adjust callers.

2007-10-02  Eric Blake  <ebb9@byu.net>

	Document quoting pitfalls in capitalize.
	* doc/m4.texinfo (Patsubst): Use the examples directory.  Also
	document shortfall.
	(Improved capitalize): New node.
	* examples/capitalize.m4: Update to match manual.
	* examples/capitalize2.m4: New file.

2007-10-01  Eric Blake  <ebb9@byu.net>

	Another Autoconf usage pattern optimization.
	* modules/m4.c (m4_index): Optimize search for one byte.
	* doc/m4.texinfo (Index macro, Regexp, Patsubst): Test the new
	code paths.

2007-09-29  Eric Blake  <ebb9@byu.net>

	Optimize for Autoconf usage pattern.
	* modules/gnu.c (regexp, patsubst): Handle empty regex faster.

	* tests/testsuite.at (AT_CHECK_M4): Slight optimization.

2007-09-24  Eric Blake  <ebb9@byu.net>

	Create .gitignore alongside .cvsignore.
	* bootstrap (version control): Update to reflect git usage.

2007-09-13  Eric Blake  <ebb9@byu.net>

	* AUTHORS: Fix typo.

2007-09-12  Gary V. Vaughan  <gary@gnu.org>

	Be consistent about using 'module' for m4_module types and
	'handle' for lt_dlhandle types:

	* m4/m4private.h (m4_symbol_value): Rename handle element to
	method.  Changed all references.
	(VALUE_MODULE, SYMBOL_MODULE): Renamed from VALUE_HANDLE and
	SYMBOL_HANDLE respectively.  Changed all references.
	* m4/m4module.h (M4INIT_HANDLER, M4FINISH_HANDLER): Ditto.
	* m4/builtin.c (m4_builtin_find_by_name)
	(m4_builtin_find_by_func): Use module as the parameter name for
	pointers of type 'm4_module'.
	* m4/module.c (module_remove, m4_get_module_name)
	(install_builtin_table, install_macro_table)
	(m4_module_make_resident, m4__module_next, m4_module_refcount):
	Ditto.
	* src/freeze.c (produce_module_dump): Ditto.
	* m4/input.c (m4_input_block): Rename handle element to method.
	Changed all references.
	* m4/symtab.c (m4__symtab_remove_module_references): Ditto.
	* modules/load.c: Use module as the variable name for pointers
	of type 'm4_module'.
	* modules/m4.c: Ditto.
	* modules/perl.c: Ditto.
	* modules/shadow.c: Ditto.

2007-09-07  Eric Blake  <ebb9@byu.net>

	Add refcount builtin.
	* modules/load.c (refcount): New builtin.
	(m4modules): Use correct type.
	* doc/m4.texinfo (Refcount): New section.
	* m4/m4private.h (struct m4_module): Add refcount member.
	(m4_module_refcount) [NDEBUG]: Add faster accessor macro.
	* m4/module.c (m4_module_load): Add symbols to table on first
	load by m4, regardless of other libltdl loads of same module.
	(m4_module_refcount): Use new struct member, rather than relying
	on libltdl count which might be inflated by unrelated loads.
	(m4__module_interface): Optimize.
	(m4__module_next, m4__module_find): Avoid assertions that could
	trigger with unrelated libltdl loads.
	(m4__module_open): Track m4 load count.
	(m4__module_exit): Only unload what m4 loaded.
	(module_remove): Track m4 unloads.
	* NEWS: Document new builtin.

	More conversion to m4_module*.
	* src/freeze.c (produce_module_dump, dump_symbol_CB)
	(reload_frozen_state): Use correct type.
	* m4/input.c (struct m4_input_block): Likewise.
	* m4/symtab.c (dump_symbol_CB): Likewise.

	* AUTHORS: Simplify, to match libtool and autoconf layout.
	* THANKS: Sync with branch.

2007-09-06  Eric Blake  <ebb9@byu.net>

	Wrap lt_dlhandle in struct m4_module.
	* m4/m4module.h (includes): No longer require clients to know
	about lt_dlhandle.
	(m4_module): New opaque declaration.
	(m4_export): Delete unused type.
	(M4INIT_HANDLER, M4FINISH_HANDLER, m4_module_init_func)
	(m4_module_finish_func, m4_module_load, m4_get_module_name)
	(m4_builtin_find_by_name, m4_builtin_find_by_func): Use new
	wrapper.
	(m4_module_makeresident, m4_module_refcount): New declarations.
	* m4/m4private.h (includes): Move <ltdl.h> here.
	(m4_module): New declaration.  Simple for now, but intended for
	growth.
	(m4__module_open, m4__module_next, m4__module_find)
	(m4__symtab_remove_module_references): Use new wrapper.
	* m4/builtin.c (m4_builtin_find_by_name, m4_builtin_find_by_func):
	Likewise.
	* m4/module.c (m4_get_module_name, m4_module_import)
	(m4_module_load): Likewise.
	(install_builtin_table, install_macro_table): Likewise.  Also,
	change return type since these always returned NULL and no one
	used the result.
	(m4_module_makeresident, m4_module_refcount): New functions.
	(m4_module_unload, m4__module_next, m4__module_find): Use new
	wrapper.
	(m4__module_open): Populate new wrapper, and associate it with the
	lt_dlhandle.
	(m4__module_exit): Use new wrapper.
	(module_remove): Likewise.  Reclaim storage on last use.
	(module_close): Delete, and inline into module_remove.
	* m4/symtab.c (m4__symtab_remove_module_references): Use new
	wrapper.
	* modules/load.c (load_init): Use new API.
	* modules/m4.c (m4_export_table): Kill unused declaration.
	(m4_init): Use new API.
	* modules/shadow.c (shadow_init): Use new API.
	* src/main.c (main): Adjust callers.
	* src/freeze.c (reload_frozen_state): Likewise.
	* tests/modules.at (unload load module): New test.

2007-09-03  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap (ltdl/m4/.cvsignore): Add xstrtol module macros.
	* src/m4/.cvsignore: Add xstrtol module sources.

2007-09-03  Gary V. Vaughan  <gary@gnu.org>

	Work around a bug in darwin's awk:

	* bootstrap (func_get_translations): Use $AWK instead of raw
	`awk' so that the user can use an alternative implementation
	if the first awk in PATH doesn't behave as expected.
	(func_get_translations): The first awk script mangles the last
	entry passed to it for at least the awk implementation shipped
	with Darwin 8.10.1.  Capture $3 into a variable too to work-
	around that problem.

2007-08-29  Gary V. Vaughan  <gary@gnu.org>

	As gnulib xstrtol is only used by main, and unconditionally pulls
	in a copy of getopt, undo bootstrap change from 2007-08-11 below,
	and copy the xstrtol code into src/ so that main() can use it
	without pushing the extra code into libm4:

	* bootstrap (src_modules): Add getopt and xstrtol modules.
	* Makefile.am (src_m4_SOURCES): Add xstrtol sources.
	* po/POTFILES.in: Move gnu/xstrtol-error.c to src/xstrtol-error.c.

2007-08-11  Eric Blake  <ebb9@byu.net>

	Another upstream xstrtol change.
	* po/POTFILES.in: Track changes in files containing messages.
	* bootstrap (src_modules): getopt is now pulled into libgnu.a, no
	need to grab it separately.
	* src/main.c (OPT_STR, LONG_OPT_STR, short_opt_str, OPT_STR_INIT):
	No longer needed.
	(size_opt): Adjust to latest xstrtol interface.

2007-08-10  Eric Blake  <ebb9@byu.net>

	Documentation improvements.
	* doc/m4.texinfo (Defn): Resync with branch.
	(Compatibility, Extensions): Sync with branch.

2007-08-07  Eric Blake  <ebb9@byu.net>

	Adjust to gnulib xstrtol changes.
	* src/main.c (size_opt): Adjust signature, so that error strings
	are easier to translate.
	(OPT_STR, LONG_OPT_STR, short_opt_str, OPT_STR_INIT): New macros
	for tracking long options.
	(main): Track which long option was used.
	* tests/options.at (--debuglen, --nesting-limit): Adjust to change
	in error message.
	(deprecated options): Test that --arglength spelling shows up in
	error message.

2007-08-06  Eric Blake  <ebb9@byu.net>

	Normalize all GPL license notices.
	* m4/COPYING.LIB: Delete - libm4 is not distributed under LGPLv2
	at this time.
	* Makefile.am: Update license wording.
	* bootstrap: Likewise.
	* commit: Likewise.
	* configure.ac: Likewise.
	* ltdl/config/mailnotify: Likewise.
	* ltdl/config/mkstamp: Likewise.
	* ltdl/m4/debug.m4: Likewise.
	* ltdl/m4/gmp.m4: Likewise.
	* ltdl/m4/m4-error.m4: Likewise.
	* ltdl/m4/m4-getopt.m4: Likewise.
	* ltdl/m4/m4-gettext.m4: Likewise.
	* ltdl/m4/m4-obstack.m4: Likewise.
	* ltdl/m4/m4-regex.m4: Likewise.
	* ltdl/m4/stackovf.m4: Likewise.
	* m4/builtin.c: Likewise.
	* m4/debug.c: Likewise.
	* m4/hash.c: Likewise.
	* m4/hash.h: Likewise.
	* m4/input.c: Likewise.
	* m4/m4.c: Likewise.
	* m4/m4module.h: Likewise.
	* m4/m4private.h: Likewise.
	* m4/macro.c: Likewise.
	* m4/module.c: Likewise.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* m4/resyntax.c: Likewise.
	* m4/symtab.c: Likewise.
	* m4/syntax.c: Likewise.
	* m4/system_.h: Likewise.
	* m4/utility.c: Likewise.
	* modules/evalparse.c: Likewise.
	* modules/format.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/import.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/m4.h: Likewise.
	* modules/modtest.c: Likewise.
	* modules/mpeval.c: Likewise.
	* modules/perl.c: Likewise.
	* modules/shadow.c: Likewise.
	* modules/stdlib.c: Likewise.
	* modules/time.c: Likewise.
	* modules/traditional.c: Likewise.
	* po/Makevars: Likewise.
	* src/freeze.c: Likewise.
	* src/m4.h: Likewise.
	* src/main.c: Likewise.
	* src/stackovf.c: Likewise.
	* tests/builtins.at: Likewise.
	* tests/freeze.at: Likewise.
	* tests/generate.awk: Likewise.
	* tests/m4.in: Likewise.
	* tests/macros.at: Likewise.
	* tests/modules.at: Likewise.
	* tests/options.at: Likewise.
	* tests/others.at: Likewise.
	* tests/stackovf.test: Likewise.
	* tests/testsuite.at: Likewise.

2007-07-22  Eric Blake  <ebb9@byu.net>

	Fix diversions on NetBSD, when fopen(name,"a+") seeks to end.
	* m4/output.c (m4_tmpopen): Explicitly seek to beginning.
	* tests/builtins.at (divert): Enhance test to cover this.
	* THANKS: Update.
	Reported by Thomas Klausner.

2007-07-20  Eric Blake  <ebb9@byu.net>

	Fix 'make distcheck' issues.
	* bootstrap: Add more files that might be more up-to-date in
	gnulib.
	* Makefile.am (EXTRA_DIST): No longer distribute removed diff.
	* config/m4/gnulib-cache.m4: Update to latest gnulib.

2007-07-16  Eric Blake  <ebb9@byu.net>

	* po/POTFILES.in: Track recent translation additions from gnulib
	updates.

2007-07-14  Eric Blake  <ebb9@byu.net>

	Reflect upstream license .texi changes.
	* doc/m4.texinfo (Copying): Rename node...
	(GNU General Public License): ...to this.
	(GNU Free Documentation License): Adjust node location.
	* local/doc/gpl-3.0.texi.diff: Remove file.

2007-07-10  Eric Blake  <ebb9@byu.net>

	Upgrade to GPLv3, and document 1.4.10.
	* bootstrap: Adjust to GPLv3.
	(func_update): Port from branch.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool
	--local-dir=local --import gpl-3.0'.
	* doc/m4.texinfo (History): Mention 1.4.11.
	(Copying This Package): New appendix.
	* NEWS: Document 1.4.10.
	* local/doc/gpl-3.0.texi.diff: New file.
	* Makefile.am: Update license.
	(doc_m4_TEXINFOS, EXTRA_DIST): Distribute additions.
	* commit: Update license.
	* configure.ac: Likewise.
	* ltdl/config/mailnotify: Likewise.
	* ltdl/config/mkstamp: Likewise.
	* ltdl/m4/debug.m4: Likewise.
	* ltdl/m4/gmp.m4: Likewise.
	* ltdl/m4/m4-error.m4: Likewise.
	* ltdl/m4/m4-getopt.m4: Likewise.
	* ltdl/m4/m4-gettext.m4: Likewise.
	* ltdl/m4/m4-obstack.m4: Likewise.
	* ltdl/m4/m4-regex.m4: Likewise.
	* ltdl/m4/stackovf.m4: Likewise.
	* m4/builtin.c: Likewise.
	* m4/debug.c: Likewise.
	* m4/hash.c: Likewise.
	* m4/hash.h: Likewise.
	* m4/input.c: Likewise.
	* m4/m4.c: Likewise.
	* m4/m4module.h: Likewise.
	* m4/m4private.h: Likewise.
	* m4/macro.c: Likewise.
	* m4/module.c: Likewise.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* m4/resyntax.c: Likewise.
	* m4/symtab.c: Likewise.
	* m4/syntax.c: Likewise.
	* m4/system_.h: Likewise.
	* m4/utility.c: Likewise.
	* modules/evalparse.c: Likewise.
	* modules/format.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/import.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/m4.h: Likewise.
	* modules/modtest.c: Likewise.
	* modules/mpeval.c: Likewise.
	* modules/perl.c: Likewise.
	* modules/shadow.c: Likewise.
	* modules/stdlib.c: Likewise.
	* modules/time.c: Likewise.
	* modules/traditional.c: Likewise.
	* po/Makevars: Likewise.
	* src/freeze.c: Likewise.
	* src/m4.h: Likewise.
	* src/main.c: Likewise.
	* src/stackovf.c: Likewise.
	* tests/builtins.at: Likewise.
	* tests/freeze.at: Likewise.
	* tests/generate.awk: Likewise.
	* tests/m4.in: Likewise.
	* tests/macros.at: Likewise.
	* tests/modules.at: Likewise.
	* tests/options.at: Likewise.
	* tests/others.at: Likewise.
	* tests/stackovf.test: Likewise.
	* tests/testsuite.at: Likewise.

2007-07-09  Eric Blake  <ebb9@byu.net>

	* modules/format.c (format): Avoid undefined behavior with %c.

2007-07-01  Gary V. Vaughan  <gary@gnu.org>

	The translation project has moved.
	* bootstrap (func_get_translations): Use the new translation
	project url.
	(TP_URL): Removed.

2007-06-26  Karl Berry  <karl@freefriends.org>  (tiny change)

	Match Free Software Directory categories.
	* doc/m4.texinfo (dircategory): Update.

2007-05-31  Eric Blake  <ebb9@byu.net>

	Add extension to divert builtin.
	* modules/m4.c (builtin_divert): Immediately divert second
	argument.
	* m4/output.c (m4_output_text): Allow 0 length.  Fixes regression
	from two days ago.
	(m4_shipout_text): Short-circuit on zero length.
	* tests/freeze.at (loading format 2): Expand test to catch
	regression.  Also check out-of-range version.
	* tests/builtins.at (divert): Expand test to check corner cases
	of extension.
	* doc/m4.texinfo (Divert): Document the extension.
	* NEWS: Likewise.
	Reported by Daniel Richard G.

2007-05-30  Eric Blake  <ebb9@byu.net>

	Port format improvements from branch.
	* doc/m4.texinfo (History): Mention upcoming 1.4.10 release.
	(Format): Enhance section.
	* modules/format.c (format): Accept %'hhd, and issue warnings on
	unrecognized specifiers.
	* modules/gnu.c (builtin_format): Adjust how format is called.

2007-05-28  Eric Blake  <ebb9@byu.net>

	* tests/options.at (--syncoutput): Add xfailed test.

	Fix sync line interaction with multiline comments.
	* doc/m4.texinfo (Preprocessor features): Improve documentation.
	(Syncoutput): Improve testsuite.
	(Incompatibilities): Add testcase, and document bug.
	* src/freeze.c (reload_frozen_state): Don't interfere with
	synclines when reloading state.
	* m4/input.c (m4__next_token): Report line where multiline tokens
	start.
	* m4/m4private.h (m4__token_type): Add parameter.
	* m4/m4module.h (m4_output_text): Export.
	(m4_shipout_text): Add parameter.
	* src/macro.c (m4_macro_expand_input, expand_token)
	(expand_argument): Adjust callers so that line is passed from
	input to output.
	* m4/output.c (output_text): Rename...
	(m4_output_text): ...to this, and export.
	(m4_insert_file, insert_diversion_helper): Update callers.
	(m4_shipout_text): Take new parameter for start line of token.
	Output at most one syncline per token.
	Reported by Sergey Poznyakoff.

	Fix large diversion corner cases.
	* tests/freeze.at (large diversion): New test.
	* m4/output.c (m4_tmpfile, m4_tmpopen): Simplify use of errno.
	(make_room_for): Use NULL, not 0, for pointers.
	(m4_freeze_diversions): Allow freezing large diversions.
	(insert_diversion_helper): Avoid using rewind.

	Also run gnulib unit tests during make check.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool
	--tests-base=tests/gnu --with-tests'.
	* configure.ac (AC_CONFIG_FILES): Build tests/gnu testdir.
	* Makefile.am (SUBDIRS): Run gnulib tests before ours.

2007-05-25  Eric Blake  <ebb9@byu.net>

	* m4/system_.h: Include <stdint.h>, for intmax_t.
	* THANKS: Update.
	Reported by Daniel Richard G.

2007-05-24  Eric Blake  <ebb9@byu.net>

	Provide consistent shift semantics regardless of hardware.
	* modules/m4.c (numb_lshift, numb_rshift, numb_urshift): Mask
	before shifting.
	(number, unumber): Always use [u]intmax_t.
	Reported by Gary V. Vaughan.

	Support POSIX flush semantics on all platforms.
	* modules/m4.c (m4_sysval_flush): Rely on gnulib.
	* ltdl/m4/gnulib-cache.m4: Fix typo in previous commit.

	Work around cygwin and mingw fseeko bugs.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	fseeko'.
	* modules/m4.c (m4_sysval_flush): Prefer fseeko over fseek.

2007-04-25  Eric Blake  <ebb9@byu.net>

	Test that regression in 1.4.9's eval doesn't recur.
	* doc/m4.texinfo (Eval): Check negative division.
	* THANKS: Update.

2007-04-12  Eric Blake  <ebb9@byu.net>

	Allow for running test in sticky or setgid directory.
	* tests/builtins.at (mkdtemp): Adjust test.

	Don't test for broken sed too soon.
	* tests/others.at (stdin seekable): Rearrange subtests.

	Work around 'stdin seekable' shortcoming on glibc.
	* ltdl/m4/gnulib-cache.m4: Use closein instead of closeout.
	* tests/others.at (stdin closed): Adjust to new output.
	* src/main.c (process_file): No need to return anything.
	(main): Use close_stdin instead of close_stdout.
	Reported by Ralf Wildenhues.

	Enable autobuild usage.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	autobuild'.
	* configure.ac (AB_INIT): Output autobuild information.

2007-04-11  Eric Blake  <ebb9@byu.net>

	Address testsuite shortcoming in 'stdout full' on glibc.
	* tests/others.at (stdout full): Adjust expected output when more
	than 1k text is printed to /dev/full.
	Reported by Ralf Wildenhues.

2007-04-10  Eric Blake  <ebb9@byu.net>

	* tests/macros.at (Arity and defn): Fix quoting.

2007-04-09  Eric Blake  <ebb9@byu.net>

	Address failure of 'seekable stdin' on Mac OS X.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	fflush'.

2007-04-07  Eric Blake  <ebb9@byu.net>

	Include <config.h> first in all C files, and not in headers.
	Fixes regression for --disable-assert builds from 2007-04-02.
	* src/m4.h (includes): Don't include config.h here.
	* m4/m4private.h (includes): Likewise.
	* m4/builtin.c: Include config.h before anything else.
	* m4/debug.c: Likewise.
	* m4/hash.c: Likewise.
	* m4/input.c: Likewise.
	* m4/m4.c: Likewise.
	* m4/macro.c: Likewise.
	* m4/module.c: Likewise.
	* m4/symtab.c: Likewise.
	* m4/syntax.c: Likewise.
	* m4/utility.c: Likewise.
	* src/freeze.c: Likewise.
	* src/stackovf.c: Likewise.

2007-04-03  Eric Blake  <ebb9@byu.net>

	* modules/m4.c (numb_ratio, numb_divide, numb_modulo): Avoid
	SIGFPE on x86 architectures.
	Reported by Ralf Wildenhues.

2007-04-02  Eric Blake  <ebb9@byu.net>

	Fix warnings from last commit.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	fprintf-posix sprintf-posix'.
	* m4/macro.c (expand_macro, trace_format): Use correct specifier
	for size_t.
	(process_macro): Avoid negative array index.
	* src/freeze.c (produce_resyntax_dump, produce_module_dump)
	(dump_symbol_CB, produce_frozen_state): Use correct specifier for
	size_t.

2007-04-02  Gary V. Vaughan  <gary@gnu.org>

	Get rid of the last 'differs in signedness' compiler warnings:

	* m4/macro.c (process_macro): m4_get_symbol_value_text() returns
	a regular 'char *', so variables to store the return address,
	and iterate through it should be regular 'char *' too.
	* m4/input.c (m4_input_block): The start and current members of
	the string part of this union store regular 'char *' types, so
	they should be regular 'char *' types too.

2007-04-02  Gary V. Vaughan  <gary@gnu.org>

	M4 was designed to have a small number of header files defining
	the interfaces to several source files each.  Keeping this in
	mind allows us to tidy things up considerably.  Having done this,
	it becomes clear that some of the installed headers reference
	other headers which are not installed (but that's another patch):

	* m4/m4private.h (stdio--.h, stdlib--.h, unistd--.h): Moved from
	here...
	* m4/system_.h (gnu/stdio--.h, gnu/stdlib--.h, gnu/unistd--.h):
	...to here, so client modules can benefit too.
	(assert.h, errno.h, limits.h, sys/stat.h): Include one here at the
	lowest level to save doing it multiple times elsewhere.
	* m4/debug.c (stdio.h): Removed.  The portable <gnu/stdio--.h>
	is already included via m4private.h.
	* modules/time.c (stdio.h): Ditto.
	* modules/gnu.c (stdlib.h): Ditto resp <gnu/stdlib--.h>.
	* modules/stdlib.c (stdlib.h, unistd.h): Ditto resp <gnu/stdlib--.h>
	and <gnu/unistd--.h>,
	* m4/m4private.h (m4module.h): Use angle brackets for an installed
	file.
	* m4/hash.h (system.h): Ditto.
	* modules/gnu.c (progname.h): Removed.
	* src/freeze.c (m4/system.h, m4private.h): Already included vi m4.h.
	* m4/m4private.h (assert.h, errno.h): Already included via
	m4/m4module.h.
	* m4/input.c (ctype.h): Ditto.
	* m4/module.c (ltdl.h): Ditto.
	* m4/output.c (errno.h, limits.h, stdio.h, sys/types.h, sys/stat.h)
	(unistd.h): Ditto.
	* m4/path.c (config.h, stdlib.h): Ditto.
	* m4/utility.c (config.h): Ditto.
	* modules/evalparse.c (assert.h, ctype.h): Ditto.
	* modules/gnu.c (assert.h, ctype.h, errno.h): Ditto.
	* modules/import.c (assert.h): Ditto.
	* modules/m4.c (assert.h, errno.h): Ditto.
	* modules/modtest.c (assert.h): Ditto.
	* modules/stdlib.c (sys/types.h): DittAo.
	* src/m4.h (ctype.h, errno.h, string.h, sys/types.h, ltdl.h):
	Ditto.
	* src/stackovf.c (assert.h): Ditto.
	* modules/gnu.c (m4/m4module.h, m4private.h): Build using the faster
	private interfaces when NDEBUG is defined.
	* modules/import.c (m4/m4module.h, m4private.h): Ditto.
	* modules/load.c (m4/m4module.h, m4private.h): Ditto.
	* modules/m4.c (m4/m4module.h, m4private.h): Ditto.
	* modules/modtest.c (m4/m4module.h, m4private.h): Ditto.
	* modules/mpeval.c (m4/m4module.h, m4private.h): Ditto.
	* modules/perl.c (m4/m4module.h, m4private.h): Ditto.
	* modules/shadow.c (m4/m4module.h, m4private.h): Ditto.
	* modules/time.c (m4/m4module.h, m4private.h): Ditto.
	* modules/traditional.c (m4/m4module.h, m4private.h): Ditto.
	* src/m4.h (locale.h): Moved from here...
	* src/main.h: ...to here.
	(m4private.h): Already included via m4.h.
	* src/stackovf.c (m4private.h): Ditto.

2007-03-28  Gary V. Vaughan  <gary@gnu.org>

	* Makefile.am (stamp-vcl): Removed.
	(CONFIG_STATUS_DEPENDENCIES): Depend directly on ChangeLog.

2007-03-28  Eric Blake  <ebb9@byu.net>

	* src/main.c (usage): Improve note to TRANSLATORS.
	* m4/system_.h (EXIT_FAILURE): Reflect gnulib changes.

	* tests/builtins.at (__m4_version__): Fix bug when TIMESTAMP is
	empty.

2007-03-24  Eric Blake  <ebb9@byu.net>

	* m4/output.c (m4_output_init): Update to latest gnulib.
	* bootstrap (ltdl/m4/.cvsignore): No longer track generated
	.cvsignore in CVS.
	* NEWS: Reflect release of 1.4.9.
	* THANKS: Update.

2007-03-07  Eric Blake  <ebb9@byu.net>

	* AUTHORS: Update

	Exercise gnulib's new POSIX *printf modules.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	vasprintf-posix'.
	* modules/format.c (format): Support %a and %A.
	* doc/m4.texinfo (Format): Test this addition.
	* NEWS: Document this addition.

2007-03-03  Eric Blake  <ebb9@byu.net>

	* m4/input.c (m4__next_token): Fix synclines when in batch mode.
	* doc/m4.texinfo (M4exit): Synch another section.
	(Syncoutput): Make similar to other sections.

2007-03-01  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo: Improve the indices.
	(Concept index): Rearrange to be last.
	(Sysval): Merge from branch.

	* doc/m4.texinfo (Syscmd, Esyscmd): Merge more doc sections.

2007-02-28  Eric Blake  <ebb9@byu.net>

	POSIX XCU ERN 137 was approved.
	* modules/mpeval.c (numb_extension): Delete.
	* modules/m4.c (numb_extension): Likewise.
	* modules/evalparse.c (comma_term, condition_term): Always
	implement ?: and , operators.
	* m4/symtab.c: Update comment to match reality.
	* src/freeze.c (produce_frozen_state, reload_frozen_state): Avoid
	dereferencing context directly when accessor exists.
	* src/main.c (usage): Prefer GNU_M4 over EMACS.
	(struct macro_definition): Rename...
	(struct deferred): ...to match usage.  All uses changed.
	* doc/m4.texinfo (Eval): Document this change.
	(Operation modes, Changeresyntax): Fix wording to prefer GNU_M4
	over emacs.
	(Preprocessor features, Changesyntax): Fix inaccuracies.
	* NEWS: Import branch NEWS items for 1.4.x series.  Document
	change in eval.

	POSIX XCU ERN 118 was approved.
	* modules/m4.c (define): Kill posixly_correct distinction in
	define behavior, since POSIX says GNU behavior complies.
	* tests/builtins.at (define): Restore original semantics.
	* doc/m4.texinfo (Pushdef): Document portability issues with
	define.
	(Incompatibilities): Clean up wording of what POSIX requires.
	* NEWS: Document this.

2007-02-26  Eric Blake  <ebb9@byu.net>

	Re-enable clean bootstrap on cygwin.
	* Makefile.am (AM_LDFLAGS): For now, export all symbols from
	modules, since otherwise we run afoul of current libtool
	limitations on cygwin and mingw.

2007-02-25  M. Levinson  <levinsm@users.sourceforge.net>  (tiny change)

	* src/freeze.c (reload_frozen_state): Avoid dereferencing freed
	memory.  Fixes regression introduced 2007-01-20.

2007-02-25  Eric Blake  <ebb9@byu.net>

	* tests/freeze.at (loading format 2): Augment test to catch
	regression introduced on 2007-01-20.
	* THANKS: Update.
	Reported by M. Levinson.

	* m4/system_.h (includes, EXIT_SUCCESS, EXIT_FAILURE): Adjust to
	latest gnulib.

2007-02-05  Eric Blake  <ebb9@byu.net>

	* tests/options.at (--fatal-warnings): New test.
	* tests/others.at (stdin seekable): Exit on error.
	* m4/m4private.h (M4_OPT_WARN_EXIT_BIT): New bit.
	(m4_get_warnings_exit_opt): Access it.
	* m4/m4module.h (m4_context_opt_bit_table): Access it.
	* m4/utility.c (m4_error, m4_error_at_line): Only force an exit
	on -EE.
	(m4_warn, m4_warn_at_line): Change exit status on -E, and force
	exit on -EE.
	* src/m4.c (usage): Document new -E behavior.
	(main): Make -E an additive option.
	* doc/m4.texinfo (Operation modes): Document the change.
	Reported by Ralf Wildenhues.

	* tests/others.at (stdin seekable): Fix bug in test.
	* ltdl/m4/gnulib-cache.m4: Gnulib module strstr no longer exists.

	* m4/input.c (struct m4_input_block): Remove unused field traced.

2007-02-03  Eric Blake  <ebb9@byu.net>
	and Bruno Haible  <bruno@clisp.org>  (tiny change)

	* doc/m4.texinfo (Input processing, Quoting Arguments): Beef up
	the examples.
	Reported by Bruno Haible.

2007-01-31  Eric Blake  <ebb9@byu.net>

	* m4/resyntax.c (m4_regexp_syntax_encode): Detect allocation
	failure.

2007-01-26  Eric Blake  <ebb9@byu.net>

	* m4/symtab.c (includes): Adjust to latest gnulib.
	* modules/m4.c (includes): Likewise.

2007-01-23  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (M4_SYNTAX_ASSIGN): Delete this unused
	extension to make enough room.
	(M4_SYNTAX_IGNORE): Change value to zero, since the (commented)
	code in input.c special cases this category.
	(M4_SYNTAX_LBRACE, M4_SYNTAX_RBRACE): New values in preparation
	for define(eleventh,${11}) extension.
	* m4/syntax.c: Update comments accordingly.
	(m4_syntax_create, m4_syntax_code): Handle { and }.
	* m4/input.c (m4__next_token): Likewise.
	* src/freeze.c (produce_frozen_state): Support new categories.
	(reload_frozen_state): When loading version 1, disable syntax
	features not present in 1.4.x.
	* tests/freeze.at: Sort and rename existing tests.
	(loading format 1): Ensure we don't break v1 frozen files that
	used raw ${.
	(loading format 2, reloading changecom, reloading changesyntax):
	New tests.
	* doc/m4.texinfo (Changesyntax, Frozen file format 1): Document
	the new syntax categories.
	(Arguments): Update the FIXME comment.
	(M4wrap): Merge examples from branch, before worrying about fixing
	m4wrap to obey POSIX.
	(Using frozen files): Start merging from branch.
	* NEWS: Update.

2007-01-20  Eric Blake  <ebb9@byu.net>

	* src/freeze.c (produce_char_dump): Delete.  Replace with...
	(produce_mem_dump): ...this new function, to encode more strings.
	Also make the coding easier to read and slightly more compact.
	(produce_syntax_dump): Only dump non-default syntax codes.
	(produce_module_dump, dump_symbol_CB, produce_frozen_state):
	Encode non-ASCII characters in user-supplied strings.
	(GET_STRING): Accept escape sequences in version 2.
	* NEWS: Document this change.
	* TODO: Update.

2007-01-16  Eric Blake  <ebb9@byu.net>

	Port patch from branch for stack overflow detection on BSD/OS.
	* ltdl/m4/stackovf.m4 (M4_SYS_STACKOVF): Check for stack_t.ss_sp.
	* src/stackovf.c (setup_stackovf_trap) [HAVE_SIGALTSTACK &&
	! HAVE_STACK_T_SS_SP]: Use this check.
	Reported by Chris McGuire.

2007-01-15  Eric Blake  <ebb9@byu.net>

	* tests/builtins.at (__m4_version__): New test.
	* modules/traditional.c (m4_macro_table): Provide windows and os2
	macros, as appropriate.  Add __traditional__ macro.
	* modules/mpeval.c (m4_macro_table): Name the macro __mpeval__,
	not __gmp__, to match module name.
	* modules/load.c (m4_macro_table): Name the macro __load__, not
	__modules__, to match module name.
	* doc/m4.texinfo (History, Shell commands, Platform macros): Merge
	from the branch.
	(Standard Modules): Improve wording.
	(Incompatibilities): Move platform macros into their own node.
	(Load, Unload): Use actual examples.
	* NEWS: Document this change.
	* THANKS: Update.

2007-01-13  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Mpeval): Add tests.
	* tests/testsuite.at (AT_CHECK_GMP): New filter, factored from...
	* tests/builtins.at (gmp): ...here.  Rename test to...
	(mpeval): ...this.
	* tests/generate.awk (new_test): Filter out mpeval tests when gmp
	is not available.
	* m4/m4module.h (m4_get_no_gnu_extensions_opt): Merge
	no_gnu_extensions with posixly_correct_opt, since they were set in
	sync.
	* m4/m4private.h (struct m4): Remove no_gnu_extensions.
	* src/main.c (main): Update caller.
	* src/freeze.c (reload_frozen_state): Likewise.
	* modules/m4.c (m4wrap): Likewise.

2007-01-12  Eric Blake  <ebb9@byu.net>

	* m4/syntax.c (m4_set_comment): XCU ERN 131 was approved by
	POSIX, so update the comment.
	* doc/m4.texinfo (Inhibiting Invocation): XCU ERN 130 was
	approved by POSIX, so we can always have blind macros, even when
	POSIXLY_CORRECT.
	(Ifelse): Mention the term `blind builtin'.

2007-01-08  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* doc/m4.texinfo: Fix a couple of typos.

2007-01-08  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: Update for new year.
	* ltdl/m4/gmp.m4 (_M4_LIB_GMP): Cover all error cases.
	Reported by Ralf Wildenhues.

2007-01-06  Eric Blake  <ebb9@byu.net>

	* m4/m4private.h (to_uchar): Move...
	* m4/m4module.h: here, so modules can use it.
	* src/main.c (usage, long_options): Support --posix as a synonym
	for --traditional.
	* modules/m4.c (numb_invert): Detect unsupported x**-y.
	(numb_incr, numb_urshift, numb_extension): New macros.
	(numb_obstack): Port patch from branch to support radix 1 output.
	* modules/mpeval.c (numb_obstack): Use \ for ratios.
	(numb_incr, numb_urshift, numb_extension): New macros.
	(mpq2mpz): Warn rather than error.
	* modules/evalparse.c (URSHIFT, NEGATIVE_EXPONENT): New
	enumerators.
	(eval_error): Rearrange, so that all ignorable errors are less
	than SYNTAX_ERROR.
	(eval_text, last_text): Obey C++ type safety rules.
	(numb_pow): Change return type.
	(exp_term): Adjust caller.
	(m4_evaluate): Fail on bad exponent.
	(logical_or_term, logical_and_term): Ignore failed ** in short
	circuit.
	(eval_lex): Fix typos when detecting <<= and >>=.  Use \ instead
	of : for ratio.  Support >>>, ,, and ?:.  Port patch from branch
	to parse radix 1 numbers.
	(condition_term, comma_term): New parse functions.
	(shift_term): Support >>>.
	(m4_evaluate): Port patch from branch to output radix 1 numbers.
	Warn instead of error for most parse problems.
	* doc/m4.texinfo (Limits control, Eval): Document these changes.
	* NEWS: Document new operators and new command line option.

2007-01-04  Eric Blake  <ebb9@byu.net>

	* configure.ac (AC_SYS_LARGEFILE): Guarantee large file support.

2007-01-03  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Format, Incr): More merges.
	(Eval): Ensure C precedence rules are met.
	* modules/evalparse.c (BADOP, INVALID_OPERATOR): New enumerators.
	(not_term, logical_not_term): Delete; these are same precedence
	as other unary operators.
	(equality_term): New; these are lower precedence than relational
	operators.
	(eval_lex, simple_term, m4_evaluate): Recognize forbidden C
	operators for better error messages.
	(logical_or_term, logical_and_term): Short-circuit out the error
	of division by zero.
	(unary_term): Allow consecutive unary operators.
	* modules/m4.c (int2numb, numb2int): Delete; these potentially
	truncate bits.
	(numb_not, numb_eor, numb_ior, numb_and): Update callers.
	* modules/mpeval.c (reduce1, reduce2): Protect macros better.
	* NEWS: Document this change.

2006-12-27  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Substr, Patsubst): Merge more sections from the
	branch.
	* modules/m4.c (substr): Merge from branch.

2006-12-26  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Changesyntax): Check for regressions with
	changesyntax(W=...).

2006-12-22  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_set_syntax): Change signature.
	* modules/gnu.c (m4_resyntax_encode_safe): Reduce error to
	warning.
	(changesyntax): Likewise, and update caller.
	* m4/m4private.h (m4_syntax_table): Add orig member.
	* m4/syntax.c (m4_set_quotes, m4_set_comment): Merge from branch.
	Don't set is_single_quotes and is_single_comments when the begin
	character is shadowed by another syntax type.
	(m4_syntax_create): Populate default syntax table.
	(add_syntax_attribute): Don't lose quote assignment.
	(remove_syntax_attribute): Only allow removing rquote or ecomm.
	(add_syntax_set, subtract_syntax_set, set_syntax_set)
	(reset_syntax_set): New helper routines.
	(m4_set_syntax): Alter semantics - NUL key reverts entire syntax
	to default, and empty chars reverts that key to default.
	(check_is_single_quotes, check_is_single_comments): New helper
	routines.
	* modules/m4.c (changecom): Merge from branch.
	* m4/input.c (m4__next_token): Rearrange token recognition order
	to macro, quote, comment, in order to match traditional
	implementations.
	* src/freeze.c (reload_frozen_state): Update caller.
	* doc/m4.texinfo (Changequote, Changecom): Merge from branch, with
	modifications.
	(Changeresyntax): Revise to match style of surrounding sections
	and add more examples.
	(Changesyntax): Likewise, and update to new semantics.
	* NEWS: Document this change.

	* doc/m4.texinfo (Operation modes): Avoid underfull hbox.
	(M4wrap, Eval, Errprint): Fix typos.
	(Divnum): Not necessary to redivert in example.

2006-12-21  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Len, Index macro, Regexp): More section merging
	from branch.

2006-12-19  Eric Blake  <ebb9@byu.net>

	* modules/m4.h (m4_sysval_flush_func): Adjust prototype.
	* modules/m4.c (m4_sysval_flush): Add parameter, so that m4exit
	can track write errors without all other callers warning multiple
	times.
	(sysval_flush_helper): New function.
	(dumpdef, syscmd, errprint, m4exit): Adjust callers.
	* modules/gnu.c (esyscmd): Likewise.
	* tests/others.at (stdout closed, stdout full): Error message
	update.

2006-12-16  Eric Blake  <ebb9@byu.net>

	* src/main.c: Fix missing include.

	* src/main.c (main): Check for errors when closing stdin.
	* modules/m4.c (m4exit): Missed part of previous patch: flush
	stdin before a successful exit.
	Reported by Ralf Wildenhues.

2006-12-14  Eric Blake  <ebb9@byu.net>

	* modules/m4.c (m4_sysval_flush): Flush stdin before exiting, as
	required by POSIX.
	* tests/others.at (stdin seekable): New test.

2006-12-09  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* doc/m4.texinfo: Fix some typos.

2006-12-04  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Undivert, Divnum, Cleardivert): Merge more doc
	sections.
	(Modules): Make style consistent.

2006-11-16  Eric Blake  <ebb9@byu.net>

	* bootstrap: Relax m4 requirement, thanks to...
	* configure.ac (Gettext support): ...this workaround to the 1.4.4
	bug.  Undoes restriction added on 2006-11-09.

	* tests/builtins.at (esyscmd, syscmd): Redo, since spilled
	diversions are now closed when not active.
	(divert): Remove check now in the manual.
	* tests/others.at (stderr closed): Likewise.
	(stdout closed): Add a check.
	* doc/m4.texinfo (Include, Search Path, Diversions, Divert): Sync
	more docs with branch.

2006-11-14  Eric Blake  <ebb9@byu.net>

	Remerge sparse diversion handling from branch.
	* ltdl/m4/gnulib-cache.m4: Replace avltree-list with
	avltree-oset.
	* m4/output.c (diversion_table): Change type to gl_oset_t.
	(m4_output_init, m4_output_exit, cleanup_tmpfile, make_room_for)
	(m4_make_diversion, insert_diversion_helper, m4_insert_diversion)
	(m4_undivert_all, m4_freeze_diversions): Adjust all callers.
	(div0, diversion_storage): New variables.
	(diversions, equal_diversion_CB): Deleted.
	(threshold_diversion_CB): New callback.
	(m4_tmpname, m4_tmpopen, m4_tmpclose, m4_tmpremove): New
	functions.
	(m4_tmpfile): Move cloexec action here.

	* m4/resyntax.c (m4_regexp_syntax_encode): Avoid bug with signed
	char.

2006-11-13  Eric Blake  <ebb9@byu.net>

	Add several new command line options.
	* src/main.c (usage): Update.
	(OPTSTRING, long_options): Add --pushdef, --popdef, --gnu,
	--traceon, --traceoff, --syncoutput, --warnings, --unload-module.
	Make --regexp-syntax argument optional.
	(main): Support new options.  Fix regression in interactive
	behavior from Nov 8.
	* m4/m4private.h (M4_OPT_SYNCOUTPUT_BIT): Rename from
	M4_OPT_SYNC_OUTPUT_BIT.
	* m4/m4module.h (m4_context_opt_bit_table): Rename sync_output to
	syncoutput, to match option.
	(m4_parse_truth_arg): New prototype.
	* m4/utility.c (m4_parse_truth_arg): Implement it.
	* m4/output.c (m4_shipout_text): Adjust sync_output caller.
	* modules/gnu.c (syncoutput): Adjust sync_output caller, and use
	m4_parse_truth_arg.
	* doc/m4.texinfo (Operation modes, Dynamic loading features)
	(Preprocessor features, Limits control, Debugging options)
	(Command line files): Update documentation.
	* tests/builtins.at (mkstemp): Simplify.
	* tests/macros.at (Command line pushdef): New test.
	(Command line define): Improve.
	* tests/options.at (--traceon and --traceoff, --syncoutput): New
	tests.
	(POSIXLY_CORRECT): Likewise.
	(deprecated options): Augment.
	(--regexp-syntax): Update, now that -r takes optional arg.
	* NEWS: Reformat.  Document new options.

2006-11-11  Eric Blake  <ebb9@byu.net>

	One step closer to allowing C++ compilation - don't blindly
	convert between char* and unsigned char*.
	* m4/m4module.h (m4_set_syntax): Change signature.
	* m4/m4private.h (m4_string): Use signed char.
	(m4_get_syntax_lquote, m4_get_syntax_rquote, m4_get_syntax_bcomm)
	(m4_get_syntax_ecomm): No longer a need to cast.
	* m4/syntax.c (m4_set_syntax, m4_syntax_create, m4_set_quotes):
	Reflect this change.
	* m4/macro.c (expand_argument): Simplify.
	(expand_token): Use proper type.
	* src/freeze.c (reload_frozen_state): Likewise.
	* m4/input.c (MATCH, match_input): Likewise.
	* modules/m4.c (translit): Likewise.
	* modules/gnu.c (substitute): Simplify.

	* m4/macro.c (trace_format): Use canonical type name.
	* m4/output.c (m4_freeze_diversions): Likewise.
	* src/freeze.c (produce_module_dump, dump_symbol_CB)
	(produce_frozen_state): Likewise.
	* m4/m4private.h (to_uchar): Grab from branch.
	* m4/input.c (string_peek, string_read): Use it.
	* m4/utility.c (skip_space): Likewise.
	* src/main.c (main): Likewise.
	* doc/m4.texinfo (Translit): Remerge from branch.
	* tests/builtins.at (translit): Test 8-bit range.
	* modules/m4.c (m4_expand_ranges): Merge from branch.

2006-11-09  Eric Blake  <ebb9@byu.net>

	* bootstrap: Validate that installed M4 is powerful enough.
	Reported by Gary V. Vaughan, analyzed by Stepan Kasal.

2006-11-08  Eric Blake  <ebb9@byu.net>

	Merge deferred handling of -D option from branch.
	* doc/m4.texinfo (Debugging options, Preprocessor features)
	(Dynamic loading features, Operation modes, Invoking m4):
	Document this change.
	* src/main.c (OPTSTRING): Specify in-order processing.
	(process_file): New function.
	(main): Use it to interleave files and deferred options.
	* tests/macros.at (Command line define): New test.
	* tests/generate.awk: Allow '@comment file' as first example
	within a node.
	* tests/options.at (option grouping): Update to reflect actual
	POSIX semantics.
	(file names): New test.

2006-11-07  Eric Blake  <ebb9@byu.net>

	* m4/output.c (cleanup_tmpfile, m4_insert_diversion_helper): Check
	for failure.

	* tests/builtins.at (m4exit): New test; failed on cygwin before
	this patch.
	* m4/output.c (cleanup_tmpfile): Close files before removing
	directory.
	(make_room_for, m4_output_exit): Ensure that atexit handler
	invoked from m4_error sees consistent state.

	* doc/m4.texinfo (Errprint): Merge another doc node.
	* tests/builtins.at (dumpdef, errprint): New tests.
	* modules/m4.c (errprint): Merge from branch: flush before
	printing to stderr.

2006-11-02  Eric Blake  <ebb9@byu.net>

	* bootstrap: Update bootstrap requirement wording.
	Reported by Bruno Haible.

2006-10-31  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	strstr'.
	* doc/m4.texinfo (Translit): Merge from branch.
	* modules/m4.c (divert, substr): Ignore excess arguments.
	(index, translit): Merge from branch.
	* tests/builtins.at (translit): Add a test.

2006-10-30  Eric Blake  <ebb9@byu.net>

	* m4/m4private.h (m4_get_symbol_value_module): Delete accidental
	checkin.
	* m4/symtab.c (m4_get_symbol_value_module): Likewise.

	* modules/m4.c (m4_make_temp): Make safe across libtool.
	* m4/symtab.c (dump_symbol_CB) [DEBUG_SYM]: Avoid warnings.
	* configure.ac (--with-modules): Accomodate changed module
	location when doing './configure --enable-debug'.

2006-10-28  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	config-h.'

2006-10-27  Eric Blake  <ebb9@byu.net>

	* bootstrap (gnulib): No longer a need to patch after gnulib-tool
	--update.
	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump requirement to
	0.16, since 0.15 is incompatible with our automake requirement.

	* m4/macro.c (expand_argument): Fix missing initialization.
	* m4/m4private.h (struct m4_symbol_value): Store entire
	m4_builtin, not just the func.
	(m4_get_symbol_value_func): Update.
	(m4_get_symbol_value_builtin, m4_set_symbol_value_builtin): New
	fast accessors.
	* m4/m4module.h (m4_get_symbol_value_builtin)
	(m4_get_symbol_builtin): New prototypes.
	(m4_set_symbol_value_func): Delete, replace with...
	(m4_set_symbol_value_builtin): New function.
	(m4_builtin_find_by_name): Change signature.
	* m4/symtab.c (m4_symbol_value_print): Simplify.
	(m4_get_symbol_value_func): Update.
	(m4_get_symbol_value_builtin): New function.
	(m4_set_symbol_value_func): Delete, replace with...
	(m4_set_symbol_value_builtin): New function.
	(dump_symbol_CB) [DEBUG_SYM]: Simplify.
	* m4/builtin.c (m4_builtin_find_by_name): Change signature.
	* m4/input.c (struct m4_input_block): Remove unused trace member.
	(m4_push_builtin, builtin_print, init_builtin_token): Update
	callers.
	* m4/module.c (install_builtin_table): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* modules/gnu.c (builtin): Make it possible to retrieve a builtin
	token, even after the builtin has been undefined.
	* doc/m4.texinfo (Builtin): Document new capability.
	* NEWS: Likewise.

	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	tempname'.
	* modules/m4.c (m4_make_temp): Use it.
	* tests/builtins.at (mkstemp, mkdtemp): Update message wording.

2006-10-27  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* Makefile.am (dist_pkgdata_DATA): Distribute recently-added
	files.

2006-10-26  Eric Blake  <ebb9@byu.net>

	Silence -O2 -Wall -Wwrite-strings warnings.
	* m4/m4private.h (m4_symbol_value): Const-ify text.
	* m4/m4module.h (m4_get_symbol_value_text)
	(m4_get_symbol_value_placeholder, m4_set_symbol_value_text)
	(m4_set_symbol_value_placeholder): Likewise.
	* m4/macro.c (expand_token, expand_argument, expand_macro): Fix
	fallout.
	* m4/symtab.c (m4_symbol_value_delete, m4_symbol_value_copy)
	(m4_get_symbol_value_text, m4_get_symbol_value_placeholder)
	(m4_set_symbol_value_text, m4_set_symbol_value_placeholder):
	Likewise.
	* modules/format.c (format): Likewise.
	* src/main.c (main): Likewise.
	* src/freeze.c (produce_symbol_dump, dump_symbol_CB): Likewise.
	* modules/shadow.c (shadow, test): Likewise.
	* m4/output.c (m4_make_diversion): Don't hold on to empty
	diversions.
	(m4_output_init, make_room_for, m4_undivert_all): Don't type-pun.
	(m4_freeze_diversions): Likewise.  Don't use uninitialized
	variable.

	Convert diversions to list instead of sparse array, part 2.
	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	avltree-list'.
	* m4/output.c (m4_diversion): Add next pointer and divnum members.
	(diversion_table): Convert to a list instead of a sparse array.
	(free_list): Maintain free list of reclaimed diversions.
	(equal_diversion_CB, cmp_diversion_CB): New functions.
	(m4_output_init): Set up list.
	(m4_output_exit): Tear down list.
	(make_room_for, m4_undivert_all, m4_freeze_diversions): Change
	list iteration.
	(m4_make_diversion): Change creation of new diversions.
	(m4_insert_diversion_helper): New function, to avoid list
	searches.
	* tests/builtins.at (divert): The test now passes.
	* NEWS: Document this improvement.

	Convert diversions to list instead of sparse array, part 1.
	* m4/m4module.h (m4_shipout_text, m4_shipout_string): Use size_t
	for length.
	* m4/output.c (diversion, total_buffer_size, output_unused):
	Track size in size_t.  All users changed.
	(struct diversion): Reduce size now, to compensate for part 2.
	(m4_make_diversion, make_room_for): Avoid malloc overflow.
	(m4_output_exit): Fix typo in assert.
	(m4_output_init, make_room_for, m4_make_diversion)
	(m4_insert_diversion, m4_freeze_diversions): Adjust users of
	struct m4_diversion to disambiguate the new union.
	* tests/builtins.at (divert): Detect this failure.

2006-10-25  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_push_builtin): Add parameter.
	* modules/m4.c (defn): Update caller.
	* m4/input.c (file_read_init, string_read_init): No longer
	needed.
	(input_funcs): Change signature of read_func, all callers
	updated.
	(composite_peek, composite_read, composite_unget),
	(composite_print, composite_funcs): New input type.  Not yet
	fully utilized, but one step closer to fixing defn.
	(m4_input_block): Make every input block track current file and
	line.  Rename some members.  Remove unused out_line.  Add support
	for composite input block.
	(input_change): New flag.
	(file_peek, file_read, file_clean, file_unget, file_print):
	Update callers.
	(m4_push_file, m4_push_builtin, m4_push_string_init)
	(m4_push_string_finish, m4_push_wrapup, m4_pop_wrapup)
	(m4_skip_line, pop_input): Track input block changes.
	(m4_pop_wrapup): Avoid overflow.
	(init_builtin_token): Handle composite input.
	(next_char): Handle input block changes.
	* doc/m4.texinfo (Location): Remerge from branch.

	* src/m4.h (includes): Need <locale.h> after all; fixes
	regression from yesterday.

	* m4/system_.h (obstack_regrow): New macro.  Hopefully glibc will
	accept it someday.
	* m4/macro.c (expand_macro): Avoid referencing invalid memory.
	Handle nesting the argc obstack.
	(expand_token): Avoid unnecessary malloc.
	(collect_arguments): Copy name before invalidating it.
	(argc_stack, argv_stack): New variables.
	(m4_macro_expand_input): Initialize argc and argv stacks once per
	file, instead of once per macro.

2006-10-24  Eric Blake  <ebb9@byu.net>

	* src/m4.h (includes): Add gettext.h, for N_.  Assume setlocale.

2006-10-23  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Macro Arguments, Incompatibilities): Remerge
	from branch regarding stripped leading whitespace.

	* modules/m4.c (includes): Use safe headers even when configured
	with --enable-assert.
	(m4_builtin_table, m4_make_temp): Work around fact that mkstemp is
	#defined as mkstemp_safer.

2006-10-21  Eric Blake  <ebb9@byu.net>

	* modules/m4.c (m4_make_temp): Change signature.
	(maketemp, mkstemp): Update callers.
	* modules/m4.h (m4_make_temp_func): New export.
	* modules/gnu.c (mkdtemp): New macro.
	* doc/m4.texinfo (Operation modes): Document interaction with
	--safer.
	(Mkdtemp): New node.
	* tests/builtins.at (mkdtemp): New test.
	(mkstemp): Check for umask effect.
	* NEWS: Document new builtin.

	* tests/generate.awk (normalize): Update recognition of trailing
	spaces in tests.
	* doc/m4.texinfo: Minor formatting fixes from branch.
	(Foreach, Improved foreach): Merge from branch.
	* examples/foreach.m4: Merge from branch.
	* examples/foreachq.m4: New file from branch.
	* examples/foreach2.m4: Likewise.
	* examples/foreachq2.m4: Likewise.

	* doc/m4.texinfo (titlepage): Add myself as author.
	* src/main.c (AUTHORS): Likewise.

2006-10-19  Eric Blake  <ebb9@byu.net>

	* modules/m4.c (m4_make_temp, mkstemp): New functions.
	(maketemp): Add POSIX behavior and a warning.
	* tests/others.at (maketemp): Move this test...
	* tests/builtins.at (mkstemp): ...to here, and beef up.
	* tests/options.at (--safer): Update to new warning message.
	* doc/m4.texinfo (Mkstemp): Sync from branch.
	(Extensions): Update maketemp behavior.
	* NEWS: Document that maketemp now always warns.

	* tests/generate.awk: For ease of doc-writing, simplify selection
	of '-Ipath/to/examples' to '@comment examples'.
	* examples/forloop.m4: Simplify.
	* examples/forloop2.m4: New file.
	* examples/quote.m4: New file.
	* doc/m4.texinfo (Improved forloop): New node.
	(Manual): Clarify use of examples directory.
	(Shift, Forloop): Resync from branch.
	(Include, Location): Update to new usage of examples directory.

	* m4/system_.h (includes): Pick up <unistd.h> before checking for
	_POSIX_VERSION.
	(gettext_noop): Don't define here, let gettext.h do it instead.
	* po/POTFILES.in: Update entries to reflect gnulib imports.

2006-10-16  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: Augment with 'gnulib-tool --import
	configmake'.
	* configure.ac (AM_INIT_AUTOMAKE): Bump requirement to 1.10a, for
	pkglibexecdir support.
	* Makefile.am (m4_libm4_la_SOURCES, m4/pathconf.h): No longer
	worry about pathconf.h, now that gnulib does it for us.
	(pkgmodincludedir): Simplify.
	(pkglibexecdir): Delete, now that automake does this.
	* m4/module.c (m4__module_init): Use PKGLIBEXECDIR.
	* src/main.c (usage): Likewise.
	* m4/symtab.c (m4_symbol_value_groks_macro): Fix typo.

	* doc/m4.texinfo: Port some changes from the branch.
	(Invoking m4): Promote to a chapter, instead of a section of
	Preliminaries.
	(Operation modes, Dynamic loading features, Preprocessor features)
	(Limits control Frozen state, Debugging options)
	(Command line files): Subdivide into new sections.
	(Cleardivert): Rename from cleardiv.

2006-10-14  Eric Blake  <ebb9@byu.net>

	* tests/others.at (stdin closed): Update to match previous patch.

	* m4/input.c (file_clean): Don't close stdin twice, POSIX says it
	is not portable.
	Reported by Ralf Wildenhues.

	* modules/m4.c (undivert): Merge from branch.
	* doc/m4.texinfo (Improved fatal_error): Fix typo.
	(Improved exch): New node, copied from branch.
	(Improved cleardivert): Update from branch.
	* THANKS: Update.

2006-10-13  Eric Blake  <ebb9@byu.net>

	* configure.ac (AC_CONFIG_HEADERS): Name the template config.hin,
	not config-h.in.
	* modules/gnu.c (builtin, indir): Transparently handle builtin
	tokens from defn.
	* doc/m4.texinfo (Indir, Builtin): Remerge from branch.
	* m4/input.c (m4_pop_wrapup): Display debug message when switching
	to wrapped text.
	(m4_input_init): No need to use empty file any more.
	(file_print): Display correct file name.
	* m4/utility.c (m4_error, m4_warn): Ensure we don't try to
	dereference a NULL file name.
	* m4/m4module.h (m4_pop_wrapup): New parameter.
	(m4_symbol_value_groks_macro, m4_symbol_groks_macro): New
	prototypes.
	* m4/m4private.h (m4_symbol_value_groks_macro): Faster version.
	* m4/symtab.c (m4_symbol_value_groks_macro): New method.
	* src/main.c (main): Adjust caller.
	* tests/options.at (--debugmode): Test more output from -dV.

2006-10-12  Eric Blake  <ebb9@byu.net>

	* m4/input.c (m4_print_token) [DEBUG_INPUT]: Modernize.

	* m4/m4private.h (m4__next_token_is_open): New prototype.
	* m4/m4module.h (m4_push_single): Delete; push_string is an
	adequate interface, and removing support for this simplifies the
	input engine.
	(m4_push_wrapup): New parameter.
	(m4_is_syntax): Delete; m4_has_syntax is sufficient.
	(M4_SYNTAX_LQUOTE, M4_SYNTAX_BCOMM, M4_SYNTAX_MASKS): Make
	start-quote and start-comment exclusive from other syntax
	categories.
	* m4/syntax.c: Likewise.
	* m4/input.c (input_funcs): Make polymorphic without requiring
	clients to know whether they are located at isp.  All users
	changed.
	(file_names): New variable.
	(m4_input_init): Initialize it.
	(m4_push_file): Use it.
	(m4_input_exit): Free it after use.
	(m4__next_token): Simplify slightly.
	(m4__peek_token): Rename and simplify...
	(m4__next_token_is_open): ... to this.  In particular, this
	allows us to avoid a double ungetc, which POSIX doesn't
	guarantee.
	(struct m4_input_block, m4_push_single, single_peek, single_read):
	Remove support for single characters, as the input engine now
	guarantees we don't need it.
	(file_unget, string_unget, m4_input_print, unget_input):
	Strengthen assertions.
	(file_init_funcs, file_read_init): New for file reading.
	(string_init_funcs, string_read_init): New for wrapped text.
	(m4_push_string_init, m4_push_string_finish, m4_push_wrapup):
	Support wrapped text with locations.
	(m4_skip_line): Support dnl across include file boundary.
	(peek_char): Don't pop input when peeking.
	(file_peek): Peek can be called at the end of the file.
	(string_read): Don't read beyond string bounds.
	* m4/macro.c (expand_token, collect_arguments): Update callers.
	(expand_macro): Report errors at location of open parenthesis.
	(expand_token, expand_argument, process_macro): Avoid negative
	array dereferences with m4_has_syntax.
	* m4/utility.c (skip_space): Likewise.
	* modules/m4.c (m4wrap): Update caller.
	* tests/builtins.at (__file__, __line__, dnl): New tests.
	* tests/options.at (--debugmode): Normalize the output.
	* doc/m4.texinfo (Macro Arguments, Dnl, History, Location):
	Remerge recent changes from branch.
	(Improved fatal_error): New node from branch.

2006-10-11  Eric Blake  <ebb9@byu.net>

	* src/main.c (usage, long_options): Add --debugmode as an alias
	for --debug, to match macro name.
	* tests/options.at (--debugmode): Rename from --debug, and test
	for new alias.
	(--discard-comments): Augment test.
	* doc/m4.texinfo (Invoking m4, Debugmode): Document this.
	* NEWS: Likewise.

2006-10-10  Eric Blake  <ebb9@byu.net>

	Trace improvements: debugmode(c) was always printing the last two
	lines paired, combine them; and show non-text expansions.
	* m4/macro.c (trace_prepre): Update to show what the macro will
	expand to.
	(trace_pre): No need to special-case on debugmode(c).
	(trace_post): Likewise.  Also, show non-text expansions.
	(expand_macro): Update caller.  Collecting arguments can change
	debug mode, so cache values beforehand.
	(trace_format): Remove support for unused %l%S%r, and fix support
	for %z to match gcc's attribute((printf)).
	(trace_header): Update caller.
	* m4/input.c (struct m4_input_block): Rename from input_block.
	(struct input_funcs): Add print_func member.
	(file_print, builtin_unget, builtin_print, string_print)
	(m4_input_print): New functions.
	(m4_push_string_finish): Change return type.
	(m4_push_file): Fix missing use of close parameter.
	* m4/debug.c (m4_debug_decode): Don't clear pending traces.
	* m4/m4module.h (m4_input_print): New prototype.
	* tests/builtins.at (debug, esyscmd, multiquotes, syscmd): Update
	to match behavior change.
	* tests/options.at (--debug): Likewise.
	* tests/macros.at (Propagation of traceon)
	(Propagation of --trace): Likewise.
	* tests/others.at (stderr closed, stdout closed, stdin closed):
	Likewise.
	* doc/m4.texinfo (Forloop): Simplify.
	(Trace): Update to changed behavior.
	(Debugmode): Document this change.
	* src/main.c (usage): Likewise.
	* NEWS: Likewise.

2006-10-09  Eric Blake  <ebb9@byu.net>

	* m4/path.c (m4_include_env_init): Don't alter result of getenv.
	Reported by Ralf Wildenhues.

	* modules/gnu.c (gnu_buf): Rename from buf to silence -Wshadow.

2006-10-07  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_set_exit_failure): New prototype.
	* m4/utility.c (m4_set_exit_failure): New function.
	* modules/m4.c (m4exit): Use it to avoid yet another global
	variable export in libm4.

2006-10-06  Eric Blake  <ebb9@byu.net>

	* m4/output.c (cleanup_tmpfile): Exit nonzero on failure to clean
	up.
	* tests/others.at (stdout closed): Fix final check.

	Replace uses of tmpfile with clean-temp, since tmpfile is
	incompatible with closeout.
	* tests/builtins.at (esyscmd, syscmd): Don't use pipe; it loses
	exit status of m4.
	* tests/others.at (stderr closed): Likewise.
	* tests/testsuite.at (M4_ONE_MEG_DEFN): Actually hit one meg.
	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	clean-temp.
	* m4/output.c [!HAVE_TMPFILE]: Delete dead code.
	(m4_tmpfile, cleanup_tmpfile): New functions.
	(make_room_for, m4_insert_diversion): Use clean-temp module.
	* configure.ac (AC_CHECK_FUNCS_ONCE): No longer check for
	tmpfile.
	* doc/m4.texinfo (Diversions): Document new use of $TMPDIR.

	* m4/utility.c (m4_numeric_arg): Merge from branch.
	* modules/gnu.c (debuglen): New builtin.
	* src/main.c (usage, ARGLENGTH_OPTION, long_options, main):
	Rename --arglength to --debuglen.
	* tests/options.at (--arglength): Rename to --debuglen.
	(deprecated options): Augment test.
	* doc/m4.texinfo (Invoking m4): Document the name change.
	(Debugmode): Rename from Debug Levels.
	(Debugfile): Rename from Debug Output.
	(Debuglen): New node.
	* NEWS: Document these changes.

	* modules/m4.c (m4exit): Fix typo.  Ensure desired exit status in
	case closing a module exits.

	* modules/m4.c (m4exit): Merge from branch.
	* m4/m4.c (m4_delete): Avoid assertion triggered by last patch.

2006-10-05  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	closeout.
	* Makefile.am (m4_libm4_la_DEPENDENCIES): Add missing dependency.
	* src/main.c (main): Close stdout on exit.
	* m4/debug.c (set_debug_file): Check for write failure.
	* m4/m4.c (m4_delete): Don't mask write failure.
	* tests/testsuite.at (AT_CHECK_M4): Allow tracing by expanding
	macros before calling AT_CHECK.
	(M4_ONE_MEG_DEFN): New helper macro.
	* tests/others.at (stdout full): New test.
	(stderr closed, stdin closed, stdout closed): Augment.
	* tests/builtins.at (syscmd): New test.
	(esyscmd): Augment.

2006-10-04  Eric Blake  <ebb9@byu.net>

	* tests/builtins.at: Alphabetize tests.
	* tests/testsuite.at (AT_CHECK_M4): Allow choosing stdin.
	* tests/generate.awk (new_test): Fix underquoting.
	* tests/others.at (maketemp): Rename from misc.
	(stdin closed, stdout closed, stderr closed): New tests.

2006-10-03  Eric Blake  <ebb9@byu.net>

	Avoid all global variables in modules, so that --disable-static
	can work on cygwin.
	* examples/incl.m4: New file, from branch.
	* Makefile.am (dist_pkgdata_DATA): Distribute it.
	* doc/m4.texinfo (Location): Merge this section from branch.
	(Include): Update the test.
	* tests/generate.awk (new_test): Allow for VPATH build
	pre-processing of expected __program__ output.
	* m4/m4module.h (m4_current_diversion, m4_output_current_line):
	Avoid global variables.
	(m4_context_field_table): Add current_diversion, output_line.
	(m4_output_init, m4_make_diversion): Add parameter.
	(m4_get_program_name, m4_set_program_name): New accessors.
	* m4/m4private.h (m4_get_current_diversion),
	(m4_set_current_diversion, m4_get_output_line)
	(m4_set_output_line): New accessors.
	* m4/utility.c (m4_get_program_name, m4_set_program_name): New
	methods.
	* modules/m4.c (divnum, divert): Adjust callers.
	* modules/gnu.c (__program__): Likewise.
	* m4/output.c (m4_output_init, m4_make_diversion)
	(m4_freeze_diversions, m4_shipout_text, m4_make_diversion)
	(m4_insert_diversion): Likewise.
	* m4/input.c (file_clean, m4_push_file): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* src/main.c (main, usage): Likewise.

	Partially plug memory leak when unloading gnu module.
	* tests/modules.at (unload gnu module): New test.
	* modules/gnu.c (gnu_LTX_m4_finish_module): New function.
	(m4_regexp_compile): Move static storage to module visibility.
	* tests/options.at (--debug): Adjust to new output.

2006-09-29  Eric Blake  <ebb9@byu.net>

	Even when not the first option, --help can't have side effects.
	* tests/options.at (--debugfile): Detect bugs in this area.
	* tests/testsuite.at (AT_CHECK_M4): Avoid a process when ignoring
	stderr.
	* src/main.c (main): Fix it by deferring debugfile change.  Also,
	defer closing streams until after module tracing is done.
	* modules/gnu.c (debugfile): Make message consistent with command
	line.
	* doc/m4.texinfo (Invoking m4): Touch up the documentation.
	* NEWS: Document this fix.

	* modules/m4.c (dnl): Include macro name in warning message.
	* m4/input.c (m4_skip_line): Add parameter.
	* m4/m4module.h (m4_skip_line): Likewise.
	* src/main.c (usage): Update wording.
	* doc/m4.texinfo (Inhibiting Invocation): Add xfailed test until
	issue of blind macros vs. POSIX is resolved.
	(Dnl): Merge another node from branch.

	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	xstrtol.
	* m4/system_.h (N_): Define.
	* src/main.c (main): Validate numeric arguments.
	(size_opt): New function, idea borrowed from coreutils.
	* m4/macro.c (expand_macro): -L0 implies no limit.
	* doc/m4.texinfo (Invoking m4): Document this change.
	* NEWS: Likewise.
	* tests/options.at: (--arglength, --nesting-limit)
	(--regexp-syntax): New tests of argument validation.

2006-09-28  Eric Blake  <ebb9@byu.net>

	* tests/options.at: Alphabetize the tests.

2006-09-27  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_symbol_value_print, m4_symbol_print): Add
	another parameter to print module info.
	* m4/macro.c (trace_pre): Adjust caller.
	* modules/m4.c (M4BUILTIN_HANDLER): Likewise.
	* doc/m4.texinfo (Dumpdef, Debug Levels): Document this.
	* NEWS: Document this.

	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	strnlen.
	* m4/symtab.c (symbol_value_print): Rename to...
	(m4_symbol_value_print): ...this, and...
	(m4_symbol_print): Update to allow -L length truncation.  Now
	truncation also affects dumpdef output and builtin names.
	* m4/m4private.h (nesting_limit, max_debug_argument_length):
	Switch to size_t.
	* m4/m4module.h (m4_symbol_print): Add parameter.
	(m4_symbol_value_print): New function.
	* modules/m4.c (dumpdef): Allow length truncation.
	* m4/macro.c (trace_pre): Use m4_symbol_print, rather than
	repeating code.
	* doc/m4.texinfo (Invoking m4): Document -l better.
	(Dumpdef, Debug Levels): Document the effect of -l.
	* NEWS: Document this change.

	* modules/m4.c (m4_dump_symbols, errprint, m4wrap)
	(m4_expand_ranges): Ensure we aren't picking up partial object on
	obstack.
	* modules/stdlib.c (setenv): Allow extra arguments.
	* modules/time.c (ctime): Avoid side effect in call to
	obstack_grow.
	* modules/gnu.c (m4_regexp_substitute): Likewise.
	(renamesyms): Avoid extra obstack_init.
	* src/freeze.c (reload_frozen_state): Remove debug comment.
	(produce_frozen_state): Simplify fprintf to puts where possible.
	* modules/modtest.c (modtest_init, modtest_finish): Likewise.
	* modules/import.c (import, symbol_fail, modules_fail): Likewise.
	* m4/macro.c (trace_flush): Likewise.
	* m4/debug.c (m4_debug_message_prefix): Likewise.
	* m4/path.c (include_dump): Likewise.
	* m4/module.c (module_remove): Likewise.
	(install_builtin_table): Simplify malloc and string
	concatenation.

2006-09-26  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_symbol_print): New prototype.
	(M4_DEBUG_TRACE_STACK): New enumerator.
	(m4_is_debug_bit): Allow use without requiring m4private.h.
	* m4/symtab.c (symbol_value_print, m4_symbol_print): New
	functions.
	* modules/m4.c (dump_symbol_CB, m4_dump_symbols): Speed up
	callback.
	(dumpdef): Allow printing pushdef'd stacks.
	* m4/debug.c (m4_debug_decode): Add new 's' debug mode.
	* src/main.c (usage): Document it.
	* doc/m4.texinfo (Dumpdef, Debug Levels): Likewise.
	* NEWS: Likewise.

	* configure.ac (AC_CONFIG_HEADERS): Place <config.h> with other
	gnulib headers.
	* Makefile.am (AUTOMAKE_OPTIONS): Add nostdinc, to reduce length
	of lines during make.
	(AM_CPPFLAGS): Remove unneeded include path.
	(src_m4_CPPFLAGS): Remove redundant include path.
	* m4/system_.h Make preprocessor indentation consistent.
	(M4_DIRSEP_CHAR, M4_PATHSEP_CHAR, M4_GNUC_FORMAT): Remove unused
	macros.
	(UNIX, W32_NATIVE, OS2): Update platform recognition macros from
	branch.
	(M4_GNUC_PRINTF, M4_GNUC_SCANF, M4_GNUC_NORETURN)
	(M4_GNUC_CONST, M4_GNUC_UNUSED): Mangle names properly for header.
	(bool, true, false): Don't undefine here; stdbool takes care of
	that.
	* src/m4.h (includes): Assume config.h, and several standard
	headers.
	(__CYGWIN__, WIN32): Don't define here; let system.h do it.
	* m4/m4private.h: Assume config.h.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* m4/resyntax.c: Likewise.
	* m4/utility.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/import.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/modtest.c: Likewise.
	* modules/mpeval.c: Likewise.
	* modules/perl.c: Likewise.
	* modules/shadow.c: Likewise.
	* modules/stdlib.c: Likewise.
	* modules/time.c: Likewise.
	* modules/traditional.c: Likewise.

2006-09-21  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Invoking m4): Add clarification on option
	processing behavior.
	* tests/options.at (option grouping): Test this.
	* THANKS: Update.
	Reported by Mikhail Teterin.

	* bootstrap: Add --force option, based on idea from coreutils.
	* README: Document that ./bootstrap and autoreconf are for
	developers, and not lightly done in tarballs.

2006-09-20  Eric Blake  <ebb9@byu.net>

	* src/main.c (usage, OPTSTRING, main): Rename -e to -i.  Make
	warnings consistent.
	(long_options, HASHSIZE_OPTION): Warn on -H.
	* doc/m4.texinfo (Invoking m4): Document this.
	* tests/options.at (deprecated options): Update.

	Change the default of interactive sessions to match sh.
	* src/main.c (usage): Document this.
	(enum interactive_choice): New enum.
	(main): Use it to defer decision of interactive until after
	argument processing.
	* doc/m4.texinfo (Invoking m4): Document this.
	* NEWS: Likewise, plus add missing mention of -b.
	Reported by Stepan Kasal.

2006-09-19  Eric Blake  <ebb9@byu.net>

	* src/main.c (usage, main, DEBUGFILE_OPTION): Deprecate -o as
	well as --error-output; the goal is to add -o/--output in some
	future version with semantics like gcc or autom4te.
	* doc/m4.texinfo (Invoking m4, Dumpdef, Debug Output, Errprint):
	(Extensions): Reflect this update.
	(Renamesyms): Add another test.
	(Defn): Xfail for now, so that `make check' is happy.
	* NEWS: Document this change.
	* tests/generate.awk: Mark dynamic loading tests as such.  Allow
	xfailing tests.
	* tests/macros.at (Renamesyms collisions): New test, exposing
	renamesyms' coredump.
	* tests/options.at (--debugfile, --safer): Update to match
	change.

	* m4/debug.c (set_debug_file): Fix regression in -o when stdout
	and stderr are same file, introduced 2003-07-23.
	* tests/options.at (--debugfile): New test, to catch the bug.
	(deprecated options): Test --error-output.
	* src/main.c (usage, main, long_options, ERROR_OUTPUT_OPTION):
	Deprecate --error-output, and replace it with --debugfile.
	* doc/m4.texinfo (Invoking m4, Debug Output, Dumpdef, Errprint):
	Document this change.
	* NEWS: Likewise.

2006-09-18  Eric Blake  <ebb9@byu.net>

	* modules/load.c (modules): Rename to...
	(m4modules): ...this, since it is an English word with 0
	arguments.
	* modules/gnu.c (symbols, m4symbols): Likewise.
	* doc/m4.texinfo (Listing Modules): Rename to...
	(M4modules): ...this.
	(Symbols): Rename to...
	(M4symbols): ...this.
	(Load, Foreach, Trace, Answers): Update to new spellings.
	* NEWS: Document this.

	* modules/m4.c (traceon, traceoff): Change to Solaris semantics,
	such that without arguments, the global trace flag is changed
	rather than walking the table of all currently-defined macros.
	(set_trace_CB): No longer needed.
	* m4/m4module.h (m4_set_symbol_name_traced): Add a parameter.
	(m4_set_symbol_traced): Delete.
	(m4_symtab_create): Nuke the nuke parameter.
	* m4/m4private.h (m4_get_symbol_value): Delete.
	* m4/symtab.c (m4_symbol_popdef): No more need for nuke_trace.
	(m4_set_symbol_name_traced): Free undefined entries that are no
	longer traced.
	(symbol_destroy_CB): Update caller.
	* m4/m4.c (m4_create): Update caller.
	* src/main.c (main): Likewise.
	(usage): Fix typo in last commit.
	* doc/m4.texinfo: Minor cleanups throughout.
	(Debugging, Dumpdef, Trace, Debug Levels, Debug Output): Merge
	more nodes from branch.
	(Trace): Document new semantics, and how to simulate the old.
	* tests/builtins.at (multiquotes): Adjust to new semantics.
	* NEWS: Update somewhat.

2006-09-14  Eric Blake  <ebb9@byu.net>

	Add --safer option, per debian bug 5898.
	* src/main.c (usage): Document new option.
	(SAFER_OPTION): New enumerator.
	(main): Set the option bit.
	* m4/m4module.h (m4_context_opt_bit_table): Declare new bit
	accessors.
	* m4/m4private.h (M4_OPT_SAFER_BIT): New macro.
	(m4_get_safer_opt): New accessor.
	* modules/gnu.c (esyscmd, debugfile): Disable when --safer.
	* modules/m4.c (syscmd, maketemp): Likewise.
	* doc/m4.texinfo (Invoking m4, Debug Output, Syscmd, Esyscmd)
	(Sysval, Maketemp): Add tests of this.
	* tests/options.at (--safer): Likewise.

2006-09-13  Eric Blake  <ebb9@byu.net>

	* tests/modules.at (AT_CHECK_M4_MODTEST): Use AT_CHECK_M4, for
	stderr filtering.
	Reported by Ralf Wildenhues.

	Fix installcheck.
	* Makefile.am (check_LTLIBRARIES): Build test libraries in the
	tests directory, so we can be sure an installed build is not
	picking up uninstalled non-test libraries.
	(check-local, installcheck-local): Depend on test libraries.
	* tests/modules.at (AT_CHECK_M4_MODTEST): Don't use options
	after file name.  Fix quoting.  Remove skipping the test, now
	that makefile guarantees test modules will exist.
	(Freezing modules, modules: shadow, modules: unload)
	(modules: trace): Always put test modules in module path.
	(modules: importing): Likewise, and rely on AT_CHECK_M4 for
	stderr munging.
	* src/main.c (usage): Document default module search path.
	(import_environment, frozen_file_to_read, frozen_file_to_write):
	Move...
	(main): ...here.
	* tests/testsuite.at (AT_CHECK_M4): Filter stderr here...
	* tests/m4.in: ...not here.
	Reported by Ralf Wildenhues.

2006-09-08  Eric Blake  <ebb9@byu.net>

	* bootstrap: Kill unrelated copy-n-paste code from argument
	parsing.  Let Makefile generate testsuite.
	* Makefile.am (EXTRA_DIST): Remove examples/WWW/man/Makefile.

2006-09-07  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_peek_input): No longer export.
	(m4_error_at_line, m4_warn_at_line): New prototypes.
	(m4_is_symbol_void): New macro.
	(m4_push_file): Update prototype.
	* m4/m4private.h (m4__peek_token): New prototype.
	(M4_TOKEN_OPEN, M4_TOKEN_COMMA, M4_TOKEN_CLOSE): New enumerators.
	* m4/utility.c (m4_error_at_line, m4_warn_at_line): New functions.
	* src/main.c (main): Allow reading from stdin twice.
	* modules/m4.c (include): Adjust to new prototype.
	* m4/input.c: General comment cleanup.
	(file_peek, file_read, file_unget, push_file): Set end flag on
	EOF, so that we don't call getc twice.
	(push_file, file_clean): Port fix from branch to avoid closing
	stdin prematurely.
	(pop_input): Port fix from branch to avoid reading free'd memory
	when input ends mid-string.
	(m4_pop_wrapup): Port fix from branch to allow multiple m4wraps.
	(string_peek, string_read): Always use unsigned char.
	(m4_skip_line): Warn when dnl cut short by EOF.
	(peek_input): Rename from m4_peek_input.
	(match_input): Update signature, to distinguish between `(' token
	and multi-char quote or comment beginning with `('.
	(m4_input_exit): Cleanup now done in m4_pop_wrapup.
	(m4__peek_token): New function, ported from branch.
	(m4__next_token): Update to new token types.
	* m4/macro.c (expand_token, expand_argument): Use peek_token.
	* doc/m4.texinfo (Pseudo Arguments, Defn, Answers): Fix typos.
	(Invoking m4): Remerge from branch.

	* Makefile.am ($(TESTSUITE)): Revert patch from 2006-09-05...
	(check-local): and put dependency here.
	Reported by Ralf Wildenhues.

2006-09-05  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (m4_debug_message): New prototype.
	(M4_DEBUG_TRACE_MODULE): New debug bit.
	* m4/m4private.h (M4_DEBUG_MESSAGE, M4_DEBUG_MESSAGE1)
	(M4_DEBUG_MESSAGE2): Delete these macros.
	* m4/debug.c (m4_debug_message): New method.
	(m4_debug_decode): Add module tracing as flag `m'.
	* m4/input.c (m4_push_file, file_clean): Use new method.
	* m4/path.c (m4_path_search): Likewise.
	* po/Makevars (XGETTEXT_OPTIONS): Likewise.
	* m4/module.c (install_builtin_table, install_macro_table)
	(m4__module_open, module_close, module_remove): Promote several
	module debug messages outside of DEBUG_MODULES.
	(m4__module_init, module_remove) [DEBUG_MODULES]: Don't mix
	DEBUG_MODULES with normal trace output.
	* src/main.c (usage): Document new flag.
	* doc/m4.texinfo (Debug Levels): Likewise.
	* Makefile.am ($(TESTSUITE)): Add missing dependency.
	* tests/m4.in: Neutralize platform-dependent module filenames.
	* tests/options.at (--debug): Update expected output.

2006-09-05  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* doc/m4.texinfo: Fix some typos.
	* tests/others.at: Likewise.

2006-09-05  Eric Blake  <ebb9@byu.net>

	* m4/input.c (lex_debug): Remove dead code that broke compilation
	with --enable-debug.
	* m4/module.c (install_builtin_table, install_macro_table)
	(m4__module_init, m4__module_open, module_close)
	(module_remove): Fix compilation when --enable-debug.
	* m4/output.c (m4_shipout_text): Likewise.
	* ltdl/m4/debug.m4 (M4_CHECK_DEBUGGING): Preload all static
	libraries when --enable-debug.
	* configure.ac (DYNAMIC_MODULES): New variable, to pass
	information to testsuite.
	(modules to preload): Determine modules after we know whether
	shared libraries are supported.
	* tests/atlocal.in (DYNAMIC_MODULES): Substitute this into
	testsuite.
	* tests/testsuite.at (AT_CHECK_DYNAMIC_MODULE): New macro.
	* tests/modules.at (Freezing modules, AT_CHECK_M4_MODTEST)
	(modules: shadow, modules: unload, modules: importing)
	(modules: trace): Use new macro.
	* tests/builtins.at (gmp): Likewise.

	* m4/macro.c (expansion_level, macro_call_id): Change to size_t.
	All users updated.
	(expand_token): Avoid assertion just added to docs.
	(expand_macro): Track pending expansions, for when a symbol's
	definition changes during argument collection.
	(m4_macro_call, process_macro): Operate on symbol value, not
	symbol, since symbol may have changed during argument collection.
	* m4/m4private.h (m4_symbol_value): Add pending_expansions member.
	(VALUE_PENDING, SYMBOL_PENDING, VALUE_DELETED_BIT): New defines.
	(m4_get_symbol_value): Add fast macro version.
	* m4/m4module.h (M4_BUILTIN_FLAGS_MASK): New enumerator.
	(m4_macro_call): Adjust prototype.
	* m4/module.c (install_builtin_table): Check that flags are valid
	when creating builtin.
	* m4/symtab.c (m4__symtab_remove_module_references): Use
	m4_symbol_value_delete, rather than inlining it.
	(m4_symbol_value_copy): Copy placeholder text.
	(symbol_popval): Use m4_symbol_value_delete.
	(m4_symbol_value_delete): Implementation was missing when NDEBUG.
	Handle pending expansions.
	* modules/gnu.c (indir): Update to new prototype.
	* doc/m4.texinfo: Fix menus to be consistent with section names.
	(Defn): Add test that macro tokens flatten to empty string;
	triggered an assert before this patch.
	(Ifelse): Merge another node.
	(Loops): Split into...
	(Forloop, Foreach): New nodes; work is still underway on them.
	(Answers): Add more info on foreach macro; work is still underway.
	(Indir): Add test that indir collects arguments before looking up
	macro.
	* TODO: Update based on this patch.

2006-09-01  Eric Blake  <ebb9@byu.net>

	* m4/m4.c (m4_create): Fix latent bug since 2003-10-08.
	* m4/hash.h (m4_free_hash_iterator): New prototype.
	* m4/hash.c (struct m4_hash) [!NDEBUG]: Add iter member, to
	ensure we don't do unsafe things while iterating.
	(HASH_ITER, ITER_CHAIN): New accessor macros.
	(m4_hash_new, m4_hash_resize, maybe_grow): Fix malloc typing bug.
	(m4_hash_delete, m4_hash_insert): Unsafe while iterating.
	(m4_hash_remove) [!NDEBUG]: Enforce safety while iterating.
	(m4_get_hash_iterator_next) [!NDEBUG]: Track current iterators,
	to catch unsafe actions.
	(m4_free_hash_iterator): New function, to avoid memory leaks, and
	when debugging, to track safe actions.
	(m4_hash_apply): Avoid memory leak.
	* m4/symtab.c (m4_symtab_apply): Likewise.
	* ltdl/m4/gnulib-cache.m4: Remove getopt from here; it is pulled
	in manually to src/ for now.
	* tests/builtins.at (gmp): Add keyword module.
	* tests/modules.at (Freezing modules, modules: shadow)
	(modules: unload, modules: importing, modules: trace): Likewise.

2006-08-30  Eric Blake  <ebb9@byu.net>

	* m4/utility.c (m4_warn): Factor "Warning" out of messages into
	here.
	(m4_bad_argc, m4_numeric_arg): Update all callers.
	* m4/macro.c (m4_macro_call): Likewise.
	* doc/m4.texinfo (Defn, Pushdef): Fix typos in last commit.
	(Indir, Builtin, Ifdef): More doc merges.
	(Loops): Mention that documenting foreach would be nice.
	(Macro Arguments, Defn, Builtin, Ifdef, Ifelse, Changesyntax)
	(Include, Eval, Location, M4exit): s/input.m4/stdin/.
	* modules/gnu.c (indir, builtin): Warn, not error, on undefined.
	(substitute, syncoutput): Update all m4_warn callers.
	* modules/m4.c (undefine, popdef, m4_dump_symbols, defn)
	(traceon, traceoff): Make warning message consistent.
	(define, pushdef): Update all m4_warn callers.
	* tests/generate.awk: Choose file name so that documentation can
	show command-line behavior.
	* tests/builtins.at (define): Update to new wording.
	* tests/macros.at (pushdef/popdef): Likewise.
	* tests/freeze.at (loading format 1): Likewise.
	* tests/modules.at (AT_CHECK_M4_MODTEST): Likewise.

	* doc/m4.texinfo (Undefine, Defn, Pushdef): More doc merges from
	the branch.
	(Defn): Add failing test case for mixing text and builtin.
	(Renamesyms): Improve wording, and identify core dump that needs
	fixing.

2006-08-29  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Quoting Arguments, Definitions, Define)
	(Arguments, Pseudo Arguments): More doc merges from the branch.
	(Macro expansion): Turn example into test.
	(Pseudo Arguments): Add example of avoiding argument.
	* modules/m4.c (undefine, popdef): Accept multiple arguments.
	(define, pushdef): Warn on non-text macro name.
	(ifelse, m4_dump_symbols, defn, traceon, traceoff): Tweak
	warning/error messages.
	(ifdef): Ignore extra arguments.
	* m4/symtab.c (m4_symbol_value_copy): Avoid memory leak.
	(m4__symtab_remove_module_references): Check that there is no leak.
	* tests/macros.at (pushdef/popdef): Update to new message.
	* tests/builtins.at (define): Likewise.
	* tests/freeze.at (loading format 1): Likewise.
	* tests/modules.at (AT_CHECK_M4_MODTEST): Likewise.

	* m4/m4private.h (m4_get_syntax_lquote, m4_get_syntax_rquote)
	(m4_get_syntax_bcomm, m4_get_syntax_ecomm) [NDEBUG]: Use same type
	as accessor function, to avoid compiler warning.
	* m4/module.c (m4__module_open): Move declaration of variable to
	avoid compiler warning.
	* src/main.c (main): Avoid shadowing a global variable.
	* src/freeze.c (produce_symbol_dump): Avoid unused variable
	warning when NDEBUG.
	* tests/options.at (--discard-comments, --import-environment)
	(--debug, --prepend-include, --help and --version): Rename tests
	to name option tested.

2006-08-28  Eric Blake  <ebb9@byu.net>

	* m4/utility.c (m4_bad_argc): Move assertion out of hot path...
	* m4/module.c (install_builtin_table): ...to here, and add
	assertion that blind macros require arguments.
	* m4/m4module.h (struct m4_builtin): Document restrictions that
	must be met during module loading.
	* modules/gnu.c (changeresyntax, changesyntax): These are blind,
	so require an argument to avoid	triggering assertion.
	(debugfile): Tweak error message.

2006-08-25  Eric Blake  <ebb9@byu.net>

	* m4/m4module.h (M4_BUILTIN_GROKS_MACRO, M4_BUILTIN_BLIND)
	(M4_BUILTIN_SIDE_EFFECT): New enumerators.
	(struct m4_builtin): New member flags replaces groks_macro_args,
	blind_if_no_args.  min_args and max_args are now 0-based.
	Rearrange members to reduce size on platforms where function
	pointers are 64 bits but regular pointers are 32.
	(m4_bad_argc): Add argument.
	* m4/m4private.h (VALUE_SIDE_EFFECT_ARGS_BIT): New define.
	* m4/utility.c (m4_bad_argc): Simplify calculation, and take side
	effect into account.
	* m4/module.c (install_builtin_table): Adjust all users affected
	by this API change.
	* m4/macro.c (m4_macro_call): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* modules/m4.c (builtin_functions, ifelse, syscmd): Likewise.
	* modules/gnu.c (builtin_functions, builtin, esyscmd): Likewise.
	* modules/import.c (builtin_functions): Likewise.
	* modules/load.c (builtin_functions): Likewise.
	* modules/modtest.c (builtin_functions): Likewise.
	* modules/mpeval.c (builtin_functions): Likewise.
	* modules/perl.c (builtin_functions): Likewise.
	* modules/shadow.c (builtin_functions): Likewise.
	* modules/stdlib.c (builtin_functions): Likewise.
	* modules/time.c (builtin_functions, mktime_functions)
	(strftime_functions): Likewise.
	* doc/m4.texinfo (Loops): Update test now that shift is blind.
	(Macro Arguments): Fix typo in test.
	(Patsubst): Fix typo in test.
	* modules/gnu.c (m4_regexp_substitute): Don't skip empty match at
	end of string.  Fix return value when ignore_duplicates.
	* tests/builtins.at (patsubst): Fix typo in test.

	* tests/options.at (debug-flags): Update to reflect new message.
	(deprecated options, prepend-include, help and version): New
	tests.
	* tests/testsuite.at (AT_CHECK_M4): Avoid hanging testsuite if
	test omits an input file name.
	* src/main.c (long_options, main): Add -B/--prepend-include.
	(usage): Document it.
	(main): `m4 --help --version' now displays help, not version.
	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	dirname filenamecat.
	* m4/m4module.h (m4_add_include_directory): Add parameter.
	* m4/m4private.h (m4__include_init): New prototype.
	* m4/m4.c (m4_create): Put `.' on path before options are
	collected.
	* m4/path.c (includes): Assume C89.  Use gnulib for file name
	management.
	(m4__include_init): New function.
	(search_path_add): Allow prepending.
	(m4_add_include_directory, search_path_env_init): Adjust callers.
	(m4_path_search): Relative names now invoke path search, since
	`.' might not be first.
	* doc/m4.texinfo (Invoking m4, Search Path): Document new option.

2006-08-25  Bruno Haible  <bruno@clisp.org>  (tiny change)
	and Eric Blake  <ebb9@byu.net>

	* bootstrap: Run autopoint before gnulib-tool, since autopoint
	0.15 installs macros obsoleted by current gnulib.

2006-08-25  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Macro Arguments): Another section merged;
	testsuite failures now exposed.

2006-08-23  Eric Blake  <ebb9@byu.net>

	* doc/m4.texinfo (Quoted strings, Other tokens, Comments)
	(Input processing): More doc merges from the branch.
	(Regular expression syntax): Add introductory text.
	(Inhibiting Invocation): More doc merges from the branch.
	(Other tokens): Reorder after comments.
	* tests/generate.awk: Allow passing options to doc examples.

2006-08-22  Eric Blake  <ebb9@byu.net>

	* tests/options.at (debug-flags): New test.
	* m4/m4module.h (M4_DEBUG_TRACE_VERBOSE): Make sure this value is
	not negative, to distinguish failure in m4_debug_decode.
	(m4_debug_decode): Add new parameter.
	* modules/gnu.c (regexp): Slight cleanup.
	(renamesyms): Ignore excess arguments.
	(syncoutput): Make case-insensitive, warn on bad argument.
	(debugmode): Factor -+ handling out to...
	* m4/debug.c (m4_debug_decode): ...here.
	(m4_debug_message_prefix): Fix spacing.
	* src/main.c (main): Let -d option adjust flags.
	* m4/input.c (file_clean): Avoid printing empty file name.
	* doc/m4.texinfo (Syncoutput): Document new range of input.
	(Invoking m4): Document use of multiple -d flags.

	Start porting various fixes from the branch that use gnulib.
	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	binary-io cloexec close-stream fopen-safer getopt gnupload mkstemp
	regexprops-generic stdlib-safer unlocked-io.
	* m4/debug.c (m4_debug_set_output): Close debug file on exec.
	* m4/path.c (m4_path_search): Close input file on exec, reject
	empty file name, fix parameter naming.
	* m4/output.c (make_room_for): Close diversion file on exec.
	(includes): Assume C89 headers.
	(tmpfile): For now, we don't want tmpfile-safer, because we want
	clean-temp later.
	* m4/m4private.h (includes): Use various gnulib headers.
	* doc/regexprops-generic.texi: Use gnulib's copy.

	* configure.ac (AM_INIT_AUTOMAKE): Bump automake requirement.
	* AUTHORS: Add copyright.
	* ChangeLog: Likewise.
	* README: Likewise.  Require automake 1.9b or later.
	* HACKING: New file.
	* README-alpha: Add copyright.
	* THANKS: Likewise.  Update.
	* doc/STYLE: Add copyright, and tweak for changed directories.
	* modules/README: Add copyright, and tweak for libtool version.
	* examples/COPYING: New file.
	* examples/WWW/COPYING: Likewise.
	* examples/WWW/m4lib/COPYING: Likewise.
	* modules/shadow.m4: Add copyright.
	* modules/perl.m4: Likewise.
	* modules/modtest.m4: Likewise.
	* modules/stdlib.m4: Likewise.
	* modules/time.m4: Likewise.
	* modules/time2.m4: Likewise.
	* po/Makevars: Likewise.
	* tests/iso8859.m4: Likewise.
	* tests/m4.in: Likewise.
	* NEWS: Add (C) to copyright.
	* TODO: Likewise.
	* m4/system_.h: Likewise.
	* tests/atlocal.in: Likewise.
	* tests/builtins.at: Likewise.
	* tests/freeze.at: Likewise.
	* tests/generate.awk: Likewise.
	* tests/macros.at: Likewise.
	* tests/modules.at: Likewise.
	* tests/options.at: Likewise.
	* tests/others.at: Likewise.
	* tests/testsuite.at: Likewise.
	* m4/utility.c: Spell out copyright years.
	* src/main.c: Likewise.

	* doc/m4.texinfo (Bugs, Manual, Syntax): Sync from branch.

2006-08-21  Eric Blake  <ebb9@byu.net>

	* configure.ac (AC_CHECK_HEADERS_ONCE): Check for <sys/wait.h>.
	* modules/gnu.c (esyscmd): Use -1 for failure.  Set sysval to 0
	when no arguments are given, but without losing warning about 0
	arguments.
	* modules/m4.c (syscmd): Likewise.
	(includes): Assume C89.
	(m4_sysval): Make static.
	(M4_SYSVAL_EXITBITS, M4_SYSVAL_TERMSIGBITS): New macros.
	(sysval): Port calculation from branch.

2006-08-20  Eric Blake  <ebb9@byu.net>

	* m4/macro.c (expand_macro): Move argument check...
	(m4_macro_call): ...to here, so indir will warn.
	* modules/gnu.c (__program__): New macro, ported from branch.
	(builtin): Perform argument check.
	(changesyntax): Avoid out-of-bounds read.

	* modules/gnu.c (includes): Assume stdlib.h, errno.
	(m4_regexp_compile): Add no_sub parameter, avoid memory leaks.
	(substitute): Add caller parameter, avoid out-of-bounds memory
	references.
	(m4_regexp_substitute, patsubst, regexp, renamesyms): Adjust
	callers.

2006-08-16  Eric Blake  <ebb9@byu.net>

	* po/POTFILES.in: Add more files that contain translatable
	strings.
	* po/Makevars (XGETTEXT_OPTIONS): Add options to pass more
	information to translators.
	(USE_MSGCTXT): New var for gettext 0.15.
	* m4/input.c (file_clean, m4_push_file, m4__next_token): Start
	debug/trace messages in lower case.
	* m4/macro.c (expand_argument): Likewise.
	* m4/path.c (m4_path_search): Likewise.
	* src/main.c (main): Likewise.

2006-08-14  Eric Blake  <ebb9@byu.net>

	* src/main.c (usage): Document --import-environment.
	* doc/m4.texinfo (History, Invoking m4): Synchronize from branch.

2006-08-11  Eric Blake  <ebb9@byu.net>

	* bootstrap (func_get_translations): Only remove files when doing
	full update.
	(func_update_po): Avoid CDPATH problems.

2006-08-10  Eric Blake  <ebb9@byu.net>

	* bootstrap (func_get_translations): New function.
	(func_update_po): Borrow ideas from tar to correctly pull in
	translations from newer location.

2006-08-09  Eric Blake  <ebb9@byu.net>

	* bootstrap: Recent gnulib no longer has jm_* macros to worry
	about.
	* ltdl/m4/gnulib-cache.m4: Augment with gnulib-tool --import
	verror.
	* m4/m4module.h (M4ERROR, M4WARN): Delete, replaced by...
	(m4_error, m4_warn): ... these new prototypes.
	(m4_current_file, m4_current_line): Move into context, rather
	than leaving as globals.
	(m4_insert_file, m4_insert_diversion, m4_freeze_diversions)
	(m4_undivert_all, m4_input_init): Now takes context.
	* m4/utility.c (m4_error, m4_warn): New functions.
	* m4/m4private.h: Assume errno exists.
	(struct m4): Move warning_status to a bit flag,
	and add exit_status.  Adjust accessors accordingly.
	* src/main.c (print_program_name_CB): No longer needed.
	(main): Use new m4_get_fatal_warnings_opt.
	* m4/debug.c: Adjust all callers of M4WARN and M4ERROR, and abort
	instead of issuing "INTERNAL ERROR".  Pass context when needed,
	and use new accessors.
	* m4/input.c: Likewise.
	* m4/macro.c: Likewise.
	* m4/output.c: Likewise.
	* m4/utility.c: Likewise.
	* modules/evalparse.c: Likewise.
	* modules/gnu.c: Likewise.
	* modules/load.c: Likewise.
	* modules/m4.c: Likewise.
	* modules/mpeval.c: Likewise.
	* src/freeze.c: Likewise.
	* src/main.c: Likewise.
	* tests/macros.at: Adjust to new message format.
	* tests/builtins.at: Likewise.
	* tests/freeze.at: Likewise.
	* tests/modules.at: Likewise.
	* doc/m4.texinfo: Likewise.

	* configure.ac (AM_GNU_GETTEXT, AM_GNU_GETTEXT_VERSION): Require
	newer gettext 0.15.

2006-08-03  Eric Blake  <ebb9@byu.net>

	* src/stackovf.c (setup_stackovf_trap): Port patch from branch to
	gracefully handle ENOSYS.
	* TODO: Update.
	* THANKS: Update.

2006-07-28  Eric Blake  <ebb9@byu.net>

	* src/freeze.c (reload_frozen_state): Copy string when creating
	placeholder, to avoid memory corruption.
	* m4/symtab.c (symbol_popval): Avoid memory leak.
	(m4_symbol_rename): Avoid shadowing rename function.
	(dump_symbol_CB, symtab_dump) [DEBUG_SYM]: Fix compilation.
	* tests/freeze.at (reloading unknown builtin): Add test.
	* tests/generate.awk: Capture m4.texinfo line number in
	testsuite.log, not just generated.at.

	Port idea from branch that a frozen file can request an unknown
	builtin without producing a warning unless the builtin is
	actually used.
	* m4/m4private.h (m4__symbol_type): Add M4_SYMBOL_PLACEHOLDER.
	(m4_is_symbol_value_placeholder, m4_get_symbol_value_placeholder)
	(m4_set_symbol_value_placeholder): New accessors.
	* m4/m4module.h (m4_is_symbol_placeholder),
	(m4_get_symbol_value_placeholder),
	(m4_set_symbol_value_placeholder),
	(m4_get_symbol_placeholder): Likewise.
	* m4/symtab.c (m4_is_symbol_value_placeholder),
	(m4_get_symbol_value_placeholder),
	(m4_set_symbol_value_placeholder): Likewise.
	(dump_symbol_CB): Handle new symbol type.
	* m4/macro.c (trace_pre): Likewise.
	(m4_macro_call): Warn when invoking a placeholder.
	* modules/m4.c (dumpdef): Handle dumping a placeholder.
	(defn): Warn when referencing a placeholder.
	* src/freeze.c (dump_symbol_CB): Ignore placeholder when
	freezing.
	(reload_frozen_state): When reloading unknown builtin, install a
	placeholder instead of warning.
	* tests/freeze.at (loading format 1): Allow warning when
	popdef'ing undefined function.

2006-07-27  Paul Eggert  <eggert@cs.ucla.edu>  (tiny change)

	* m4/hash.c (m4_hash_string_hash): Don't case-fold in the hash
	function. Shift by 7, not 3, for consistency with
	gnulib/lib/hash.c. Don't assume hash word is 32 bits.

2006-07-27  Eric Blake  <ebb9@byu.net>

	* src/main.c (usage): Update to match branch.
	(main): Update --version info to distinguish between program name
	`m4' and package name `GNU M4'.
	(AUTHORS): Translate René Seindal's name.
	* configure.ac (TIMESTAMP): Remove now-redundant parentheses.
	* Makefile.am (doc/m4.1): Update to match branch.
	* m4/m4.c (DEFAULT_NESTING_LIMIT): Raise to 1024, to match
	branch.

	* m4/system_.h (EXIT_MISMATCH): Define.
	* src/main.c (main): Don't clear syntax table for version 1.
	(usage): Document exit status.
	* src/freeze.c (reload_frozen_state): Port GET_DIRECTIVE from the
	branch, and require V directive to appear first in file.  Fix
	broken logic for detecting F and T in version 1 files.

2006-07-22  Eric Blake  <ebb9@byu.net>

	* src/main.c (stackovf_handler): Document the problems in our
	overflow handler.
	* src/stackovf.c: Forward port changes in branch to use POSIX
	sa_sigaction when available.
	(process_sigsegv): Avoid buffer overrun when error string is
	translated, although the fact that we translate in a signal
	handler is still a bug.
	* ltdl/m4/stackovf.m4 (M4_SYS_STACKOVF): Forward port changes
	from branch to modernize checks.

	* modules/format.c (format): Avoid compiler warning that str may
	be used uninitialized.

	* m4/m4private.h (DEBUG_MODULES, DEBUG_STKOVF) [DEBUG]: Fix
	spelling.
	(DEBUG_SYNTAX) [DEBUG]: Turn on more debug.
	(DEBUG_MACRO): Remove unused macro.
	* src/stackovf.c: Avoid compiler warnings.
	* m4/input.c: Likewise.
	* m4/module.c: Likewise.
	* m4/output.c: Likewise.
	* m4/path.c: Likewise.
	* m4/symtab.c: Likewise.
	* m4/syntax.c: Likewise.

2006-07-20  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: gnulib-tool has changed again.
	Regenerate to explicitly ask for --assume-autoconf=2.60.

2006-07-19  Eric Blake  <ebb9@byu.net>

	* po/ChangeLog: Merge into main ChangeLog, then delete file.
	* THANKS: Update.

	* doc/m4.texinfo (copying): Relax restriction on front-cover and
	back-cover texts.

2006-07-17  Eric Blake  <ebb9@byu.net>

	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump requirement to
	0.14.5.

	* ltdl/m4/gnulib-cache.m4: Augment with `gnulib-tool --import
	xvasprintf'.
	* modules/format.c (includes): Use xvasprintf.h.
	(format): Make static.  Avoid buffer overflow, that can lead to
	arbitrary code execution exploit.  Only pass unsigned char to
	is*().  Support F, g, and G specifiers.
	* doc/m4.texinfo (Format): Expose buffer overrun bug.  Document
	new specifiers.

2006-07-17  Gary V. Vaughan  <gary@gnu.org>

	Ensure M4 compiles correctly with -DDEBUG, and use a single
	consistent definition of various /DEBUG_[A-Z]+/ symbols:

	* m4/input.c: Have commented out out DEBUG_INPUT only by default.
	(m4_print_token): Use m4_get_symbol_value_text and
	m4_get_symbol_value_func calls instead of obsolescent VALUE_TEXT
	and VALUE_FUNC respectively.
	(m4__next_token): Use m4_print_token call instead of obsolescent
	print_token symbol.
	* m4/module.c: Have commented out out DEBUG_MODULE only by default.
	* m4/output.c: Similarly for DEBUG_OUTPUT.
	* m4/path.c: Similarly for DEBUG_INCL.
	* m4/symtax.c: Similarly for DEBUG_SYM.
	* m4/syntax.c: Similarly for DEBUG_SYNTAX.
	* src/stackovf.c: Similarly for DEBUG_STACKOVF.
	* m4/m4private.h (DEBUG): Add DEBUG_OUTPUT and DEBUG_STACKOVF to
	preprocessor macros defined with -DDEBUG compiles.

2006-07-17  Gary V. Vaughan  <gary@gnu.org>  (tiny change)

	* bootstrap: Correct typo in --download-po argument parsing.

2006-07-15  Eric Blake  <ebb9@byu.net>

	* ltdl/m4/gnulib-cache.m4: Augment with `gnulib-tool --import
	gendocs fdl'.
	* tests/generate.awk (normalize): Recognize @tabchar.
	* doc/m4.texinfo (Top): Start merging from branch.  Remove tabs.
	Fix menus.  Upgrade FDL license from 1.1 to 1.2.  Fix overfull
	hboxes.
	(Index macro, Shell commands, Incompatiblities): Rename nodes
	from Index, UNIX commands, Other incompat.
	(Platform macros, Using frozen files, Frozen file format 1)
	(Frozen file format 2, Copying This Manual, Indices): New nodes.
	* Makefile.am (EXTRA_DIST): Distribute gendocs.
	(MAINTAINERCLEANFILES): Clean up files from gnulib.
	(doc_m4_TEXINFOS): Depend on fdl.texi.
	(web-manual): New maintainer target.

2006-07-14  Gary V. Vaughan  <gary@gnu.org>

	* doc/m4.texinfo (Modules):  RMS asked me for an explanation of
	the modular architecture of M4.  The result is paraphrased here
	for the benefit of future readers of the manual.

2006-07-14  Gary V. Vaughan  <gary@gnu.org>  (tiny change)

	* Makefile.am (TESTSUITE_AT): Add missing tests/freeze.at.

2006-07-14  Eric Blake  <ebb9@byu.net>

	* src/main.c (main): Avoid compiler warning.
	* modules/gnu.c (renamesyms): Remove unused variable.

2006-07-14  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4module.h (m4_regexp_syntax_decode, m4_regexp_syntax_encode)
	(m4_get_regexp_syntax_opt, m4_set_regexp_syntax_opt): Declare
	new functions for managing regexp syntax options.
	* m4/m4private.h (m4): Add regexp_syntax field.
	* m4/resyntax.c: New file implements the above.
	* Makefile.am (m4_libm4_la_SOURCES): Add m4/resyntax.c.
	* modules/gnu.c (RE_SYNTAX_BRE, RE_SYNTAX_ERE, builtin_eregexp)
	(builtin_epatsubst, builtin_erenamsyms, m4_regexp_do)
	(m4_patsubst_do, m4_renamesyms_do): Removed.
	(builtin_changeresyntax): New builtin to change regular expression
	syntax.
	(m4_resyntax_encode_safe): Factor out diagnostics code.
	* src/freeze.c (produce_resyntax_dump): New function to dump
	default regexp syntax specifier to frozen file.
	(reload_frozen_state): Updated to action 'R' directive.
	* src/main.c (usage): Describe new -r option.
	(long_options, OPTSTRING): Declare it.
	(main): Encode and store cli regexp syntax option argument.
	* tests/freeze.at (regexp syntax): New test that regexp syntax
	survives freezing.
	* tests/generate.awk (m4_pattern_allow): Updated for renamesyms.
	* doc/m4.texinfo (Erenamesyms and Renamesyms, Eregexp and Regexp)
	(Epatsubst and Patsubst): Renamed to...
	(Renamesyms, Regexp, Patsubst): ...these respectively. Updated
	documentation and added new examples.
	(Changeresyntax): New section describing changeresyntax builtin,
	and regexp syntax names.
	(Regular expression syntax): New section describing differences
	between various regular expression syntaxes.
	(Frozen files): Document 'R' directive.
	* NEWS: Updated.

2006-07-13  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap: Enhanced to work more like our other scripts:
	Add a copyright statement; support --version and --help; accept a
	--download-po option with argument as a substitute for DOWNLOAD_PO
	in the environment.

2006-07-11  Eric Blake  <ebb9@byu.net>

	* Makefile.am (doc/m4.1): Port patch from branch that avoids
	intermediate file.
	* ltdl/m4/gnulib-cache.m4: Regenerate since upstream gnulib-tool
	changed.

2006-07-10  Gary V. Vaughan  <gary@gnu.org>  (tiny change)

	* tests/builtin.at (patsubst, regexp):  Adjust these tests, now
	that `\0' is no longer accepted.

	* src/main.c (usage): Alphabetize options within their sections.

	* modules/gnu.c (m4_regexp_search, regsub, substitute)
	(esyscmd):  Improve comments.

	* modules/gnu.c (substitute): Remove old warning for \0.
	(substitute_warned): No longer required.  Removed.

	* modules/gnu.c: Put macro definitions into alphabetical order.

2006-07-07  Eric Blake  <ebb9@byu.net>

	* tests/freeze.at (loading format 1): New file, with new test.
	* tests/testsuite.at: Include it.
	* tests/macros.at (Arity, defn, and freeze): Add frozen keyword.
	* tests/modules.at (Freezing modules): Likewise.

	* configure.ac (AC_PREREQ): Autoconf 2.60 is now out.
	(AC_CHECK_HEADERS): Assume signal.h.
	(AC_CHECK_HEADERS_ONCE): Use new feature to shrink configure.
	(AC_CHECK_FUNCS_ONCE): Likewise.
	* src/m4.h (includes): Assume signal.h.

2006-07-05  Eric Blake  <ebb9@byu.net>

	Fix all testsuite failures on cygwin.
	* doc/m4.texinfo (Syscmd, Esyscmd): Forward-port updates from
	branch-1_4.  Solves testsuite failure when uninstalled m4 is
	shadowed by redefinition of PATH in libtool wrapper.
	* Makefile.am (module_ldflags): Don't forget AM_LDFLAGS, which
	contains the -no-undefined required by cygwin.
	(TESTS_ENVIRONMENT): Export abs_top_builddir.
	* tests/others.at (misc): Port to platforms where /etc/passwd
	does not exist or does not contain user named root.
	* tests/modules.at (AT_CHECK_M4_MODTEST): Look in correct
	directory.
	* tests/builtins.at (define, divert): Avoid overquoting.
	* tests/generate.awk (new_group): Likewise.

2006-07-05  Gary V. Vaughan  <gary@gnu.org>

	The regs_allocated field in a struct re_pattern_buffer refers
	to the state of a particular re_registers struct when used in
	successive matches using the same compiled pattern.  Avoid a
	SEGV in `renamesyms' resulting from using a new re_registers
	with an existing re_pattern_buffer:

	* modules/gnu.c (m4_pattern_buffer): Wrapper struct for associated
	pattern buffer and registers.
	(m4_regexp_search): New function to call re_regexp_search with
	correctly matched pattern buffer and register instantiations.
	(m4_regexp_compile): Return an m4_pattern_buffer.  Adust all
	callers.

2006-07-04  Gary V. Vaughan  <gary@gnu.org>

	* ltdl/m4/m4-getopt.m4 (M4_GETOPT): Update to take into account
	changes to gnulib getopt.m4 since last build.
	* Makefile.am (src_m4_SOURCES): Only compile shipped getopt module
	if the system getopt fails M4_GETOPT tests.

2006-06-22  Eric Blake  <ebb9@byu.net>

	* Makefile.am (EXTRA_DIST): Distribute gnulib-cache.m4.
	Reported by Bruno Haible.

2006-06-22  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* m4/module.c (m4__module_exit): Avoid ltdl memory leak.

2006-06-19  Eric Blake  <ebb9@byu.net>

	* THANKS: Update.

2006-06-19  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* Makefile.am (src_m4_DEPENDENCIES): Make dependency explicit.
	(clean-local): Split into and depend upon...
	(clean-local-tests, clean-local-src): ...these two.  The latter
	removes the libtool object directory below `src', to work around
	a buglet in Automake, failing to list it.
	(EXTRA_DIST): Distribute modules/perl.c.

2006-06-19  Eric Blake  <ebb9@byu.net>

	* Makefile.am ($(srcdir)/doc/m4.1): No need to list $(srcdir) in
	right side of dependency; VPATH does that.
	(stamp-vcl): Update to use libtool's algorithm.
	(EXTRA_DIST): Distribute stamp-vcl.
	Reported by Ralf Wildenhues.
	(TESTSUITE): Revert earlier change that used absolute path, as
	that broke 'make dist' in VPATH.  Stick with $(srcdir) instead.
	(EXTRA_DIST): Revert earlier change of $(TESTSUITE).
	(TESTS_ENVIRONMENT) [USE_GMP]: Revert earlier addition, since
	atlocal takes care of it instead.
	(check-local, installcheck-local, clean-local): Inline absolute
	path to testsuite here, rather than relative path to testsuite
	elsewhere.

2006-06-19  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* m4/m4private.h (DELETE): Cast away const here...
	* src/stackovf.c (stackovf_exit): ...to avoid cast-as-lvalue here.
	* src/freeze.c (reload_frozen_state): Avoid uninitialized
	variable warning.

2006-06-19  Eric Blake  <ebb9@byu.net>

	* Makefile.am (doc/m4.1): Build in $(srcdir), to match where
	.info pages are built.
	Reported by Ralf Wildenhues.
	(EXTRA_DIST): Inline definition of testsuite, so that make dist
	works again.

2006-06-16  Eric Blake  <ebb9@byu.net>

	Follow recommendations from autoconf manual for autotest.
	* Makefile.am (TESTSUITE): Factor the $(srcdir) out of uses, and
	turn it into an absolute path until autotest provides an option
	that allows us to avoid changing directories.  Properly quote
	throughout.
	(TESTS_ENVIRONMENT) [USE_GMP]: Inform testsuite about GMP.
	(check-recursive): Delete unused target.
	($(TESTSUITE)): Atomically update testsuite.
	(CD_TESTDIR): Simplify.
	(m4__cd): Delete unused macro.
	(check-local): Let TESTSUITEFLAGS influence the run.
	(installcheck-local): Let TESTSUITEFLAGS override
	AUTOTEST_PATH.  Add dependencies.
	(clean-local): Clean up.
	(DISTCLEANFILES, MAINTAINERCLEANFILES): Add directory location.
	* README: Document how to use the testsuite.

2006-06-15  Eric Blake  <ebb9@byu.net>

	* configure.ac (M4_DEFAULT_PRELOAD): Fix typo in last commit.

	* ltdl/m4/m4-error.m4 (M4_ERROR): Use M4_ instead of m4_ to avoid
	clashes with m4sugar.
	* ltdl/m4/m4-getopt.m4 (M4_GETOPT): Likewise.
	* ltdl/m4/m4-gettext.m4 (M4_GNU_GETTEXT): Likewise.
	* ltdl/m4/m4-obstack.m4 (M4_OBSTACK): Likewise.
	* ltdl/m4/m4-regex.m4 (M4_REGEX): Likewise.
	* ltdl/m4/gmp.m4 (_M4_LIB_GMP): Likewise.
	* ltdl/m4/stackovf.m4 (M4_SYS_STACKOVF): Likewise.
	* ltdl/m4/debug.m4 (M4_CHECK_DEBUGGING): Likewise.
	* configure.ac: Likewise.
	(M4_DEFAULT_PRELOAD): Use as a macro, not shell variable.
	* Makefile.am (src_m4_CPPFLAGS): Use STACKOVF as a makefile
	conditional.
	* ltdl/m4/m4-gnulib.m4: Delete, no longer needed.

	Reduce compiler warnings.  Inside GMP, mpq_t is an array type, so
	const mpq_t is not assignable from plain mpq_t.  Avoid
	type-punning warnings caused trying to mix these types.
	* modules/mpeval.c (numb_ior, numb_eor, numb_and, numb_lshift),
	(numb_rshift, numb_divide, numb_modulo): Remove const qualifier.
	* modules/evalparse.c (or_term, xor_term, and_term, shift_term),
	(mult_term, exp_term): Remove type-punning casts.
	(numb_pow): Remove const qualifier.
	* src/freeze.c (reload_frozen_state): Fix typo in messages.
	Fix variables that can be used uninitialized, which fixes
	security hole where malicious frozen file can execute arbitrary
	code.

2006-06-14  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* Makefile.am (modules_mpeval_la_LIBADD): Readd $(LIBADD_GMP).

2006-06-13  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>
	and Eric Blake  <ebb9@byu.net>

	Allow `make dist' to work again.
	* Makefile.am (EXTRA_DIST): doc/helptoman.pl is gone.
	(MAINTAINERCLEANFILES): Avoid redundant mention of dist_man_MANS.
	(cvs-dist): Fix typo.
	* NEWS: Match current version number.

2006-06-13  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* Makefile.am (AM_CPPFLAGS):  Add $(LTDLINCL), so the right
	ltdl.h is used.

	* bootstrap: Do not run libtoolize manually, this is done
	correctly by autoreconf.  Invoke autoreconf with --no-recursive
	to avoid unnecessary rerunning of autotools for libltdl.

2006-06-13  Eric Blake  <ebb9@byu.net>

	* THANKS: Update.

2006-06-12  Eric Blake  <ebb9@byu.net>

	* m4/output.c [HAVE_MKTEMP]: Gnulib provides mkstemp, so don't
	bother with mktemp.
	* src/m4.h: Don't declare mktemp.
	* m4/input.c (m4__next_token): Avoid bzero.
	* configure.ac (AC_CHECK_FUNCS): Remove obsolete checks.
	* Makefile.am (doc/m4.1): Depend on installed help2man, rather
	than distributing outdated helptoman.pl.
	* doc/helptoman.pl: Delete.

2006-06-10  Eric Blake  <ebb9@byu.net>

	* README (Patches): Document the current dependence on CVS
	builds of autotools.
	* ltdl/m4/gnulib-cache.m4: Update, and use --macro-prefix=M4.
	* configure.ac: Use consistent quoting throughout.
	(AC_PREREQ): Bump to 2.59d.
	(AC_INIT): Package name begins with uppercase.
	(AC_ARG_WITH): Use AS_HELP_STRING.
	(AM_INIT_AUTOMAKE): Enable gnits mode.
	(AC_ISC_POSIX, AM_PROG_CC_STDC, AC_PROG_INSTALL, AC_PROG_MAKE_SET),
	(AC_PROG_AWK, AM_C_PROTOTYPES, AC_C_CONST, AC_HEADER_STDC),
	(AC_CHECK_HEADERS, AC_FUNC_ALLOCA, AC_FUNC_VPRINTF): Remove checks
	done by gnulib or automake, or which autoconf has declared
	obsolete.
	* m4/m4private.h (Includes): Assume C89 or better, and use errno
	unconditionally.
	* m4/output.c (Includes): Likewise.
	* modules/gnu.c (Includes): Likewise.
	* modules/m4.c (Includes): Likewise.
	* src/m4.h (Includes): Likewise.

	* README-alpha: Update web address.
	* README: Likewise. Change encoding to ASCII.  Remove old advice
	about cygwin.  Document bootstrapping dependency.
	* AUTHORS: Update from branch-1_4.
	* THANKS: Likewise.  Change encoding to UTF-8.
	* BACKLOG: Delete.  This file is too old and unmaintained to be
	worthwhile.
	* ChangeLog: Change encoding to UTF-8.

	Avoid compiler warnings.
	* m4/macro.c (trace_format): Don't mark this as a printf format,
	since we don't accept the same set of modifiers as printf.  It
	would be nice if gcc let us specify a custom format archetype.
	* src/main.c (main): Cast away const.

2006-06-10  Andreas Schwab  <schwab@suse.de>  (tiny change)
	    Eric Blake  <ebb9@byu.net>

	* modules/time.c (ctime): Pass correctly typed variable to
	m4_numeric_arg.
	(gmtime): Likewise.
	(localtime): Likewise.
	(strftime): Likewise.
	* m4/utility.c (m4_numeric_arg): For now, document arbitrary
	limit inherent in this interface.

2006-05-08  Bruno Haible  <bruno@clisp.org>  (tiny change)

	* modules/m4.c (WEXITSTATUS): Provide fallback definition.
	(sysval): Use WEXITSTATUS.
	* modules/gnu.c (esyscmd): Set sysval to 0xffff, to accomodate both
	big-endian and little-endian wait status definitions.

2006-05-06  Eric Blake  <ebb9@byu.net>

	* po/Makevars (MSGID_BUGS_ADDRESS): Add.
	* po/POTFILES.in (src/getopt.c, src/version-etc.c): These files live
	in src, not gnu.

2006-05-06  Eric Blake  <ebb9@byu.net>

	* configure.ac (LT_CONFIG_LTDL_DIR): Inform libtool which
	subdirectory to use.
	(support for -pipe): Move after LT_INIT, since it relies on
	libtool internals.

2006-05-05  Eric Blake  <ebb9@byu.net>

	* Makefile.am (doc/m4.1): Use $@, not $(srcdir)/doc/$@.

	* THANKS: Update.

2006-05-05  Bruno Haible  <bruno@clisp.org>
	and Eric Blake  <ebb9@byu.net>

	* configure.ac (gl_SOURCE_BASE, gl_M4_BASE, gl_MODULES): Move to...
	* ltdl/m4/gnulib-cache.m4: ...this new file, per new gnulib-tool
	usage pattern.
	* bootstrap: Update usage of gnulib-tool.

2006-05-04  Eric Blake  <ebb9@byu.net>

	* Makefile.am (doc/m4.1): Use EXEEXT on built binary.
	Cleanup whitespace.

2005-12-05  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap (func_update_po): Synch with CVS GNU tar.  wget 1.9.x
	and 1.10.x support --cache=off, so $WGETFLAGS are not necessary.
	Reported by Eric Blake <ebb9@byu.net>

2005-12-04  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap (func_update_po): Test and set $WGETFLAGS to disable
	http caching as -C is no longer supported by wget 1.10.x.
	Reported by Eric Blake <ebb9@byu.net>

2005-10-20  Gary V. Vaughan  <gary@gnu.org>

	* m4/module.c (caller_id): To match libtool-2.0 interface, changed
	to ...
	(iface_id): ...an lt_dlinterface_id type.
	(m4__module_find): New abstraction for lt_dlhandle_fetch.  Use
	throughout, instead of calling obsolete lt_dlhandle_find directly.
	(m4__module_next): Use multiloader-safe lt_dlhandle_iterate.  Use
	throughout, instead of calling obsolete lt_dlhandle_next.
	* m4/m4private.h (m4__module_find): Declare it.
	* m4/builtin.c (m4_builtin_find_by_name, m4_builtin_find_by_func):
	Use m4__module_next instead of obsolete lt_dlhandle_next.

2005-10-20  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap (func_update_po): Update pofiles directly from the
	translation project.
	* po/LINGUAS, po/cs.po, po/de.po, po/el.po, po/fr.po, po/it.po,
	po/ja.po, po/nl.po, po/pl.po, po/ru.po, po/sv.po: No need to store
	these files under source control anymore.
	Suggested by Eric Blake <ebb9@byu.net>

2005-07-07  Paul Eggert  <eggert@cs.ucla.edu>

	* ltdl/m4/m4-gnulib.m4: Update FSF contact address.  Somehow this
	file escaped the address updates on 2005-05-01.

2005-07-07  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap: Allow user overriding of gnulib-tool location, and
	correctly determine module source directories whether gnulib-tool
	is given as a relative or absolute path, or is found by searching
	PATH.
	Reported by Eric Blake <ebb9@byu.net>

2005-07-07  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>

	* ltdl/m4/debug.m4 (m4_CHECK_DEBUGGING): Make sure that both $rm
	and $RM are defined for various versions of
	AC_LIBTOOL_COMPILER_OPTION.

	* bootstrap (AUTORECONF): New variable to allow user overriding of
	autoreconf path.

2005-07-07  Gary V. Vaughan  <gary@gnu.org>

	* doc/m4.texinfo (History): Add better notes on the ancestory of
	GNU m4, and other historical interest.

2005-05-08  Gary V. Vaughan  <gary@gnu.org>

	* m4/symtab.c (m4_symbol_rename): New function that performs a low
	level symbol rename.
	* m4/m4module.h (m4_symbol_rename): Declare it as part of the API.
	* modules/gnu.c (regsub): Factored out of m4_epatsubst_do...
	(m4_patsubst_do, m4_renamesyms_do): ...wrappers that use
	regsub...
	(erenamesyms, renamesyms): ...builtins that use these to implement
	macro renaming by regular expression.
	* doc/m4.texinfo (Erenamesyms and Renamesyms): Document them.
	* tests/generate.awk: Allow some forbidden `m4_' prefixed symbols
	to stop the new generated tests from choking.

2005-05-07  Gary V. Vaughan  <gary@gnu.org>

	Since most of the build is handled from a single Makefile.am now,
	we can teach make about the dependencies between the m4 binary and
	the preopened modules it is built against:

	* configure.ac (PREOPEN_DEPENDENCIES): Substitute for a list of
	preopened modules.
	* Makefile.am (src_m4_DEPENDENCIES): Rebuild the m4 program if any
	of the preopened modules have changed.

2005-05-07  Gary V. Vaughan  <gary@gnu.org>

	* configure.ac (gl_MODULES): Add mkstemp for machines that don't
	have a native implementation.

2005-05-06  Gary V. Vaughan  <gary@gnu.org>

	* src/m4.h (EXIT_SUCCESS, EXIT_FAILURE): Removed.  These are
	handled already by gnu/exit.h.

	* configure.ac (gl_MODULES): Add assert to support a
	--disable-assert configure time option for NDEBUG setting.

	* Makefile.am (src_m4_SOURCES): Add version-etc-fsf.c.
	* bootstrap (src_modules): Add version-etc-fsf.
	* src/main.c (version_etc_copyright): Removed.

	* ltdl/m4/m4-getopt.m4 (m4_GETOPT): Synch with gnulib/getopt.m4.

2005-05-04  Gary V. Vaughan  <gary@gnu.org>

	* src/m4.h (__CYGWIN__, WIN32): Canonicalise Windows and Cygwin
	recognition macros.
	* src/freeze.c (produce_frozen_state): Use \n line-endings even
	on Windows, so that the frozen file reader will work.
	Reported by Josef T. Burger <bolo@bolo.com>

2005-05-04  Vincent Lonngren  <Vincent.lonngren.759@student.lu.se>

	Forward port of a patch that allowed m4-1.4.2 to compile on
	QNX 6.3:

	* configure.ac (AC_CHECK_HEADERS):  Add signal.h,
	sys/signal.h.
	* src/m4.h: And include them as appropriate.
	* src/main.c, src/stackovf.h: Don't include signal.h literally;
	m4.h will include the correct file.

2005-05-04  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4private.h: Make errno visible for the sources patched
	below.

2005-05-04  Paul Eggert  <eggert@twinsun.com>

	* src/main.c (print_program_name_CB): Preserve errno, since
	M4ERROR relies on this.
	* modules/gnu.c (m4_esyscmd): Clear errno before calling popen.
	* modules/m4.c (m4_maketemp): Clear errno before calling mkstemp.
	* m4/path.c (m4_path_search): Don't let "free" trash errno when
	returning NULL.

	* m4/output.c (m4_insert_file): Don't assume errno has a valid
	value simply because fread returns zero.  This fixes a
	portability bug reported by Marion Hakanson in
	<http://lists.gnu.org/archive/html/bug-m4/2004-07/msg00029.html>.

2005-05-04  Santiago Vila  <sanvila@debian.org>

	* tests/stackovf.test: Use tempfile if available.

2005-05-04  Robert Bihlmeyer  <robbe@orcus.priv.at>  (tiny change)

	http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=92629
	* m4/output.c (m4_insert_file): Do not mix buffered and
	unbuffered I/O, as this breaks on the Hurd.

2005-05-04  Gary V. Vaughan  <gary@gnu.org>

	Gnulib has changed again.  Reimport.  Adjust.  Rinse.  Repeat.
	Automake and Libtool now agree on subdir-objects and LTLIBOBJS,
	and libtoolize does a better job of ltdl importing now too, so
	take advantage of that while updating the tree:

	* acm4, config: Moved from here...
	* ltdl/m4, ltdl/config: ...to here.
	* doc/Makefile.am, m4/Makefile.am, modules/Makefile.am,
	src/Makefile.am, tests/Makefile.am: Removed...
	* Makefile.am: ...and migrated to here, with adjustments to
	compensate for relative path differences.
	* commit: Adjust relative paths.
	* configure.ac: Adjust relative paths.
	(AC_PREREQ): 2.59 isn't strictly new enough, we also need a
	patch.
	(LT_PREREQ): 2.0 isn't released yet, but will work when it is!  In
	the meanwhile, CVS HEAD libtool is needed.
	(AM_INIT_AUTOMAKE): Added subdir-objects declaration. 1.9.5 isn't
	stricly new enough, we also need a patch.
	(AM_PROG_CC_C_O): Required for subdir-objects in Automake.
	(AC_WITH_LTDL): Replaced with LT_WITH_LTDL.
	(gl_MODULES): Don't list getopt and version-etc, as they don't
	belong in libm4.
	* bootstrap: After running gnulib-tool to import the listed
	modules, fetch getopt and version-etc into src manually.
	(ltdldir): Change to ltdl.
	* src/main.c: Adjust for changes in version-etc API.
	* ltdl/m4/m4-getopt.m4: New macro to mirror gnulib's getopt.m4,
	but works when the getopt module isn't to be included in the lib.
	* README: Add note about patching autoconf and automake to
	bootstrap CVS m4.

2005-05-02  Matt Kraai  <kraai@debian.org>  (tiny change)

	http://bugs.debian.org/cgi-bin/bugreport.cgi?bug=84416
	* doc/m4.texinfo (Maketemp): Change maketemp to refer to a new,
	empty file rather than to a nonexistent file.  This closes a
	common security hole.
	* modules/m4.c (m4_maketemp): Implement the above, by using
	mkstemp rather than mktemp.

2005-05-01  Gary V. Vaughan  <gary@gnu.org>

	The FSF are moving offices today.  Changed their contact address
	in all files from `59 Temple Place, Suite 330, MA 02111-1307' to
	`51 Franklin Street, Fifth Floor, MA 02110-1301'.

2005-03-11  Ralf Wildenhues  <Ralf.Wildenhues@gmx.de>  (tiny change)

	* tests/Makefile (clean-local): Ignore testsuite cleanup
	failures.

2005-03-11  Per Bothner  <per@bothner.com>  (tiny change)

	* tests/Makefile (clean-local): Only run the testsuite cleanup
	if the testsuite has been generated.

2005-02-11  Stepan Kasal  <kasal@ucw.cz>

	* TODO: slight clarification of the example of qindir usage.

2005-02-08  Gary V. Vaughan  <gary@gnu.org>

	* TODO: Add qindir requirement, and defn bug.
	From Stepan Kasal  <kasal@ucw.cz>

2005-02-08  Stepan Kasal  <kasal@ucw.cz>

	* TODO: Add ``execution stack'', fix a typo.
	* doc/m4.texinfo: Typos.

2004-12-24  Eric Blake  <ebb9@byu.net>

	* configure.ac (INCLUDE_STDBOOL_H): Account for gnulib's move
	to the gnu subdirectory.
	* acm4/m4-error.m4 (INCLUDE_ERROR_H): Likewise.
	* acm4/m4-obstack.m4 (INCLUDE_OBSTACK_H): Likewise.
	* acm4/m4-regex.m4 (INCLUDE_REGEX_H): Likewise.
	* m4/system_.h: Likewise, in non-configured includes.

2004-10-14  Noah Misch  <noah@cs.caltech.edu>,
	    Gary V. Vaughan  <gary@gnu.org>

	* m4/m4.c (m4_context_field_table, m4_context_opt_bit_table):
	Protect definitions from macro expansion under -DNDEBUG by
	parenthesising the expanded function names.
	* m4/syntax.c (m4_get_syntax_lquote, m4_get_syntax_rquote)
	(m4_get_syntax_bcomm, m4_get_syntax_ecomm)
	(m4_is_syntax_single_quotes, m4_is_syntax_single_comments)
	(m4_is_syntax_macro_escaped): Similarly protect function
	definitions from macro expansion under -DNDEBUG by #undefing the
	matching macro names before each definition.  Also, move all the
	function definitions to the end of the file so that any
	invocations in the rest of the file pick up the fast macro
	versions.
	* m4/m4private.h (m4_set_symbol_table, m4_set_syntax_table)
	(m4_set_debug_file, m4_set_trace_messages)
	(m4_set_warning_status_opt, m4_set_no_gnu_extensions_opt)
	(m4_set_nesting_limit_opt, m4_set_debug_level_opt)
	(m4_set_max_debug_arg_length_opt): New fast macro versions of the
	option setter functions.

2004-09-23  Gary V. Vaughan  <gary@gnu.org>

	* po/POTFILES.in: Reflect move of gnulib files from gnulib/m4
	to gnu.

2004-09-23  Gary V. Vaughan  <gary@gnu.org>

	* src/main.c: Include gnulib files from the correct directory.

	* gnulib/*: Don't store any of the gnulib files in arch, as they
	generate spurious changes.
	* Makefile.am (ACLOCAL_AMFLAGS): Remove gnulib/acm4 since the
	gnulib macros now share our macro directory.
	(SUBDIRS): Descend into `gnu' rather than `gnulib'.
	* bootstrap: Call gnulib-tool to import from the gnulib tree.
	(gl_AC_HEADER_INT_TYPES_H, gl_AC_HEADER_STDINT_H,
	gl_AC_TYPE_UINTMAX_T): Patch gnulib.m4 to define these in terms of
	the gettext macros from autopoint that overwrite the gnulib-tool
	imported versions.  Import sources and Makefile.am into the `gnu'
	directory.  Changed all callers.
	* configure.ac (gl_EARLY, gl_SOURCE_BASE, gl_M4_BASE, gl_MODULES,
	gl_INIT): Call these gnulib-tool macros instead of the hardcoded
	for imported modules.
	* acm4/m4-error.m4, acm4/m4-gettext.m4, acm4/m4-obstack.m4,
	acm4/m4-regex.m4: Use AC_BEFORE to enforce ordering rather than
	hardcoding the gnulib macros they wrap.

2004-07-15  Gary V. Vaughan  <gary@gnu.org>

	Latest CVS libtool can preload modules in libraries, including
	its own module loaders!  Tweak m4 so that it doesn't try to treat
	libltdl's module loaders as m4 modules when freezing and on exit:

	* gnulib/acm4/*.m4: Don't store these files in arch since they
	generate spurious changes.
	* bootstrap: Simplify initial libtoolize call, since CVS
	libtoolize is smarter these days.
	* doc/Makefile.am (%.1): Make the helptoman call work with a VPATH
	build.
	* m4/module.h (m4__module_exit): Missing declaration.
	* m4/m4private.h (m4__module_next): New function declaration.
	* m4/module.c (m4__module_next): lt_dlhandle_{firs,nex}t
	encapsulation.  Changed all callers.
	(m4__module_interface): New function to verify m4 loadable module
	interfaces.
	(m4__module_init): Register the interface validator.
	(m4__module_exit): Only close my own modules.
	* modules/m4.c (unistd.h): Provide missing declaration.
	(m4_set_sysval, m4_sysval_flush, m4_dump_symbols)
	(m4_expand_ranges): More missing declarations.
	* modules/modtest.c (export_test): Ditto.
	* src/Makefile.am (AM_CPPFLAGS): Add libltdl directory.
	* src/main.c (main): Bump copyright year.
	* tests/modules.at: Fix sed syntax error.


2004-06-17  Gary V. Vaughan  <gary@gnu.org>

	Tweaking to enable compilation with latest CVS libtool and
	libltdl.  We can't just dump the library files directly into the
	m4 directory anymore now that libltdl is built from pieces itself:

	* bootstrap: Rewritten to use latest libtoolize sanely, and to
	set up libltdl subdirectory.
	* configure.ac (AC_CONFIG_AUX_DIR): Point to our own, not the
	gnulib subdirectory's config.
	(TIMESTAMP): Use $ac_aux_dir for VPATH builds.
	(m4_pattern_forbid): Remove the cruft to deal with renamed jm_
	macros from gnulib.
	(AC_LIB_LTDL): Latest libltdl is a sub-project with its own
	configure.ac, so use AC_WITH_LTDL instead.
	* Makefile.am (SUBDIRS): Add libltdl.
	* acm4/m4-regex.m4 (jm_INCLUDED_REGEX): Updated.  gnulib now uses
	gl_INCLUDED_REGEX.
	* m4/Makefile.am (AM_CPPFLAGS): Add INCLTDL.
	(libm4_la_SOURCES): Remove ltdl.c and ltdl.h.
	(libm4_la_LIBADD): Add LIBLTDL.
	* m4/ltdl.c, m4/ltdl.h: Removed.
	* m4/m4module.h: Include canonical ltdl.h.
	* po/*.po: Updated.

2004-06-14  Gary V. Vaughan  <gary@gnu.org>

	* gnulib/import: Now updates makefile fragments, and configure.ac.
	* gnulib/m4/gnulib.am: New file.  Generated makefile fragments.
	* gnulib/m4/Makefile.am: include it.
	* gnulib/acm4/intmax.m4, gnulib/acm4/longdouble.m4,
	gnulib/acm4/longlong.m4, gnulib/acm4/printf-posix.m4,
	gnulib/acm4/signed.m4, gnulib/acm4/size_max.m4,
	gnulib/acm4/wchar_t.m4, gnulib/acm4/wint_t.m4,
	gnulib/acm4/xsize.m4: New macro files from latest gnulib import.
	* gnulib/acm4/alloca.m4, gnulib/acm4/inttypes_h.m4,
	gnulib/acm4/lib-ld.m4, gnulib/acm4/lib-prefix.m4,
	gnulib/acm4/error.m4, gnulib/acm4/po.m4, gnulib/acm4/regex.m4,
	gnulib/acm4/stdbool.m4, gnulib/acm4/stdint_h.m4,
	gnulib/acm4/uintmax_t.m4, gnulib/acm4/ulonglong.m4,
	gnulib/acm4/unlocked-io.m4, gnulib/acm4/xalloc.m4,
	gnulib/acm4/free.m4, gnulib/acm4/gettext.m4,
	gnulib/acm4/glibc21.m4: Updated macro files from latest gnulib
	import.
	* gnulib/m4/getopt_int.h: New source file from latest gnulib
	import.
	* gnulib/m4/alloca.c, gnulib/m4/alloca_.h, gnulib/m4/getopt1.c,
	gnulib/m4/obstack.c, gnulib/m4/obstack.h, gnulib/m4/regex.c,
	gnulib/m4/unlocked-io.h, gnulib/m4/version-etc.c,
	gnulib/m4/xmalloc.c, gnulib/m4/getopt.c, gnulib/m4/getopt.h:
	Updated source files from latest gnulib.

2004-02-29  Gary V. Vaughan  <gary@gnu.org>

	* config/mailnotify: New file for mailing commit notifications,
	imported from cvs-utils.
	* commit: Updated from cvs-utils and tweaked for m4.

2003-12-01  Gary V. Vaughan  <gary@gnu.org>

	* config/mkstamp: Updated from CVS libtool.
	* configure.ac: Generate a gnu coding standards compliant version
	number, and use it for the banner.
	* Makefile.am (stamp-vcl): New rules to force m4 to be regenerated
	mhen the TIMESTAMP changes in ChangeLog, but the file modification
	time doesn't (e.g. in cvs commit).  Otherwise dist tarballs will
	contain the previous version number.
	* src/main.c: Make --version output conform to the GNU standard.

	* configure.ac (AM_INIT_AUTOMAKE): Require 1.7g...
	* modules/Makefile.am (gnu_la_SOURCES, load_la_SOURCES,
	m4_la_SOURCES, traditional_la_SOURCES, modtest_la_SOURCES,
	shadow_la_SOURCES, import_la_SOURCES, stdlib_la_SOURCES,
	time_la_SOURCES): ...so that these are defaulted correctly, and
	can be removed from this file.
	(AM_LDFLAGS): Add -module...
	(gnu_la_LDFLAGS, load_la_LDFLAGS, m4_la_LDFLAGS,
	traditional_la_LDFLAGS, modtest_la_LDFLAGS, shadow_la_LDFLAGS,
	import_la_LDFLAGS, stdlib_la_LDFLAGS, time_la_LDFLAGS): ...so that
	the individual settings can be removed.
	* m4/Makefile.am (libm4_la_LIBADD): Add $(LTLIBINTL) here once...
	* module/Makefile.am (gnu_la_LIBADD, load_la_LIBADD,
	m4_la_LIBADD, traditional_la_LIBADD, modtest_la_LIBADD,
	shadow_la_LIBADD, import_la_LIBADD, stdlib_la_LIBADD,
	time_la_LIBADD): ...so that these are picked up as a deplib of
	libm4 and don't need to be set explicitly.

2003-11-18  Gary V. Vaughan  <gary@gnu.org>

	* modules/Makefile.am (pkglibexec_LTLIBRARIES): Remove perl.la
	from the standard build.  It is too fragile.

	* gnulib/acm4/libtool.m4, m4/ltdl.c, m4/ltdl.h: Reimported from
	CVS libtool after merging m4 changes across to libtool.

	* m4/symtab.c (m4_symtab_create): Fix a careless use of sizeof.
	* m4/path.c (search_path_add): Ditto.

2003-11-13  Gary V. Vaughan  <gary@gnu.org>

	* configure.ac (AC_LIBTOOL_TAGS): Don't include shell code for
	libtool tags we don't use in configure.  This reduces the size
	of the script from over 1Mb to under 700Kb.

2003-11-13  Gary V. Vaughan  <gary@gnu.org>

	The import script was not written properly, and the last gnulib
	import was incomplete.  Fixed that problem, and reimport our
	gnulib dependencies, which picks up the address calculation
	overflow checks described by Paul below.  Also tweak the clients
	of the gnulib xalloc module not to use deprecated macros:

	* gnulib/import: Recurse through module dependencies rather than
	naively descending only one level.
	* configure.ac: Add calls to gnulib's strnlen and extension module
	macros.
	* gnulib/m4/Makefile.am: Add snippets from gnulib's strnlen and
	extension modules.
	* gnulib/acm4/extensions.m4, gnulib/acm4/xalloc.m4,
	gnulib/m4/alloca.c, gnulib/m4/obstack.c, gnulib/m4/obstack.h,
	gnulib/m4/stdbool_.h, gnulib/m4/unlocked-io.h, gnulib/m4/xalloc.h,
	gnulib/m4/xmalloc.c, gnulib/m4/xstrdup.c: Updated from CVS
	gnulib.
	* gnulib/acm4/libtool.m4: Updated from CVS libtool.
	* m4/hash.c (m4_get_hash_iterator_next): Use `xzalloc (S)' in
	place of `xcalloc (1, S)'.
	* m4/m4.c (m4_create): Likewise.
	* m4/m4private.h (m4_symbol_value_create): Likewise.
	* m4/symtab.c (symtab_fetch): Likewise.
	* m4/syntax.c (m4_syntax_create): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* m4/path.c (search_path_add): Eliminate use of deprecated NEW
	macro.
	* m4/symtab.c (m4_symtab_create): Likewise.

2003-11-13  Gary V. Vaughan  <gary@gnu.org>

	* tests/module.at: Comment typo.

2003-10-10  Gary V. Vaughan  <gary@gnu.org>

	* tests/modules.at (modules: importing): Apply some lateral
	thinking, and use AT_CHECK to compare the output of a sed pass
	over stderr against the canonical strerror string.

	* tests/modules.at (modules: importing): Edit the generated stderr
	output to canonicalize strerror output, before a comparison.

2003-10-10  Gary V. Vaughan  <gary@gnu.org>

	Tru64UNIX perl is sloppy with namespace pollution.  This patch is
	careful not to trip over the mess:

	* modules/perl.c: Some builds of perl install headers that contain
	`#define try __builtin_try'.  Be sure to undefine that macro
	before `m4/hash.h' gets included, which uses the `try' symbol.
	* m4/system_.h: Similarly for `bool'.  Undefine `bool', `true' and
	`false' before including `stdbool.h'.
	(DELETE):  This symbol is not in m4's namespace, and is in any
	case only used internally...
	* m4/m4private.h (DELETE): ...so move it to here.
	Reported by Martin MOKREJS <mmokrejs@natur.cuni.cz>

2003-10-08  Paul Eggert  <eggert@twinsun.com>

	Don't use XMALLOC and XCALLOC.  Once we install the
	corresponding patch into gnulib, this will fix some
	address-calculation overflow bugs on hosts where calloc (A, B)
	returns garbage when A*B overflows.

	* m4/hash.c (m4_hash_new, node_new, m4_hash_resize,
	maybe_grow, m4_get_hash_iterator_next): Replace XMALLOC with
	xmalloc, XCALLOC with xcalloc.
	* m4/m4.c (m4_create): Likewise.
	* m4/m4private.h (m4_symbol_value_create): Likewise.
	* m4/output.c (m4_output_init): Likewise.
	* m4/symtab.c (symtab_fetch, m4_set_symbol_traced): Likewise.
	* m4/syntax.c (remove_syntax_attribute): Likewise.
	* src/freeze.c (reload_frozen_state): Likewise.
	* src/main.c (main): Likewise.

2003-10-07  Gary V. Vaughan  <gary@gnu.org>

	* Makefile.am (ACLOCAL_AMFLAGS): Search in the new acm4 and
	gnulib/acm4 directories for aclocal m4 macros.
	* gnulib/Makefile.am (EXTRA_DIST): Removed.
	(MAINTAINERCLEANFILES): Add Makefile.in.
	* configure.ac (m4_GNULIB_MODULES): Use it to declare which gnulib
	modules we use.
	* acm4/m4-gnulib.m4 (m4_GNULIB_MODULES): New macro.
	* gnulib/import: New file.  Temporary script for updating gnulib
	imported files, until gnulib-tool is working.
	* gnulib/config/codeset.m4, gnulib/config/error.m4,
	gnulib/config/exitfail.m4, gnulib/config/extensions.m4,
	gnulib/config/getopt.m4, gnulib/config/gettext.m4,
	gnulib/config/glibc21.m4, gnulib/config/iconv.m4,
	gnulib/config/intdiv0.m4, gnulib/config/inttypes-pri.m4,
	gnulib/config/inttypes.m4, gnulib/config/inttypes_h.m4,
	gnulib/config/isc-posix.m4, gnulib/config/lcmessage.m4,
	gnulib/config/lib-ld.m4, gnulib/config/lib-link.m4,
	gnulib/config/lib-prefix.m4, gnulib/config/malloc.m4,
	gnulib/config/nls.m4, gnulib/config/obstack.m4,
	gnulib/config/onceonly_2_57.m4, gnulib/config/po.m4,
	gnulib/config/progtest.m4, gnulib/config/realloc.m4,
	gnulib/config/regex.m4, gnulib/config/restrict.m4.
	gnulib/config/stdbool.m4, gnulib/config/stdint_h.m4,
	gnulib/config/strerror_r.m4, gnulib/config/strndup.m4,
	gnulib/config/strnlen.m4, gnulib/config/strtol.m4,
	gnulib/config/uintmax_t.m4, gnulib/config/ulonglong.m4,
	gnulib/config/unlocked-io.m4, gnulib/config/xalloc.m4,
	gnulib/config/xstrndup.m4: Removed.
	* gnulib/acm4/alloca.m4, gnulib/acm4/codeset.m4,
	gnulib/acm4/error.m4, gnulib/acm4/exitfail.m4,
	gnulib/acm4/extensions.m4, gnulib/acm4/free.m4,
	gnulib/acm4/getopt.m4, gnulib/acm4/gettext.m4,
	gnulib/acm4/glibc21.m4, gnulib/acm4/iconv.m4,
	gnulib/acm4/intdiv0.m4, gnulib/acm4/inttypes-pri.m4,
	gnulib/acm4/inttypes.m4, gnulib/acm4/inttypes_h.m4,
	gnulib/acm4/isc-posix.m4, gnulib/acm4/lcmessage.m4,
	gnulib/acm4/lib-ld.m4, gnulib/acm4/lib-link.m4,
	gnulib/acm4/lib-prefix.m4, gnulib/acm4/malloc.m4,
	gnulib/acm4/nls.m4, gnulib/acm4/obstack.m4,
	gnulib/acm4/onceonly_2_57.m4, gnulib/acm4/po.m4,
	gnulib/acm4/progtest.m4, gnulib/acm4/realloc.m4,
	gnulib/acm4/regex.m4, gnulib/acm4/restrict.m4.
	gnulib/acm4/stdbool.m4, gnulib/acm4/stdint_h.m4,
	gnulib/acm4/strerror_r.m4, gnulib/acm4/strndup.m4,
	gnulib/acm4/strnlen.m4, gnulib/acm4/strtol.m4,
	gnulib/acm4/uintmax_t.m4, gnulib/acm4/ulonglong.m4,
	gnulib/acm4/unlocked-io.m4, gnulib/acm4/xalloc.m4,
	gnulib/acm4/xstrndup.m4: Reimported from CVS gnulib with
	gnulib/import script.
	* gnulib/m4/alloca.c, gnulib/m4/alloca_.h, gnulib/m4/error.c,
	gnulib/m4/error.h, gnulib/m4/exitfail.c, gnulib/m4/free.c,
	gnulib/m4/malloc.c, gnulib/m4/obstack.c, gnulib/m4/obstack.h,
	gnulib/m4/realloc.c, gnulib/m4/regex.c, gnulib/m4/strtol.c,
	gnulib/m4/version-etc.c, gnulib/m4/version-etc.h,
	gnulib/m4/xalloc.h, gnulib/m4/xmalloc.c: Updated from CVS
	gnulib with gnulib/import script.
	* configure.ac, gnulib/m4/Makefile.am: Manually insert anticipated
	guards ready for gnulib-tool to autoupdate on import.
	* config/debug.m4, config/gmp.m4, config/m4-error.m4,
	config/m4-gettext.m4, config/m4-obstack.m4, config/m4-regex.m4,
	config/stackovf.m4: Moved from here...
	* acm4/debug.m4, acm4/gmp.m4, acm4/m4-error.m4,
	acm4/m4-gettext.m4, acm4/m4-obstack.m4, acm4/m4-regex.m4,
	acm4/stackovf.m4: ...to here, to separate aclocal macros from
	configure time helper scripts.
	* config/error.m4: Removed; superceded by gnulib/acm4/error.m4.
	* m4/hash.c, m4/m4.c, m4/macro.c, m4/module.c, m4/output.c,
	m4/path.c, m4/symtab.c, m4/syntax, m4/system_.h, modules/m4.c,
	src/main.c, src/stackovf.c: s/xfree/free/g to comply with new
	gnulib xalloc.h.
	* src/main.c (version_etc_copyright): Only output the current
	year.
	(version_etc): Call with new variadic API.

2003-09-16  Gary V. Vaughan  <gary@gnu.org>

	* gnulib/m4/version-etc.c, gnulib/m4/version-etc.h: Import
	version-etc module from CVS gnulib.
	* po/POTFILES.in: Add gnulib/m4/version-etc.c.
	* src/Makefile.am: Build it.
	* src/main.c: Use it.

	* gnulib/m4/exit.h: Import exit module from CVS gnulib.
	* gnulib/m4/Makefile.am (pkginclude_HEADERS): Add exit.h.
	* m4/system_.h: Don't define EXIT_SUCCESS and FAILURE, include
	exit.h instead.

2003-09-15  Charles Wilson  <cygwin@cwilson.fastmail.fm>,
	    Gary V. Vaughan  <gary@gnu.org>

	* bootstrap: Separate options.
	* configure.ac (AM_GNU_GETTEXT_VERSION): Bump to 0.12.1.
	* gnulib/m4/Makefile.am (stdbool.h): Use srcdir, gnulib_srcdir is
	not set.
	* modules/Makefile.am (gnu_la_LIBADD, load_la_LIBADD)
	(m4_la_LIBADD, mpeval_la_LIBADD, traditianal_la_LIBADD)
	(modtest_la_LIBADD, import_la_LIBADD, perl_la_LIBADD)
	(shadow_la_LIBADD, stdlib_la_LIBADD, time_la_LIBADD): Add
	$(LTLIBINTL) for gettext support on cygwin.
	* src/Makefile.am (m4_LDADD): Remove $(INTLLIBS), since we now
	have $(LTLIBINTL) from the preloaded module la files.
	* README: Remove the warning about using --disable-nls on Windows
	machines.

2003-09-15  Gary V. Vaughan  <gary@gnu.org>

	* gnulib/m4/regex.c:  s/<regex.h>/"regex.h"/ or else the compiler
	picks up the system regex.h if gl_REGEX decides gnulib/m4/regex.c
	is required.

2003-09-12  Gary V. Vaughan  <gary@gnu.org>

	* doc/STYLE: Document the gnulib header naming conventions, and
	#include policy.
	* gnulib/m4/error_.h, gnulib/m4/gettext_.h, gnulib/m4/obstack_.h,
	gnulib/m4/regex_.h: Renamed to gnulib/m4/error.h,
	gnulib/m4/gettext.h, gnulib/m4/obstack.h, gnulib/m4/regex.h
	respectively.
	* gnulib/m4/Makefile.am: Remove the rules to build these headers.

	* gnulib/m4/strtol.c, gnulib/config/strtol.m4: Import strtol
	module from CVS gnulib.
	* configure.ac (AC_REPLACE_FUNCS): Remove strtol.
	(gl_FUNC_STRTOL): In favour of the module macro.

2003-09-12  Gary V. Vaughan  <gary@gnu.org>

	Replace the getopt code with CVS gnulib getopt.  The source files
	detect whether they are in a glibc environment and preprocess away
	all of the code if there is a system getopt, so we can compile
	them into the m4 executable unconditionally:

	* gnulib/m4/getopt.c, gnulib/m4/getopt1.c, gnulib/m4/getopt.h,
	gnulib/config/getopt.m4: Import getopt module from CVS gnulib.
	* configure.ac (gl_GETOPT): Use this instead of homebrew inline
	macros.
	* src/getopt.c, src/getopt1.c, src/gnu-getopt.h: Removed old
	version.
	* src/Makefile.am: Adjust.
	* src/main.c: Always include our shipped getopt.h.
	* po/POTFILES.in: Use new location of getopt.c.

2003-09-12  Gary V. Vaughan  <gary@gnu.org>

	* configure.ac (AC_CONFIG_FILES): Remove config/Makefile.
	* config/Makefile.am: Removed.  Automake 1.8 distributes the files
	in this directory automatically.
	* Makefile.am (EXTRA_DIST): Except config/mkstamp.

	* configure.ac (pkglibexecdir): Don't try and set it here, PACKAGE
	isn't set yet.
	* m4/Makefile.am (MODULE_PATH): Removed. Calculate pkglibexecdir
	inline.
	* modules/Makefile.am (pkglibexecdir): Set it here.
	(pkgmodincdir): Renamed to pkgmodincludedir).  Changed all clients.

	* gnulib/m4/regex.c, gnulib/m4/regex_.h, gnulib/config/regex.m4:
	Import regex module from CVS gnulib.
	* gnulib/config/restrict.m4: Ditto for dependee module restrict.
	* config/m4-regex.m4 (m4_REGEX): Wrap gnulib/config/regex.m4, but
	do extra substitutions for Makefile.
	* configure.ac: Use it.
	* gnulib/m4/Makefile.am: Maybe install regex.h after linking it
	from regex_.h if necessary.
	* m4/system_.h: Include the correct version of regex.h.
	* m4/regex.c, m4/regex.h, config/regex.m4: Removed legacy
	version.
	* po/POTFILES.in: Use new location of regex.c.

	* gnulib/m4/Makefile.am (EXTRA_DIST): Removed malloc.c and
	realloc.c: automake distributes these files already.

2003-09-12  Gary V. Vaughan  <gary@gnu.org>

	Replace the xstrzdup code by importing the xstrndup module from
	CVS gnulib, along with its dependencies: strndup and strnlen:

	* gnulib/m4/xstrndup.c, gnulib/m4/xstrndup.h,
	gnulib/config/xstrndup.m4: Import xstrndup module from CVS
	gnulib.
	* gnulib/m4/strndup.c, gnulib/m4/strndup.h,
	gnulib/config/strndup.m4: Ditto wrt strndup.
	* gnulib/m4/strnlen.c, gnulib/config/strnlen.m4: Ditto wrt
	strnlen.
	* gnulib/m4/Makefile.am: Add rules from newly imported modules.
	However, contrary to gnulib, we install xstrndup.h.
	* configure.ac (AC_REPLACE_FUNCS): Remove xstrzdup.
	* gnulib/lib/xstrzdup.c: Delete.  This was never a gnulib file, it
	is an artifact of the old m4 portability layer.
	* configure.ac (gl_XSTRNDUP): This is the gnulib equivalent.
	* m4/system_.h: Include xstrndup.h.
	* m4/macro.c (process_macro): Call xstrndup, not xstrzdup.

2003-09-11  Gary V. Vaughan  <gary@gnu.org>

	Reimport the latest xalloc module from CVS gnulib, and adjust the
	m4 sources to take advantage of xalloc xfree.  Also create a new
	macro DELETE with the same semantics as the old m4 XFREE macro,
	and carefully tweak callers:

	* gnulib/config/xalloc.m4, gnulib/m4/xalloc.h: Updated from CVS
	gnulib.
	* m4/utility.c (xfree): Removed.  This function is now supplied by
	gnulib xalloc.
	* m4/m4private.h (WITH_DMALLOC): Removed XFREE redefine.
	* m4/path.c (search_path_add): Use NEW macro from xalloc.h.
	* m4/symtab.c (m4_symtab_create): Ditto.
	* m4/system_.h: Removed XFREE redefine.
	(DELETE): New macro with same functionality as the original m4
	XFREE macro, but based on xalloc.h now.  Changed all callers.
	* src/main.c (main): Use XMALLOC macro.
	* m4/hash.c, m4/macro.c, m4/symtab.c, m4/syntax.c: Use xfree
	instead of XFREE.
	* m4/output.c (m4_output_exit): Use DELETE instead of XFREE.

2003-09-10  Gary V. Vaughan  <gary@gnu.org>

	Import the xalloc module from CVS gnulib, along with its
	dependencies: exitfail, malloc and realloc. We had different
	semantics for our XFREE and a function xfree() not supplied by
	gnulib, so also a bit of work to keep everything running
	smoothly:

	* configure.ac (AC_REPLACE_FUNCS): Removed xmalloc and xstrdup.
	(gl_XALLOC): Use gnulib equivalents.
	* gnulib/config/exitfail.m4, gnulib/m4/exitfail.h,
	gnulib/m4/exitfail.c: Import exitfail module from CVS gnulib.
	* gnulib/config/malloc.m4, gnulib/m4/malloc.c: Ditto wrt malloc.
	* gnulib/config/realloc.m4, gnulib/m4/realloc.c: Ditto wrt
	realloc.
	* gnulib/config/xalloc.m4, gnulib/m4/xalloc.h,
	gnulib/m4/xmalloc.c, gnulib/m4/xstrdup.c: Ditto wrt xalloc.
	* gnulib/m4/Makefile.am: Add fragment from gnulib for newly
	imported modules.
	(pkgincdir): Removed.  Use pkgincludedir instead.
	* m4/m4private.h (XFREE): xfree already checks for NULL.
	* m4/system_.h: Use xalloc module, and remove macros already
	supplied by xalloc.h.
	* m4/utility.c (xfree): xalloc does not yet implement xfree, so
	moved the old definition from m4/xmalloc.c to here for now.

2003-09-09  Gary V. Vaughan  <gary@gnu.org>

	Import the error and progname modules from CVS gnulib.  Our old
	error.c subsumed the functionality of both, so a little adjustment
	was required to accomodate the split in sources.  Also added more
	wrapper macros to choose between a system installed error.h or our
	shipped gnulib error module:

	* m4/error.c, m4/error.h: Removed.
	* m4/Makefile.am: Adjust.
	(pkgincdir): Removed.  Use pkgincludedir instead.
	* m4/module.h, src/main.c: Don't include `m4/error.h'.
	* m4/system_.h (INCLUDE_ERROR_H): Add a substitution for suitable
	error.h.
	* gnulib/m4/progname.c: Imported from CVS gnulib.
	* gnulib/m4/progname.h: Ditto.
	* src/main.c: Adjust to use progname module.
	* gnulib/m4/error.c: Imported from CVS gnulib.
	* gnulib/m4/error_.h: Ditto.
	* gnulib/m4/Makefile.am: Build the error module into our libgnu.la
	if appropriate, and link a local error.h if the system version is
	missing.
	(libgnu_la_SOURCES) Add progname module sources.
	* gnulib/config/error.m4: Imported from CVS gnulib.
	* gnulib/config/strerror_r.m4: Ditto.
	* config/m4-error.c: New file.  Wrap gnulib error.m4 but arrange
	to have ERROR_H for Makefile substitutions and tell system.h
	whether the system error.h should be used, or a locally installed
	version.
	* configure.ac (jm_PREREQ_ERROR): Replaced by a call to m4_ERROR.

2003-09-09  Gary V. Vaughan  <gary@gnu.org>

	* gnulib/m4/Makefile.am (MOSTLYCLEANFILES): Typo
	s/gettext_.h/gettext.h/.

	* bootstrap: Revert 2003-09-04 patch now that CVS autoconf and
	automake have been fixed.

	* config/m4-obstack.m4 (m4_FUNC_OBSTACK): D'oh! Now that we wrap
	gl_OBSTACK, which in turn calls AC_FUNC_OBSTACK, don't rerun bits
	of code originally snarfed from AC_FUNC_OBSTACK!!! While I'm here
	rename to m4_OBSTACK in light of wrapping gl_OBSTACK.

2003-09-09  Gary V. Vaughan  <gary@gnu.org>

	The gnulib obstack module requires the gnulib gettext module for
	systems that do not have GNU gettext installed.  Because we use
	-Ignulib/m4 in our Makefiles it is not safe to drop gettext.h in
	that directory incase it clashes with the system gettext.h.  This
	delta uses gettext_.h and extra rules in the Makefile to make a
	link to gettext.h when needed:

	* Makefile.am (auxdir): Removed.  No longer used.
	* configure.ac (ac_aux_dir): Removed AC_SUBST.  No longer used.
	(TIMESTAMP): List path to `mkstamp' literally, as ac_aux_dir has
	moved.
	(AC_CONFIG_LIBOBJ_DIR): Declare this for possible future single
	Makefile based build.
	(AC_CONFIG_AUX_DIR): Now we use gnulib/config where the majority
	of the macros are kept.
	* Makefile.am (ACLOCAL_MFLAGS): Search gnulib/config first.
	* configure.ac (AM_INIT_AUTOMAKE): Require 1.7a.
	* config/Makefile (ACLOCAL_MACROS): Removed.  Automake 1.7a
	distributes these automatically.
	* config/regex.m4 (jm_WITH_REGEX): Fixed underquoting to prevent
	warning from automake-1.7a.
	* config/debug.m4 (M4_AC_CHECK_DEBUGGING): Renamed to
	m4_CHECK_DEBUGGING for consistency with gnulib prefixes.  Changed
	all callers.
	* config/m4-obstack.m4 (M4_AC_FUNC_OBSTACK): Ditto
	wrt. m4_FUNC_OBSTACK.
	* config/stackovf.m4 (M4_AC_SYS_STACKOVF): Ditto
	wrt. m4_sys_STACKOVF.
	* config/gmp.m4 (_M4_AC_LIB_GMP, M4_AC_LIB_GMP): Ditto
	wrt. _m4_LIB_GMP, m4_LIB_GMP.
	(ac_gmp_save_LIBS, ac_cv_using_lib_gmp): Don't use autoconf's
	namespace.  Renamed to m4_gmp_save_LIBS and m4_cv_using_lib_gmp
	respectively.
	* config/m4-gettext.m4: New file to set GETTEXT_H appropriately.
	* gnulib/m4/Makefile.am: Added a new block to make an appropriate
	gettext.h link on deficient systems.
	(pkginc_HEADERS): Mention $(GETTEXT_H).
	(EXTRA_HEADERS): Mention gettext.h.
	* gnulib/config/gettext_.h: New file from gnulib's gettext.h.
	* gnulib/config/codeset.m4, gnulib/config/gettext.m4,
	gnulib/config/glibc21.m4, gnulib/config/iconv.m4,
	gnulib/config/intdiv.m4, gnulib/config/inttypes-pri.m4,
	gnulib/config/inttypes.m4, gnulib/config/inttypes_h.m4,
	gnulib/config/isc-posix.m4, gnulib/config/lcmessage.m4,
	gnulib/config/lib-ld.m4, gnulib/config/lib-link.m4,
	gnulib/config/lib-prefix.m4, gnulib/config/nls.m4,
	gnulib/config/po.m4, gnulib/config/progtest.m4,
	gnulib/config/stdint_h.m4, gnulib/config/uintmax_t.m4,
	gnulib/config/ulonglong.m4: Imported from CVS gnulib.

2003-09-05  Gary V. Vaughan  <gary@gnu.org>

	We can't mirror the gnulib directory structure here, since we need
	to be able to eg. `#include <m4/obstack.h>' from our source files,
	which is much easier if the local obstack.h is created in a
	directory named m4.  Rather than trying to symlink everything into
	the m4 directory, now we build a libtool convenience library from
	the sources we get from gnulib and link that with libm4.la:

	* gnulib/config/extensions.m4: Imported from CVS gnulib.
	* gnulib/config/unlocked-io.m4: Ditto.
	* gnulib/m4/unlocked-io.h: Ditto.
	* gnulib/m4/obstack.m4, gnulib/m4/onceonly_2_57.m4,
	gnulib/m4/stdbool.m4: All moved to gnulib/config directory.
	* gnulib/lib/obstack.c, gnulib/lib/obstack_.h,
	gnulib/lib/stdbool_.h: All moved to gnulib/m4 directory.
	* m4/strtol.c, m4/xmalloc.c, m4/xstrdup.c, m4/xstrzdup.c: Ditto.
	* m4/Makefile.am: Adjust.
	* gnulib/Makefile.am (EXTRA_DIST): Name just the additional gnulib
	macros we redistribute.
	* gnulib/m4/Makefile.am: New file.  Build libgnu.la convenience
	library among others.
	(GNULIB_SRCS, GNULIB_MACROS): Removed.
	* Makefile.am (ACLOCAL_AMFLAGS): Adjust.
	* config/m4-obstack.m4: Adjust.
	* po/POTFILES.in: Adjust.
	* configure.ac: Reformatting.  Call newly imported gnulib macros.
	* m4/builtin.c, m4/macro.c, m4/module.c, m4/utility.c: Removed
	bogus calls of `#include "m4.h"'.
	* Makefile.am: INCLUDES has been deprecated in favour of
	AM_CPPFLAGS.
	* m4/Makefile.am: Ditto.
	* modules/Makefile.am: Ditto.
	* src/Makefile.am: Ditto.

2003-09-05  Gary V. Vaughan  <gary@gnu.org>

	* config/Makefile.am: Reverting yesterdays patch for VPATH builds.

2003-09-04  Gary V. Vaughan  <gary@gnu.org>

	Migrate the obstack support into the gnulib directories for easy
	synchronisation with upstream files in gnulib:

	* config/gnu-obstack.m4: Moved from here...
	* config/m4-obstack.m4: ...to here.
	* config/Makefile.am (SPECIFIC_MACROS): Adjust.
	* m4/obstack.c, m4/obstack_.h: Moved from here...
	* gnulib/obstack.c, gnulib/obstack.h: ...to here.
	* po/POTFILES.in: Adjust.
	* gnulib/Makefile.am (GNULIB_SRCS, GNULIB_MACROS): Adjust.
	* m4/Makefile.am: Add a whole new section to link the obstack
	sources from the gnulib tree if necessary.
	* gnulib/m4/onceonly_2_57.m4, gnulib/m4/obstack.m4: New macros
	from gnulib.
	* config/m4-obstack.m4: Rewrite as a wrapper for
	gnulib/m4/obstack.m4.

2003-09-04  Gary V. Vaughan  <gary@gnu.org>

	GNU M4 currently builds with a number of files adapted from
	upstream sources.  Recently the gnulib project on savannah.gnu.org
	has pulled together a great many of these externally maintained
	files.  This delta is the beginnings of isolating those files
	maintained in gnulib to make it easy to synchronise M4 with the
	upstream files prior to releases.

	* Makefile.am (ACLOCAL_AMFLAGS): Mention gnulib/m4 macro
	directory.
	(SUBDIRS): Added new gnulib subdirectory.
	* configure.ac (AC_CONFIG_FILES): Add new gnulib tree Makefiles.
	* config/stdbool.m4: Moved from here...
	* gnulib/m4/stdbool.m4: ...to here.
	* m4/stdbool_.h: Moved from here...
	* gnulib/lib/stdbool_.h: ...to here.
	* gnulib/Makefile.am: New file.  Make sure the gnulib tree is
	distributed.
	* m4/Makefile.am: Adjust gnulib/modules/stdbool:Makefile.am based
	code to work with new stdbool_.h location.
	(gnulib_srcdir): New.

2003-09-04  Gary V. Vaughan  <gary@gnu.org>

	* config/Makefile.am (MAINTAINERCLEANFILES, ACLOCAL_MACROS)
	(STANDARD_TOOLS, SPECIFIC_MACROS): Needed `$(srcdir)/' for VPATH
	builds to work.
	(SPECIFIC_TOOLS): New variable.  Moved mkstamp to here.
	(EXTRA_DIST): Use it.

	* bootstrap: CVS autoreconf leaves file droppings.  Remove
	aclocal.m4t incase autoreconf doesn't.

2003-08-29  Gary V. Vaughan  <gary@gnu.org>

	* m4/gnu-obstack.h: Updated from CVS gnulib.  For consistency with
	the other gnulib imports, renamed to m4/obstack_.h.
	* m4/obstack.c: Updated from CVS gnulib.
	* m4/Makefile.am (EXTRA_HEADERS): Adjust.
	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Merge in additional
	header tests from gnulib obstack module.  AC_CONFIG_LINKS knows
	about vpath already, and $top_srcdir upsets CVS Automake, so the
	$top_srcdir reference was removed.

	* m4/system-h.in: For consistency with the gnulib imports, renamed
	to m4/system_.h.
	* m4/Makefile (EXTRA_HEADERS): Adjust.
	* configure.ac (AC_CONFIG_FILES): Adjust.

	* m4/stdbool_.h: New file from gnulib for systems without their
	own.
	* m4/Makefile.am: Add snippets from gnulib for C99 bool support.
	* config/stdbool.m4: New file.  Macros from gnulib for same.
	* configure.ac: Use it.

2003-08-27  Gary V. Vaughan  <gary@gnu.org>

	* config/debug.m4: `perl -pi.bak -e 's/(Copyright) (\d)/$1 (C) $2/g'`
	* config/gmp.m4: Ditto.
	* config/gnu-obstack.m4: Ditto.
	* config/stackovf.m4: Ditto.
	* m4/builtin.c: Ditto.
	* m4/debug.c: Ditto.
	* m4/error.c: Ditto.
	* m4/error.h: Ditto.
	* m4/gnu-obstack.h: Ditto.
	* m4/hash.c: Ditto.
	* m4/hash.h: Ditto.
	* m4/input.c: Ditto.
	* m4/m4.c: Ditto.
	* m4/m4module.h: Ditto.
	* m4/m4private.h: Ditto.
	* m4/macro.c: Ditto.
	* m4/module.c: Ditto.
	* m4/obstack.c: Ditto.
	* m4/output.c: Ditto.
	* m4/path.c: Ditto.
	* m4/regex.c: Ditto.
	* m4/regex.h: Ditto.
	* m4/strtol.c: Ditto.
	* m4/symtab.c: Ditto.
	* m4/syntax.c: Ditto.
	* m4/utility.c: Ditto.
	* m4/xmalloc.c: Ditto.
	* m4/xstrdup.c: Ditto.
	* m4/xstrzdup.c: Ditto.
	* modules/evalparse.c: Ditto.
	* modules/format.c: Ditto.
	* modules/gnu.c: Ditto.
	* modules/import.c: Ditto.
	* modules/load.c: Ditto.
	* modules/m4.c: Ditto.
	* modules/m4.h: Ditto.
	* modules/modtest.c: Ditto.
	* modules/mpeval.c: Ditto.
	* modules/perl.c: Ditto.
	* modules/shadow.c: Ditto.
	* modules/stdlib.c: Ditto.
	* modules/time.c: Ditto.
	* modules/traditional.c: Ditto.
	* src/freeze.c: Ditto.
	* src/getopt.c: Ditto.
	* src/getopt1.c: Ditto.
	* src/m4.h: Ditto.
	* src/main.c: Ditto.
	* src/stackovf.c: Ditto.

	* config/gmp.m4 (M4_AC_LIB_GMP): Use AC_INCLUDES_DEFAULT:
	ac_default_headers is an autoconf internal variable.
	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Ditto.
	* config/stackovf.m4 (M4_AC_SYS_STACKOVF): Ditto.

	* configure.ac (AC_CONFIG_FILES): Add tests/atlocal.
	* tests/Makefile.am (TESTS_ENVIRONMENT): Revert the 2003-08-14
	delta.

2003-08-15  Gary V. Vaughan  <gary@gnu.org>

	* configure.ac (AC_HEADER_STDBOOL, INCLUDE_STDBOOL_H): Check for
	C99 bool.
	* system-h.in (m4_boolean): Removed in favour of using C99 bool if
	possible or faking one with a typedef.  Changed all callers.

2003-08-15  Gary V. Vaughan  <gary@gnu.org>

	Still cleaning up the users' module API, by taking out the stuff
	that isn't used by any existing modules, and moving specialised
	functions out of libm4 and into the module they are used by.

	* m4/m4module.h (m4_skip_space): No need to export this.  Moved...
	* m4/utility.c (m4_skip_space): ...to here the home of its only
	use, made static and renamed to `skip_space'.  Changed all
	callers.
	* m4/m4module.h (m4_expand_ranges): Removed prototype.
	* m4/utility.c (m4_expand_ranges): Moved definition from here...
	* modules/m4.c (m4_expand_ranges): ...to here, and exported using
	ltdl.
	* modules/m4.h (m4_expand_ranges_func): For lt_dlsym import
	casting .
	* modules/gnu.c (builtin_syntax): Import and use in this
	builtin implementation.
	* m4/m4module.h (M4_DEBUG_PRINT1, M4_DEBUG_PRINT2, M4_DEBUG_PRINT3):
	Not used.  Deleted.
	* m4/macro.c (trace_flush): Except here where the macro is now
	manually inlined.
	* m4/m4module.h (M4_DEBUG_MESSAGE, M4_DEBUG_MESSAGE1)
	(M4_DEBUG_MESSAGE2, M4_DEBUG_MESSAGE3): Only used internally, so
	moved...
	* m4/m4private.h (M4_DEBUG_MESSAGE, M4_DEBUG_MESSAGE1)
	(M4_DEBUG_MESSAGE2, M4_DEBUG_MESSAGE3): ...to here.

2003-08-14  Gary V. Vaughan  <gary@gnu.org>

	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Use the interrim new
	compiler based AC_CHECK_HEADER that was introduced in
	autoconf-2.56.
	* config/stackovf.m4 (M4_AC_SYS_STACKOVF): Ditto.
	* config/gmp.m4 (AC_LIB_GMP): Ditto. And renamed to M4_AC_LIB_GMP.
	* configure.ac: Use renamed M4_AC_LIB_GMP.

	* config/debug.m4 (M4_AC_CHECK_DEBUGGING): Don't AC_REQUIRE a
	macro that requires arguments! This stops the shell's bad
	substitution error at configure time.

	* tests/Makefile.am (TESTS_ENVIRONMENT): Now we can pass make
	variables to the testsuite shell.  Set the value of USE_GMP so
	that the gmp test will run!
	(check-local, clean-local): Use the TESTS_ENVIRONMENT variable.

2003-08-11  Gary V. Vaughan  <gary@gnu.org>

	Libltdl already has an excellent mechanism for accessing C symbols
	in modules.  Lets use that!  Remove all the exporting cruft and
	just use lt_dlsym in conjunction with a few conventions to
	simplify module writers' jobs.  Also removed the table address
	caching code and otherwise simplified the module loader quite a
	bit.  To access exported symbols in other modules, first the
	exporting module must name the symbols <modname>_LTX_<symname>,
	and the importing module must define a function type called
	<symname>_func.  The importer then adds
	M4_MODULE_IMPORT(<modname>, <symname>) at the top of any function
	that wishes to call out to the exported functions.  Care must be
	taken that <symname> is non-NULL in the importing module incase
	M4_MODULE_IMPORT fails, but otherwise it can be called as if the
	definition was in the importers source.  Study
	`modules/{gnu.c,m4.{c,h}' for a model example.  At the moment,
	m4_module_import will attempt to automatically load a module
	required for symbol access if it is not loaded already.

	* TODO: Removed the items fixed in this delta.
	* m4/ltdl.c (lt_dlhandle_find): New function to find a handle by
	module name.
	* m4/ltdl.h (lt_dlhandle_find): Declare it.
	* m4/module.c (m4_module_unload): Use it.
	* src/freeze.c (reload_frozen_state): Ditto.
	* m4/m4module.h (m4_export): Deleted.  Removed all references.
	(M4_MODULE_IMPORT): New user convenience macro for importing
	arbitrary symbols from other modules.
	* m4/module.c (m4_module_import): New function to service
	M4_MODULE_IMPORT macro.
	(module_data): Removed.  Looking up the tables on demand with
	lt_dlsym, rather than caching their addresses here simplifies the
	code substantially.
	(m4_get_module_builtin_table, m4_get_module_macro_table):
	Removed.  Changed all callers.
	(set_module_macro_table, set_module_builtin_table): Renamed to
	install_macro_table and install_builtin_table respectively, and
	simplified now that the cache is no more.
	* modules/gnu.c (builtin_symbols): Use this new mechanism to
	import m4_dump_symbols from the m4 module.
	(builtin_esyscmd): Likewise for m4_set_sysval and
	m4_sysval_flush.
	* modules/m4.c (m4_export_table): Removed.  Functions are
	addressed with the new mechanism which doesn't need this.
	(m4_set_sysval): New exported accessor function to prevent
	problems with variable access on inferior architectures.
	* modules/m4.h (m4_sysval_flush_func, m4_set_sysval_func)
	(m4_dump_symbols_func): Typedefs required by M4_MODULE_IMPORT so
	that we can have some type safety.
	* modules/modtest.c (export_test): C level exported function for
	testing the new import mechanism.
	* modules/import.c: New file for the import end of the test.
	* modules/Makefile.am (pkglibexec_LTLIBRARIES): Added import.la.
	* tests/modules.at: New test cases for intermodule symbol
	importing.

2003-08-07  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4module.c (m4_string): Moved from here...
	* m4/m4private.c (m4_string): ...to here.

	* m4/utility.c (dumpdef_cmp): Removed stale declaration.

2003-07-29  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4module.h (M4_DEFAULT_NESTING_LIMIT): This value is
	already available to module writers through
	m4_{get,set}_nesting_limit_opt(), so moved from here...
	* m4/m4.c (DEFAULT_NESTING_LIMIT): ...to here and renamed.
	(m4_create): Use it.

2003-07-28  Gary V. Vaughan  <gary@gnu.org>

	Aside from auditing path.c for m4module.h api obfuscation, this
	delta introduces the concept of private struct members in opaque
	data types to GNU m4: See the STYLE file for details.

	* TODO: Remind ourselves that a rewrite of path.c is needed.
	* m4/m4module.h (m4_search_path, struct m4_search_path_info):
	Moved from here...
	* m4/m4private.h (m4__search_path, m4__search_path_info): ...to
	here and renamed.  These type definitions are for internal api use
	only.  Changed all callers.
	* m4/m4module.h (m4_search_path_env_init, m4_search_path_add):
	Moved from here...
	* m4/path.c (search_path_env_init, search_path_add): ...to here
	and renamed.  These calls were never used outside this file.
	Changed all callers.
	(dirpath): Moved functionality of this static declaration...
	* m4/m4private.h (struct m4): ...to this new internal only
	search_path field.  Changed all callers.
	(m4__get_search_path): Added new internal api accessor.
	* m4/path.c (m4_search_path_info_new):  Removed.  Not used.
	(m4_include_init): Removed...
	* m4/m4.c (m4_create): ...because the new m4 field is now
	initialised here.
	(m4_delete): Recycle search_path memory.
	* src/main.c (main): Don't call m4_include_init now that it's
	gone!
	* doc/STYLE: Document convention for private fields in opaque
	ADTs.

2003-07-24  Gary V. Vaughan  <gary@gnu.org>

	Sometimes exporting the address of a symbol from a module isn't
	enough for other modules to call that symbol correctly.  If
	custom data types are used for function parameters, they need to
	be known to the caller.  This change introduces the concept of
	$(prefix)/include/modules/$(modulename).h to declare those
	structures.  Also we move m4_dump_symbols from libm4 to the m4
	module to show this concept in action.

	* m4/m4module.h (m4_dump_symbol_data): Moved from here...
	* modules/m4.h (m4_dump_symbol_data): ...to this new file for
	exporting data structures from modules/m4.c.
	* modules/m4.c, modules/gnu.c: Include it.
	* modules/Makefile.am (pkgmodinc_HEADERS): Install it.
	* m4/m4module.h (m4_dump_symbol_CB, m4_dump_symbols): Removed
	prototypes.
	* m4/utility.c (dumpdef_cmp, m4_dump_symbol_CB, m4_dump_symbols):
	Moved from here...
	* modules/m4.c (dumpdef_cmp_CB, dump_symbol_CB, m4_dump_symbols):
	...to here, with slight renaming.
	(m4_export_table): Prototype and add m4_dump_symbols.
	* m4/symtab.c (m4_is_symbol_value_void): Needed for an external
	definition of m4_dump_symbols.
	* m4/m4module.h (m4_is_symbol_value_void): Prototype it.
	* m4/m4private.h (m4_is_symbol_value_void): Fast macro version.

2003-07-24  Gary V. Vaughan  <gary@gnu.org>

	Create an export table in modules/m4.c in readiness for beefing up
	the module loader to track module exports and imports.

	* m4/m4module.h (m4_debug_flush_files): Removed prototype.
	* m4/debug.c (m4_debug_flush_files): Moved...
	* modules/m4.c (m4_sysval_flush): ...to here and renamed.
	* modules/gnu.c (builtin_esysval): Use it.
	* m4/m4module.h (m4_export): New type for declaring module symbols
	for export.
	* modules/m4.c (m4_export_table): List symbols exported from this
	module for use by other modules.

2003-07-24  Gary V. Vaughan  <gary@gnu.org>

	An experiment: There is loads of code in libm4 which should be in
	the m4 module, but is also used by another module. Just because
	some linkers won't cope with calls across dynamic runtime loaded
	objects I initially left the code in libm4.  It will tidy the
	module api immensely if this code moves to the right place, I just
	need to remember to invent a suitable calling mechanism at some
	point.  For now, only modules that are statically linked and
	preloaded will get this treatment, so the only platforms that will
	break are those that require all symbols to be resolved at link
	time.

	* TODO: Reminder that what I am doing could reduce portability
	unless I do something more robust later.
	* m4/m4module.h (m4_sysval): No longer exported from libm4.
	* m4/utility.c (m4_sysval): No longer declared in libm4.
	* modules/Makefile.am: Reformatting.
	* modules/m4.c (m4_sysval): Declare it at place of use.
	* modules/gnu.c (m4_sysval): Import it for use in esyscmd.

2003-07-23  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4module.h: Reformatting and rearranging lines a bit.
	(m4_obstack): Save typing by typedefing `struct obstack'.  Changed
	all users.
	(m4_call_macro, m4_expand_input): Renamed...
	(m4_macro_call, m4_macro_expand_input): ...to these.  Changed all
	callers.
	(m4_expansion_level, m4_process_macro): Moved...
	* m4/macro.c (expansion_level, process_macro): ...to here, and
	made static.

	* m4/m4module.h (program_name): Not used by modules at all, so
	moved...
	* src/main.c (program_name): ...to here.
	(print_program_name): Renamed...
	(print_program_name_CB): ...to conform to the STYLE guide.

2003-07-23  Gary V. Vaughan  <gary@gnu.org>

	More refactoring of the m4module.h API.  Replace #defines with an
	enum, and move non-public functions out of the public API.

	* m4/debug.c (stdarg.h, varargs.h): Remove variadic header
	inclusion.
	* m4/macro.c (stdarg.h): Add ANSI C variadic header.
	* m4/debug.c (m4_debug, trace): Moved...
	* m4/m4private.h (struct m4): ...to fields of this struct.
	(m4_get_debug_file, m4_get_trace_messages): New fast access macros
	for the new fields.
	* m4/debug.c (m4_debug_init, m4_debug_exit): Removed functions...
	* src/main.c (m4_debug_init, m4_debug_exit): ...invocations...
	* m4/m4.c (m4_create, m4_delete): ...and handled here instead.
	* m4/m4module.h (m4_context_field_table): Add entries for new
	debug_file and trace_messages fields.
	(M4_DEBUG_TRACE_ARGS, M4_DEBUG_TRACE_EXPANSION)
	(M4_DEBUG_TRACE_QUOTE, M4_DEBUG_TRACE_ALL, M4_DEBUG_TRACE_LINE)
	(M4_DEBUG_TRACE_FILE, M4_DEBUG_TRACE_PATH, M4_DEBUG_TRACE_CALL)
	(M4_DEBUG_TRACE_INPUT, M4_DEBUG_TRACE_CALLID)
	(M4_DEBUG_TRACE_VERBOSE): Replaced #defines with an enum.
	(m4_is_debug_bit): New macro to simplfy checks against the debug
	bits above.
	(m4_trace_format, m4_trace_header, m4_trace_flush)
	(m4_trace_prepre, m4_trace_pre, m4_trace_post): Removed
	prototypes.
	* m4/debug.c (m4_trace_format, m4_trace_header, m4_trace_flush)
	(m4_trace_prepre, m4_trace_pre, m4_trace_post): Moved...
	* m4/macro.c (trace_format, trace_header, trace_flush)
	(trace_prepre, trace_pre, trace_post): ...to these newly static
	functions, since they are only ever used from this file.  Changed
	all callers.

2003-07-17  Gary V. Vaughan  <gary@gnu.org>

	Change the macros for checking syntax so that matching against
	multiple possible syntax classes can be done with a single
	comparison some of the time.  The various classes are now bits of
	an int that can be checked with bitwise logic operators.

	* m4/m4module.h (M4_SYNTAX_IGNORE, M4_SYNTAX_OTHER)
	(M4_SYNTAX_SPACE, M4_SYNTAX_OPEN, M4_SYNTAX_CLOSE, M4_SYNTAX_COMMA)
	(M4_SYNTAX_DOLLAR, M4_SYNTAX_ACTIVE, M4_SYNTAX_ESCAPE)
	(M4_SYNTAX_ASSIGN, M4_SYNTAX_ALPHA, M4_SYNTAX_NUM)
	(M4_SYNTAX_LQUOTE, M4_SYNTAX_RQUOTE, M4_SYNTAX_BCOMM)
	(M4_SYNTAX_ECOMM): Replaced #defines with an enum.
	(M4_SYNTAX_ALNUM): Removed.  Changed all callers.
	(M4_IS_IGNORE, M4_IS_OTHER, M4_IS_SPACE, M4_IS_OPEN, M4_IS_CLOSE)
	(M4_IS_COMMA, M4_IS_DOLLAR, M4_IS_ACTIVE, M4_IS_ESCAPE)
	(M4_IS_ASSIGN, M4_IS_ALPHA, M4_IS_NUM, M4_IS_LQUOTE, M4_IS_RQUOTE)
	(M4_IS_BCOMM, M4_IS_ECOMM, M4__IS_STRING, M4_IS_IDENT): Removed.
	Replace all calls with invocations of these...
	(m4_is_syntax, m4_has_syntax): ...New macros.
	* src/freeze.c (produce_syntax_dump): Remove mask argument, which
	is no longer required with new macros.  Changed all callers.

2003-07-15  Gary V. Vaughan  <gary@gnu.org>

	* m4/input.c (CHAR_EOF, CHAR_BUILTIN, CHAR_RETRY): These token
	values are returned as part of the internal interface, so they
	need to be moved...
	* m4/private.h: ...to here.
	* m4/macro.c (expand_token): Check for out of range
	m4_peek_input() results before looking up in the syntax table.
	(collect_arguments): Ditto.

	* NEWS: Note `$' syntax class.

2003-07-08  Paul Eggert  <eggert@twinsun.com> and
	    Gary V. Vaughan  <gary@gnu.org>

	Conform to POSIX if the POSIXLY_CORRECT environment is set.
	--traditional `define' now smashes all the definitions.

	* NEWS: Explain this.
	* doc/m4.texinfo (Defn): `defn' takes any number of arguments.
	(Extensions): Explain that extensions that are incompatible with
	POSIX are disabled if POSIXLY_CORRECT is set.
	(Incompatibilities): Remove.
	(Define, Other Incompat): Explain difference
	between GNU and POSIX behavior of define, pushdef, popdef.
	* m4/m4.c (m4_get_posixly_correct_opt): New undef.
	* m4/m4module.h (m4_context_opt_bit_table): Add POSIXLY_CORRECT entry.
	* m4/m4private.h (M4_OPT_POSIXLY_CORRECT_BIT): New macro.
	(m4_get_posixly_correct_opt): New macro.
	* m4/m4macro.c (m4_process_macro): Disable $10, $abc etc. if
	POSIXLY_CORRECT.
	* modules/m4.c (builtin_functions): defn now takes any number of args.
	(builtin_define): Smash all the definitions if
	POSIXLY_CORRECT.
	(builtin_defn)): Allow any number of arguments.
	(builtin_undivert): Do not allow nonnumeric arguments
	if POSIXLY_CORRECT.
	* src/main.c (main): Set posixly-correct behavior if either
	POSIXLY_CORRECT is set, or if -G is given.
	* tests/builtins.at: New test for smashed definitions.

2003-06-27  Gary V. Vaughan  <gary@gnu.org>

	* doc/m4.texinfo (Changesyntax): Document Dollar syntax class.
	* m4/m4module.h (M4__SYNTAX_STRING): New syntax class. Be careful
	not to slow the parser down.
	(M4__IS_STRING): New macro to test string syntax class membership.
	* m4/syntax.c: Adjust docucomment.
	(m4_syntax_create): Add a default M4_SYNTAX_DOLLAR element.
	(m4_syntax_code): Translate `$' -> M4_SYNTAX_DOLLAR.
	* m4/input.c (init_builtin_token): Comment typo.
	(m4__next_token): Comment typo.
	Accept M4_SYNTAX_DOLLAR items into M4_TOKEN_STRING type tokens
	by using the new M4__IS_STRING macro.
	* m4/macro.c (m4_process_macro): Use M4_IS_DOLLAR to test for
	variable references in macro expansions.

	* doc/m4.texinfo (Eregexp and Regexp): Typo.
	(Epatsubst and Patsubst): Typo.
	(Eval): Typo.

2003-06-26  Gary V. Vaughan  <gary@gnu.org>

	Move the global variables that pertain to syntax to a new `struct
	m4_syntax_table', and then add one of these to `struct m4'.  The
	ripple effect through the code to both change formerly global
	references, and make sure a suitable context is available in
	lexical scope is disproportionately large compared to the size of
	the change proper.  This change is a large part of decoupling
	syntax.c from the rest of the code that uses it.

	* m4/m4private.h (struct m4): Add a syntax field.
	* m4/m4.c (m4_create): Initialise it,
	(m4_delete): Recycle it.
	(m4_get_symtab): Remove hand coded version...
	(m4_get_symbol_table): ...and generate this with cpp.  Changed all
	callers.
	* m4/m4module.h (m4_context_field_table): Add an extra field so we
	can generate m4_get_symbol_table.  Add a new row for
	m4_get_syntax_table.
	(M4SYNTAX): Syntactic sugar for module writers.
	(m4_symtab): Renamed to m4_symbol_table.  Changed all callers.
	(m4_syntax_table): New home for syntax related formerly global
	variables.
	* m4/m4private.h (struct m4_syntax_table): Define it.
	* m4/input.c (m4_input_init): Initialisation of these formerly
	global variables moved...
	* m4/syntax.c (m4_syntax_create): ...to here.
	* m4/input.c (m4_input_exit): And similarly, recycling of the
	memory used by those values moved...
	* m4/syntax.c (m4_syntax_delete): ...to here.
	* m4/m4module.h (DEF_LQUOTE, DEF_RQUOTE, DEF_BCOMM, DEF_ECOMM):
	Moved to m4/m4private.h.
	* m4/syntax.c (m4_get_syntax_lquote, m4_get_syntax_rquote)
	(m4_get_syntax_bcomm, m4_get_syntax_ecomm)
	(m4_is_syntax_single_quotes, m4_is_syntax_single_comments)
	(m4_is_syntax_macro_escaped): New accessors for m4_syntax_table
	objects.  Changed all callers that used to directly access the
	global equivalents.
	(m4__single_quotes, m4__single_comments, m4__use_macro_escape):
	Removed and incorporated into m4_syntax_table structure.
	* m4/utility.c (lquote, rquote, bcomm, ecomm): Ditto.
	* m4/syntax.c (m4_set_syntax): Now returns an error status,
	instead of requiring a `struct m4' to generate its own errors.
	Changed all callers.
	* src/main.c (main): Now that the syntax table is initialised as
	part of m4_create, we have to manually wipe the syntax entries if
	we are about to read a frozen file.

2003-06-26  Gary V. Vaughan  <gary@gnu.org>

	* doc/STYLE: Added notes on callback naming schemes.

	* m4/module.c (m4_set_module_macro_table)
	(m4_set_module_builtin_table): Declarations weren't changed when
	definitions were renamed on 2003-06-19.

	* m4/hash.c (m4_hash_resize): ifdefed out.  This function is
	neither used nor particularly appropriate since it exposes the
	internal workings of the hash module.  I haven't yet decided
	whether to remove it entirely.

2003-06-20  Gary V. Vaughan  <gary@gnu.org>

	Two related changes, and a huge knockon effect throughout the
	source: Moved the option variables out of global space and into
	`struct m4'; made `m4_symtab' a real datatype, so that its api
	is not marred passing `struct m4' around just so it can decide
	whether to keep traced symbol names or not.  Added setters and
	getters for the formerly global option variables, and obviously
	changed a vast number of functions to take a `struct m4' and use
	the getter funcs to find option values.

	* m4/utility.c (interactive, sync_output, debug_level)
	(no_gnu_extensions, prefix_all_builtins, suppress_warnings)
	(max_debug_argument_length, warning_status, nesting_limit)
	(discard_comments): Removed.
	* m4/m4module (warning_status, no_gnu_extensions, nesting_limit)
	(debug_level, max_debug_argument_length, prefix_all_builtins)
	(suppress_warnings, discard_comments, interactive, sync_output):
	Removed from here...
	* m4/m4private.h (struct m4): ...and equivalent fields added to
	this structure.
	(m4_get_warning_status_opt, m4_get_no_gnu_extensions_opt)
	(m4_get_nesting_limit_opt, m4_get_debug_level_opt)
	(m4_get_max_debug_arg_length_opt, m4_get_prefix_builtins_opt)
	(m4_get_suppress_warnings_opt, m4_get_discard_comments_opt)
	(m4_get_interactive_opt, m4_get_sync_output_opt): Fast access
	macros for the new fields.
	* m4/m4module.h (m4_context_field_table)
	(m4_context_opt_bit_table): Helper macros used to generate
	prototypes, setters and getters for new option fields
	consistently.
	* m4/m4.c (m4_get_warning_status_opt, m4_get_no_gnu_extensions_opt)
	(m4_get_nesting_limit_opt, m4_get_debug_level_opt)
	(m4_get_max_debug_arg_length_opt, m4_get_prefix_builtins_opt)
	(m4_get_suppress_warnings_opt, m4_get_discard_comments_opt)
	(m4_get_interactive_opt, m4_get_sync_output_opt)
	(m4_set_warning_status_opt, m4_set_no_gnu_extensions_opt)
	(m4_set_nesting_limit_opt, m4_set_debug_level_opt)
	(m4_set_max_debug_arg_length_opt, m4_set_prefix_builtins_opt)
	(m4_set_suppress_warnings_opt, m4_set_discard_comments_opt)
	(m4_set_interactive_opt, m4_set_sync_output_opt): Addressable
	setter and getter functions generated by cpp from
	m4_context_field_table and m4_context_opt_bit_table, exported as
	part of the module api.  Changed all callers.
	* m4/symtab (struct m4_symtab): Used as the concrete type for
	m4_symtab now.
	(m4_symtab_create): Allocate and initialise a new struct.
	(m4_symtab_apply): New function that works like m4_hash_apply, but
	with different callbacks specific to symbol tables.  Changed all
	callers.
	(symbol_destroy, arg_destroy, arg_copy): Renamed
	symbol_destroy_CB, arg_destroy_CB, arg_copy_CB to remind me that
	they have unused parameters for a reason!
	(dump_symbol_CB): New callback to dump the contents of a single
	symbol.
	(symtob_dump): Rewritten in terms of dump_symbol_CB.
	* m4/utility.c (m4_dump_symbol): Renamed to m4_dump_symbol_CB.
	Changed all callers.
	* m4/m4.c (m4_create): By default point the `nuke_trace_bit' field
	of the contained `m4_symtab' at the `no_gnu_extensions' field.
	Although I'm not convinced these semantics are correct, they are
	at least consistent with how things were before this delta.  Also
	set the default nesting limit to M4_DEFAULT_NESTING_LIMIT.

2003-06-19  Gary V. Vaughan  <gary@gnu.org>

	Tie down the interface to libm4 some more.  Make more structures
	opaque to modules by moving them to m4private.h, and writing
	setters and getters.  To win back the speed penalty for doing this
	also wrote macroized versions that do know about structure layout
	in m4private.h and #include that file into modules when NDEBUG is
	defined at compile time.  There are still some accessor macros in
	m4private.h that need to go, but that is not necessary to clean
	the module api up.

	* m4/m4module.h (m4_symbol_type): Moved...
	* m4/m4private.h (m4__symbol_type): ...to here.
	* m4/symtab.c (m4_get_symbol_value, m4_get_symbol_traced)
	(m4_set_symbol_traced, m4_set_symbol_name_traced)
	(m4_is_symbol_text, m4_is_symbol_func, m4_get_symbol_text)
	(m4_get_symbol_func, m4_symbol_value_create)
	(m4_symbol_value_delete, m4_set_symbol_value_text)
	(m4_set_symbol_value_func): New exported api to symbols.
	(m4_get_symbol_value_type): Replaced by m4_is_symbol_value_text
	and m4_is_symbol_value_func.
	* m4/m4module.h: Prototype these guys.
	* m4/module.c (m4_set_module_macro_table)
	(m4_set_module_builtin_table): Make these static, there is no
	reason to pollute the api with them.
	* m4/m4private.h: Reformatting.
	(m4_get_symtab): Only define when NDEBUG is defined.
	(m4_get_symbol_value, m4_get_symbol_traced)
	(m4_set_symbol_traced, m4_set_symbol_name_traced)
	(m4_is_symbol_text, m4_is_symbol_func, m4_get_symbol_text)
	(m4_get_symbol_func, m4_symbol_value_create)
	(m4_symbol_value_delete, m4_set_symbol_value_text)
	(m4_set_symbol_value_func): Macro implementations of the new
	functions when NDEBUG is defined.
	(SYMBOL_TRACED, SYMBOL_VALUE, SYMBOL_TYPE, SYMBOL_TEXT)
	(SYMBOL_FUNC, VALUE_TYPE, VALUE_TEXT, VALUE_FUNC): Removed.
	Superceded by the above.  All callers changed.
	(M4ARG): Removed.  This is no longer different to the
	m4/m4module.h definition.
	* modules/gnu.c, modules/m4.c: Only include m4private.h when
	NDEBUG is defined.  That way we exercise the same (albeit slower)
	api that external modules must use.

2003-06-18  Gary V. Vaughan  <gary@gnu.org>

	Renamed some of the types and their accessors to make more sense.
	Now we have a SYMTAB in which we store SYMBOLs, and each SYMBOL
	has a stack of SYMBOL_VALUEs.

	* m4/m4module.h (m4_token, m4_get_token_type, m4_get_token_text)
	(m4_get_token_func, m4_token_copy): Renamed to m4_symbol_value,
	m4_get_symbol_value_type,  m4_get_symbol_value_text,
	m4_get_symbol_value_func and m4_symbol_value_copy respectively.
	Changed all callers.
	(m4_symbol_type): s/M4_TOKEN_/M4_SYMBOL_/
	(m4_get_token_type): Renamed
	* m4/input.c (m4_next_token): Renamed to m4__next_token, and moved
	to the internal api.
	* m4/m4private.h: s/TOKEN_ARG_/SYMBOL_ARG_/
	s/TOKEN_/VALUE_/
	(m4__symtab_init, m4__symtab_exit): Removed prototypes.
	(m4_token_arg): Renamed to m4_symbol_arg. Changed all callers.
	(m4__token_type): Moved here from m4module.h.
	(m4__next_token): Renamed from m4_next_token.
	* m4/symtab.c: Removed some of the parameterised macro support
	functions for modularisation later.
	(m4_token_copy): Renamed to m4_symbol_value_copy, and use new
	m4_hash_dup to perform a true deep copy of the SRC.
	(arg_copy): Callback for m4_symbol_value_copy.
	* utility.c (m4_token_get_type, m4_token_text, m4_token_func):
	Renamed to m4_get_symbol_value_type, m4_get_symbol_value_text and
	m4_get_symbol_value_func.  Changed all callers.

2003-06-18  Gary V. Vaughan  <gary@gnu.org>

	Tidy up style of hash.[ch] in accordance with doc/STYLE.

	* m4/hash.c: Internal symbol renaming and formatting.
	(m4_hash_dup): New function to facilitate deep copies of hash
	tables.
	(m4_hash_apply_func): Returns a void* now, which is a richer type
	for returning exceptions (NULL means keep going).
	(m4_hash_apply): Ditto.
	* m4/hash.h: Declare exported symbols with an explicit extern.
	Reformated.

2003-06-17  Gary V. Vaughan  <gary@gnu.org>

	Still refactoring furiously.  This delta represents a change in
	semantics to symtab.c.  Instead of building temporary m4_tokens
	in the caller, and copying fields in the methods, we now create
	the actual m4_token for hashing in the caller so the methods just
	slot them in directly.  Also, this means that we don't lookup a
	symbol and get back an allocated but VOID token to copy fields
	into, we create the token we want to push and pass that to
	m4_symbol_define or m4_symbol_pushdef.  And that's it.  There are
	a few other small changes to stop knowledge of the implementation
	of symtab.c leaking out into other files.

	* m4/macro.c (expand_argument): Comment typo corrected.
	* m4/symtab.c (symtab_fetch): New function to fetch the address of
	an interned symbol.
	(m4_symbol_pushdef): Take an extra value parameter and use this
	directly as the new top of the value stack.  All callers changed
	to build a token and pass responsibility for memory in, rather
	than copying as we used to.
	(m4_symbol_define): Also use the new value parameter directly as a
	replacement for the top of the value stack.  All callers changed
	to build a token as above.
	(m4_set_symbol_traced): New function to set the traced bit on the
	named symbol, creating it if necessary.
	(symbol_popval): The guts of the old m4_symbol_popdef.
	(m4_symbol_popdef): Use it.
	* m4/builtin.c (m4_symbol_set_token): Removed,
	(m4__symbol_set_builtin, m4__symbol_set_macro): Removed and
	replaced...
	* m4/module.c (m4_set_module_builtin_table)
	(m4_set_module_macro_table): ...with these more orthogonal
	functions.
	* m4/m4module.h (m4_macro_pushdef, m4_macro_define)
	(m4_builtin_pushdef, m4_builtin_define): Removed.  No longer
	required.
	* m4/builtin.c (M4_ARG_SIGNATURE_DEFAULT_SIZE)
	(m4_arg_signature_parse): Moved...
	* m4/symtab.c: ...to here.
	* m4/input.c (m4_token_copy): Arghh... I'm amazed this didn't
	screw something up. Moved...
	* m4/symtab.c (m4_token_copy): ...to here, and fixed so that it
	actually does a proper deep copy of source to dest.

2003-06-16  Gary V. Vaughan  <gary@gnu.org>

	Further refactoring to stabilise the module API.  Renaming some
	functions for orthogonality, and judicious definition migration to
	move things out of the set of exported symbols.

	* doc/STYLE: New file.  Notes on coding style.
	* m4/m4module.c: Updated bitrotted docucomment at the top of the
	file.
	(m4_module_name, m4_module_builtins, m4_module_macros): Renamed to
	m4_get_module_name, m4_get_module_builtin_table,
	m4_get_module_macro_table which are verb phrases.  Changed all
	callers.
	* m4/builtin.c (m4_builtin_table_install, m4_macro_table_install):
	Moved to...
	* m4/module.c (m4_set_module_builtin_table)
	(m4_set_module_macro_table): ...here, and renamed. Changed all
	callers.
	* m4/m4module.c (m4_module_data): This...
	* m4/m4private.c (struct m4_module_data): ...and this...
	* m4/module.c (module_data) ...consolidated here and no longer
	exported.  Changed all callers.

2003-06-16  Gary V. Vaughan  <gary@gnu.org>

	Begin work on lifting the curse of the global variables.  To start
	with create a `struct m4' context container, and replace
	`m4__symtab' with `context->symtab' throughout.  This means
	initialising a context container in main, and adjusting many
	functions between main and the module entry points so that the
	container gets passed through.  It would have been nice to
	defer this until after 1.5, but it has a major effect on the
	user's module writing ABI, so it needs to be addressed now - at
	least in the areas that impact the ABI.  An interrelated change
	in the symtab API removes the dependency on a global symbol table,
	and instead focuses on a passed table (from the context
	container).

	* TODO: Reminders for finishing context functionality.
	* m4/Makefile.am (libm4_la_SOURCES): Add m4.c.
	* m4/m4.c: New file. Manage new struct m4 objects to eliminate
	global variables and eventually allow m4 to be reentrant.
	* m4/m4private.h (m4): Define the new structure here...
	(M4_SYMTAB, m4_get_symtab): ...so we can have fast accessors that
	don't carry the overhead of a function call.
	* m4/m4module.h: Prototype extern functions from m4/m4.c.
	(m4): Declare type for new struct m4 objects.
	(M4SYMTAB): User macro to ease finding the symbol table for the
	current context for module developers.
	(m4_symbol_token): Renamed to m4_symbol_set_token which contains a
	verb.
	(M4_BUILTIN, m4_builtin_func, M4_BUILTIN_HANDLER)
	(m4_builtin_define, m4_builtin_pushdef, m4_builtin_table_install)
	(m4_call_macro, m4_dump_symbols, m4_expand_input)
	(M4_FINISH_HANDLER, M4_INIT_HANDLE, m4_macro_define)
	(m4_macro_pushdef, m4_macro_table_install, m4_module_load)
	(m4_module_unload, m4_process_macro, m4_symbol_set_token): Add an
	m4* context parameter. Changed definitions and all callers.
	(m4_symtab): Alias for m4_hash to decouple the
	m4_symtab api from m4_hash.
	(m4_symtab_apply, m4_symtab_apply_func): Use m4_symtab instead of
	m4_hash.
	(m4_symtab_create): New function to return an initialised
	m4_symtab.
	(m4_symtab_delete): New function to delete an m4_symtab's memory.
	(m4_symbol_define, m4_symbol_delete, m4_symbol_lookup)
	(m4_symbol_popdef, m4_symbol_pushdef): Add an m4_symtab parameter
	instead of simply using the global m4__symtab.  Changed
	definitions and all callers.
	* m4/m4private.h (m4__symtab_remove_module_references): Ditto.
	* m4/symtab.c (m4__symtab_init, m4__symtab_exit): Removed.
	* src/main.c (main): Create a context and use that instead of the
	former global m4__symtab.

2003-06-13  Gary V. Vaughan  <gary@gnu.org>

	* m4/hash.c (m4_hash_apply): Pass an initial hash table parameter
	to the callback.  Callbacks should not need to hardcode the
	hashtable they are working from, nor should we have to waste the
	userdata parameter to pass the table in.
	* m4/hash.h (m4_hash_apply_func): Require the initial table
	parameter.
	* m4/symtab.c (symtab_destroy): Use the passed table instead
	of hardcoding m4__symtab.
	(m4_symbol_popdef): Don't use the userdata parameter to pass the
	table to arg_destroy.
	(arg_destroy): Use the hash parameter, ignore userdata.
	* modules/m4.c (set_trace): Make it fit the m4_hash_apply_func
	prototype.
	(traceon, traceoff): Call set_trace with the extra initial
	parameter.

2003-06-13  Gary V. Vaughan  <gary@gnu.org>

	More refactoring to stabilise the module api, this time for
	symtab.c.  Additionally, start to pay attention to function names
	that don't contain a verb like they should.

	* m4/m4module.h (m4_symtab_apply): Reintroduced this function as a
	wrapper for m4_hash_apply to decouple the symtab module from the
	hash module.
	(m4_symbol_builtin, m4_symbol_macro): Renamed to
	m4__symbol_set_builtin and m4__symbol_set_macro.  Changed all
	callers.
	(m4_symbol_delete): Create a macro version to save a function
	call.
	(m4_token_t, m4_data_t): These violate the POSIX reserved
	namespace.  Renamed to m4_token_type and m4_symbol_type. Changed
	all callers.
	(m4_token_type): Renamed to m4_token_get_type.
	(m4_symtab, m4_symtab_init, m4_symtab_remove_module_references)
	(m4_symtab_exit): Removed from the exported module
	api...
	* m4/m4private.h (m4__symtab, m4__symtab_init)
	(m4__symtab_remove_module_references, m4__symtab_exit): ...and
	renamed and added to the internal api. Changed all callers.
	(m4_symtab_apply): A faster macro version of the function for
	users of the internal api.
	* m4/symtab.c (m4_symbol_destroy, m4_arg_destroy): Renamed to
	symbol_destroy and arg_destroy.
	(symtab_debug): Added a prototype.
	(m4_symtab_apply, m4_symbol_delete): Moved to the end of the file
	so that callers in this file get the faster macro versions from
	m4/m4private.h.

2003-06-12  Gary V. Vaughan  <gary@gnu.org>

	Refactoring modules to rationalise the API into an external
	documented (eventually!) API for use by modules in the `m4_'
	namespace declared in m4/m4module.h, an internal API between the
	source files we ship (including our shipped modules) in the `m4__'
	namespace declared in m4/m4private.h and making the rest as
	cohesive as possible with liberal use of the `static' keyword.
	This change represents an audit to m4/module.c along these
	guidelines.

	* m4/m4module.h (m4_module_close_all, m4_module_find_by_builtin):
	Removed.  No longer used.
	(m4_module_close): Removed prototypes.
	(m4_module_init, m4_module_open, m4_module_unload_all): Removed
	from the exported module api...
	* m4/m4private.h (m4__module_init, m4__module_open)
	(m4__module_exit): ...and renamed and added to the internal api.
	Changed all callers.
	(BUILTIN_SYMBOL, MACRO_SYMBOL, INIT_SYMBOL, FINISH_SYMBOL):
	Centralised definitions after renaming...
	* m4/module.c (M4_BUILTIN_SYMBOL, M4_MACRO_SYMBOL, M4_INIT_SYMBOL)
	(M4_FINISH_SYMBOL): ...and removing from here.
	(m4_module_dlerror, m4_module_remove, m4_module_close)
	(m4_caller_id): Not exported at all, so renamed to module_dlerror,
	module_remove, module_close and caller_id.
	(MODULE_SELF_NAME): New macro to make reporting self errors
	easier.
	(m4_module_load, module_close, module_remove): Use it.
	* m4/m4private.h (USER_MODULE_PATH_ENV): Macro to hold "M4MODPATH"
	name.
	* src/main.c (main): Use it.

2003-06-12  Gary V. Vaughan  <gary@gnu.org>

	* README: Remove references to --enable-changeword, which has been
	removed from the code.

2003-06-11  Gary V. Vaughan  <gary@gnu.org>

	Getting rid of the annoying bug with configure --enable-debug,
	which spewed -e: command not found errors.  This was an interaction
	between libtool-1.5's LT_AC_COMPILER_OPTION, and config/debug.m4.
	You'll need to re-bootstrap the m4 tree with cvs libtool (HEAD or
	branch-1-5) to get the full fix.

	* config/debug.m4 (M4_AC_CHECK_DEBUGGING): Require libtools version
	of AC_LIBTOOL_COMPILER_OPTION (which now requires LT_AC_PROG_SED),
	and then use the probed value of $SED.
	(AC_LIBTOOL_COMPILER_OPTION): Removed. Don't conditionally define
	this, it messes up the AC_REQUIRE stack.

2003-06-10  Gary V. Vaughan  <gary@gnu.org>

	* m4/symtab.c (m4_symbol_popdef): Need to pass the hash address to
	the destroy callback.
	(m4_arg_destroy): Use the hash address to free the hash node key
	field.

2003-06-06  Gary V. Vaughan  <gary@gnu.org>

	First cut at formal parameters in macros.

	* configure.ac (AC_REPLACE_FUNCS): Add xstrzdup.
	* m4/xstrzdup.c: New file.
	* m4/builtin.c (M4_ARG_SIGNATURE_DEFAULT_SIZE): Start size for
	associative array of parameter names to details.
	(m4_symbol_token): Capture macro names with parameter lists.
	(m4_arg_signature_parse): And build an associative array to hang
	from the symbol structure to map names to details.
	* m4/hash.c (m4_hash_new): Break the m4_hash_new followed by
	m4_hash_resize idiom.  Now that we potentially add a little hash
	table to many of the entries in the symbol table, added an extra
	arg to set the initial size.  Changed all callers.
	(m4_hash_apply): New function that is basically a generalised
	version of...
	* m4/symtab.c (m4_symbol_apply): ...this.  Now deleted.  Adjusted
	all callers to call m4_hash_apply instead.
	(m4_arg_destroy): Recycle memory used by an m4_token_arg.
	(m4_symbol_popdef): Use m4_arg_destroy to help recycle the
	m4_arg_signature association that might be attached to the symbol,
	* m4/hash.h (m4_hash_apply_func): Replacement type for...
	* m4/m4module.h (m4_symtab_apply_func): ...this.  Now deleted.
	(M4_SYNTAX_ASSIGN): Placeholder for assigning default values in
	parameter lists.
	(M4_IS_ASSIGN): Detect characters with M4_SYNTAX_ASSIGN syntax.
	(M4_IS_IDENT): Detect characters that can be safely used in
	parameter names.
	* m4/syntax.c (m4_syntax_init): Add an M4_SYNTAX_ASSIGN character.
	* m4/macro.c: Corrected grammar in some comments.  Use `token'
	rather than `td' for m4_token variables.
	(m4_process_macro): If we find a dollar followed by some
	M4_IS_IDENT characters, replace that with the contents of the argv
	entry with offset stored in the m4_token_arg associated with the
	collected identifier.

2003-06-05  Gary V. Vaughan  <gary@gnu.org>

	Begin preparations for supporting formal parameters in m4 macros.

	* m4/m4private.h (struct m4_token_arg): Placeholder for holding
	the details of a formal parameter.
	(m4_token): Add an arg_signature member to hold a hash table for
	looking up formal parameters.
	* m4/input.c: Update more bitrotted comments.
	(m4_push_builtin): Initialise arg_signature member.
	(init_builtin_token): Copy arg_signature member.
	* m4/m4module.h (m4_builtin_pushdef, m4_builtin_define)
	(m4_macro_pushdef, m4_macro_define): Rewritten as macros to
	replace...
	* m4/builtin.c (m4_builtin_pushdef, m4_builtin_define)
	(m4_macro_pushdef, m4_macro_define): ...these, And...
	(m4_symbol_token): ...wrapped around this new function, which
	vastly simplifies the arguments required by the functions it
	replaces.
	Changed all callers.

2003-06-05  Gary V. Vaughan  <gary@gnu.org>

	* m4/macro.c: Format changes.

2003-06-04  Gary V. Vaughan  <gary@gnu.org>

	* m4/input.c: Updated various bitrotted comments.
	(m4_push_builtin): Just pass the whole m4_token, rather than
	extracting all the fields in the caller.  This also allows us to
	check the token type for consistency.
	(macro_funcs, macro_peek, macro_read, m4_push_macro, CHAR_MACRO):
	Renamed to builtin_funcs, builtin_peek, builtin_read,
	m4_push_builtin and CHAR_BUILTIN for consistency with the rest of
	the code.  Changed all callers.
	(struct input_block): Similarly renamed u_m member to u_b, and
	changed all callers.
	(m4_next_token): Use bzero to initialise the data fields.
	* m4/m4module (m4_push_macro): Renamed to m4_push_builtin.

2003-05-29  Gary V. Vaughan  <gary@gnu.org>

	These changes were necessary to get m4 to build on my iBook
	running "powerpc-apple-darwin6.6" using Apples build of gcc "gcc
	(GCC) 3.1 20020420 (prerelease)":

	* src/main.c: Don't include dlfcn.h, ltdl.h handles correct
	inclusion of module loader headers.
	* modules/Makefile.am: Use AM_LDFLAGS, not LDFLAGS.
	* m4/Makefile.am: Ditto.
	(libm4_la_LIBADD): Added $(LTLIBINTL).
	* m4/utility.c (program_name): Removed declaration in favour of
	the one already in error.c!
	* m4/m4module.h (program_name): Define to program_invocation_name
	when using GNU C library. Use an explicit extern declaration.
	(interactive, sync_output, debug_level, hash_table_size)
	(no_gnu_extensions, prefix_all_builtins, max_debug_argument_length)
	(suppress_warnings, warning_status, nesting_limit, discard_comments)
	(lquote, rquote, bcomm, ecomm, m4_bad_argc, m4_skip_space)
	(m4_numeric_arg, m4_shipout_int, m4_shipout_string, m4_dump_args)
	(m4_debug, m4_debug_init, m4_debug_exit, m4_debug_decode)
	(m4_debug_flush_files, m4_debug_set_output, m4_debug_message_prefix)
	(m4_trace_prepre, m4_trace_pre, m4_trace_post, m4_sysval)
	(m4_expansion_level, m4_expand_ranges, m4_expand_input)
	(m4_call_macro, m4_process_macro, m4_syntax_table, m4_current_file)
	(m4_current_line, m4_current_diversion, m4_output_current_line):
	Don't rely on default, use an explicit extern.
	* m4/error.h (error, error_at_line, error_print_progname)
	(error_message_count, error_one_per_line): Ditto.
	* m4/ltdl.c: Update from CVS libtool.
	* m4/ltdl.h: Ditto.
	* commit: Update from CVS cvs-utils.

2002-11-04  gettextize  <bug-gnu-gettext@gnu.org>

	* po/Makefile.in.in: Upgrade to gettext-0.11.5.
	* po/boldquot.sed: New file, from gettext-0.11.5.
	* po/en@boldquot.header: New file, from gettext-0.11.5.
	* po/en@quot.header: New file, from gettext-0.11.5.
	* po/insert-header.sin: New file, from gettext-0.11.5.
	* po/quot.sed: New file, from gettext-0.11.5.
	* po/remove-potcdate.sin: New file, from gettext-0.11.5.
	* po/Rules-quot: New file, from gettext-0.11.5.

2002-11-04  Akim Demaille  <akim@epita.fr>

	* doc/m4.texinfo (Esyscmd): Don't grep, use something easier:
	running m4 itself.
	* tests/others.at (iso8859): Use abs_srcdir, not srcdir.

2002-11-04  Akim Demaille  <akim@epita.fr>

	* config/Makefile.am (ACLOCAL_MACROS): Ship the Gettext macros.

2002-11-04  Akim Demaille  <akim@epita.fr>

	* configure.ac: Automake 1.7.1, Autoconf 2.54, Gettext 0.11.5,
	used as `external', and Libtool 1.4.3.
	(LINGUAS): Remove.
	(LTLIBOBJS): Don't play with it.
	* intl/: Remove.
	* Makefile.am (SUBDIRS): Remove intl.
	(ACLOCAL_AMFLAGS): Add -I config.
	(EXTRA_DIST): Add config/config.rpath.
	* po/LINGUAS: New.
	* po/Makevars: New.
	* modules/perl.c (M4INIT_HANDLER): Don't prototype xs_init.

2002-05-29  Gary V. Vaughan  <gary@gnu.org>

	Preparations for refactoring syntax tables to allow reverse
	lookups [fetch me a M4_SYNTAX_OPEN], without compromising the
	speed of normal lookups in an array of unsigned short.

	* m4/input.c (single_quotes, single_comments, use_macro_escape):
	Moved from here...
	* m4/m4private.h (m4__single_quotes, m4__single_comments,
	m4__use_macro_escape): ...to here, and renamed.  The `m4__' prefix
	is for internal symbols which unavoidably pollute the global
	namespace, but are not published APIs.
	Adjusted all callers.
	* m4/input.c (m4_syntax_init, m4_syntax_code, m4_set_quotes,
	m4_set_comment, m4_set_syntax, set_syntax_internal,
	unset_syntax_attribute): Moved from this file...
	* m4/syntax.c: New. ...to this file.
	Also added an m4_syntax_exit stub for orthogonality.
	* src/main.c (main): Use it.
	* m4/Makefile.am (libm4_la_SOURCES): Add syntax.c.
	* m4/m4module.h: Reformatting.  New prototypes.

2002-05-29  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap (aclocal_apiversion): The aclocal apiversion is
	distinct from the automake release number (in that the apiversion
	apparently has no micro-version-component).
	(aclocal_apilibdir): Use it.

2002-05-28  Gary V. Vaughan  <gary@gnu.org>

	* m4/hash.c (m4_hash_resize): New function.
	* m4/hash.h: Add prototype.
	* m4/symtab.c (m4_symtab_init):  Use it.  This could do with some
	benchmarking to find a good value for, say, autoconf.  This is
	already a little quicker than before for me.

	* m4/symtab.c (m4_symtab_hash, m4_symtab_cmp): Moved from here...
	* m4/hash.c (m4_hash_string_hash, m4_hash_string_cmp): .. to here,
	and reenamed.
	* m4/hash.h: Adjust prototypes.

2002-01-22  Akim Demaille  <akim@epita.fr>

	* bootstrap (aclocal_apilibdir): New, to cope with Automake's new
	APIVERSION scheme.
	* tests/Makefile.am (package.m4): New.
	* tests/atlocal.in: Adjust to CVS Autotest.
	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Use AC_LIBOBJ.
	* configure.ac: LIBOBJ is a forbidden string.
	Simplify AM_INIT_AUTOMAKE invocation.
	* config/Makefile.am (ACLOCAL_MACROS): Add amversion.m4 and
	options.m4.

2002-01-21  gettextize  <bug-gnu-utils@gnu.org>

	* po/Makefile.in.in: Upgrade to gettext-0.10.40.

2001-10-19  Akim Demaille  <akim@epita.fr>

	* m4/module.c, m4/output.c, src/main.c: Normalize error messages.

2001-10-19  Akim Demaille  <akim@epita.fr>

	* m4/input.c (m4_next_token): Display where was opened what is
	not closed.

2001-10-19  Akim Demaille  <akim@epita.fr>

	* m4/macro.c (expand_argument): Display where was opened what is
	not closed.

2001-10-18  Akim Demaille  <akim@epita.fr>

	* m4/input.c, modules/m4.c: Formatting changes.

2001-10-17  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap: s/configure.in/configure.ac/

2001-10-16  Gary V. Vaughan  <gary@gnu.org>

	* m4/symtab.c (m4_symbol_destroy): This function calls
	m4_symbol_popdef, which recycles a symbols memory when the last
	definition is popped.  Since we were passing the address of the
	symbol name found in the symbol table, and it was being removed
	partway through m4_symbol_destroy() we were referencing freed
	memory for the balance of the function.  Now we take a copy of the
	symbol name tring and use that as a key into the symbol
	table... that way if the original symbol name is freed, the copy
	is still valid.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* m4/ltdl.c: Update.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* src/main.c, src/freeze.c, m4/debug.c, m4/input.c, m4/macro.c:
	Don't gettextize internal error messages.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* tests/macros.at (Arity and defn): New failing test.
	(Arity, defn, and freeze): New.

	Fix `Arity and defn'.

	* m4/input.c (m4_push_macro): Don't forget the arity.
	* modules/m4.c (defn): Likewise.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* tests/builtins.at (pushdef/popdef, trace, trace2, trace3): Move
	to...
	* tests/macros.at (pushdef/popdef, Tracing Hanoi Towers)
	(Propagation of traceon, Propagation of --trace): this new file.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* m4/utility.c (m4_numeric_arg): Use the usual (argc, argv, ...)
	interface instead of (name, argc...).
	Upon failure, specify which argument was guilty.
	Adjust callers.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* modules/evalparse.c: Save translators' time: don't translate
	internal error messages.
	(m4_evaluate): Simplify/normalize error messages.
	* doc/m4.texinfo (Eval): Adjust.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* m4/macro.c (expand_macro): Let m4_bad_argc handle the cases
	where no checking is needed.
	* m4/utility.c (m4_bad_argc): Use the usual (argc, argv, ...)
	interface instead of (name, argc...).
	Adjust callers.
	* modules/gnu.c (m4_patsubst_do): Don't check argc, done
	elsewhere.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* m4/utility.c (m4_bad_argc): Display user argument counts, i.e.,
	exclude the builtin name from the count.
	* modules/m4.c (ifelse): Do not use the regular argc mechanism, as
	calling ifelse with a single argument is valid.
	* doc/m4.texinfo (Ifelse): Add an example where ifelse is invoked
	with 1 and 2 args, mostly to strengthen the test suite.

2001-10-13  Akim Demaille  <akim@epita.fr>

	* m4/output.c (m4_make_diversion, m4_insert_file)
	(m4_insert_diversion, +m4_freeze_diversions): Ansify.

2001-10-12  Gary V. Vaughan  <gary@gnu.org>

	* m4/input.c (init_builtin_token):  Renamed from init_macro_token,
	since we call these things builtins in the rest of the code!

	* modules/gnu.c (m4_regexp_compile): s/%0/%s/

2001-10-12  Gary V. Vaughan  <gary@gnu.org>

	Rather than forcing each builtin definition to manage its own
	argument range checking, tabulate the maxima and minima for all
	builtins in each module.  This forces us to consider what the
	valid ranges for each builtin should be, and moves the checking
	code out of each builtin implementation and into the builtin
	caller infrastructure.

	* m4/m4module.h (struct m4_builtin): Add argument minima and
	maxima.
	* m4/m4private.h (struct m4_token): Reflect them here too.
	* m4/input.c (struct input_block): ...and here.
	(m4_token_copy): New function for token copying.
	(init_macro_token): Copy them from a token to the input stack.
	(m4_next_token): Don't forget to initialise them for text
	macros.
	* m4/macro.c (expand_argument): Use m4_token_copy, and also
	check argument counts before calling the builtin handler.
	* m4/symtab.c (m4_symbol_builtin): Take minima and maxima params.
	(m4_symbol_macro): Likewise.
	* m4/builtin.c (m4_builtin_pushdef): Add min_args and max_args
	parameters.  Updated all callers.
	(m4_builtin_define): Ditto.
	(m4_macro_pushdef, m4_macro_define): Ditto.
	* m4/symtab.c (m4_symbol_builtin, m4_symbol_define): Ditto.
	* modules/evalparse.c:  Declare argument counts for defined
	builtins and remove explicit calls to m4_bad_argc().
	* modules/gnu.c: Ditto.
	* modules/load.c: Ditto.
	* modules/m4.c: Ditto.
	* modules/modtest.c: Ditto.
	* modules/mpeval.c: Ditto.
	* modules/perl.c: Ditto.
	* modules/shadow.c: Ditto.
	* modules/stdlib.c: Ditto.
	* modules/time.c: Ditto.
	* TODO: Updated.

2001-10-10  Gary V. Vaughan  <gary@gnu.org>

	The trace semantics now attach the trace bit to a symbol name.
	For as long as a traceon(`foo') is active, calls to foo will be
	traced regardless of intervening undefines or module unloads.
	Fixed the flag propogation issues differently to the fixes
	reverted with the last attempt at nailing down trace:

	* m4/m4private.h:  This file is not visible outside of the m4
	source tree, so I removed all the `M4_' and `m4_' prefixes to save
	on typing.  Updated all clients.
	(m4_token): New typedef contains the fields that need to be passed
	around with the low level tokeniser.
	(m4_token_data):  Removed.
	(m4_symbol): Now contains the traced flag again.
	* m4/symtab.c:  Rewritten again.  Now we don't remove symbols with
	the trace bit set.  This change is contained entirely within this
	module and doesn't leak out into the callers.  Updated all
	clients.
	(m4_symbol_builtin, m4_symbol_macro):  Adjusted to make use of the
	new fields in m4_token.  Updated all clients.
	* m4/builtin.c (m4_builtin_pushdef):  Needs a flags argument so
	that `groks_macro_args' and `blind_if_no_args' flags are retained
	when defn() results are passed around in m4 code.  Updated all
	callers.
	(m4_builtin_define): Ditto.
	(m4_macro_pushdef, m4_macro_define): Ditto.
	* m4/input.c (struct input_block): Add a flags field to facilitate
	the above.
	(m4_push_macro):  ...use it.
	(init_macro_token):  Retrieve it.
	(m4_next_token): Initialise it.
	* m4/macro.c (expand_argument):  Copy it.
	* m4/m4module.h: Adjust.
	* tests/builtins.at:  Adjust the expected output of the trace
	tests to reflect the change in semantics.
	* tests/modules.at (modules: trace):  Check that unloading a
	module which supplies a traced symbol definition doesn't lose te
	trace bit.

2001-10-07  Gary V. Vaughan  <gary@gnu.org>

	* modules/gnu.c (m4_macro_table): Display the timetamp when
	expanding __m4_version__.

	* configure.ac (--with-modules): Forgot a comma in the
	AC_HELP_STRING parameter list.

2001-10-05  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap: Remove aclocal.m4t when it is no longer required.

2001-10-05  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am: Adjust for gnuprog2.
	* tests/m4.in: There can be a leading path.
	* tests/modules.at (AT_CHECK_M4_MODTEST): No need for $4 and $5.
	* tests/testsuite.at: Adjust to the most recent Autotest.
	(AT_CHECK_M4_FILTER): Fix and rename as...
	(AT_TEST_M4): this.
	* tests/others.at: Use it.

	* config/gmp.m4 (_AC_LIB_GMP): In order to read the content of a
	variable in shell scripts, one uses `$'...

2001-10-04  Gary V. Vaughan  <gary@gnu.org>

	* configure.ac: `rm -f $m4_getopt_h' was lost.

2001-10-04  Gary V. Vaughan  <gary@gnu.org>

	* configure.ac (TIMESTAMP): Display with AS_BOX at configure
	time.  Define it for config.h in order to...
	* src/main.c (main): ...display the timestamp for --version.

2001-10-04  Akim Demaille  <akim@epita.fr>

	* modules/gnu.c (m4_regexp_do, m4_patsubst_do): Extracted from
	previous builtins `regexp' and `patsubst'.
	(regexp, patsubst): Use them.
	(eregexp, epatsubst): New builtins.
	* doc/m4.texinfo (Patsubst, Regexp): Rename and complete as...
	(Epatsubst and Patsubst, Eregexp and Regexp): these.
	(Extensions): More info on REs.

2001-10-04  Akim Demaille  <akim@epita.fr>

	* modules/modtest.c (init_handler): Consistently output to stderr.
	(finish_handler): New.
	(test): The `if' is an `assert'.
	* tests/modules.at: Adjust.

2001-10-04  Akim Demaille  <akim@epita.fr>

	* m4/utility.c (m4_bad_argc): Detail the mismatches.

2001-10-01  Akim Demaille  <akim@epita.fr>

	* tests/generate.awk: Tag the tests with `documentation'.
	* tests/modules.at (AT_CHECK_M4_MODTEST): New.
	Use the make the existing modtest tests more uniform, and complete
	the set of possibilities.

2001-10-01  Akim Demaille  <akim@epita.fr>

	* config/gmp.m4: Consult the user before using GMP: use
	--without-gmp.
	* configure.ac: Adjust.
	* modules/gmp.c: No protection needed as the module is not built
	if GMP is not used.

2001-10-01  Akim Demaille  <akim@epita.fr>

	* tests/generate.awk: Remove debugging code.
	(fatal): Specify the current location.

	* m4/debug.c, m4/macro.c, m4/utility.c, modules/format.c,
	* modules/gnu.c, modules/m4.c: Use M4ARG.

2001-10-01  Akim Demaille  <akim@epita.fr>

	* modules/gnu.c (RE_SYNTAX_BRE, RE_SYNTAX_ERE): New.
	(m4_regexp_compile): New.
	(regexp, patsubst): Use it.

2001-09-30  Gary V. Vaughan  <gary@gnu.org>

	Reinstate the memory handling improvements from the patch I just
	reverted.  Relevant ChangeLog entries repeated here:

	* m4/module.c (m4_module_remove): New function that holds the core
	of the old m4_module_unload.
	(m4_module_unload): Use it.
	(m4_module_unload_all): When we know the modules will never be
	used again (i.e. on exit), free up as much module memory as
	possible.  There are still some artifacts from resident modules
	living inside ltdl.c, but everything else is freed.
	* m4/debug.c (m4_debug_exit): Free memory allocated in
	m4_debug_init().
	* m4/input.c (m4_input_exit): Ditto wrt m4_input_init().
	* m4/output.c (m4_output_exit): Ditto wrt m4_output_init ().
	* src/stackovf.c (stackovf_exit): Ditto wrt setup_stackovf_trap ().
	* m4/m4module.h: Updated prototypes.
	* m4/hash.c (m4_hash_exit): Free the nodes on the free list.
	* m4/hash.h: Updated prototypes.
	* src/main.c (main): Use all these new functions to clean up as
	much memory as possible before exit.

2001-09-30  Gary V. Vaughan  <gary@gnu.org>

	Reverted my large patch for removing the old m4_symbol
	structure on 2001-09-20.  We are still not happy about the way
	trace works in conjunction with defn and undefine, and leaving
	the reverted patch active prevents us from moving the traced
	bit from the definition back to the symbol.

2001-09-30  Gary V. Vaughan  <gary@gnu.org>

	* configure.in: Moved to...
	* configure.ac: ...here.  Added a libtool like timestamped
	banner, and tidied up the libltdl cruft.
	* config/mkstamp: Script to extract a timestamp from ChangeLog.
	* modules/Makefile.am (INCLTDL):  Removed.  This is required
	only when libltdl is configured in a subdirectory.
	* src/Makefile.am: Ditto.
	(LIBADD_DL):  No need to add this again, libtool already knows
	that libm4.la depends on it.
	* m4/Makefile.am: Automake sets variables from AC_SUBST.  Use
	them.

	* TODO: stackovf.c is basically broken.
	Reported by Marc Espie <espie@schutzenberger.liafa.jussieu.fr>

2001-09-28  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am (EXTRA_DIST): `m4' is not to be shipped.

2001-09-27  Akim Demaille  <akim@epita.fr>

	* tests/m4.in: Don't use short options.
	Simplify the stderr signature normalization.

2001-09-27  Akim Demaille  <akim@epita.fr>

	tests/m4 shall be position independent.

	* tests/m4.in: New.
	* tests/m4: Remove.
	* tests/testsuite.at: No args to AT_INIT.
	* configure.in, tests/Makefile.am: Adjust.

2001-09-22  Akim Demaille  <akim@epita.fr>

	Autotest has changed again.

	* tests/Makefile.am (DISTCLEANFILES): Add package.m4.
	(package.m4): Remove.
	* configure.in: Adjust to LIBADD_GMP.

2001-09-21  Gary V. Vaughan  <gary@gnu.org>

	* config/gmp.m4 (AC_ARG_WITH): Removed.
	(GMP_LIB): Renamed to LIBADD_GMP for consistency.
	(AC_LIB_GMP): When performing a test compile against libgmp,
	include the header gmp.h if possible, and link against -lgmp.  If
	they both work define USE_GMP.
	* modules/Makefile.am (mpeval_la_LIBADD): Add LIBADD_GMP.
	(mpeval_LTX_init_func): Complain on load that there was no libgmp
	at compile time.

2001-09-20  Gary V. Vaughan  <gary@gnu.org>

	* m4/evalparse.c: Moved to...
	* modules/evalparse.c:  ...here.  This code is shared between
	modules/mpeval.c and modules/m4.c, so there is no need to pollute
	the libm4 API with its details.  Moderately rewritten to interface
	into its clients more simply.
	* m4/eval.c: Deleted.  Migrated functionality to...
	* modules/m4.c: ...here.
	(builtin_eval):  Implemented in terms of the new interface style.
	* modules/mpeval.c (builtin_mpeval): Ditto.
	* m4/m4module.h: Removed references to the former m4/eval.c.
	* m4/Makefile.am (libm4_la_SOURCES):  Removed eval.c.
	(EXTRA_libm4_la_SOURCES): Deleted.
	* modules/Makefile.am (EXTRA_m4_la_SOURCES): Reference evalparse.c.
	(EXTRA_mpeval_la_SOURCES): Reference evalparse.c.

2001-09-20  Akim Demaille  <akim@epita.fr>

	* config/gmp.m4 (AM_WITH_GMP): Rename as...
	(AC_LIB_GMP): this.
	By default, use gmp.
	Massive revamping.
	* configure.in: Adjust.
	Use Automake conditionals for USE_GMP.
	Always compute sizeof (long long int).
	This was a bug BTW, as `eval' (not `mpeval') depends on it:
	before, it was used _only_ if mpeval was not activated.
	* modules/Makefile.am (pkglibexec2dir, +pkglibexec2_LTLIBRARIES)
	(mpeval_la_LIBADD): New macros.
	* modules/mpeval.c: No longer be conditioned by WITH_GMP.
	Indent.
	* tests/Makefile.am ($(srcdir)/$(TESTSUITE)): Create package.m4.
	* tests/atlocal.in, tests/builtins.at: Depend upon USE_GMP, not
	WITH_GMP.

2001-09-20  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am (package.m4): New.
	* tests/testsuite.at: Adjust AT_INIT and AT_VICTIMS.

2001-09-20  Gary V. Vaughan  <gary@gnu.org>

	More cleanup.  After the last patch, m4_symbol holds nothing but
	the head of a chain of m4_token_data.  So I have removed the old
	m4_symbol, so that m4_token_data chains are stored directly in the
	value cell of a hash table node.  But there's more... m4_symbol
	was a more natural name for the symbol value cell, and now that it
	is gone I have renamed the former m4_token_data structure to
	m4_symbol.  This change turned out to be a pig to get right, since
	the original code didn't need to modify the value cell itself,
	since changing the chain happened inside the m4_symbol that used
	to be returned -- I had to pass the address of the value cell
	across various function calls, incase the head value changed.  I
	also tightened up the memory management to help me find a nasty
	memory corruption bug that took me all night to track down...

	* m4/m4private.h (struct m4_symbol): Removed.
	(struct m4_token_data): Renamed to `struct m4_symbol'.  Updated
	all references.
	* m4/hash.c (m4_hash_iterator_value): Return the address of the
	value cell.  Updated all callers.
	* m4/symtab.c: Took advantage of the simplification in the data
	structures to rewrite a lot of this file more simply.  There is
	still some room for optimisation here, but we should tackle that
	systematically closer to the release.

	* m4/ltdl.c: Added dmalloc support, and fixed some memory leaks it
	revealed.  This version is ahead of CVS libtool until I get chance
	to flush my changes.
	* m4/module.c (m4_module_remove): New function that holds the core
	of the old m4_module_unload.
	(m4_module_unload): Use it.
	(m4_module_unload_all): When we know the modules will never be
	used again (i.e. on exit), free up as much module memory as
	possible.  There are still some artifacts from resident modules
	living inside ltdl.c, but everything else is freed.
	* m4/debug.c (m4_debug_exit): Free memory allocated in
	m4_debug_init().
	* m4/input.c (m4_input_exit): Ditto wrt m4_input_init().
	* m4/output.c (m4_output_exit): Ditto wrt m4_output_init ().
	* src/stackovf.c (stackovf_exit): Ditto wrt setup_stackovf_trap ().
	* m4/m4module.h: Updated prototypes.
	* m4/hash.c (m4_hash_exit): Free the nodes on the free list.
	* m4/hash.h: Updated prototypes.
	* src/main.c (main): Use all these new functions to clean up as
	much memory as possible before exit.

2001-09-18  Gary V. Vaughan  <gary@gnu.org>

	The `traced' flag needs to be attached to the definition of a
	symbol rather than the current symbol containing the definition.
	Implementing this showed up some long standing post 1.4 bugs in
	flag propogation which I also fixed.

	* m4/m4private.h (struct m4_symbol): Remove the traced flag.
	(struct m4_token_data): And add it back in here.
	* m4/input.c (init_macro_token): Propogate the traced flag
	correctly.
	* m4/macro.c (expand_argument): Ditto.
	* tests/builtins.at (trace2, trace3): New tests based on Akim's
	sadistic email ;-)

2001-09-08  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4private.h (struct m4_token_data): Simplified by removing
	the redundant `traced' flag, and one level of structure nesting.
	(M4_TOKEN_DATA_FUNC_TRACED): Removed.
	* m4/input.c (init_macro_token): No need to initialise removed
	`traced' field.
	* m4/macro.c (expand_argument): No need to copy it either.
	* m4/utility.c (m4_token_data_func_traced): Or provide an access
	function.

	* m4/hash.c (m4_hash_bucket_insert): Symbol shadowing is no longer
	dependant on multiple symbols with the same key, so preserving
	relative symbol order in each bucket during resizing is no longer
	required.  The resize function is considerably faster as a result.

	* m4/m4module.h, m4/builtin.c, m4/symtab.c:
	s/m4_symbol_insert/m4_symbol_define/g;
	s/m4_builtin_insert/m4_builtin_define/g;
	s/m4_macro_insert/m4_macro_define/g.  Updated all callers.

2001-09-08  Gary V. Vaughan  <gary@gnu.org>

	Get rid of m4_symbol_lookup_t entirely.  With Akim's earlier
	commits, the m4_lookup_symbol dispatch function is split into
	specialised functions that must be called directly.

	* m4/m4module.h (m4_symbol_lookup_t): Removed.
	* m4/symtab.c (m4_lookup_symbol): Removed.
	(m4_symbol_builtin, m4_symbol_macro): New functions.
	* m4/builtin.c (m4_builtin_define): Split into...
	(m4_builtin_pushdef, m4_builtin_insert): ...these.
	(m4_macro_define): Split into...
	(m4_macro_pushdef, m4_macro_insert): ...these.
	* src/main.c (main): Set command line macros from `-D' parameters
	using `m4_macro_define'.

2001-09-08  Gary V. Vaughan  <gary@gnu.org>

	* m4/symtab.c (m4_symtab_remove_module_references):  Renamed as
	this from m4_remove_table_reference_symbols().
	* m4/m4module.h, m4/module.c: Updated all references.

2001-09-07  Akim Demaille  <akim@epita.fr>

	* modules/stdlib.c, modules/times.c: Misc cleanups.

2001-09-07  Akim Demaille  <akim@epita.fr>

	* configure.in: We now need Autoconf 2.52e.
	* m4/m4module.h (m4_symbol_lookup_t): Remove `M4_SYMBOL_POPDEF'
	and `M4_SYMBOL_DELETE'.
	* m4/symtab.c (m4_lookup_symbol, symtab_debug): Adjust.
	* src/main.c (main): Adjust.

2001-09-06  Gary V. Vaughan  <gary@gnu.org>

	Fix the obstack.h problem once and for all!  At configure time we
	can test for a system supplied obstack.h:  depending on the
	result, we now generate system.h with an #include of the correct
	header.  As a bonus, I've also added a --with-included-obstack,
	incase the user doesn't like the system obstack for some
	reason... and also we can test the shipped obstack on a system
	that has oe of its own.  We also now need to be careful to add
	build directories to the include search path, since the generated
	system.h will be in the build tree.

	* configure.in (AC_CONFIG_FILES): Generate system.h from
	system-h.in.
	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Determine whether to
	include the system obstack header or the copy shipped with M4.
	Allow the user to override configure and force the build to use
	the shipped version.
	* m4/system-h.in: New file, template for...
	* m4/system.h: ...this.  Now deleted.
	* m4/m4module.h: Include system.h before everything else.
	* src/freeze.c: Ditto.
	* m4/Makefile.am (dist-hook): Remove generated system.h.
	(INCLUDES): Check builddir for generated headers before checking
	srcdir.
	* modules/Makefile.am (INCLUDES): Ditto.
	* src/Makefile.am (INCLUDES): Ditto.

2001-09-05  Gary V. Vaughan  <gary@gnu.org>

	* TODO: Remove the items that have been addressed already.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* src/main.c (main): Standardize --version.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* modules/format.c (format): Have a bigger `str'.

2001-09-05  Akim Demaille  <akim@epita.fr>

	Rationalize warnings, reporting the macro name as if it were a
	program name, and assertions.

	* m4/m4module.h (m4_lookup_symbol): Prototype, it is still used.
	(M4WARN): New.
	* m4/symtab.c (m4_lookup_symbol, m4_symbol_popdef)
	(m4_symbol_delete):
	Use assert for internal errors.
	* m4/utility.c (m4_bad_argc, m4_numeric_arg, m4_dump_symbols): Use
	M4WARN.
	* modules/m4.c (undefine, defn, traceon, traceoff, dumpdef): use
	M4WARN and assert.
	* tests/builtins.at (pushpop): Adjust.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* m4/symtab.c (m4_symbol_insert): Don't use `foo () || bar ()'
	with pointers.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* m4/m4module.h (m4_symbol_lookup): Remove M4_SYMBOL_LOOKUP.
	* m4/macro.c, m4/symtab.c: Adjust.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* m4/symtab.c (m4_symbol_popdef, m4_symbol_delete): Rename as...
	(m4_symbol_pop, m4_symbol_del): this.
	(m4_symbol_lookup, m4_symbol_pushdef, m4_symbol_insert)
	(m4_symbol_popdef, m4_symbol_delete): New.
	(m4_lookup_symbol): Adjust.
	* m4/m4module.h, src/main.c, modules/gnu.c, modules/m4.c: Adjust.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* m4/m4module.h (m4_symbol_lookup): Rename as...
	(m4_symbol_lookup_t): this.

2001-09-05  Akim Demaille  <akim@epita.fr>

	* m4/m4module.h (m4_symbol_lookup): Remove M4_SYMBOL_IGNORE,
	unused.
	* m4/symtab.c (m4_lookup_symbol): Adjust.

2001-09-03  Gary V. Vaughan  <gary@gnu.org>

	Bootstrap will now work with Libtool 1.4.1 or higher:
	* bootstrap: Remove stale autom4te.cache files when
	rebootstrapping.
	* config/Makefile.am (ACLOCAL_MACROS):  Add ltdl.m4 and
	libtool.m4.
	* bootstrap: Ignore acinclude.m4 now the we include ltdl.m4 and
	libtool.m4 directly.
	Run libtoolize to refresh ltmain.sh.
	* config/ltmain.sh:  Deleted.
	* acinclude.m4: Deleted.
	* m4/ltdl.c, m4/ltdl.h: Updated from libtool-1.4.1.

	* config/debug.m4 (AC_LIBTOOL_COMPILER_OPTION): Provide a fallback
	implementation for the cvs impaired libtool user.

2001-09-03  Akim Demaille  <akim@epita.fr>

	* m4/symtab.c (m4_lookup_symbol): Give more details when reporting
	internal errors.
	Avoid using `default' in switch, as it hides useful compiler
	warnings when a case is forgotten.

2001-09-03  Akim Demaille  <akim@epita.fr>

	* src/main.c (MODULE_SHORTOPT, MODULEPATH_SHORTOPT): Remove, there
	is no such thing as `WITH_MODULES'.

2001-09-03  Akim Demaille  <akim@epita.fr>

	Improve the test suite's selfcontainedness.

	* doc/m4.texinfo: Let `input.m4' be the input file, not `in'.
	(Include, Undivert): Tag the other input files.
	* tests/generate.awk: Catch `@comment file:'.
	`-I $src' is no longer needed.
	`next' is really like `return': the rest is skipped.
	Adjust to `input.m4'.
	(fatal): New function.
	* tests/foo, tests/incl.m4: Remove.

2001-09-01  Gary V. Vaughan  <gary@gnu.org>

	The shadowing mechanism and, infact, the whole symbol table
	implementation was creaking under the weight of the features piled
	on top of it.  We now have a separate hash table module which will
	dynamically resize to keep symbol density withing good performace
	limits, and a new symtab module layered above it.  Symbol lookups
	are now marginally more efficient (since the shadowed flag is no
	longer required) and symbol removal, such as on module unload, is
	considerably faster due to a reorganisation of the data structures
	used in symtab.c.

	* src/main.c (main):  Don't mention `-H'.
	* doc/m4.texinfo (Invoking m4): Document that -H no longer has any
	effect.
	* NEWS: Updated.
	* m4/hash.c: New generalised dynamic hash table data structure
	management module.
	* m4/hash.h: Public interface.
	* m4/Makefile.am (pkginc_HEADERS): Add hash.h.
	(libm4_la_SOURCES): Add hash.c.
	* m4/symtab.c: More or less rewritten from scratch, within the
	bounds of the previous API.
	(m4_symtab_apply): A cleaner version of the old hack_all_symbols
	call.  Updated all callers.
	* m4/m4module.c: #include <m4/hash.h>, and changed all affected
	declarations to reflect API changes.
	(M4INIT): Generate a declaration too, to avoid the warning with
	--enable-debug builds.
	(M4FINISH): Ditto.
	(HASHMAX): Removed.
	* m4/utility.c (hash_table_size):  Removed.
	(m4_dump_symbols): Rewritten to build and qsort an array of symbol
	names, which are then looked up by builtin_dumpdef() as necessary.
	This implies a small speedup in builtin_symbols(), which discarded
	all of the symbol info under the old call.
	* m4/m4private.h (m4_symbol): Removed shadowed flag -- symbol
	shadowing is implicit in respect to the new data structures.
	symbol names are no longer duplicated here, they are stored in the
	key field of the hash table.
	Moved macro_args and blind_no_args...
	(m4_token_data): ...to here.
	m4/macro.c (expand_macro):  Added a name argument since the symbol
	name is no longer copied into each struct m4_symbol.  Modified all
	callers.
	(collect_arguments):  Ditto.
	* modules/m4.c (set_trace): Ditto.
	* modules/gnu.c (builtin_symbols): Updated.
	* src/freeze.c (produce_symbol_dump): Much improved in light of
	the improved symbol table layout.

2001-09-01  Gary V. Vaughan  <gary@gnu.org>

	* m4/m4private.h (SYMBOL_NEXT): Move into m4's name space; renamed
	to M4_SYMBOL_NEXT.
	(SYMBOL_TRACED): Similarly renamed by prefixing with `M4_'.
	(SYMBOL_SHADOWED, SYMBOL_MACRO_ARGS, SYMBOL_BLIND_NO_ARGS,
	SYMBOL_NAME, SYMBOL_TYPE, SYMBOL_TEXT, SYMBOL_FUNC,
	SYMBOL_HANDLE): Ditto.
	* m4/builtin.c, m4/macro.c, m4/symtab.c, m4/utility.c,
	modules/gnu.c, modules/m4.c, src/freeze.c,
	src/main.c:  Updated all references.

	* src/Makefile.am (m4_SOURCES): Don't list $(M4OBJS) here, since
	Automake 1.5 chokes on dynamic source file lists,  Besides, it is
	already listed in m4_LDADD... how did that ever used to work?
	* configure.in (getopt.h): Use AC_CONFIG_LINKS instead of a manual
	link.
	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Ditto.
	Suggested by Tim Van Holder <tim.van.holder@pandora.be>

	* tests/m4: Don't call the m4 wrapper script with libtool, it
	works fine all by itself.

2001-08-30  Gary V. Vaughan  <gary@gnu.org>

	The experimental `changeword' feature never took off, and has
	no obvious advantages over `changesyntax' to compensate the
	enormous speed penalty it carries:
	* configure.in (ENABLE_CHANGEWORD): Removed.
	* m4/m4module.h (m4_set_word_regexp): Removed.
	* m4/m4private.h (m4_token_data): Removed original_text field.
	* m4/utility.c (m4_token_data_orig_text): Removed.
	* m4/input,c: Removed all conditional ENABLE_CHANGEWORD code.
	* m4/macro.c: Ditto.
	* src/main.c: Ditto.
	* modules/Makefile.am (changeword.la): Removed.
	* modules/changeword.c: File removed.
	* doc/m4.texinfo: References to changeword and --word-regexp
	removed.
	* po/POTFILES.in: modules/changeword.c removed.
	* tests/atlocal.in (ENABLE_CHANGEWORD): Removed.
	* tests/builtins.at (changeword): Test removed.

2001-08-30  Akim Demaille  <akim@epita.fr>

	* bootstrap.sh: Create aclocal.m4 instead of modifying it.
	This also help having a single list of m4 files: in
	config/Makefile.am.
	* config/Makefile.am (STANDARD_MACROS): Rename as...
	(ACLOCAL_MACROS): this.
	(list-standard-macros): Remove.
	(spy): New.

2001-08-29  Gary V. Vaughan  <gary@gnu.org>

	In an attempt to moderate my egomania...
	* tests/modules.at: Remove attributions.

	* tests/generate.awk: When making substitutions to "@&t@", either
	"&" or "\&" in the substitution string argument to gsub refer back
	to the matched text.  "@\\&t@" seems to work though, Tests 43 and
	67 now pass for me.

2001-08-29  Akim Demaille  <akim@epita.fr>

	* tests/others.at (changeword, ddivert, debug, esyscmd, exp, gmp)
	(include, indir, multiquotes, patsubst, pushdef/popdef, regexp)
	(sync-lines, trace, translit, undivert, wrap): Move to...
	* tests/builtins.at: this new file.
	* tests/others.at (Discard comments, import-environment): Move to...
	* tests/options.at: this new file.

2001-08-29  Akim Demaille  <akim@epita.fr>

	* tests/others.at (Freezing modules)
	(--module-directory: absolute path, modpath2, modpath3)
	(M4MODPATH: absolute path, modtest, shadow, unload): Move to...
	* tests/modules.at: here, new file.
	* tests/others.at, tests/generate.awk: Add a banner.
	* tests/testsuite.at: Adjust.
	(AT_CHECK_M4_FILTER): New, but unused.

2001-08-29  Akim Demaille  <akim@epita.fr>

	* tests/testsuite.at (AT_CHECK_M4): Don't pass -I, let the tests
	handle that.
	* tests/others.at (wrap): Inline wrap.m4.
	(shadow): Inline shadow.m4.
	(iso8859): Don't specify the path from top_srcdir, but from srcdir.
	* tests/m4: Simplify.

2001-08-29  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am ($(srcdir)/$(TESTSUITE)): Use autom4te's
	--language.

2001-08-29  Akim Demaille  <akim@epita.fr>

	* tests/generate.awk (normalize): s/@__@/@&t@/.

2001-08-28  Akim Demaille  <akim@epita.fr>

	* examples/indir.m4, tests/others.at (indir): s/nonsens/nonsense/.

2001-08-28  Gary V. Vaughan  <gary@gnu.org>

	* bootstrap (generate.awk): Generate test cases with new script.

2001-08-27  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am (installcheck-local): Don't use
	`dc_install_base' which is not visible here, but `exec_prefix'
	which is clearly the RT anyway.
	* tests/testsuite.at (AT_CHECK_M4): Don't pass -M here since it is
	related to testing a now installed m4.
	* tests/m4: Do it here.

2001-08-27  Akim Demaille  <akim@epita.fr>

	* tests/others.at (indir): Formatting change.

2001-08-27  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am (installcheck-local): New.
	* tests/testsuite.at (AT_CHECK_M4): Pass `-b' so that C-c works on
	the test suite.
	Prefer options over envvars.
	* src/main.c (main): First bug caught by the test suite (yeah!):
	--batch lacked a `break' which resulted in an accidental
	invocation of --discard-comments.

2001-08-27  Akim Demaille  <akim@epita.fr>

	* tests/others.at (capitalize, changeword, comments, ddivert)
	(debug, esyscmd, exp, foreach, forloop, fstab, hanoi, include)
	(misc, multiquotes, patsubst, pushdef/popdef, regexp, reverse)
	(sysv-args, trace, translit, undivert): Don't rely on files in
	examples/: AT_DATA them.

2001-08-27  Akim Demaille  <akim@epita.fr>

	Let the test suite use a wrapper around the not installed m4 to
	pretend it is (installed).

	* bootstrap (aclocal.m4): Output AC_SUBST's and AM_CONDITIONAL's in
	such a way that m4 does not process them.
	* configure.in: The package name seems to be `m4', not `M4'.
	* tests/m4: New.
	* tests/atlocal.in (at_package, M4): Remove.
	* tests/testsuite.at, tests/others.at: Use m4, not $M4.

2001-08-27  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am (CLEANFILES): Remove.
	(DISTCLEANFILES, clean-local): New.
	* examples/mktests.sh: Remove.

2001-08-27  Akim Demaille  <akim@epita.fr>

	* Makefile.am (AUTOMAKE_OPTIONS): 1.5.
	Don't use aclocal: it's written by hand.
	* aclocal.m4: m4_include all the files instead of being built by
	aclocal.
	* bootstrap: Help automake find the AC_SUBSTs and AM_CONDITIONALs
	until it reads the traces by itself.
	* configure.in: Require Autoconf 2.42c as we are now using
	AC_CONFIG_TESTDIR instead of AT_CONFIG.
	Catch unexpanded `jm_' macros.
	* config/atconfig.m4: Remove.
	* config/error.m4: new.
	* config/Makefile.am: Ship the files included by aclocal.m4.
	* tests/Makefile.am (TESTSUITE_SOURCES): Rename as...
	(TESTSUITE_AT): this, to please Automake.
	(TESTSUITE): This target uses autotest/autotest.m4, not
	autotest/general.m4.
	* tests/testsuite.at: Prereq Autotest 2.52c.
	* examples/Makefile.am (pkgdata_DATA): Rename as...
	(dist_pkgdata_DATA): this.
	* doc/Makefile.am (man_MANS): Rename as...
	(dist_man_mans): this.

2001-08-20  Gary V. Vaughan  <gary@gnu.org>

	* m4/system.h [cygwin*]:  Thanks to Paul Sokolovsky and
	Robert Collins, building on Cygwin no longer requires Windows
	import and export symbol decorations.
	* m4/m4module.h (M4_SCOPE) [cygwin*]:  Deleted all occurences.
	* m4/error.h (M4_SCOPE) [cygwin*]: Ditto.
	* m4/debug.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* m4/error.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* m4/input.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* m4/macro.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* m4/output.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* m4/utilty.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* m4/xmalloc.c (M4_GLOBAL_DATA) [cygwin*]:  Ditto.
	* configure.in (LIBM4_DLL_IMPORT) [cygwin*]:  Don't set this
	anymore.
	* src/Makefile.am (AM_CPPFLAGS) [cygwin*]: Don't use it either!
	* modules/Makefile.am (AM_CPPFLAGS) [cygwin*]: Ditto.

2001-08-20  Gary V. Vaughan  <gary@gnu.org>

	Ansify the source.  Previously we had a mix, where my code was
	in a K&R compatible style, and the preexisting code was in ANSI
	style.  Nothing is lost wrt release 1.4 by reverting to ANSI,
	and now the code base is much cleaner.

	* m4/system.h:  Remove M4_PARAMS macro and all users.  Remove
	VOID macro and all users.
	* m4/m4module.h:  Ansify function prototypes and headers.
	* m4/builtin.c:  Ditto.
	* m4/evalparse.c:  Ditto.
	* m4/input.c:  Ditto.
	* m4/macro.c:  Ditto.
	* m4/module.c:  Ditto.
	* m4/output.c:  Ditto.
	* m4/path.c:  Ditto.
	* m4/symtab.c:  Ditto.
	* m4/utility.c:  Ditto.
	* modules/format.c:  Ditto.
	* modules/gnu.c:  Ditto.
	* modules/m4.c:  Ditto.
	* modules/mpeval.c:  Ditto.
	* src/freeze.c:  Ditto.
	* src/m4.h:  Ditto.
	* src/main.c:  Ditto.

2001-08-20  Akim Demaille  <akim@epita.fr>

	* config/atconfig.m4: s/EOF/ATEOF/, so that configure can be
	generated with stock 2.52.

2001-08-20  Akim Demaille  <akim@epita.fr>

	* config/atconfig.m4: New, until part of Autoconf per se.
	* configure.in (AT_CONFIG): Use it.
	Adjust.
	* tests/mkconfig.sh, tests/atconfig.in, tests/defs: Remove.
	* tests/atlocal.in: New.
	* tests/generate.awk: For the time being, the empty quadrigraph is
	`@__@'.
	* tests/others.at (changeword, gmp): Check the configuration
	variable against `yes'.
	* tests/testsuite.at (dnl): Allow it, as it's used all over the
	place.

2001-08-20  Akim Demaille  <akim@epita.fr>

	* m4/utility.c (m4_numeric_arg): Spell out the culprit.
	* modules/m4.c (undivert): Disable the possibility of undiverting
	several files at once: it is not documented, it is inconsistent
	with the other macros, it can be straightforwardly mocked by
	several invocations, and most importantly, it prevents the
	possibility of other kinds of extension.
	Use `m4_numeric_arg'.

2001-08-20  Akim Demaille  <akim@epita.fr>

	* examples/include.m4: Typo.
	* tests/generate.awk: Really add it.
	* tests/Makefile.am: Adjust.
	* tests/others.at (Discard comments): It sure fails without `-c'.
	(include, undivert): Add -I examples/.

2001-08-20  Akim Demaille  <akim@epita.fr>

	Use sprintf, not ecft and friends since it is standard, portable,
	simplifies the code, and since the latter is even deprecated
	according to the GNU libc documentation.

	* modules/format.c: Drop evct support.

2001-08-19  Gary V. Vaughan  <gary@gnu.org>

	* config/debug.m4 (M4_AC_CHECK_DEBUGGING): Cleaned up.  Don't test
	for `-pipe' here...
	* configure.in: ...do it here instead.

	* c-boxes.el: Deleted.
	* m4/builtin.c: Reformat box comments to be closer to GNU
	standards.
	* m4/debug.c:  Ditto.
	* m4/eval.c:  Ditto.
	* m4/evalparse.c:  Ditto.
	* m4/input.c:  Ditto.
	* m4/m4module.h:  Ditto.
	* m4/macro.c:  Ditto.
	* m4/output.c:  Ditto.
	* m4/symtab.c:  Ditto.
	* m4/utility.c:  Ditto.
	* modules/changeword.c:  Ditto.
	* modules/format.c:  Ditto.
	* modules/gnu.c:  Ditto.
	* modules/load.c:  Ditto.
	* modules/m4.c:  Ditto.
	* modules/modtest.c:  Ditto.
	* modules/mpeval.c:  Ditto.
	* modules/perl.c:  Ditto.
	* modules/shadow.c:  Ditto.
	* modules/stdlib.c:  Ditto.
	* modules/time.c:  Ditto.
	* src/freeze.c:  Ditto.
	* src/main.c:  Ditto.

2001-08-17  Gary V. Vaughan  <gary@gnu.org>

	* m4/module.c: Fixup some errors in the description comment.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* tests/others.at (iso8859): Specify the path to the M4 test file.
	* tests/testsuite.at (AT_CHECK_M4): Normalize the path of input
	files in error messages.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* tests/testsuite.at (AT_CHECK_M4): Anchor M4PATH in $top_srcdir.
	* tests/others.at: Adjust input files paths.
	* tests/atconfig.in: Set top_builddir.
	* tests/Makefile.am: Adjust.
	`testsuite' is in src, not build.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* tests/Makefile.am (EXTRA_DIST): Ship generate.awk.
	(generate.at): Install a temporary hack until the actual
	generate.awk is added to the repository.
	* tests/atconfig.in: New.

2001-08-17  Akim Demaille  <akim@epita.fr>

	Really apply the patch ``Drop Autoconf 2.13 compatibility.''

2001-08-17  Akim Demaille  <akim@epita.fr>

	* doc/m4.texinfo: Promote proper quotation.

2001-08-17  Akim Demaille  <akim@epita.fr>

	Remove the non Autotest tests.

	* tests/other-tests/capitalize.test,
	* tests/other-tests/changeword.test,
	* tests/other-tests/comments.test, tests/other-tests/ddivert.test,
	* tests/other-tests/debug.test,
	* tests/other-tests/discard-comments.m4,
	* tests/other-tests/discard-comments.test,
	* tests/other-tests/esyscmd.test, tests/other-tests/exp.test,
	* tests/other-tests/foreach.test, tests/other-tests/forloop.test,
	* tests/other-tests/frozen.m4, tests/other-tests/fstab.test,
	* tests/other-tests/gmp.m4, tests/other-tests/gmp.test,
	* tests/other-tests/hanoi.test,
	* tests/other-tests/import-environment.m4,
	* tests/other-tests/import-environment.test,
	* tests/other-tests/include.test, tests/other-tests/indir.test,
	* tests/other-tests/iso8859.m4, tests/other-tests/iso8859.test,
	* tests/other-tests/misc.test, tests/other-tests/modfreeze.test,
	* tests/other-tests/modpath1.test, tests/other-tests/modpath2.test,
	* tests/other-tests/modpath3.test, tests/other-tests/modpath4.test,
	* tests/other-tests/modtest.test,
	* tests/other-tests/multiquotes.test,
	* tests/other-tests/patsubst.test, tests/other-tests/pushpop.test,
	* tests/other-tests/regexp.test, tests/other-tests/reverse.test,
	* tests/other-tests/shadow.test, tests/other-tests/stackovf.test,
	* tests/other-tests/sync-lines.m4,
	* tests/other-tests/sync-lines.test,
	* tests/other-tests/sysv-args.test, tests/other-tests/trace.test,
	* tests/other-tests/translit.test, tests/other-tests/undivert.test,
	* tests/other-tests/unfrozen.m4, tests/other-tests/unload.test,
	* tests/other-tests/wrap.test: Remove.

	* tests/run-test, tests/get-them: Remove.
	* tests/Makefile.am: Adjust.

2001-08-17  Akim Demaille  <akim@epita.fr>

	others.at no longer depends on other-tests/.

	* tests/others.at (stackovf): You're actually...
	(sync-lines): this.
	(modfreeze, modpath1, modpath2, modpath3, modpath4, modtest, shadow)
	(unload.test): Keep their authorship.
	(discard-comments, gmp, import-environment, modfreeze)
	(sync-lines): Embed the input files.
	* tests/stackovf.test: Copy from other-tests/stackovf.test.
	* tests/iso8850.m4: Copy from other-tests/iso8859.m4.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* doc/m4.texinfo (Esyscmd): Fix the paths in the Vice example.
	(M4exit): Tag the exit status of the example.
	* tests/get-them: Adjust.
	* tests/generate.awk: New, based on get-them.
	* tests/Makefile.am: Adjust to generate `generated.at'.
	* tests/testsuite.at: Adjust.
	(AT_CHECK_M4): Don't overquote.  Blush...

2001-08-17  Akim Demaille  <akim@epita.fr>

	Start using Autotest.  atconfig creation is still lacking.

	* examples/patsubst.m4, modules/modtest.m4, modules/shadow.m4,
	* examples/reverse.m4, tests/other-tests/import-environment.m4,
	* tests/other-tests/iso8859.m4: Don't produce trailing blanks.
	* tests/other-tests/import-environment.test: Don't check LANGUAGE
	as it might be `unset', or set to `C'.
	* tests/other-tests/iso8859.test, tests/other-tests/modpath1.test,
	* tests/other-tests/modpath2.test, tests/other-tests/modpath3.test,
	* tests/other-tests/modpath4.test, tests/other-tests/modtest.test,
	* tests/other-tests/patsubst.test, tests/other-tests/reverse.test,
	* tests/other-tests/shadow.test: Adjust.
	* tests/testsuite.at, tests/others.at: New.
	* tests/Makefile.am: Adjust.

2001-08-17  Akim Demaille  <akim@epita.fr>

	Drop Autoconf 2.13 compatibility.

	* configure.in (changeword): No need to undefine it, as anyway if
	it's defined, M4sugar moved it as m4_changeword.
	And anyway, proper quotation is enough.
	(m4_pattern_allow): As it exists in 2.50, just use it.
	(AC_OUTPUT): Split in AC_CONFIG_FILES and AC_CONFIG_COMMANDS.
	Don't handle Gettext's duties, let it handle them.
	* config/gnu-obstack.m4: Use m4_pattern_allow directly.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* modules/m4.c (m4_dumpdef): Output to stderr, not m4_debug.
	(m4_errprint): Use fputs.
	* doc/m4.texinfo (Invoking m4) <--error-output>: errprint and
	dumpdef are not concerned.
	(Dumpdef, Errprint): Emphasize their insensitivity to
	--error-output.
	* doc/Makefile.am: Add `TAGS' support.
	(MAINTAINERCLEANFILES): Remove texinfo.tex and mdate-sh which are
	in `config/' now.
	* config/Makefile.am (MAINTAINERCLEANFILES): New.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* modules/Makefile.am (ETAGS_ARGS): New.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* m4/symtab.c (m4_hack_all_symbols, m4_lookup_symbol): Formatting
	changes.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* m4/builtin.c (m4_macro_define): Do not reset SYMBOL_TRACED.

2001-08-17  Akim Demaille  <akim@epita.fr>

	* m4/m4module.h (m4/list.h): Don't include it.

2001-08-16  Gary V. Vaughan  <gary@gnu.org>

	m4_modules are no more, we use lt_dlhandles directly and let
	latest libltdl features manage the list of loaded modules.
	* acinclude.m4: Regenerated.
	* m4/ltdl.c: Updated from master copy.
	* m4/module.c: Reimplemented to take advantage of advances in
	libltdl.
	* m4/builtin.c (m4_builtin_find_by_name): Traverse loaded module
	list with lt_dlhandle_next.
	(m4_builtin_find_by_func): Ditto.
	(m4_builtin_table_install): Use lt_dlhandle.
	(m4_macro_define): Ditto.
	(m4_macro_table_install): Ditto.
	m4/module.h: Prototype new module management API.
	(m4_modules): No longer required.
	(m4_module_init_t, m4_module_finish_t): POSIX namespace
	violations, renamed to...
	(m4_module_init_func, m4_module_finish_func): ...these,
	respectively.
	(M4INIT_HANDLER): Clean way to declare init functions in modules.
	(M4FINISH_HANDLER):  And similarly for finish functions.
	* m4/system.h (_CONC): Used by M4INIT_HANDLER and M4FINISH_HANDLER
	-- Add indirection to the CONC macro so that arguments are
	correctly expanded.
	* modules/modtest.c (m4_init_module):  Replaced with M4INIT_HANDLER.
	* modules/shadow.c (m4_init_module):  Ditto.
	Due to new init function semantics, be careful to perform the
	initialisation only on first load.
	* modules/perl.c (m4_init_module):  Ditto. And Ditto.
	(m4_finish_module): Replaced with M4FINISH_HANDLER.
	Due to new finish function semantics, be careful to perform the
	finalisation only on first load.
	* m4/m4private.h (m4_module): Removed in favour of...
	(m4_module_data): ...structure without all the wrapper fields.
	Instances of this new structure are stored associated lt_dlhandles
	with lt_dlcaller_data_set().
	* m4/builtin.c (m4_builtin_define): Takes a handle argument
	instead of the old module argument.
	(m4_builtin_table_install): Ditto.
	* modules/load.c (m4_resident_module):  Removed.  This is no
	longer implemented as a magic symbol...
	* modules/m4.c (m4_resident_module): Ditto.
	* modules/load.c (M4INIT_HANDLER): ...the module init function now
	uses the ltdl api to make the module resident.
	* modules/m4.c (M4INIT_HANDLER): Ditto.
	* modules/load.c (builtin_modules): Traverse the loaded module
	list with lt_dlhandle_next.
	(builtin_load): Much simplified in light of the reimplemented
	module loader.
	* src/freeze.c (produce_module_dump):  Cleaned up and optimised in
	light of the m4/module.c rewrite.
	(produce_symbol_dump): Ditto.
	(reload_frozen_state): Ditto.
	* m4/list.c, m4/list.h: Files deleted.  No longer required.
	* m4/Makefile.am (pkginc_HEADERS): Delete list.h reference.
	(libm4_la_SOURCES): Delete list.c reference.
	* m4/m4private.h (m4_token_data):  Add a handle field.  This
	eliminates many of the searches to find the handle associated with
	various tokens that are passed between functions.
	(struct m4_symbol):  Removed the module field.  The
	module association does not belong with the symbol...
	* m4/input.c (struct m4_builtin): ...it belongs with the builtin
	that the module implementation code is from.  Added a handle
	field.
	(m4_push_macro): Add a `handle' argument.  Changed all callers.
	(init_macro_token):  Set the `handle' field for the
	m4_token_data.
	* m4/macro.c (expand_argument): Copy the new handle field during
	reassignment.
	* modules/m4.c (macro_install): Use the new handle field to
	optimise the search for the correct builtin structure, and pass
	the handle details to m4_builtin_define.

2001-08-15  Akim Demaille  <akim@epita.fr>

	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Be sure `m4/' exists
	when creating `m4/obstack.h'.
	* tests/Makefile.am (TESTS_ENVIRONMENT): Pass top_srcdir and
	top_builddir.
	* tests/defs: Make them absolute.
	(CDPATH) Neutralize.
	* tests/gethem: Use them.

2001-08-14  Gary V. Vaughan  <gary@gnu.org>

	* config/ltmain.sh: Doh!  Import again for a quoting fix that
	prevented any regression test from passing.

	* m4/m4module.h (obstack.h): Choose between installed version
	and shipped version based on configure tests.
	* src/freeze.c (obstack.h): Ditto.

	* acconfig.h: Removed.  No longer required.

	* bootstrap: Rewritten to play nicely with Autoconf 2.5x.
	* configure.in (MY_NAME, MY_VERSION): Define these once, and feed
	them to AC_INIT and AM_INIT_AUTOMAKE.
	* Makefile.am (AUTOMAKE_OPTIONS): Remove `gnits' which would
	disallow MY_NAME and MY_VERSION arguments to AM_INIT_AUTOMAKE.
	* config/gnu-obstack.m4 (M4_AC_FUNC_OBSTACK): Don't choke on
	shell variable m4_cv_func_obstack_h.
	* tests/defs (M4): Be more careful about relative path to libtool
	script and m4 binary by using $srcdir.

	* src/main.c (main): Use lt_dlinsertsearchdir to prepend -M
	optargs to the existing libltdl search path.
	* acinclude.m4: Regenerate from latest libtool,m4 and ltdl.m4.
	* m4/ltdl.c: Updated.
	* m4/ltdl.h: Ditto.
	* config/ltmain.sh: Ditto.

2001-08-11  Gary V. Vaughan  <gary@gnu.org>

	* src/main.c (main): Add `-b' (for `batch') mode switch to force
	interactive mode off.

2001-08-10  Akim Demaille  <akim@epita.fr>

	* configure.in: Require Autoconf 2.52.
	(AC_ARG_PROGRAM): Remove, handled by Automake.
	(m4_getopt): Rename as...
	(m4_getopt_h): this.
	Allow the tokens `m4_cv_*', `m4_top_srcdir', and `m4_getopt_h'.
	Undefine `changeword' only if defined.
	* config/gnu-obstack.m4: Require Autoconf 2.52.
	(M4_AC_FUNC_OBSTACK): Rename `m4_obstack' and `m4_obstack_h'.
	Allow this token.

2001-08-09  Yuji Minejima  <ggb01164@nifty.ne.jp>

	* doc/m4.texinfo: Fix some typos, and apply some small
	clarifications.

2001-08-09  Andreas Schwab  <schwab@suse.de>

	* src/main.c (main): Fix improper uses of error (missing format
	string).

2001-08-07  Akim Demaille  <akim@epita.fr>

	Improve `make distcheck'.

	* configure.in: Be sure to be able to run `mkconfig.sh' when src
	!= build.
	* Makefile.am (dist-hook): Remove, as it is no longer needed.
	* doc/m4.texinfo (Include): Add missing blank.
	* m4/Makefile.am (EXTRA_DIST): Distribute gnu-obstack.h and
	obstack.c.

2001-08-07  Akim Demaille  <akim@epita.fr>

	* m4/evalparse.c: A better introductory comment.
	* m4/m4module.h (M4_DEBUG_PRINT2): s/M4_debug/m4_debug/.
	* m4/macro.c: Adjust old comments.
	* modules/README: Typo.

2001-08-07  Akim Demaille  <akim@epita.fr>

	* config/gnu-obstack.m4: New.

2001-08-07  Akim Demaille  <akim@epita.fr>

	* config/Makefile.am, config/stackovf.m4: New.
	* configure.in, Makefile.am: Adjust.

2001-08-05  gettextize  <bug-gnu-utils@gnu.org>

	* po/Makefile.in.in: Upgrade to gettext-0.10.39.
	* po/cat-id-tbl.c: Remove file.
	* po/stamp-cat-id: Remove file.

2001-04-08  Roderick Koehle <Roderick.Koehle@infineon.com>

	* modules/format.c (format):  Formatting for %f was not
	interpreting the position of the decimal point correctly for
	whole numbers.

2000-12-01  Gary V. Vaughan  <gary@gnu.org>

	* TODO:  Removed m4exit bug.
	* modules/load.c (m4_resident_module): Make this module resident.
	* module/m4.c (m4_resident_module): Ditto.
	* m4/modules.c (m4_module_load):  Use new ltdl resident modules
	feature to mark modules as resident if they export
	`m4_resident_module' as TRUE.
	(m4_module_unload): Do not remove resident modules, and take care
	with symbol insertion and deletion with resident modules.
	* m4/ltdl.c, m4/ltdl.h: Update to latest unreleased versions to
	use resident modules feature.

2000-11-30  Gary V. Vaughan  <gary@gnu.org>

	* TODO: Updated.  Removed some cruft that has since been fixed
	or implemented.  Added some more entries.
	* NEWS: Updated.
	* README: Updated.
	* modules/README: Updated.
	* doc/m4.texinfo: Updated.

	* modules/gnu.c (builtin_functions): Make indir orthogonal to
	builtin, in that each is recognised as a macro only with parameters
	(builtin_indir): Passing 0 arguments is now an error, as with
	builtin.

	* src/main.c (usage): Added missing description of `-c' option.

2000-11-29  Gary V. Vaughan  <gary@gnu.org>

	Consolidate the myriad of dispersed test scripts into the
	tests subdirectory.  I think I now have all the file where I
	want them, so there shouldn't be anymore upheaval =)O|
	Honest!
	* tests/Makefile.am: Updated to run the new tests added below.
	* tests/other-tests/capitalize.test, tests/other-tests/comments.test,
	tests/other-tests/ddivert.test, tests/other-tests/debug.test,
	tests/other-tests/esyscmd.test, tests/other-tests/exp.test,
	tests/other-tests/foreach.test, tests/other-tests/forloop.test,
	tests/other-tests/frozen.m4, tests/other-tests/fstab.test,
	tests/other-tests/hanoi.test, tests/other-tests/include.test,
	tests/other-tests/indir.test, tests/other-tests/misc.test,
	tests/other-tests/modfreeze.test, tests/other-tests/modpath1.test,
	tests/other-tests/modpath2.test, tests/other-tests/modpath3.test,
	tests/other-tests/modpath4.test, tests/other-tests/modtest.test,
	tests/other-tests/multiquotes.test, tests/other-tests/patsubst.test,
	tests/other-tests/pushpop.test, tests/other-tests/regexp.test,
	tests/other-tests/reverse.test, tests/other-tests/shadow.test,
	tests/other-tests/sysv-args.test, tests/other-tests/trace.test,
	tests/other-tests/translit.test, tests/other-tests/undivert.test,
	tests/other-tests/unfrozen.m4, tests/other-tests/unload.test,
	tests/other-tests/wrap.test:  New tests based on the contents
	of the tests removed below.
	* examples/Makefile.am, modules/Makefile.am:  Updated to
	reflect removed tests.
	* examples/defs,modules/defs: Removed.
	* examples/capitalize.test, examples/comments.test,
	examples/ddivert.test, examples/debug.test,
	examples/esyscmd.test, examples/exp.test,
	examples/foreach.test, examples/forloop.test,
	examples/fstab.test, examples/hanoi.test,
	examples/include.test, examples/indir.test,
	examples/misc.test, examples/multiquotes.test,
	examples/patsubst.test, examples/pushpop.test,
	examples/regexp.test, examples/reverse.test,
	examples/sysv-args.test, examples/trace.test,
	examples/translit.test, examples/undivert.test,
	examples/wrap.test, modules/frozen.m4, modules/modfreeze.test,
	modules/modpath1.test, modules/modpath2.test,
	modules/modpath3.test, modules/modpath4.test,
	modules/modtest.test, modules/shadow.test,
	modules/unfrozen.m4, modules/unload.test: Removed.

	Move the implementation of GMP support for the mpeval() builtin
	into a loadable module that depends on libgmp.  mpeval() and
	eval() share a common parser, now in m4/evalparser.c; the code
	in m4/numb.c and m4/numb.h is now physically split between
	m4/eval.c (the eval() backend) and modules/mpeval.c (the
	mpeval() backend), rather than being differentiated by cpp
	macros and multiple inclusion.  The mpeval module is always
	built but will generate an diagnostic if it is used from an
	installation that didn't link in the gmp library.
	* modules/Makefile.am: build and install the new mpeval module.
	* modules/mpeval.c: Now contains the former parts of m4/numb.c
	and m4/numb.h that are required for gmp support in mpeval().
	* m4/Makefile.am (libm4_la_SOURCES): Removed evalmp.c.
	* m4/evalmp.c:  Removed.
	* m4/m4module.h: Removed conditional prototype for
	m4_mp_evaluate().
	* m4/eval.c: Rewritten.  Contains the former parts of m4/numb.c
	and m4/numb.h that do not rely on gmp.
	* m4/evalparse.c:  New file, contains the shared parts of the
	eval() and evalmp() parser implementations, and is no longer
	unencumbered by cpp magic to uncover the right parts.
	* m4/numb.h:  Removed.  It's former contents are split between
	m4/eval.c and modules/mpeval.c.
	* m4/numb.c: ditto.

	* tests/other-tests/changeword.test: New test.  Rudimentary
	testing of changeword builtin runs only if --wnable-changeword
	was used at configure time.
	* tests/mkconfig.sh: Solaris sed (at least) does not parse nested
	alternation correctly.  Split into two expressions to compensate.
	* m4/input.c (m4_input_init): Use m4_ prefix on m4_set_word_regexp.
	* modules/Makefile.am: Build changeword module.
	* modules/changeword.c (m4_macro_table): Define __m4_changeword__
	only when --enable-changeword was passed to configure.
	(builtin_changeword): If --enable-changeword was not used, then
	report that changeword() builtin has no support in m4 binary.

2000-11-28  Gary V. Vaughan  <gary@gnu.org>

	* src/main.c (main): Fixed a particularly nasty bug is
	user_search_path setting -- the -M flag processing must be
	extremely careful with search path ordering, or else the default
	installed module directory (possibly containing modules from a
	previous release) is placed earlier in the search path than any -M
	arguments (which are relied upon to load uninstalled modules with
	most of the tests in the regresion suite).

	* modules/load.c (builtin_load):  Nasty hack to prevent adding
	symbols to symtab again if a module is loaded more than once.
	* modules/m4.c (builtin_ifelse): removed unused variable argv0.

	* m4/symtab.c (m4_remove_table_reference_symbols):  Fixed a
	possible NULL pointer dereference.

	* m4/module.c (m4_module_find_by_modname): Renamed from
	m4_module_modname_find.   Fixed all references.
	(m4_module_find_by_builtin):  New function.

	* modules/modfreeze.test: load the `load' module with each
	invocation.
	* src/freeze.c (produce_frozen_state): Simplified in light of
	module field in m4_symbol.  Allow a third argument for text macros
	to name the originating module.
	(reload_frozen_state): ditto.
	* m4/m4module.h:  Fixup prototypes.
	* m4/builtin.h (m4_builtin_define): Add a module argument so
	that symbols can be registered against the defining module.
	(m4_macro_define): ditto.
	* m4/m4private.h (m4_symbol): Make the module field const to save
	on casting in the rest of the code.
	(SYMBOL_MODULE): New macro.

	* m4/symtab.c (m4_remove_table_reference_symbols): Fixed stupid
	symbol reference maintenance bugs when removing a symbol from the
	symtab.

	* src/stackovf.c (setup_stackovf_trap): Fixed some memory leaks.

2000-11-27  Gary V. Vaughan  <gary@gnu.org>

	* configure.in (m4_cv_func_obstack): A better check for whether
	libc has an obstack implementation.
	* m4/Makefile.am (EXTRA_libm4_la_SOURCES): add gnu-obstack.h.

	* configure.in (--with-modules): Changed semantics.  This
	option is now used to list modules to be preopened.
	* src/m4.h: #include "ltdl.h" unconditionally.
	* src/main.c: Removed all dependencies on WITH_MODULES.
	* src/freeze.c: ditto.
	* modules/Makefile.am: ditto.
	* m4/m4.c (builtin_m4exit): ditto.
	* modules/modpath1.test: ditto.
	* modules/modpath2.test: ditto.
	* modules/modpath3.test: ditto.
	* modules/modpath4.test: ditto.
	* modules/modtest.test: ditto.
	* modules/shadow.test: ditto.
	* modules/unload.test: ditto.

	* m4/Makefile.am (libm4_la_SOURCES): Removed obstack.c, since it
	comes up on demand in LTLIBOBJS now.
	* configure.in (getopt_long):  Creating and relying on a link for
	getopt.h on hosts with no getopt_long() of thier own works
	correctly now.  This is necessary so that callers of getopt_long()
	can simply `#include <getopt.h>': the naive way of doing this
	would end up using our own getopt.h and the installed
	getopt_long(), which is asking for trouble!
	(obstack_init): A similar argument applies to obstack.h and
	obstack_init().

	* m4/ltdl.c: Upgraded to latest bleeding edge version again.
	On Solaris-2.5 (at least) the native dlopen implementation
	gets confused about m4.o when looking for module "m4".  This
	version always looks for .la an .$lib_ext suffixed names first
	to work around the problem.  Sigh.

	* po/POTFILES.in: Take account of these file movements.
	* src/Makefile.am (m4_SOURCES): removed eval.c.
	(EXTRA_m4_SOURCES): removed numb.c and numb.h.
	* m4/Makefile.am (libm4_la_SOURCES): added eval.c.
	(EXTRA_libm4_la_SOURCES): added numb.c and numb.h.
	* modules/m4.c (builtin_eval): Use m4_evaluate().
	* m4/eval.c: Moved here from src/eval.c to facilitate
	implementation of eval() builtin as part of the `m4' loadable
	module.
	(m4_evaluate): renamed from evaluate for namespace cleanliness.
	* m4/numb.c: Moved here from src/numb.c, since it is #included
	into eval.c at compile time.
	* m4/m4module.h (m4_evaluate): Added prototype.
	* src/m4.h (evaluate): Removed prototype.

2000-11-25  Gary V. Vaughan  <gary@gnu.org>

	* modules/perl.c (builtin_perleval):  Use PL_na for
	compatibility with perl-5.6.

	* src/main.c (main):  It is now safe to
	``m4_module_install("m4")'', without tripping over the m4
	binary itself!
	* m4/ltdl.h, m4/ltdl.c: Upgraded to latest bleeding edge
	versions having fixed the insidious module search order bug.

	* m4/Makefile.am (libm4_la_LIBADD): New magic -- we are
	supposed to be using @LIBADD_DL@; @DLLDFLAGS@ is dead.

	* configure.in: Figure out whether to use the installed
	getopt.h or the supplied one.
	* src/Makefile.am: ditto.

	* po/POTFILES.in: List files in their new positions.

	* config/ltmain.sh:  This needs to be checked in to match the
	libtool macros copied to acinclude.m4 (until a released
	libtool copes with m4's needs).
	* bootstrap:  Run gettextize.

2000-11-24  Gary V. Vaughan  <gary@gnu.org>

	* AUTHORS:  Added my details.
	* TODO: updated.
	* NEWS: updated.
	* bootstrap: temporary update until released libtool catches up.

	* All files:  Use new GNU GPL copyright blurb with current contact
	address.

	* configure.in (LTLIBOBJS): Use canonical code for calculation of
	this variable.

	* config: renamed acm4 directory to config to be more like
	other autoconfiscated packages.

	* configure.in (M4_AC_CHECK_DEBUGGING): Use it.
	* config/debug.m4:  New file implementing configure macros to add
	suitable debug flags to the compiler invocation.

	* modules/load.c:  New file implementing the ``load'' and
	``unload'' builtins.
	* tests/get-them:  Set the module search directory to the modules
	build directory in generated tests.
	* modules/shadow.test: ditto.
	* modules/modtest.test: ditto.
	* modules/modpath1.test: ditto.
	* modules/modpath2.test: ditto.
	* modules/modpath3.test: ditto.
	* modules/modpath4.test: ditto.
	* modules/modtest.test: ditto.
	* modules/modfreeze.test: ditto.
	* modules/unload.test: ditto.

	* modules/changeword.c:  New file implementing the ``changeword''
	builtin as a loadable module.
	* modules/mpeval.c:  New file implementing the ``mpeval'' builtin
	as a loadable module.

	* src/main.c (main):  Load the gnu module if m4 was started
	normally -- i.e. without the -G option.
	* modules/gnu.c:  New file implementing a new loadable module wuth
	definitions for all the gnu extension builtins.
	* modules/format.c:  Moved here from src/format.c.  Now included
	directly by gnu.c.

	* src/main.c (main):  Load the traditional module if m4 was
	started in `no_gnu_extensions' mode.
	* modules/traditional.c:  New file implementing the ``unix'' macro,
	required when m4 is executed in traditional mode, as a loadable
	module.

	* src/main.c:  Renamed from m4.c to avoid confusion with
	modules/m4.c.
	(main):  Always load the m4 module.
	* modules/m4.c:  New file implementing a new loadable module with
	definitions for all m4 builtins that are not gnu extensions.

	* m4/Makefile.am:  Adjusted to take new files below into account.
	* m4/m4module.h: Prototypes for exported functions and types moved
	to this directory from the src directory.
	* m4/m4private.h: Moved here from src/m4private.h to facilitate
	the migration of all builtin implementations to loadable modules.
	* m4/macro.c: Moved this file here from the src directory,
	renaming all exported symbols to use the prefix ``m4_''.
	* m4/builtin.c: ditto.
	* m4/module.c: ditto.
	* m4/symtab.c: ditto.
	* m4/debug.c: ditto.
	* m4/input.c: ditto.
	* m4/output.c: ditto.
	* m4/path.c: ditto.
	* m4/ltdl.h, m4/ltdl.c: ditto.
	* m4/utility.c: Odd functions moved here from files in the src
	directory to facilitate builtin migration.

2000-08-12  Gary V. Vaughan  <gary@gnu.org>

	* src/builtin.c (dump_symbols): Use "Undefined name `%s'" for
	error message, to make translators' jobs a little easier.
	(builtin_builtin): ditto.
	(builtin_traceon): ditto.
	(builtin_traceoff): ditto.
	Reported by Akim Demaille <akim@epita.fr>

	* m4/Makefile.am (pkgincdir):  Deleted.  Use automake's built in
	pkgincludedir instead.

	* m4/m4module.h (rquote): Renamed with a prefix of `m4_' since
	it is exported globally.  Fixed all references.
	(lquote): ditto.
	(bcomm): ditto.
	(ecomm): ditto.
	(DEF_RQUOTE): Renamed with a prefix of `M4_' since it is exported
	globally.  Fixed all references.
	(DEF_LQUOTE): ditto.
	(DEF_BCOMM): ditto.
	(DEF_ECOMM): ditto.

2000-07-28  Gary V. Vaughan  <gary@gnu.org>

	* NEWS: updated.
	* TODO: updated.

	* configure.in (AC_CHECK_FUNCS): added bzero and calloc.
	(AC_OUTPUT): touch stamp-h.in, not stamp-h.

	* doc/m4.texinfo: Fixed to work with --html option of makeinfo.
	Removed `Prev', `Next' and `Up' fields of all @nodes now that
	makeinfo calculates them for us, and to make any future
	reorganisation easier.
	(Frozen files): Document format version 2.
	`V' now takes argument `2'.
	`F' can take a single argument if symbol and builtin names
	are the same, or 3 arguments if the builtin is from a module.
	New `S' specification for saving syntax table contents.
	New `M' specification for saving loaded module names.
	* src/freeze.c: Implement them.
	* src/input.c (syntax_code): For interpreting frozen syntax
	state.

	* examples/Makefile.am:  Add the contents of the WWW directory to
	the distribution.
	* examples/WWW/Makefile:  ditto,
	(%.htm): Compares file contents (not just sizes) to determine
	whether a change has occured.
	* examples/WWW/_header.htm: Bumped version number.
	* examples/WWW: Regenerated content.

	* m4/Makefile.am (AUTOMAKE_OPTIONS): Support for non-ANSI
	compilers comes much easier without ansi2knr.
	* src/Makefile.am (AUTOMAKE_OPTIONS): ditto.

	* m4/list.c: New generic list container type.
	* m4/list.h: Interface to new container type.
	* m4/Makefile.am (pkginc_HEADERS): Install list.h.
	(libm4_la_SOURCES): compile and link list.c.
	* src/builtin.c (builtin_tables): Use list container.
	* src/module.c (symtab): ditto.
	* src/symtab.c (symtab): ditto.

	* m4/system.h: New file for common preprocessor definitions.
	* m4/Makefile.am (pkginc_HEADERS): install system.h.
	* m4/error.c: Use system.h in place of inline preprocessor.
	* m4/error.h: ditto.
	* m4/module.c: ditto.
	* m4/module.h: ditto.
	* m4/xmalloc.c: ditto.

	* m4/error.h (error_one_per_line): Make M4_GLOBAL_DATA for WIN32
	compatibility.
	* m4/xmalloc.c (xmalloc_exit_failure): ditto.

	* m4module.h (syntax_table): Renamed with a prefix of `m4_' since
	it is exported globally.  Fixed all references.
	(builtin): ditto.
	(module_init_t): ditto.
	(module_finish_t): ditto.
	(token_data): ditto.
	(SYNTAX_OTHER): Renamed with a prefix of `M4_' since
	it is exported globally.  Fixed all references.
	(SYNTAX_IGNORE): ditto.
	(SYNTAX_SPACE): ditto.
	(SYNTAX_OPEN): ditto.
	(SYNTAX_CLOSE): ditto.
	(SYNTAX_COMMA): ditto.
	(SYNTAX_DOLLAR): ditto.
	(SYNTAX_ACTIVE): ditto.
	(SYNTAX_ESCAPE): ditto.
	(SYNTAX_ALPHA): ditto.
	(SYNTAX_NUM): ditto.
	(SYNTAX_ALNUM): ditto.
	(SYNTAX_LQUOTE): ditto.
	(SYNTAX_RQUOTE): ditto.
	(SYNTAX_BCOMM): ditto.
	(SYNTAX_ECOMM): ditto.
	(SYNTAX_VALUE): ditto.
	(SYNTAX_MASKS): ditto.
	(IS_OTHER): ditto.
	(IS_IGNORE): ditto.
	(IS_SPACE): ditto.
	(IS_OPEN): ditto.
	(IS_CLOSE): ditto.
	(IS_COMMA): ditto.
	(IS_DOLLAR): ditto.
	(IS_ACTIVE): ditto.
	(IS_ESCAPE): ditto.
	(IS_ALPHA): ditto.
	(IS_NUM): ditto.
	(IS_ALNUM): ditto.
	(IS_LQUOTE): ditto.
	(IS_RQUOTE): ditto.
	(IS_BCOMM): ditto.
	(IS_ECOMM): ditto.
	(TOKEN_EOF): ditto.
	(TOKEN_NONE): ditto.
	(TOKEN_STRING): ditto.
	(TOKEN_SPACE): ditto.
	(TOKEN_WORD): ditto.
	(TOKEN_SIMPLE): ditto.
	(TOKEN_MACDEF): ditto.

	* m4/m4module.h (voidstar): Removed in favour of `VOID' for
	consistency.  Fixed all references.
	(STRING): Renamed to `m4_string' for consistency, and because if
	is exported globally.  Fixed all references.
	(token_type): Renamed to `m4_token_t' for the same reasons.
	(token_data_type): Renamed to `m4_token_data_t' for the same
	reasons.

	* m4/m4module.h (XCALLOC): Wrapper macro which handles type
	sizes.
	(XMALLOC): ditto.
	(XREALLOC): ditto.
	(XFREE): Wrapper macro which avoids freeing NULL pointers.

	* m4/m4module.h (m4_macro):  New type for module defined user
	macros.
	* modules/modtest.c (m4_macro_table):  Define module user macros.
	* modules/shadow.c (m4_macro_table):  ditto.

	* m4/m4module.h (M4BUILTIN_HANDLER):  For defining handlers
	declared with M4BUILTIN.

	* m4/xmalloc.c: Use memset if bzero is not available when
	emulating calloc with malloc.
	(xcalloc): Fallback to malloc/bzero if calloc is not available.
	(xfree): Added for consistency.  Will not try to free NULL
	pointers.
	* src/m4.c (xfree):  Deleted in favour of the above.
	* m4/xmalloc.c (WITH_DMALLOC): preprocess away the entire file if
	linking with libdmalloc.
	* m4/xstrdup.c (WITH_DMALLOC): ditto.

	* modules/frozen.m4:  New test case.
	* modules/unfrozen.m4:  ditto.
	* modules/modfreeze.test:  New test.
	* modules/unload.test:  ditto.
	* modules/Makefile.am (EXTRA_DIST):  Distribute them.
	(TESTS): Use them.
	* modules/modpath1.test:  Don't try this test if module support is
	not compiled in.
	* modules/modpath2.test: ditto.
	* modules/modpath3.test: ditto.
	* modules/modpath4.test: ditto.
	* modules/modtest.test: ditto.
	* modules/shadow.test: ditto.

	* modules/perl.c: New module.
	* modules/perl.m4: Example of using it.
	* modules/Makefile.am (perl_la_SOURCES):  Build new perl module.

	* src/m4.c (main): Assume interactive mode if STDIN is connected
	to a tty.
	Changed startup sequence slightly so that syntax is not
	initialised from here when loading a frozen file.

	* src/builtin.c:  Much improved macro definition style.
	* src/m4private.h:  Internal structures for m4_builtin and
	m4_macro instances.  These are not exposed to module writers.
	* src/module.c (module_modname_find):  Find a module structure
	from the its name.
	(make_macro_table):  Build an internal macro table from a external
	definition.
	(make_builtin_table):  Build an internal builtin table from an
	external definition.

	* src/module.c (module_unload): Be extremely careful to remove
	builtins and macros that match the module being unloaded -- no
	longer assume that the top element can be removed incase another
	odule defines an identical name.
	* src/symtab.c (remove_table_reference_symbols): remove all symbol
	table entries which refer to a given builtin table.
	* src/builtin.c (remove_tables): Use it!

2000-07-13  Thomas Tanner  <tanner@ffii.org>

	* Makefile.am (SUBDIRS): we need modules/ for "make dist"
	* acm4/modules.m4: deleted
	* bootstrap: don't libtoolize libltdl!
	* configure.in: AC_SUBST INCLTDL and LIBLTDL, -with-modules flag:
	if set, enable WITH_MODULES and add modules to DLPREOPEN
	* examples/misc.test: redirect standard output
	* lib/Makefile.am: don't use DLLDFLAGS
	* lib/m4module.c: include necessary headers to silence GCC -Wall
	* lib/m4regex.c: fixes to silence GCC -Wall
	* modules/Makefile.am: don't use DLLDFLAGS, add INCLTDL to INCLUDES,
	  build modules conditionally
	* modules/shadow.c: define symbol aliases before using them
	* modules/test.c: define symbol aliases before using them
	* po/de.po: update translation
	* src/Makefile.am: delete pathconf.h, set MODULE_PATH to
	pkglibexecdir, don't use DLLDFLAGS, add INCLTDL to INCLUDES and
	LIBLTDL to LIBS.
	* src/m4.c: initialize libltdl's preloaded symbols via
	LTDL_SET_PRELOADED_SYMBOLS
	* src/module.c: libltdl's memory management must be initialized
	before calling lt_dlinit!, fix warnings

2000-01-18  Gary V. Vaughan  <gary@gnu.org>

	* README:  Caveat about nls not supported by dll architecture on
	Windows.

	* TODO (MODULE SPECIFIC ISSUES): more ideas for the future.

	* tests/Makefile.am (stamp-TESTS):  now works with VPATH.
	* src/Makefile.am (m4_LDADD):  use $(builddir) for VPATH.
	* modules/Makefile.am (LIBS): ditto.
	(INCLUDES): search $(top_srcdir) (for eg. <m4/error.h>) and then
	$(top_srcdir)/m4 (for only <m4module.h>).
	* modules/shadow.test: fixed for VPATH.
	* modules/modtest.test: ditto.
	* modules/modpath4.test: ditto.
	* modules/modpath3.test: ditto.
	* modules/modpath2.test: ditto.
	* modules/modpath1.test: ditto.

	* modules/time.test: Removed due to timezone dependence,
	* modules/Makefile.am (TESTS): Removed time.test.

	* configure.in: Use $3 of AC_DEFINE so that we can,,,
	* acconfig.h: Remove everything except the gettext parameters.
	* acm4/gmp.m4: Add a serial number, and take advantage of $3 of
	AC_DEFINE.
	* acm4/ltdl.m4:  Updated to latest from libtool cvs.
	* acm4/modules.m4:  Remove code which duplicates ltdl.m4 and
	increment serial number.

	* Makefile.am (SUBDIRS): Moved @MODULES_DIR@ to compile before
	src dir and immediately after libm4 is built for confidence that
	it doesn't rely on the src directory.
	(SUBDIRS): Moved doc dir to the end since helptoman.pl and
	makeinfo stop the build on cygwin (because they don't work).

	* src/m4.h: use GNU standard #if HAVE_CONFIG_H ideom.

	* m4/m4private.h: ...is not a public header, so moved to src.
	Add `#include <config.h>', `#define _COMPILING_M4' and
	`#include "m4.h".
	* m4/Makefile.am (noinst_HEADERS): remove m4private.h.
	* src/Makefile.am (noinst_HEADERS): add m4private.h.
	* src/builtin.c: `#include "m4private.h"' now takes care of the
	above.  Duplicates removed.
	* src/debug.c: ditto.
	* src/eval.c: ditto.
	* src/evalmp.c: ditto.
	* src/format.c: ditto.
	* src/freeze.c: ditto.
	* src/input.c: ditto.
	* src/m4.c: ditto.
	* src/macro.c: ditto.
	* src/module.c: ditto.
	* src/numb.h: ditto.
	* src/output.c: ditto.
	* src/path.c: ditto.
	* stackovf.c: ditto.
	* symtab.c: ditto.

	* po/POTFILES.in: compensate for renaming of lib/*.
	* m4/Makefile.am (CLEANFILES): @EXEEXT@ left libtool wrapper behind.
	(INCLUDES): Look first in $(top_srcdir) (for eg. <m4/error.h>),
	and then in $(top_srcdir)/lib (for eg. "m4private.h").
	* src/Makefile.am (m4_LDADD): replace libi/libm4.la with
	m4/libm4.la.
	* m4/m4error.h:  Renamed error.h, for installation to
	$prefix/include/m4..
	* m4/m4obstack.h:  Renamed obstack.h, for same reason.
	* m4/m4regex.h: Renamed regex.h, for same reason.
	* m4/m4error.c:  Renamed error.c, and use #include "error.h".
	* m4/m4obstack.c: Renamed obstack.c, and fix #includes.
	* m4/m4regex.c: Renamed regex.c, and fix #includes.

	* lib: moved to m4 to easily support header installation to
	$prefix/include/m4.
	* Makefile.am (SUBDIRS): renamed lib dir to m4.
	* configure.in (AC_OUTPUT): reference m4/Makefile.in.
	* acm4/regex.m4: Point to m4/regex.c.

	* examples/foreach.m4:  Sanitise quoting.
	* examples/foreach.test:  New torture test.
	From Akim Demaille <akim@epita.fr>

2000-01-17  Gary V. Vaughan  <gary@gnu.org>

	* src/ltdl.c: Use access() to abort doomed module load attempts
	if module file does not exist.

	* src/Makefile.am (m4_SOURCES, EXTRA_SOURCES): getopt.o and
	getopt1.o will already be used if appropriate, so I moved getopt.c
	and getopt1.c from m4_SOURCES to EXTRA_SOURCES.

	* modules/modpath1.test: Use correct filename in header line.
	* modules/modpath2.test: ditto.
	* modules/modpath3.test: ditto.
	* modules/modpath4.test: ditto.

	Without these changes lt_dlopen("test") attempts to
	LoadLibrary("/bin/test") on Windows, which although harmless
	generates a spurious error message which spoils most of the tests:
	* modules/Makefile.am (EXTRA_DIST): s/test.m4 /modtest.m4 /
	(TESTS): s/test.test /modtest.test /
	(pkglibexec_LTLIBRARIES): s/test.la /modtest.la /
	(test_la_SOURCES, test_la_LDFLAGS): renamed to use modtest.
	* modules/modpath1.test: s/test.m4 /modtest.m4 /
	* modules/modpath2.test: ditto.
	* modules/modpath4.test: ditto.
	* modules/modpath3.test: s/-m test /-m modtest /
	* modules/shadow.m4: use {un,}loadmodule(`modtest').

2000-01-16  Gary V. Vaughan  <gary@gnu.org>

	* src/ltdl.c (find_file): Updated to new version with fixed memory
	allocation bug in `next'.
	* src/ltdl.h: updated to match.

	* modules/Makefile.am:  Cleaned up and reordered.

2000-01-16  René Seindal  <rene@seindal.dk>

	* modules/Makefile.am (TESTS): New tests for the module system.

	* modules/*.test: New files.

	* src/m4.c (main): Added call to module_init().
	Treats -M and -m as the arguments -D -U and -t, ie deferred.

	* src/m4.h: Added declaration of module_init().

	* src/module.c (module_init): No longer static

	* modules/Makefile.am ({test,shadow,time,stdlib}_la_LDFLAGS):
	Added to shut up automake about non standard libtool library
	names.

	* src/module.c: Disabled DEBUG by default.

	* modules/README: Changed example from unload.m4 to shadow.m4

	* modules/shadow.m4: Renamed from unload.m4

	* modules/Makefile.am (EXTRA_DIST): Removed unload.m4.

	* src/m4.c (main): Functionality for -m and -M were reversed.
	Fixed.

2000-01-12  Gary V. Vaughan  <gary@gnu.org>

	* doc/help2man.pl: updated to version 1.020.

	* lib/COPYING.LIB:  updated to version 2.1.

	* lib/m4module.h: restructure the M4_SCOPE code to work when
	creating a dll which links with libm4.la and both DLL_EXPORT
	(for the new dll) and LIBM4_DLL_IMPORT (for m4module.h) are
	both defined.

2000-01-11  Gary V. Vaughan  <gary@gnu.org>

	Merged the following changes from my tree:

	1999-06-15  Gary V. Vaughan  <gary@gnu.org>

	* configure.in (AC_LIBTOOL_WIN32_DLL): Declare that m4 has been
	ported to compile shared libs.

	* configure.in (LIBM4_DLL_IMPORT): Discover whether we need to
	use `__declspec(dllimport)' when linking libm4.la on win32.
	* src/Makefile.am (m4_LDFLAGS): Use dllimport if necessary.

	* configure.in (M4OBJS): Discover whether we need the shipped
	implementation of getopt_long.
	* src/Makefile.am (m4_LDADD): Link the getopt objects into the
	main binary here, as opposed to the module library in lib/libm4.la.

	1999-06-14  Gary V. Vaughan  <gary@gnu.org>

	* modules/README: Updated to describe the improved libltdl based
	module scheme.
	* README (cygwin): Added some compilation notes for building m4
	correctly under cygwin.
	* TODO: Cleaned out the entries for the module system since they
	are now implemented.

	* *.[ch]: __P is in the compiler's reserved namespace, so replaced
	all instances of __P with M4_PARAMS.

	* lib/getdate.h: removed unreferenced file.

	* lib/m4private.h: New file to define the private interface to the
	token_data struct, which must be shared between m4module.c, and
	builtin.c but not exported to modules built from the installed
	m4module.h since it's size changes depending on compile time
	options.

	* src/m4.h: Lots of stuff moved to lib/m4module.h.

	* lib/m4module.h: New file to define the interface available when
	compiling m4 modules.
	* lib/m4module.c: Moved parts of builtin.c, and m4.c which are
	necessary for module compilation into this new file.

	* lib/Makefile.am (include_HEADERS): install headers (renamed to
	avoid nameclash with other system headers) necessary for compiling
	modules.
	(libm4_la_SOURCES): always include error.c, obstack.c and regex.c
	so that modules can include the (renamed) installed headers and
	be guaranteed a matching implementation.
	* lib/m4error.h: renamed from error.h.
	* lib/m4obstack.h: renamed from obstack.h.
	* lib/m4regex.h: renamed from regex.h.
	* configure.in (AC_REPLACE_FUNCS):  Don't look for a system
	implementation, simply include the shipped version
	unconditionally, otherwise it is hard for a module to know
	whether the m4obstack.h header it is using matches the
	implementation it ends up linking against.
	(jm_WITH_REGEX):  Include regex into libm4 unconditionally for
	the same reason.

	1999-05-18  Gary V. Vaughan  <gary@gnu.org>

	* examples/misc.test: Don't run this test on machines which don't
	have a root user in /etc/passwd (e.g. cygwin).

	* tests/get-them (/^@example$/): Error messages might have a
	``.exe'' suffix to the program name, or else use the libtool
	``.libs/lt-m4'' binary, or generally have an unexpected path.  All
	of these cases are now catered for when comparing error messages
	in generated tests.
	* tests/other-tests/*.test: ditto.
	* examples/*.test: ditto.

	* tests/defs (M4): use libtool execute mode.
	* examples/defs (M4): ditto.

	* tests/get-them (END): explicitly close any open file.
	(printthem): In a regular expression, '{' is the start of a repeat
	count!  Use `[{]' for a literal open brace.
	(/^@node /): Don't use substr on a string shorter than the trim
	length.

	1999-05-17  Gary V. Vaughan  <gary@gnu.org>

	* configure.in (LTLIBOBJS): calculated from LIBOBJS, and
	substituted.
	(AC_LIBTOOL_DLOPEN): declare that this package will use dlopen.

2000-01-10  Andreas Schwab  <schwab@suse.de>

	* tests/other-tests/gmp.test: Find config.sh in build directory.

	* configure.in: Find tests/mkconfig.sh in $srcdir.

	* configure.in: Define HAVE_SIGINFO_T if siginfo_t is defined in
	<signal.h> (for SUS2 compliant systems).

	* src/stackovf.c: Check for HAVE_SIGINFO_T in addition to
	HAVE_SIGINFO_H.

2000-01-10  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4o.

	* TODO, NEWS: Cleaned up and updated.

	* src/m4.c (main): New variable exit_status for exit status in
	case of unreadable files.  Now m4 will exit with EXIT_FAILURE if a
	file cannot be read instead of EXIT_SUCCESS.

	* src/builtin.c (m4_indir): Changed error message to help
	translators (from Akim Demaille <demaille@inf.enst.fr>).

	* lib/obstack.[hc], getopt*.[ch]: Updated to newest version from
	Cygnus.

	* lib/error.[hc], lib/regex.[hc], lib/strtol.c: Updated to version
	from glic 2.1.2.

	* src/input.c (match_input): Reordering of code, to avoid multiple
	calls to push_string_init() from obstack_grow(), which can happen
	with some compilers (found and fixed by James Bonfield
	<jkb@mrc-lmb.cam.ac.uk>).

	* src/stackovf.c: Added prototypes for ultrix.
	(setup_stackovf_trap): Added __P to cast.
	(Both reported by John David Anglin <dave@hiauly1.hia.nrc.ca>)

2000-01-09  René Seindal  <rene@seindal.dk>

	* doc/m4.texinfo (Changequote): Added comment about changing
	quotes when the old quote is a part of the new.

	* src/builtin.c (expand_ranges): Added break after trailing dash.
	This caused misbehavious on some systems (found and fixed by Akim
	Demaille <demaille@inf.enst.fr>).

	* AUTHORS: Thomas Tanner included

	* acconfig.h: Added entry for ss_sp (see below).

	* configure.in (use_stackovf): Added check for stack_t with member
	ss_base instead of ss_sp (BSDI notably).  (Reported by Paul Eggert
	<eggert@twinsun.com>).

	* doc/m4.texinfo (Frozen files): Added a simpler example for
	generating frozen files from several input files.

1999-11-14  Paul Eggert  <eggert@twinsun.com>

	* po/POTFILES.in: Add lib/getopt.c, lib/obstack.c,
	lib/regex.c, lib/xmalloc.c.

1999-11-10  René Seindal  <rene@seindal.dk>

	* Makefile.am (ACLOCAL_AMFLAGS): Passes -I acm4 to aclocal.

	* src/module.c: reindented.
	(module_load): return if this is a repeated load of same module.
	(module_init): slight change of logic to avoid repeated
	initialisation debug messages.

	* Makefile.am (DIST_SUBDIRS): Added to ensure modules/ is included
	in the distribution.

	* modules/Makefile.am (test_la_LDFLAGS): set to -module to silence
	automake warnings about missing lib prefix.
	(time_la_LDFLAGS): ditto
	(stdlib_la_LDFLAGS): ditto

1999-11-10  Paul Eggert  <eggert@twinsun.com>

	* src/m4.h: Include error.h, since our macros use error.
	* src/m4.c: Don't need to include error.h.

1999-11-09  Paul Eggert  <eggert@twinsun.com>

	* src/m4.h (voidstar): Define to void * if __STDC__ is defined
	and zero, as Solaris 7 cc does.
	(bcopy): Remove macro; no longer needed with new obstack.h.

	* src/output.c (freeze_diversions): Don't assume that a
	diversion size can fit in `int'.  Check for diversion file
	size too large to be printed with `unsigned long'.

	* src/Makefile.am (CFLAGS): Omit -Wall.

	* src/stackovf.c (setup_stackovf_trap): Remove cast to unsigned.

	* src/debug.c (trace_format):
	Use ANSI C if (defined __STDC__ && __STDC__) || defined PROTOTYPES.

	* src/freeze.c (produce_frozen_state):
	Don't assume string lengths fit in int.

1999-10-13  René Seindal  <rene@seindal.dk>

	* po/cs.po: Czech translation added.

	* po/sv.po: Updated Swedish translation.

	* po/ru.po: Updated Russian translation.

	* po/pl.po: Updated Polish translation.

	* po/el.po: Greek translation added.

1999-10-13  René Seindal  <rene@seindal.dk>

	* configure.in (ALL_LINGUAS): Added Greek translation (el).
	(ALL_LINGUAS): Added Czech translation (cs).

1999-03-30  Gary V. Vaughan  <gary@gnu.org>

	* src/builtin.c: moved module loading functions into...
	* src/module.c: entirely new implementation using libltdl.
	* po/POTFILES.in: added src/module.c.
	* modules/Makefile.am (LTLIBRARIES): Removed lib prefix as these
	are modules, not linktime libraries.
	(LDFLAGS): added -no-undefined -module and -avoid-version flags.
	* modules/stdlib.c (m4_macro_table): use <name>_LTX collision
	avoidance on exported symbols.
	* modules/test.c (m4_macro_table, m4_init_module,
	m4_finish_module): ditto.
	* modules/time.c (m4_macro_table): ditto.

	* modules/time2.m4: new file which requires command line loading
	of modules.
	* src/m4.c (--load-module): dynamically load named runtime module
	into running executable before reading the source.
	(--module-directory): prepend a directory to the module search
	path.
	(module_init()): Do this the first time we load a module instead;
	if the module subsystem is broken normal m4 scripts can still run.
	* src/m4.h (install_builtin_table): is now exported.

1999-03-26  Gary V. Vaughan  <gary@gnu.org>

	* src/module.c: removed.  No longer required.
	* po/POTFILES.in: removed src/module.c.

	* Makefile.am (MAINTAINERCLEANFILES): Remove all the files that
	the bootstrap script can recreate.
	* acm4/Makefile.am (MAINTAINERCLEANFILES): ditto.
	* doc/Makefile.am (MAINTAINERCLEANFILES): ditto.
	* examples/Makefile.am (MAINTAINERCLEANFILES): ditto.
	* lib/Makefile.am (MAINTAINERCLEANFILES): ditto.
	(AUTOMAKE_OPTIONS): reduced strictness to allow COPYING.LIB.
	* modules/Makefile.am (MAINTAINERCLEANFILES): ditto.
	* src/Makefile.am (MAINTAINERCLEANFILES): ditto.
	* tests/Makefile.am (MAINTAINERCLEANFILES): ditto.

	* acinclude.m4: removed.  `aclocal -I acm4' handles this much
	better.
	* acm4/Makefile.am (ACINCLUDE_M4): ditto.
	* acm4/gettext.m4: removed.  It causes a multiple definition vs.
	the installed gettext.m4 file when running aclocal.

1999-03-25  Gary V. Vaughan  <gary@gnu.org>

	* configure.in (AM_INIT_AUTOMAKE): bumped version number to
	distinguish this from the last prerelease.
	(AC_LIBLTDL_CONVENIENCE):  build libltdl as a convenience library
	in its own subdirectory.

	* modules/Makefile.am (*_SOURCES): renamed to use libtool's "no
	lib prefix on a module" feature.
	(LDFLAGS): Added `-module -avoid-version' flags to build
	versionless module libraries.
	* src/builtin.c (m4_load_module): use libltdl.
	(module_unload_all): use libltdl.
	* src/m4.c (module_init): initialise module loading on demand for
	better diagnostics, and so that m4 will still work even if
	the module code is broken.
	* src/m4.h (module_init): removed.  No longer relevant.
	* modules/stdlib.c (m4_macro_table): use stdlib_LTX_ prefix on
	exported symbols for compatibility with dlpreopening.
	* modules/test.c (m4_macro_table, m4_init_module,
	m4_finish_module): ditto.
	* modules/time.c (m4_macro_table): ditto.

	* bootstrap: New file.  Runs all the autoutils in the right order
	after a fresh checkout, or a make maintainer-clean.

1999-02-18  Akim Demaille  <demaille@inf.enst.fr>

	* src/builtin.c (dump_symbols): New function, factoring common
	content of m4_dumpdef and m4_symbols.
	(m4_dumpdef): Use it.
	(m4_symbols): New function, implementing `symbols'.  Use it.
	* doc/m4.texinfo: Fixed missing commas after @xref, so that the
	file compile with modern makeinfo.
	(Symbols): New node, documenting symbols.
	(direntry): Modernize.

1998-12-11  René Seindal  <rene@seindal.dk>

	* src/builtin.c (predefined_tab): New predefined macros
	__m4_changeword__, __m4_gmp__ and __m4_modules__ for testing for
	configure time options.

1998-12-01  Andreas Schwab  <schwab@issan.cs.uni-dortmund.de>

	* src/module.c (module_try_load): Don't try to be clever and
	overwrite argument string.  Instead allocate all constructed
	strings locally, since they can have arbitrary lengths.  Make
	arguments pointers to const.
	(module_search): Simplify due to above change.

1998-11-29  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4n.

	* tests/Makefile.am (OTHER_TESTS, OTHER_FILES): New tests.

	* tests/other-tests/import-environment.{m4,test}: New test.

	* tests/other-tests/discard-comments.{m4,test}: New test.

	* doc/m4.texinfo (Invoking m4): Updated for --discard-comments.

	* src/m4.c (main): New option -c --discard-comments.
	New global variable discard_comments.

	* src/m4.h (token_type): New TOKEN_NONE for tokens to be
	discarded, ie never returned from next_token().
	Added declaration of discard_comments.

	* src/input.c (next_token): Now loops until token type is not
	TOKEN_NONE.  Comments are now given this type when comments should
	be discarded.

	* doc/m4.texinfo (Invoking m4): Updated for --import-environment
	and mpeval.

1998-11-28  René Seindal  <rene@seindal.dk>

	* src/m4.c (main): New option --import-environment (no single
	letter option).

	* When configured with --with-gmp both the normal (fast) eval()
	and the gmp aware mpeval() are defined.  To restore previous
	bahaviour use "define(`eval', defn(`mpeval'))".

	* tests/other-tests/gmp.m4: Changed to use mpeval().

	* src/evalmp.c: New file for compiling eval.c as gmp aware.
	Just defines USE_GMP if WITH_GMP is defined and includes eval.c.

	* src/eval.c: Now includes "numb.c" directly.  Everything in this
	file must by static, except evaluate(), which is changed to
	mp_evaluate() if USE_GMP in force.

	* src/numb.c: Changed to be included by eval.c instead of being
	compiled separately.  Everything is declared static.

	* src/numb.h: Removed declarations of functions, as numb.c is now
	included by eval.c.

	* src/builtin.c: Declaration of m4_mpeval() added.
	Inserted `mpeval' in builtin table.
	(do_eval): New function with common code for m4_eval and m4_mpeval.
	(m4_mpeval): New function for gmp version of eval.

	* src/m4.h: Declaration of mp_evaluate().

	* src/Makefile.am (m4_SOUCES): Includes mpeval.c.
	(EXTRA_m4_SOURCES): Now has numb.c and numb.h

	* src/m4.c (main): m4 --version also shows which options were used
	for compilation, such as: "GNU m4 1.4n (options: modules gmp)"

1998-11-27  René Seindal  <rene@seindal.dk>

	* Error messages now always print program name before input file
	name as specified by GNU coding standards.  Reported by Akim
	Demaille <demaille@inf.enst.fr>.

	* doc/m4.texinfo (Include): Change due to changed error message
	format.
	(Eval): Do.

	* tests/get-them: Minor change to sed script due to changed error
	message format.

	* src/m4.c (print_program_name): New func used to print program
	name, input file and line number in error ().  Used as an
	error_print_progname handler.
	(reference_error): Removed.
	(main): Assigns error_print_progname.

	* src/m4.h (M4ERROR): Removed reference_error ().

1998-11-25  René Seindal  <rene@seindal.dk>

	* Updated to libtool 1.2b.

	* src/builtin.c (install_builtin_table): Added braces to avoid
	warning of ambiguous 'else'.

	* src/module.c: Inserted search path code from path.c modified to
	use new interface.
	(module_init): Configured default path used only if M4MODPATH is
	not set.
	(module_try_load): Now reads libMODULE.la as generated by libtool
	for actual module name.
	(module_load): Gives better error messages on failure.

	* src/m4.h: Added declarations of structures and functions for
	generic search path handling.

	* src/path.c: Removed all module specific code and introduced new
	functions of more generic search path handling.

1998-11-24  René Seindal  <rene@seindal.dk>

	* configure.in: Defines INTLINCL to -I$(top_srcdir)/intl if using
	included gettext, as <libintl.h> might not be found
	otherwise. Reported by Andrew Bettison <andrewb@zip.com.au>.

1998-11-22  René Seindal  <rene@seindal.dk>

	* src/output.c (insert_diversion): Fixed bug that might cause m4
	to read from standard output!  Triggered by input
	'divert(1)undivert(0)'.  Test for divnum>0 changed to divnum>=0,
	so now 'undivert(0)' does nothing.

1998-11-18  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4m.

	* src/input.c (set_word_regexp): Fixed a bug, where word_regexp
	could be changed when compiling a illegal regexp, causing later
	use of the regexp to dump core.

	* src/module.c (module_load): Changed error message to conform to
	standards.

	* src/m4.c (usage): Added message about reporting bugs.

	* doc/m4.texinfo (Changeword): Corrected a wrong example.
	(Changeword): Added note about the type of regexps used.

	* ltconfig, ltmain.sh: New files from Libtool 1.2.

	* configure.in: Added calls to AM_ENABLE_SHARED, AM_DISABLE_STATIC
	and AM_PROG_LIBTOOL.

	* acm4/modules.m4 (AM_WITH_MODULES): Redone completely to work
	with libtool.

	* modules/Makefile.am: Changed completely to compile modules using
	libtool.  The modules are compiled as shared libraries, and are
	renamed when installed.

	* src/m4.h, src/module.c, acm4/modules.m4, acconfig.h: Renamed
	USE_SHL_LOAD to HAVE_SHL_LOAD

	* src/builtin.c (shipout_string): Now tests for a NULL string.

	* src/module.c: New level of indirection around non-portable
	functions to load shared objects.  Intended to encapsulate the non
	portable parts better and to reduce the number of #ifdefs in the
	code.

	* Makefile.am (DIST_SUBDIRS): Instead of EXTRA_DIST for added
	directory modules/ to the distribution.

1998-11-15  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4l.

	* modules/stdlib.c: New module `stdlib' defining some standard
	functions: getcwd, getlogin, getpid, getppid, getuid, getpwnam,
	getpwuid, hostname, rand, srand, getenv, setenv, unsetenv, uname.

	* src/builtin.c (shipout_string): New convenience function for
	builtins and modules.

	* src/module.c (module_load): Tentative support for
	shl_load/shl_findsym, but I cannot test it.  Copied from MetaHTML.

	* Makefile.am (SUBDIRS): Directory modules added if configured.

	* modules/Makefile.am: Now correctly compiles and installs
	modules in pkglibexecdir.

	* src/m4.h: WITH_MODULES defined iff HAVE_DLOPEN or USE_SHL_LOAD.
	These two are now initialised by autoconf macros.

	* src/path.c (module_env_init): MODULE_PATH is always on the
	search path.

	* src/Makefile.am: Now generated pathconf.h which defined the
	default MODULE_PATH.

	* configure.in (pkglibexecdir): Added defintion of pkglibexecdir,
	where modules are installed.

	* acm4/modules.m4: Enhanced with code from MetaHTML, contributed
	by Brian J. Fox <bfox@datawave.net>.  This change allow modules to
	build and install automatically, and it is prepared for other
	interfacec than dlopen().

	* src/builtin.c (predefined_tab): Added __m4_version__ for the
	current version of GNU m4.  It is a GNU extension.

1998-11-14  René Seindal  <rene@seindal.dk>

	* tests/Makefile.am (GENERATED_TESTS): Added new
	generated-tests/changesy.8.test

	* doc/m4.texinfo (Changesyntax): Documentation for escape
	syntax class.

	* src/macro.c (expand_token): Check for escaped macro call before
	symbol table lookup.

	* src/builtin.c (m4_changesyntax): Added `@' flag to define escape
	characters

	* src/input.c: New static variable use_macro_escape, which is TRUE
	iff some character has code SYNTAX_ESCAPE
	(input_init): Added initialisation of use_macro_escape.
	(check_use_macro_escape): New function to synchronise
	use_macro_escape with the syntax table.
	(set_quotes): Added call to check_use_macro_escape()
	(set_comment): Do.
	(set_syntax): Do.
	(next_token): Added new case for IS_ESCAPE.

	* src/m4.h (SYNTAX_ESCAPE): Defined as simple syntax category.

1998-10-13  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4k.

	* tests/Makefile.am (GENERATED_TESTS): Renamed gentest to
	generated-tests.

	* tests/Makefile.am (OTHER_TESTS, OTHER_FILES): Added manually
	maintained tests in tests/other-tests.  These currently tests for
	8-bit transparency, multiple precision arithmetic and sync-line
	output.  Test for stackoverflow detection does not work.

	* examples/Makefile.am (TESTS): Added tests for all example files.

	* examples/mktests.sh: New file.  Help program for creating test
	files.

	* tests/mkconfig.sh: New file to generate tests/config.m4 and
	tests/config.sh.  This is for tests of configure selectable
	features.  Picks up all set WITH_ and ENABLE_ veriables from
	config.h

	* src/path.c (path_search): Added argument 'char **expanded_name'
	to return the expanded name.

	* src/m4.h: Added 2nd argument to declaration of path_search().

	* src/m4.c (main): Added 2nd argument to path_search().

	* src/freeze.c (reload_frozen_state): Do.

	* src/builtin.c (m4_undivert): Do.
	(include): Do.

1998-10-11  René Seindal  <rene@seindal.dk>

	* acm4/Makefile.am (ACINCLUDES_M4): Added gmp.m4 and modules.m4

	* acm4/modules.m4: New file.  Defines AM_WITH_MODULES.

	* acm4/gmp.m4: New file.  Defines AM_WITH_GMP.

	* configure.in: Introduced AM_WITH_MODULES and AM_WITH_GMP.

	* AUTHORS, ChangeLog: Changed all dates to ISO 8601.

	* intl/: Updated to GNU gettext 0.10.35.

	* doc/m4.texinfo (Format): Documented that format is blind.

	* src/builtin.c (builtin_tab): Builtin format marked as blind.

1998-10-07  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4j.

	* tests/Makefile.am (GENERATED_TESTS): Changed .m4 extension to
	.test, as the files are no longer just m4 input.

	* tests/get-them (FILE): Changed .m4 extension to .test.

	* src/m4.h (token_type): New token type TOKEN_SPACE introduced.
	Otherwise quoted strings with leading whitespace first in a macro
	argument would be eliminated.

	* src/macro.c (expand_token): Handles new token type TOKEN_SPACE.
	(expand_argument): Do.

	* src/input.c (next_token): SPACE and NUM/OTHER characters are only
	grouped together iff both quote and comment strings are single
	character.  Otherwise they might include a comment/quote leader.
	(next_token): Returns new token type TOKEN_SPACE.

	* src/builtin.c (push_builtin_table): New function to push a
	builtin_table on the stack without installing its contents.
	(find_builtin_by_name): Added call to push_builtin_table() if
	reading frozen files.  Otherwise the builtins named in the frozen
	files could not be found.
	(install_builtin_table): Changed to use push_builtin_table()

1998-10-04  René Seindal  <rene@seindal.dk>

	* po/pl.po: Polish translation added.

	* po/POTFILES.in: src/module.c added.

1998-10-04  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4i.

	* configure.in (ALL_LINGUAS): Added Polish pl.po

1998-10-03  René Seindal  <rene@seindal.dk>

	* Many files: Incorporated changes to implement dynamic modules.
	Detailed comments in src/modules.c and modules/README

	* src/module.c: New file, implements the OS dependant parts of
	dynamic module loading.

	* src/Makefile.am (m4_SOURCES): Added module.c

	* src/builtin.h: New file, declares some functions from builtin.c
	that are of use for other modules (shipout_int, numeric_arg,
	skip_space, bad_argc), and the macros ARG() and DECLARE().

	* src/builtin.c (install_builtin_table): New function.  Each
	module brings in a builtin_table, which is pushed on a stack.
	(struct builtin_table): New struct for list of builtin_tables.
	(m4_loadmodule): New function to implement builtin "loadmodule".
	(shipout_int): No longer static, to be used by modules.
	(numeric_arg): do.
	(skip_space): do.
	(bad_argc): do.
	(builtin_init): changed to call install_builtin_table()
	(find_builtin_by_name): Now searches all builtin_tables
	(find_builtin_by_addr): do.

	* src/path.c: Reorganised to allow for two search paths, one for
	include files and one for modules.

	* src/m4.h: Added declarations for new functions in module.c and
	in path.c.

	* src/m4.c (main): Added call to module_init().

	* modules: New directory with a few demo modules.

	* Makefile.am (EXTRA_DIST): Added modules/* since modules/ is not
	in SUBDIRS.

	* configure.in: Added modules/Makefile to AC_OUTPUT.

	* configure.in: Added code to implement --with-modules.  Tests for
	<dlfcn.h> and -ldl.

	* acconfig.h: Added WITH_MODULES

1998-10-02  René Seindal  <rene@seindal.dk>

	* examples/Makefile.am (pkgdata_DATA): Removed special target for
	check and variables TESTS.  These tests are now run from the
	tests/ directory.

	* tests/Makefile.am (OTHER_TESTS): Added tests from the example/
	directory.  The files stay there but the tests are run from the
	tests/ directory.

	* tests/Makefile.am (EXTRA_DIST): Added run-test.

	* tests/run-test: New file.  Run a test manually

	* tests/Makefile.am, tests/get_them: Moved automatically generated
	tests (from the manual) to sub directory tests/gentest/.  The
	tests/ directory had gotten a bit messy.

1998-09-06  Erick Branderhorst  <Erick.Branderhorst@asml.nl>

	* examples/{comments,ddivert,debug,iso8859,reverse,sysv-args,\
	wrap}.test: Added a few testcases.

1998-08-21  Erick Branderhorst  <Erick.Branderhorst@asml.nl>

	* Prerelease 1.4h.

	* lib/Makefile.am (noinst_HEADERS): regex.h added

	* configure.in (jm_WITH_REGEX, jm_PREREQ_ERROR):
	acm4/{error,regex}.m4 (from fileutils-3.16u.tar.gz).

	* acm4/Makefile.am: created providing rules to create
	$(top_srcdir)/acinclude.m4 to be used by aclocal.

	* tests/defs (LANGUAGE, LC_ALL, LANG): force them to be
	`C'. Reported by Ulrich Drepper.

	* Makefile.am (SUBDIRS): Removed checks directory
	* configure.in (AC_OUTPUT): Removed checks/Makefile

	* doc/m4.texinfo (Patsubst,example): @comment added to preserve
	the space when m4.texinfo is edited and whitespace.el is active.
	(Defn,example): idem.

1998-08-20  Erick Branderhorst  <Erick.Branderhorst@asml.nl>

	* doc/m4.texinfo (Esyscmd): grep ../Makefile instead of
	../COPYING. ../Makefile is a file which is certainly present when
	test is executed in testSubDir. One can't be sure that the COPYING
	file is in .. or ../.. in all situations, the ../Makefile is
	always there.

	* doc/m4.texinfo (Include): adjusted expected test output
	according to new tests, i.e. the input will always come from the
	file `in' created by the test.

	* tests/Makefile.am: Added three lines at the top to get
	esyscmd.1.test working.

	* tests/get-them: modified to generate clearer tests who will need
	less maintenance when new test examples are created in
	`doc/m4.texinfo'. All tests are small (nearly stand-alone, they
	need the generic file `defs') shell scripts creating `in', `ok',
	`out' and when apropriate `okerr' and `err' in the directory
	`testSubDir' when executed. The compare of `ok' and `out'
	(and of `okerr' and `err') will be the exit status of the test.
	`out' must match `ok' (and `okerr' must match `err') for the test
	to be succesful.

	* tests/[a-b]\{1,8\}.[0-9]+.test: This namespace is reserved for
	the tests generated by tests/get-them getting it input normally
	from doc/m4.texinfo. The namespace tests/[a-b]+[0-9]+.test (no `.'
	(dot) before the numeric part) is reserved for all other (hand
	written) tests. The `+' means one or more times.

1998-08-12  Erick Branderhorst  <Erick.Branderhorst@asml.nl>

	* doc/Makefile.am (EXTRA_DIST): helptoman.pl and $(MANS) to
	supported short man page to refer to info documentation
	* helptoman.pl: added
	* configure.in: AC_PATH_PROG(PERL,perl)
	* Makefile.am (SUBDIRS): doc after src

	* libitized with libit 0.5 from
	ftp://ftp.iro.umontreal.ca/pub/contrib/pinard/maintenance/libit.

	* configure.in (AC_REPLACE_FUNCS): added xmalloc xstrdup
	* lib/Makefile.am (libm4_a_SOURCES): removed automakely supported
	 replacement functions, (libm4_a_LIBADD): @LIBOBJS@
	* configure.in (AM_WITH_REGEX), acconfig.h (WITH_REGEX): added
	  lib/rx.{c,h}: added
	* configure.in (AC_CHECK_FUNC): getopt_long

	* src/m4.c (usage): Report bugs to m4-bugs@gnu.org.

	* TODO: added entry about dependencies

1998-08-10  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4f

	* doc/m4.texinfo (Changesyntax): Added documentation for the macro
	"changesyntax".

	* src/builtin.c (m4_changesyntax): Added builtin macro
	"changesyntax" to modify the syntax table.

	* src/input.c, src/m4.h, src/macro.c: Implemented an input syntax
	table.  All categories are assigned a syntax code and tokens are
	read according to this table.

1998-08-09  René Seindal  <rene@seindal.dk>

	* src/numb.{c,h}: New files, implements multiple precision eval
	using GNU gmp.  Originally submitted by John Gerard Makecki
	(johnm@vlibs.com), later modified.  Tested with GNU gmp 2.0.2.

	* doc/m4.texinfo (Eval): Added documentation for multiple
	precision arithmetic library support.

	* src/m4.{c,h}, src/eval.c, src/builtin.c, configure.in: Changes
	to accommodate multiple precision eval.

1998-08-07  René Seindal  <rene@seindal.dk>

	* src/input.c (MATCH, match_input), src/m4.h: changed definition
	of comment and quote strings to `unsigned int' to allow eight bit
	chars (reported by andrewb@zip.com.au (Andrew Bettison)).

	* src/builtin.c, doc/m4.texinfo: Builtin `syncoutput' added by
	patch from Mike Howard <mike@clove.com>

1998-08-06  René Seindal  <rene@seindal.dk>

	* gettext.m4: corrected AM_WITH_NLS to handle use of installed
	-lintl.

1998-08-03  René Seindal  <rene@seindal.dk>

	* Prerelease 1.4e

	* src/m4.h: Added ifdef ENABLE_NLS around include of <libintl.h>
	and _ macro.  M4 now builds with --disable-nls.

	* src/m4.c (main): reintroduced textdomain(PACKAGE) to get gettext
	to look for right message catalogs.  Call indef'ed by ENABLE_NLS.

	* configure.in (ALL_LINGUAS): Added complete list of translations:
	de fr it ja nl ru sv.

1998-05-23  Erick Branderhorst  <Erick.Branderhorst@asml.nl>

	* po/nl.po: Dutch translation by Erick Branderhorst.

	* po/fr.po: French translation by Erick Branderhorst, based on the
	translations by François Pinard in fr.msg and m4.cod.

1998-05-22  Erick Branderhorst  <Erick.Branderhorst@asml.nl>

	* Prerelease 1.4d.

	* src/m4.c: #include <signal.h> not <sys/signal.h>.

	* src/Makefile.am: CFLAGS = -Wall @CFLAGS@.

	* checks/Makefile.am: explicit list tests in CHECKS.

	* configure.in, {,src,doc,lib,examples,checks}/Makefile.am,
	src/{ansi2knr.{1,c}} doc/{m4.texinfo,mdate-sh}, missing,
	mkinstalldirs, install-sh: Added automake (1.3) support.

	* lib/{alloca.c,error.{c,h},get{date.h,opt.{c,h},opt1.c},
	obstack.{c,h},regex.{c,h},strtol.c,xmalloc.c,xstrdup.c}:
	Used libitize (0.4) to update.

	* configure.in, ABOUT-NLS, intl/*, po/*: Added gettextize
	(0.10.25) support. Removed LOCALE, fr.msg, m4.cod and adjusted
	README accordingly.

	* src/stackovf.c: #ifdef USE_STACKOVF ... #endif to (de-)activate
	stack overflow functionality.

1994-12-03  François Pinard  <pinard@iro.umontreal.ca>

	* Prerelease 1.4.1.

	* Makefile.in (realclean-local): Delete stamp-h.in.

	* configure.in, {,src,lib}/Makefile.in, src/m4.h, src/m4.c:
	Localize, adapting from how it is done in sharutils.

	* fr.tt: New file, for French.

	* configure.in, {,*/}Makefile.in, acconfig.h, src/m4.c,
	src/freeze.c: Rename PRODUCT to PACKAGE.

1994-11-26  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Check for <libintl.h> and <locale.h>.
	* src/m4.h, src/builtin.c, src/debug.c, src/eval.c, src/macro.c,
	src/stackovf.c: Rename _ to __P.
	* src/m4.h: Declare _ as a macro returning its argument, or else,
	include <libintl.h> and declare _ as gettext.
	* src/m4.c: Possibly include <locale.h> and call setlocale.
	* src/m4.c, src/builtin.c, src/debug.c, src/eval.c, src/freeze.c,
	src/input.c, src/macro.c, src/output.c, src/path.c,
	src/stackovf.c, src/symtab.c: Use _ macro over all localizable
	strings.

1994-11-07  François Pinard  <pinard@iro.umontreal.ca>

	* doc/Makefile.in (stamp-vti): Use new -r option to date.

	* configure.in: Put --with-gmp in place, in prevision for John
	Gerard's work.
	* acconfig.h: Document WITH_GMP.

1994-11-05  François Pinard  <pinard@iro.umontreal.ca>

	* Release 1.4.

	* doc/Makefile.in (realclean): Also remove stamp-vti.
	Reported by Eric Backus.

1994-11-02  François Pinard  <pinard@iro.umontreal.ca>

	* src/freeze.c (produce_frozen_state): If the frozen file cannot
	be opened, return immediately after producing the error message.
	Reported by Andreas Schwab.

	* configure.in: Check for const only after having found possible
	ANSIfying compiler flags, this is of no use to check it before.
	Reported by Alexander Lehmann.

1994-11-01  François Pinard  <pinard@iro.umontreal.ca>

	* src/macro.c (collect_arguments): Cast obstack arguments to
	(voidstar), so avoiding compiler warnings.
	Reported by Joseph E. Sacco.

	* src/freeze.c (produce_frozen_state): Cast printed lengths to
	(int) so they correspond to %d format items.
	Reported by Joseph E. Sacco.

	* src/m4.c (main): Cast the argument to xfree to (voidstar).
	* src/symtab.c (free_symbol): Idem.
	Reported by Karl Vogel.

1994-10-31  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (DISTFILES): Distribute BACKLOG.

	* configure.in: Define PRODUCT and VERSION.
	* acconfig.h: Document PRODUCT and VERSION.
	* src/m4.c, src/freeze.c: Use PRODUCT and VERSION instead of the
	constant string m4 and variable or parameter named version.

1994-10-30  François Pinard  <pinard@iro.umontreal.ca>

	* src/m4.h, src/debug.c: Replace all #ifdef __STDC__ by #if
	__STDC__.  Alliant FX/2800 Concentrix 2.2 (i860-BSD4.3) compiler
	defines __STDC__ to 0, for indicating it is *not* ANSI!
	Reported by Kaveh R. Ghazi.

	* configure.in: Added obsolescent tests for AIX and Minix.

	* doc/Makefile.in (mostlyclean): Remove texclean in dependencies,
	which texclean does not exist anymore.
	Reported by Eric Backus, Jim Meyering, John David Anglin and
	Joseph E. Sacco.

1994-10-29  François Pinard  <pinard@iro.umontreal.ca>

	* aclocal.m4 (fp_C_PROTOTYPES): Force -D_HPUX_SOURCE with -Aa.
	Reported by John David Anglin.

	* src/ansi2knr.c: New version, sent by Peter Deutsch.
	* aclocal.m4 (fp_C_PROTOTYPES): Substitute empty or ansi2knr for
	ANSI2KNR, depending on the fact the compiler is ANSI or not.
	* src/Makefile.in: Use -Ovarargs=convert on ansi2knr calls.
	Remove the sed filter after ansi2knr for debug.c.  Use $O instead
	of $U, put underline in extensions rather than in basenames.  Use
	implicit rules, now that regularity makes this possible.
	Have $(OBJECTS) depend on $(ANSI2KNR), so to trigger compilation
	of ansi2knr whenever it is needed.
	* configure.in: Adjusted for correct STACKOVF substitution.
	* src/debug.c (trace_format): When not __STDC__, use (...) as a
	parameter list, so ansi2knr will convert it to (va_alist) va_dcl.
	Reported by David MacKenzie.

	* Makefile.in: Remove binprefix.  Use transform_name instead.
	Reported by David MacKenzie.

	* doc/Makefile.in: Create version.texi, use it, clean it.
	Reported by Jim Meyering.

1994-10-28  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (all, install, uninstall): Depend on Makefile.

	* Makefile.in: For actions invoking $(MAKE) from within compound
	sh statements, exit non-zero if the sub-make fails.  Otherwise,
	the top-level make may exit successfully when it should fail.
	Reported by Jim Kingdon.

	* {,/*}Makefile.in: Use && after all cd, in case they fail.

	* {,*/}Makefile.in: Declare PRODUCT and VERSION macros.
	(dist): Use PRODUCT and VERSION instead of tricks on .fname.
	* configure.in: Substitute PRODUCT and VERSION.

	* {,*/}Makefile.in (dist): Always try a hard link before a copy.

1994-10-27  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (mostlyclean-local): Do not remove *~.
	* */Makefile.in (mostlyclean): Idem.
	Reported by Robert E. Brown and Richard Stallman.

1994-10-09  François Pinard  <pinard@iro.umontreal.ca>

	* src/m4.h: Get rid of CONFIG_BROKETS.

1994-10-02  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Use AC_ARG_PROGRAM.
	* aclocal.m4 (fp_C_PROTOTYPES): Substitute @kr@ by kr or empty.
	Reported by David MacKenzie.

1994-10-01  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Do not add -O to CFLAGS for GNU C, now that
	configure does it automatically.
	Reported by Jim Meyering.

1994-09-23  François Pinard  <pinard@iro.umontreal.ca>

	* src/stackovf.c: Declare the handler_t typedef earlier in the
	code, use it for stackovf_handler.
	(setup_stackovf_trap): Use RETSIGTYPE instead of void while
	casting sigsegv_handler.
	Reported by Robert Bernstein.

	* src/m4.c (main): Initialize program_name to argv[0] without
	basename'ing it.
	Reported by Karl Berry.

1994-09-18  François Pinard  <pinard@iro.umontreal.ca>

	* src/Makefile.in (TAGS): Include a ../lib/TAGS reference.
	Reported by Karl Berry.

1994-09-14  François Pinard  <pinard@iro.umontreal.ca>

	* lib/Makefile.in (mostlyclean): Added.
	(TAGS): Make in $(srcdir).

	* configure.in: Use `choke me' in test, like everywhere!

	* {doc,examples,lib,src}/Makefile.in (check): Deleted, as
	unreacheable and useless.

	* doc/Makefile.in (texclean): Deleted, merged in mostlyclean.

	* lib/Makefile.in (DISTFILES): Distribute TAGS.
	(distclean): Do not remove TAGS.
	(realclean): Remove it.
	* Makefile.in: Make TAGS in lib also, not just in src.
	Reported by Karl Berry.

	* Makefile.in (distclean, realclean): Instead of recursively
	calling $(MAKE) for the -local part, allow parallel execution of
	-recursive and -local, only delay the removal of config.status,
	which is repeated in both goals.

1994-09-13  François Pinard  <pinard@iro.umontreal.ca>

	* Release 1.3.

	* Makefile.in: Group all *clean-recursive goals in one, using sed
	to remove `-recursive' while calling make recursively.  Also, use
	a subshell for each recursive $(MAKE).
	Reported by Jim Meyering.

	* src/m4.h (memcpy): Define with bcopy for BSD systems.
	Reported by Kaveh R. Ghazi.

	* src/Makefile.in (ansi2knr): Use $(LIBS) while linking, for SunOS
	4.1.3 requires -ldl to link even ansik2nr, and we need a way to
	specify it.

	* configure.in: Use date instead of touch for stamp-h.
	* Makefile.in (stamp-h.in): Idem.

	* Makefile.in (distclean, realclean): Force serial execution of
	both goals, in case parallel makes are being used.
	Reported by Jim Meyering.

	* src/Makefile.in (DISTFILES): Distribute TAGS.
	(distclean): Do not remove TAGS.
	(realclean): Remove it.
	Reported by Karl Berry.

1994-09-10  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Use fp_ to match aclocal.m4.  Revert _OS_ macros
	to old names, for following Autoconf.

1994-09-08  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (MDEFINES): Remove INSTALL substitutions, for
	./install.sh will not be correctly referred to in sub-Makefiles.
	Reported by John David Anglin.

	* doc/Makefile.in (texclean): Remove *.cps and *.fns too.
	Reported by Eric Backus.

	* Makefile.in, checks/Makefile.in, doc/Makefile.in,
	examples/Makefile.in, lib/Makefile.in, src/Makefile.in: Limit
	config.status into remaking this directory's Makefile only.
	* Makefile.in (stamp-h): Do not check nor touch stamp-h.
	* configure.in (AC_OUTPUT): Touch stamp-h if CONFIG_HEADERS.
	Reported by Jim Meyering.

1994-09-06  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Correct stack overflow detection logic, taking
	care of systems having only incomplete implementations (like for
	Pyramid 9820 OSx 5.0d).
	Reported by Kaveh R. Ghazi.

	* src/Makefile.in (TAGS): Remote -t from etags call.

1994-09-02  François Pinard  <pinard@iro.umontreal.ca>

	* lib/Makefile.in (install): Depend on all.

1994-08-31  François Pinard  <pinard@iro.umontreal.ca>

	* examples/Makefile.in (mostlyclean): Do not depend on texclean.
	Reported by Jim Meyering and John David Anglin.

	* Makefile.in (distclean-local): Delete config.log.
	Reported by Jim Meyering.

	Solidify frozen files with respect to -P:
	* src/m4.c: Have -P set prefix_all_buitins variable instead of
	calling a function by that name.  Declare the variable.
	* src/m4.h: Adjust declaration for prefix_all_buitins.
	* src/builtin.c (builtin_init): Merge in functionality from
	previous prefix_all_buitins function, while making entries in the
	symbol table, but not modifying the builtin description itself.

	* src/freeze.c (reload_frozen_state): Add a useless `break;',
	because *many* compilers do not accept an empty `default:'.
	Reported by Akiko Matsushita, Eric Backus, John David Anglin,
	Joseph E. Sacco, Kaveh R. Ghazi, Tom McConnell and Ulrich Drepper.

	* configure.in: Use AC_TYPE_SIGNAL.
	* src/stackovf.c (setup_stackovf_trap): Use RETSIGTYPE.
	Reported by Robert Bernstein.

	* checks/Makefile.in (check): Modify PATH so check-them will find
	m4 in the src directory.
	* Makefile.in (check): Don't.
	Reported by Akiko Matsushita and Jim Meyering.

	* src/output.c (make_room_for, output_character_helper): New
	functions, for implementing a global MAXIMUM_TOTAL_SIZE instead of
	a per buffer MAXIMUM_BUFFER_SIZE.

	* src/output.c (output_text): New function, for optimizing the
	output of strings of characters.  Use it.

1994-08-30  François Pinard  <pinard@iro.umontreal.ca>

	* doc, src: New directories reorganizing the distribution.
	* doc/Makefile.in, src/Makefile.in, examples/Makefile.in: New
	files.
	* Makefile.in: Adjusted.
	* configure.in: Configure new Makefiles.

	* m4.h: Declare STRING typedef.  Use it for comment and quote
	strings, adjusting all references.  (This is the rudiments of a
	beginning for the eventual withdrawal of NUL terminated strings.)
	* output.c (shipout_text): Accept a length parameter, and use it.
	All callers adjusted.

1994-08-29  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Include <unistd.h> if it exists.
	* stackovf.c: Don't.

	Clean up for current_diversion variable:
	* output.c: Move current_diversion from builtin.c.
	* m4.h: Declare current_diversion so builtin.c can access it.
	* output.c (output_init, make_diversion): Initialize or update
	current_diversion.
	* builtin.c (builtin_init, m4_divert): Leave current_diversion
	alone.

	Remove limit on number of diversions:
	* output.c: Replace ndiversion by diversions, declare it.
	(output_init): Allocate only diversion 0.
	(make_diversion): Allocate new diversions as needed.
	* m4.h, m4.c: Remove NDIVERSIONS and ndiversion related stuff.
	* m4.c: Still accept -N, but do nothing with it.
	Reported by David MacKenzie.

	Freeze diversions:
	* output.c (freeze_diversions): New function.
	* m4.h: Declare freeze_diversions.
	* freeze.c: Document frozen file format, revise it, call
	freeze_diversions to add diversions to frozen format, and code to
	reload them properly.
	* m4.c: Do not undivert automatically at end when status being
	frozen.  Do not call builtin_init when reloading frozen state.

	Speed up diversion processing:
	* output.c: Add INITIAL_BUFFER_SIZE, MAXIMUM_BUFFER_SIZE,
	COPY_BUFFER_SIZE, in-memory diversion buffers, struct diversion
	structure and variables, cached variables out of output_diversion,
	reallocate_diversion_for and OUTPUT_CHARACTER.
	(shipout_text, make_diversion, insert_diversion): Adapted to new
	structures.
	(insert_file): Use better buffering.
	Reported by David MacKenzie.

1994-08-28  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in, lib/Makefile.in, checks/Makefile.in: Arrange so
	dist works from another build directory.

1994-08-27  François Pinard  <pinard@iro.umontreal.ca>

	* symtab.c (hack_all_symbols): Use hash_table_size instead of
	constant HASHMAX, for -H option to work better.

	* builtin.c (DECLARE): Simplify by using _ ().

	* freeze.c: New file.
	* Makefile.in: Compile it, distribute it.
	* m4.c: Recognize, document and process --freeze-state (-F) and
	--reload-state (-R) options.  Pass a true flag to builtin_init
	only if no reloading some state.
	* builtin.c (define_builtin): Remove static specifier.
	(find_builtin_by_name): Remove static specifier.
	(builtin_init): Accept and obey a flag argument.
	* m4.h: Add declarations for freeze.c, changes for builtin.c.

1994-08-24  François Pinard  <pinard@iro.umontreal.ca>

	* builtin.c (dumpdef_cmp): Rewrite so the cast protect the const
	specifier.

	* configure.in: Implement --with-dmalloc.
	* acconfig.h: Document WITH_DMALLOC.
	* m4.h: Add code for when WITH_DMALLOC.

1994-08-15  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c (long_options): Use "error-output", the dash was missing.
	Reported by Akiko Matsushita.

1994-08-12  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Include <sys/types.h>.
	* builtin.c, debug.c, m4.c, output.c, stackovf.c: Don't.
	* m4.h: Declare len_lquote and len_rquote as size_t, not int.
	int.
	* input.c: Declare len_lquote, len_rquote, len_bcomm and len_ecomm
	as size_t, not int.
	* builtin.c (dump_args): Declare len as size_t, not int.

	* debug.c: Prototype the forward declaration of debug_set_file.

	* builtin.c (m4_undivert):  Replace div by file, for avoiding the
	shadowing of this variable.
	* output.c (insert_diversion): Idem.

	* input.c: Delete def_rquote, def_lquote, def_bcomm and	def_ecomm.
	(input_init): Duplicate default quote and comment strings.
	(set_quotes): Free previous quote strings in all cases.  Duplicate
	even default quote strings.
	(set_comment): Free previous comment strings in all cases.
	Duplicate even default comment strings.

	* configure.in: Updated for Autoconf 2.0.
	* Makefile.in (distclean-local): Also delete config.cache.

	* m4.c (usage): Reorganize the --help output by topic.  Include a
	description for debugging flags.

1994-07-29  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: If sigaction is available and SA_ONSTACK defined,
	use sigaction.  Otherwise, if sigvec is available and SV_ONSTACK
	defined, use sigvec.  Else don't compile stackovf.c.
	* stackovf.c (setup_stackovf_trap): Idem.
	Reported by Jim Avera, Karl Berry, Kaveh R. Ghazi, Matthias Rabe
	and Simon Leinen.

1994-07-21  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c (usage): Replace printf par fputs.

1994-07-18  François Pinard  <pinard@iro.umontreal.ca>

	* Release 1.2

1994-07-17  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Check for sigaction and sigvec.  Add a new delayed
	check for RLIMIT_STACK, combine in the checking for getrlimit.
	All those things are not universally available.
	* stackovf.c: Split setting up the trap handler and catching
	signals, for better taking care of various configure outcomes.
	* examples/stackovf.sh: Correct a typo.
	Reported by Eric Backus, Jim Avera and Jim Meyering.

1994-07-16  François Pinard  <pinard@iro.umontreal.ca>

	* ansi2knr.c: New version sent by its author, Peter Deutsch.

1994-07-15  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in: Modify so parallel make will not try making
	lib/libm4.a twice simultaneously.
	Reported by Jim Meyering.

1994-07-14  François Pinard  <pinard@iro.umontreal.ca>

	* stackovf.c (setup_stackovf_trap): Replace "Don't" by "Do not" in
	error message, for when no code possibility exists.  Even if this
	line is completely #ifdef'ed out, it brings a syntax error.
	Reported by Andreas Schwab, Jim Meyering and Joseph E. Sacco.

	* Makefile.in (install): Have install depend on all too, for lib
	to be remade as needed.

	* examples/stackovf.sh: Try ksh, bsh and bash for shells
	providing ulimit, instead of using only ksh.
	Reported by Jim Avera and Joseph E. Sacco.

1994-07-12  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (check): Have it depend on all instead of m4.  In
	this way, a change in lib will be detected and processed.

	* builtin.c (numeric_arg): Use strtol and verify the conversion,
	instead of using sscanf which stops as soon as there is a
	non-digit in the input.  Previously, incr(1xyzzy), eval(1,2xyzzy)
	and divert(1xyzzy) were all accepted without any warning or error
	messages.
	* m4.h: Declare strtol as long if not including stdlib.h.
	* configure.in: Check for limits.h, and replace strtol if missing.
	* lib/Makefile.in: Substitute LIBOBJS.  Distribute strtol.c.
	* lib/strtol.c: New file, from elsewhere.
	Reported by Andreas Schwab.

1994-07-07  François Pinard  <pinard@iro.umontreal.ca>

	* macro.c (expand_macro): Cast value to (boolean) prior to
	assigning it to traced.
	Reported by Tom McConnell.

	* Makefile.in (m4): Always make all in lib first.
	Reported by Jim Meyering.

1994-07-06  Jim Avera <jima@netcom.com>

	* stackovf.c: Isolated OS-dependent sections; Improved portability,
	adding support for SunOS/BSD (sigvec, sigstack, and 4-parameter signal
	handlers), and a default error message if the fault address is not
	available (when neither siginfo.h nor BSD sigcontext are supported).
	* configure.in: Changes for stackovf.h: Check for sigcontext,
	sigaction, sigstack, and define rlim_t as int if necessary.
	* acconfig.h: Added HAVE_SIGCONTEXT and rlim_t.
	* examples/stackovf.sh: Run m4 -L99999999 to allow stack overflow.
	* ansi2knr.c: Fix for func-ptr args; convert "..." to varargs syntax.

1994-07-05  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Use AC_SET_MAKE.
	* Makefile.in: Use @SET_MAKE@.
	Reported by Jim Meyering.

	* checks/check-them: Do not trap on SIGQUIT or SIGALRM.
	Reported by Ian Taylor.

1994-07-02  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Remove dependency of USE_STACKOVF on STDC_HEADERS,
	because siginfo.h is unrelated to standard headers, and siginfo.h
	is already checked for.
	Reported by Joseph E. Sacco.

	* acconfig.h, aclocal.m4, m4.h: Replace HAVE_PROTOTYPES by
	PROTOTYPES.
	* aclocal.m4, configure.in: Replace AC_HAVE_PROTOTYPES by
	AC_PROTOTYPES.

1994-06-29  François Pinard  <pinard@iro.umontreal.ca>

	* builtin.c (substitute): Use \& to represent this part of the
	string which was matched by the whole regexp, instead of
	representing the whole string.  Any usage of \0 issues a warning
	and acts like \&, it will disappear in some subsequent release.

1994-06-27  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c: Complete prototype for forwarded declaration of usage.

	* input.c (init_macro_token): Correct own reference in error
	message.  Previous name get_macro_func was referred to instead.
	(next_char):  Correct own reference in error message.  Previous
	name advance_input was referred to instead.

	* m4.h: Declare eval_t and unsigned_eval_t typedefs to 32 bits.
	* eval.c (logical_or_term, logical_and_term, or_term, xor_term,
	and_term, not_term, logical_not_term, cmp_term, shift_term,
	add_term, mult_term, exp_term, unary_term, simple_term): Add
	prototype to forwarded declarations.  Declare parameter v1 as
	eval_t * instead of int *.  Same for local variable v2 in dyadic
	functions.  Same for result in exp_term.
	* builtin.c (m4_eval): Declare value as eval_t instead of int.
	(ntoa): Declare value as eval_t instead of int.  Declare uvalue as
	unsigned_eval_t instead of unsigned int.  Change casts accordingly.
	(shipout_int): Cast first argument of ntoa to eval_t.
	Reported by Thorsten Ohl.

	* macro.c: Complete the prototypes of forwarded expand_macro and
	expand_token.
	Reported by Thorsten Ohl.

	* m4.h: Define voidstar as void * or char * depending on __STDC__.
	The Ultrix 3.1 compiler cannot do much with void pointers.

	* builtin.c (dumpdef_cmp): Replace void * by voidstar.
	* m4.c (xfree):  Replace void * by voidstar.
	Reported by Tom McConnell.

	* ansi2knr.1: New, from elsewhere.
	* Makefile.in (DISTFILES): Distribute ansi2knr.1

	* Makefile.in (stamp-h.in): Avoid running ./config.status if
	stamp-h does not exist yet.  This avoids running it a second time
	just after the initial ./configure.
	Reported by David MacKenzie and Tom McConnell.

	* m4.h: Replace the enum debug_info declaration with a series of
	#define's.  The Ultrix 3.1 compiler would otherwise need casting
	(int) to most references, when used in expressions.
	Reported by Tom McConnell.

1994-06-25  François Pinard  <pinard@iro.umontreal.ca>

	* aclocal.m4: Replace FP_PROTOTYPES by AC_HAVE_PROTOTYPES,
	following an idea from Brook G. Milligan.  AC_HAVE_PROTOTYPES
	calls the compiler.  Previously, FP_PROTOTYPES was only calling
	the preprocessor; by not being subject to CFLAGS, this was
	discouraging those flags asking for ANSI compilation.
	* acconfig.h: Document HAVE_PROTOTYPES.
	* configure.in: Use AC_HAVE_PROTOTYPES instead of FP_PROTOTYPES.
	* m4.h: Define _() according to HAVE_PROTOTYPES, not __STDC__.
	Reported by Eric Backus.

	* configure.in: Substitute CFLAGS and LDFLAGS, taking their value
	from the environment.  Default CFLAGS to -g if not set.
	* Makefile.in: Have CFLAGS and LDFLAGS substituted from configure.
	* lib/Makefile.in: Have CFLAGS substituted from configure.
	Reported by Eric Backus and Tom McConnell.

	* configure.in: m4_undefine changeword before using AC_ENABLE.

	* m4.h: Declare prototypes for error (for ANSI compilers only),
	prefix_all_builtins and reference_error.
	Reported by Tom McConnell.

	* input.c (set_word_regexp): Do not try to initialize the array
	test from a string, this does not work with non-ANSI compilers.
	Reported by Eric Backus.

	* Makefile.in (dist): Clean examples/ before saving it.
	(distclean-local): Also remove stamp-h.
	Reported by Eric Backus.

	* Makefile.in (_stackovf.c): Goal for compiling stacokovf.c with
	non ANSI compilers.
	Reported by Tom McConnell.

	* checks/Makefile.in (clean): Depends on mostlyclean.
	(mostlyclean): New goal.

1994-06-24  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (DISTFILES): Distribute install.sh.
	* install.sh: New file, copied from elsewhere.
	Reported by Assar Westerlund and Kaveh R. Ghazi.

1994-06-23  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Define ENABLE_CHANGEWORD if --enable-changeword.
	* acconfig.h: Explain ENABLE_CHANGEWORD.

	[These modifs all depend upon ENABLE_CHANGEWORD and are adapted
	from code provided by Pete Chown]
	* m4.h: Add original_text field to u_t variant of union u.
	Declare TOKEN_DATA_FUNC macro.
	* builtin.c: Declare changeword.
	(m4_changeword): New function.
	* input.c: Include "regex.h", define variables with word regexps.
	(input_init): Initialize the word regexp.
	(set_word_regexp): New.
	(next_token): Declare local variables, use the previous code if
	default_word_regexp is true.  Else, match using a new code.  Save
	the original text.
	* macro.c (expand_token): Ship out original text if not a macro
	name.
	Reported by Krste Asanovic and Pete Chown.

	[These modifs all depend upon ENABLE_CHANGEWORD]
	* m4.h: Declare external user_word_regexp.
	* m4.c: Declare user_word_regexp, and initialize it from
	--word-regexp or -W, or NULL if not specified.
	* input.c: Use user_word_regexp if specified, instead of
	DEFAULT_WORD_REGEXP.

	* Makefile.in (m4): Revert Jan 3 1994 change.  I'm unable to
	agree with it.

	* Makefile.in, lib/Makefile.in: Limit suffixes to .c and .o.
	* checks/Makefile.in: Empty the suffix list.
	Reported by Geoff Russell, Joel Sherrill and Roland McGrath.

	* m4.c: Declare nesting_limit and initialize it to 250.
	Implement -LNUMBER or --nesting-limit=NUMBER to change its
	value.
	* m4.h: Declare nesting_limit as external.
	* macro.c (expand_macro): Stop execution whenever nesting limit
	is exceeded.
	Reported by Bengt Mertensson.

	* eval.c (evaluate): Diagnose excess characters in eval input.
	Things like `eval(08)' used to return 0 with no diagnostic.

	* m4.h: Capitalize first letter of all macro arguments in
	definitions.

	* m4.c: Declare warning_status, initialize it to 0.  Add new
	option -E, or --fatal-warnings, which sets warning_status to
	EXIT_FAILURE instead.
	* m4.h: Declare external warning_status.  Define EXIT_SUCCESS and
	EXIT_FAILURE if not otherwise done by header files.
	* m4.c: Delete declarations for EXIT_SUCCESS and EXIT_FAILURE.
	* m4.c, input.c, output.c, symtab.c, builtin.c, macro.c, debug.c,
	eval.c: Replace 0 by warning_status and 1 by EXIT_FAILURE in first
	argument of all M4ERROR calls.
	Reported by Noah Friedman.

	* examples/incl-test.m4: Renamed from incl_test.m4.
	* examples/include.m4: Include incl-test.m4 instead of
	incl_test.m4.
	* examples/multiquotes.m4: Renamed from multi-quotes.m.

1994-06-22  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Avoid USE_STACKOVF if <siginfo.h> not found.  Note
	that Jim developped stackovf.c on a 486 running SVR4.0 (ESIX), and
	also tested it on a Sun Sparc workstation running SunOS 4.x.

	* format.c (format): When not HAVE_EFGCVT, m4 was failing the
	49.format check, abusing a `union values' argument with sprintf
	without selecting the proper field.  Now, save the formatting type
	first, delaying the fetch of the corresponding argument.
	Reported by Joseph E. Sacco and Tom Quinn.

	* format.c (format): Remove const from char *fmt declaration when
	not HAVE_EFGCVT, because a NUL may be forced into it.

	* m4.h: Declare atof() when not STDC_HEADERS.
	Reported by Joseph E. Sacco.

	* Regenerate configure using Autoconf 1.11, this corrects a
	problem about an incorrect cpp seting on NeXT 3.1.
	Reported by Alexander Lehmann.

1994-06-05  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h (_): Change argument from `x' to `Args'.

1994-04-22  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Rename Args() to _().
	* m4.h: Remove extern specifier from all function declarations.

1994-04-22  Jim Avera <jima@netcom.com>

	* stackovf.c: New file implementing stack-overflow detection.
	* configure.in: Check for getrlimit, sigaction.  If all of
	standard headers, getrlimit and sigaction, define USE_STACKOVF and
	substitute ${U}stackovf.o for STACKOVF.
	* acconfig.h: Declare USE_STACKOVF.
	* Makefile.in: Distribute stackovf.c, link with $(STACKOVF).
	* m4.h: Declare setup_stackovf_trap().
	* m4.c: Call setup_stackovf_trap().
	* tests/stackovf_test.sh: New file.

1994-04-13  François Pinard  <pinard@iro.umontreal.ca>

	* checks/Makefile.in: Rename .all-stamp to stamp-checks.

	* Makefile.in (Makefile, etc.): Adapt for Autoconf 1.8.

1994-01-30  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Remove definition of volatile, not used anymore.
	Reported by Jim Meyering and Joseph E. Sacco.

	* m4.h: Consistently use `do { ... } while (0)' in macros, instead
	of `if ... else /* nothing */' for if macros.
	Reported by Jim Meyering.

	* builtin.c (m4_regexp): Reorganize the code for avoiding a
	warning from gcc about `repl' possibly used before defined.
	Reported by Jim Meyering.

	* m4.h: Avoid a pre-ANSI <memory.h> together with <string.h>.
	Reported by Jim Meyering.

1994-01-25  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Move the conditional definition of volatile after the
	inclusion of system files, because they may define it first.

1994-01-04  François Pinard  <pinard@iro.umontreal.ca>

	* checks/Makefile.in (CHECKS): Add a useless `*' before `[', to
	get around a problem with Alpha make seeing a syntax error, there.
	Reported by Vern Paxson.

1994-01-03  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in: Do not define LDFLAGS, use CFLAGS on link calls.
	Reported by Richard Stallman.

1993-12-25  François Pinard  <pinard@iro.umontreal.ca>

	* configure.in: Correct test for strerror, AC_FUNC_CHECK was used
	instead of AC_HAVE_FUNCS.
	Reported by Noah Friedman.

1993-12-01  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c: Initialize show_help and show_version to zero.

	* m4.c: Ensure EXIT_SUCCESS and EXIT_FAILURE are defined.
	Use them in exit() and usage() calls.

1993-11-27  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Delete extern sys_nerr, sys_errlist declarations, and
	syserr() macro.  Delete errref, add reference_error and M4ERROR.
	* m4.c: Replace errref, which was returning an input reference
	string, with reference_error, which prints it on standard error.
	* builtin.c, output.c: Use errno as second parameter to error,
	instead of using syserr() with %s.
	* *.c: Use M4ERROR instead of error: no more errref() with %s.
	Doing so, the program name appears after the input reference
	instead of before, which eases M-x next-error processing.

1993-11-24  François Pinard  <pinard@iro.umontreal.ca>

	* checks/get-them: Escape braces with backslashes in patterns,
	because HPUX-9.01 awk needs this.
	Reported by Jim Meyering.

1993-11-22  François Pinard  <pinard@iro.umontreal.ca>

	* builtin.c: Declare "FILE *popen ();".

	* m4.h: Remove MESSAGE{,1,2}, WARNING1, FATAL{,1}, INTERNAL_ERROR
	macros, replace error_message_prefix() declaration by errref()'s.
	Declare xrealloc, for use in errref().
	* m4.c: Delete error_message_prefix() function, add errref().
	* *.c: Use error() systematically in place of all error macros,
	now that error() flushes stdout first.  Make needed adjustments.

	* m4.h: Remove const in sys_errlist[] declaration, it creates
	conflicts on SGI and Alpha.
	Reported by Kaveh R. Ghazi.

1993-11-20  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c: Include <getopt.h> instead of "getopt.h".

	* configure.in: Output to config.h.  Use HAVE_FUNCS preferably.
	* acconfig.h: New, for documenting HAVE_EFGCVT.
	* Makefile.in: Distribute acconfig.h, .stamp-h.in and config.h.in,
	use them wherever appropriate.  Also use -I. for compilations.
	* lib/Makefile.in: Use -I.. for compilations.
	* *.c: Include <config.h> or "config.h".

	* m4.h: Test for HAVE_MEMORY_H instead of NEED_MEMORY_H.
	* configure.in: Use AC_HAVE_HEADERS(memory.h), delete AC_MEMORY_H.

1993-11-17  François Pinard  <pinard@iro.umontreal.ca>

	* builtin.c (m4_eval): Cast strlen to (int) before comparing.

	* input.c (input_init): Initialize quote and comment strings
	explicitely instead of calling set_quotes and set_comment: by
	doing so, we ensure we do not free uninitialized variables.

	* checks/check-them: Reverse arguments to both diff, so the
	expected is on the left and the obtained on the right.

	* m4.h: Add MESSAGE{,1,2}, WARNING1, FATAL{,1} and INTERNAL_ERROR
	macros. Delete declarations for m4error, warning, fatal and
	internal_error, add declaration for error_message_prefix.
	* m4.c:  Delete m4error, warning, fatal and internal_error
	routines, add error_message_prefix routine.
	* *.c: Replace m4error routine calls with MESSAGE* macro calls,
	warning with WARNING*, fatal with FATAL* and internal_error with
	INTERNAL_ERROR*.
	* Makefile.in (_m4.c): Do not adjust ansi2knr output for va_alist,
	this is not needed anymore.

	* m4.h: Declare extern FILE *debug.  Add DEBUG_PRINT{1,3} and
	DEBUG_MESSAGE{,1,2} macros.  Delete declarations for debug_print
	and debug_message, add declaration for debug_message_prefix.
	* debug.c: Remove static specifier for FILE *debug declaration.
	Delete debug_print and debug_message routines, add
	debug_message_prefix routine.
	* builtin.c, debug.c: Replace debug_print routine calls with
	DEBUG_PRINT* macro calls.
	* input.c, path.c: Replace debug_message routine calls with
	DEBUG_MESSAGE* macro calls.

	* m4.h: Remove inclusion of <varargs.h>.
	* debug.c: Include <stdarg.h> or <varargs.h>.
	(trace_format): Use stdarg instead of varargs if __STDC__.

	* configure.in: Remove checks for vfprintf and _doprnt.  These
	implementations use varargs tricks which are not portable enough.
	* lib/vfprintf.c: Deleted.
	* lib/_doprnt.c: Deleted.
	* lib/Makefile.in: Adjusted accordingly.  Remove LIBOBJS.
	Reported by Joel Sherrill.

	* path.c (add_include_directory): Use xstrdup.

	* builtin.c (find_builtin_by_name): Declare static.

	* *.[ch]: Add const to a few "char *" declarations.

	* configure.in: Remove commented tests for fileno() and fstat().
	* debug.c: Remove comments about HAVE_FILENO and HAVE_FSTAT.

	* debug.c (debug_flush_files): New.
	* m4.h: Declares it.
	* builtin.c (m4_syscmd, m4_esyscmd): Use it.
	Reported by Nicolas Pioch.

1993-11-12  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (m4.dvi): Use m4.texinfo instead of m4.texi.
	Reported by Joel Sherrill.

	* builtin.c (prefix_all_builtins): Instead of the table size, use
	the null entry at end for stopping the loop.  It was overwritten.
	Reported by Andreas Schwab and Jim Meyering.

	* builtin.c (prefix_all_builtins): Cast xmalloc to (char *).
	Reported by Kaveh R. Ghazi.

	* macro.c (call_macro): Add * in (*SYMBOL_FUNC (sym)) (...).
	Reported by Karl Vogel.

1993-11-09  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Do not define volatile if already defined.
	Reported by René Seindal.

	* lib/Makefile.in: Add a forgotten ALLOCA=@ALLOCA@.  Grrr!

	Reported by Bernhard Daeubler, Eric Backus, Hal Peterson, Hoang
	Uong, Ian Taylor, Kaveh R. Ghazi, Tom McConnell and Walter Wong.

1993-11-08  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Define strchr and strrchr in terms of index and rindex,
	instead of the other way around.
	* builtin.c, m4.c, path.c: Use strchr instead of index.

	* input.c (next_char): Remove a "break;" after a "return ...;".
	Reported by Tom McConnell.

1993-11-08  François Pinard  <pinard@iro.umontreal.ca>

	* Release 1.1

	* configure.in: Do not copy check files in the build hierarchy.
	* checks/check-them: Identify the m4 version being checked.  For
	finding m4, look in $PATH instead of in the parent directory.
	* Makefile.in (check): Prepend `pwd` to $PATH before checking.
	* checks/Makefile.in (.all-stamp): Always create check files in
	the source hierarchy, not anymore in the build hierarchy.
	(check): cd to the source hierarchy before performing checks.
	Do not copy nor clean COPYING anymore, take it from `..'.
	Reported by Tom McConnell.

	* Makefile.in (Makefile): Use $(SHELL).
	(config.status): Use $(SHELL).  Use "config.status --recheck"
	instead of "configure --no-create", which is obsolete.
	Reported by Tom McConnell.

1993-11-05  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c (usage): Use "%s" instead of "m4" in format string.
	Reported by Jim Meyering.

	* Makefile.in: Distribute mkinstalldirs.
	Reported by Pierre Gaumond.
	Reported by Jim Meyering.
	Reported by Tom McConnell.
	Reported by Andreas Gustafsson.

	* checks/check-them: Renamed from checks/check_them.
	* checks/get-them: Renamed from checks/get_them.
	* checks/.all-stamp: Renamed from checks/.all_stamp.
	* checks/Makefile.in: Changed accordingly.
	Reported by Jim Meyering.

1993-11-04  François Pinard  <pinard@iro.umontreal.ca>

	* lib/Makefile.in (dist): Correct permissions on files.

	* output.c: Declare tmpfile, some systems don't.

1993-11-03  François Pinard  <pinard@iro.umontreal.ca>

	* checks/Makefile.in (dist): Correct permissions on files.

	* Makefile.in (dist): Ensure recursive linking for subdirectory
	`examples', also set read/write permissions on all its files.

	* mkinstalldirs: New, from elsewhere.
	* Makefile.in: Use it.

	* debug.c: Synchronize debug messages and regular output when
	the debug file and stdout are redirected to the same file.
	* configure.in: Add (commented) checks for fileno and fstat.
	Reported by Jim Avera.

	* builtin.c (m4_ifelse): Diagnose excess arguments if 5, 8, 11,
	etc., arguments, then ignore the superfluous one.  m4 used to
	diagnose missing arguments and return the empty string.
	Reported by Nick S. Kanakakorn.

1993-11-02  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c (main): At end of all input, ensure all undiverted text
	goes to the main output stream.
	Reported by Andreas Gustafsson.

	* m4.c (main): exit (0), instead of return 0.

	* m4.c: Implement -P and --prefix-builtins.
	* builtin.c: Delete const specifier on builtin_tab.
	(prefix_all_builtins): New.
	Reported by Noah Friedman.
	Reported by Scott Bartram.

	* c-boxes.el: New, from elsewhere.
	* Makefile.in: Distribute it.

	* m4.h: Do not define bcopy if <string.h> defines it.
	Reported by Stephen Perkins.

	* builtin.c (define_macro): Allow a missing second argument, in
	which case it is implied empty.  Affects define and pushdef.
	Reported by Eric Allman.

1993-11-01  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Add blind_if_no_args in struct builtin, blind_no_args in
	struct symbol adn SYMBOL_BLIND_NO_ARGS macro.
	* builtin.c: Initialize all the blindness fields in builtin_tab.
	(define_builtin): Copy the blindness of a builtin into its symbol.
	* macro.c (expand_token): Avoid processing a blind builtin if the
	next character is not an opening parenthesis.
	Reported by David MacKenzie.
	Reported by Noah Friedman.

	* configure.in: Ensure an exit status of 0 on completion.
	Reported by Vivek P. Singhal.

	* eval.c (eval_lex): Admit both lower and upper case letters for
	bases greater than 10.  Only lower case letters were accepted.

	* eval.c (eval_lex): Recognize 0bDIGITS and 0rRADIX:DIGITS syntax.
	Reported by Krste Asanovic.

	* eval.c:  Rename NOT to LNOT.  Add XOR, NOT, LSHIFT and RSHIFT.
	* eval.c (logical_not_term): New name for not_term.
	* eval.c (xor_term): New, between or_term and and_term.
	* eval.c (not_term): New, between and_term and logical_not_term.
	* eval.c (shift_term): New, between cmp_term and add_term.
	Reported by Krste Asanovic: ~, ^, <<, >>.
	Reported by Ben A. Mesander: ** vs ^.

	* m4.c: Delete xmalloc.c, xrealloc.c, xstrdup.c.
	* m4.h: Delete xrealloc.c.
	* lib/xmalloc.c: New, from elsewhere.
	* lib/xstrdup.c: New, from elsewhere.
	* lib/Makefile.in: Distribute and compile them.

	* m4.c: Change progname to program_name.
	* builtin.c, eval.c, m4.c, m4.h: Rename error to m4error.
	* lib/error.c: New, from elsewhere.
	* lib/Makefile.in: Distribute and compile error.c.
	* configure.in: Check AC_VPRINTF and for strerror.
	* m4.c: Delete cmd_error.  Use error instead.
	* m4.c: Change label capitalisation to "ERROR", "Warning", etc.

	* m4.h: Delete #define const, let Autoconf takes care of this.

	* m4.c: Remove all code conditionalized by IMPLEMENT_M4OPTS.
	Merge parse_args into main.  Declare argv to be `char *const *',
	then remove superfluous casts.

	* m4.c: Rename --no-gnu-extensions to --traditional.
	Reported by Ben A. Mesander.

	* m4.c (usage): Add a status parameter.  Supply one in various
	calls.  Add --help processing.  Remove -V for --version.

	* lib/Makefile.in: Put $(CFLAGS) last in .c.o rule.

	* lib/Makefile.in: Have an AR=ar declaration.
	Reported by Eric Backus.
	Reported by Bjorn R. Bjornsson.
	Reported by Tom Tromey.
	Reported by Kristine Lund.
	Reported by Marion Hakanson.

1993-10-30  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (m4.info): Use -I$(srcdir) on $(MAKEINFO).
	Reported by Noah Friedman.

1993-10-25  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in: Remove MDEFINES and cleanup.

1993-06-09  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (dist): Replace "echo `pwd`" by a mere "pwd".
	Create a gzip file.

1993-02-06  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in, lib/Makefile.in, check/Makefile.in: In dist goals,
	ensure 777 mode for directories, so older tar's will restore file
	modes properly.

1993-01-17  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in, lib/Makefile.in: Put $(CFLAGS) after $(CPPFLAGS),
	so the installer can override automatically configured choices.
	Reported by Karl Berry.

1993-01-15  François Pinard  <pinard@iro.umontreal.ca>

	* lib/vfprintf.c: Stolen from Oleo distribution and adapted.  The
	previous version was not working properly on m68k-hp-bsd4.3.
	Reported by Roland McGrath.

	* lib/_doprnt.c: Stolen from Oleo distribution.
	* configure.in: Check for _doprnt.c if vfprintf.c selected.
	* lib/Makefile.in: Distribute _doprnt.c.
	Do not distribute regex.[ch].old anymore.

1993-01-01  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in, lib/Makefile.in: Reinstate $(CPPFLAGS), use it.
	Richard wants it there.

1992-12-27  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in: Add DEFS to MDEFINES.
	* lib/Makefile.in (.c.o): Remove $(CPPFLAGS).
	(libm4.a): Remove the library before creating it.
	(distclean): Remove tags and TAGS too.

1992-12-23  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (dvi, m4.dvi): New goals.

	* builtin.c, eval.c, format.c, input.c, m4.[ch], m4.texinfo,
	macro.c, output.c, path.c, symtab.c: Change Copyright from
	1989-1992 to the explicit enumeration 1989, 1990, 1991, 1992.

	* examples/divert.m4: Deleted, this bug has been corrected.

	* Makefile.in (texclean, mostlyclean): New goals.

	* Makefile.in (clean): Remove clutter from ansi2knr.
	Reported by Pierre Gaumond.

1992-12-20  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in: Remove $(CPPFLAGS) from the .c.o rule.  The user
	might well use CFLAGS is s/he needs it.

	* Makefile.in: Allow installation of info files from a separate
	build directory.
	Reported by Jason Merrill.
	Reported by David MacKenzie.
	Reported by Skip Montanaro.
	Reported by Erez Zadok.
	Reported by Assar Westerlund.

1992-12-19  François Pinard  <pinard@iro.umontreal.ca>

	* Release 1.0.3
	This is still a	beta release for the future GNU m4 version 1.1.

	* lib/alloca.c: New, from elsewhere.
	* lib/Makefile.in: Distribute it.  Define and use $(ALLOCA).

	* m4.h: Do not define index/rindex if already defined.  If
	FALSE/TRUE are already defined, do not redefine them, but merely
	define boolean typedef to int.

	* Makefile.in: Use $(DEFS) while compiling ansi2knr.
	* ansi2knr.c: Rewrite #ifdef HAVE_STRING_H || STDC_HEADERS,
	because some C compilers do not like connectives with #ifdef.
	* m4.h: Define `volatile' only if __GNUC__, instead of once for
	__GNUC__ and once for __STDC__.
	* lib/regex.h: Leave const alone, AC_CONST will take care of it.

	* checks/Makefile.in: Use .all_stamp instead of $(CHECKS) for
	Makefile dependencies.  Without it, make keeps destroying and
	remaking $(CHECKS) in a loop (why?).  Distribute .all_stamp.

	* m4.h, m4.c, builtin.c, output.c: Change all divertion/DIVERTION
	to diversion/DIVERSION, this was a spelling error.

	* m4.c: Declare version[], remove #include "version.h".
	* version.h: Deleted.
	* Makefile.in: Remove references to version.h.

	* output.c (shipout_text): Centralize all `#line NUM ["FILE"]'
	production, by using a simpler and more robust algorithm.  This
	solves the problem of synclines sometimes written in the middle of
	an output line.  Delete sync_line() and output_lines variable.
	* m4.h: Remove sync_line prototype and output_lines declaration.
	* input.c (next_char), output.c (shipout_text): Remove references
	to output_lines.
	* input.c (push_file, pop_file): Merely put the value -1 in
	output_current_line instead of calling sync_line, for delaying a
	single `#line NUM FILE' before next output line.  Do not test
	for sync_output, because this is unnecessary clutter.
	* output.c (make_divertion, insert_divertion): Idem.
	* input.c: Rename must_advance_line to start_of_input_line, for
	consistency.

	* debug.c (trace_header): Select a new debug line format, which
	better complies with GNU standards for formatting error messages.
	With option `-dfl', M-x next-error might be used on the output.
	* m4.c (vmesg): Adjust format of error output to GNU standards.
	* m4.texinfo: Adjust examples for `make check' to work.

	* m4.h, builtin.c, debug.c, input.c, macro.c, path.c: Use upper
	case for enum debug_info constants, which were all lower case.

	* builtin.c (m4_regexp, m4_patsubst): Use re_search instead of
	re_search_2.
	* lib/regex.[ch]: Use new version from textutils 1.3.6, with some
	collected patches.  I tried a few times using newer regex.[ch], it
	mysteriously stopped aborting with this one.  Insecure feeling...
	* lib/Makefile.in: Distribute regex.[ch].old, just in case!

1992-12-18  François Pinard  <pinard@iro.umontreal.ca>

	* m4.c: Change `--no-warnings' to `--silent'.
	Reported by David MacKenzie.

	* m4.c: Put all M4OPTS code upon IMPLEMENT_M4OPTS control, and
	leave it off for now.  See comment in m4.c for justification.
	Reported by David MacKenzie.

	* configure.in: Replace AC_USG by AC_HAVE_HEADERS(string.h).
	* m4.h, ansi2knr.c, lib/regex.h: Replace USG by HAVE_STRING_H.

	* Makefile.in: Add a new `info' goal.  Use macro MAKEINFO.

	* Makefile.in: Ensure recursive cleaning is done before local
	cleaning for all clean goals.

	* builtin.c (ntoa): Ensure the value is always interpreted as a
	signed quantity, whatever the radix is.

1992-11-18  Jim Meyering  <meyering@idefix>

	* builtin.c, format.c, input.c: Split long lines.
	* m4.c: Use typedef macro_definition instead of struct
	macro_definition.
	* symtab.c: Use typedef symbol instead of struct symbol.

1992-11-17  François Pinard  <pinard@iro.umontreal.ca>

	* *.[ch]: Remove all trailing whitespace, in code and comments.

	* configure.in: Find some awk.
	* Makefile.in: Add $(AWK) to MDEFINES.
	* checks/Makefile.in: Transmit $(AWK) to get_them.
	* checks/get_them: Use $AWK instead of gawk.  Add a close in the
	awk script when switching files, because without this, mawk runs
	out of file descriptors.

1992-11-16  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (realclean): Delete m4.info*.
	Reported by Jim Meyering.

	* Makefile.in: Adjust and link with checks/Makefile.
	* checks/Makefile.in: New.
	* configure.in: Output checks/Makefile.

	* checks/get_them: Have the dnl header of each test more
	recognizable by next-error, also use a better message.

1992-11-16  Jim Meyering  <meyering@idefix>

	* m4.h [__GNUC__]: Use __volatile__ instead of `volatile.'
	And use that only if __GNUC__ since we're using it's GCC-specific
	semantics that tell the compiler the associated function doesn't
	return.

	* builtin.c (substitute): Don't use character as an array index.
	(dumpdef_cmp): Make formal arguments `const void *' to avoid
	warnings with gcc -W -Wall on systems with qsort prototype.
	(m4_errprint): Cast obstack_finish to `char *' to avoid warnings
	from gcc -W -Wall.

	* eval.c (most functions): Add parentheses to assignments used
	as truth values go avoid warnings from gcc -Wall.

	* input.c, m4.c, output.c, path.c, symtab.c: Declare static
	any functions that don't need external scope.

	* builtin.c, debug.c, format.c, m4.c, m4.h, macro.c, symtab.c
	(many functions and arrays): Declare `const'.

1992-11-15  François Pinard  <pinard@iro.umontreal.ca>

	* *.[ch]: Rename nil to NULL, using the declaration from <stdio.h>,
	removing the declaration from m4.h.  Also rename false to FALSE
	and true to TRUE.

	* lib/Makefile.in (Makefile): New goal.

	* Makefile.in, lib/Makefile.in: Add a .c.o rule, so CFLAGS is not
	so heavily loaded.  It gets more easily overridable, calling make.
	Reported by Jim Meyering.

	* Makefile.in (dist): Get .fname from the current directory name,
	instead of from version.h.  I need updating many files manually,
	when the version changes, version.h is just one of them.

1992-11-14  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Remove the tag `boolean' on the enum introducing typedef
	`boolean'.  This tag conflicts with <sys/types.h> on SVR4.
	Reported by Tom McConnell.

1992-11-13  François Pinard  <pinard@iro.umontreal.ca>

	* m4.texinfo: Correct the examples for 33.divert, 38.divnum,
	39.cleardiv, which were describing missing or spurious newlines.
	Modify examples 52.eval, 53.esyscmd and 54.sysval so the results
	do not depend on machine word size, `/bin/false' implementation,
	or `wc' output format.  `make check' is more dependable, now.

	* checks/check_them: Summarize the failed tests by listing their
	name, at end.  If none, issue `All checks successful'.  Output
	`Checking' instead of `Input file:'.

	* checks/get_them, checks/check_them: Reindented.

	* Makefile.in (dist): chmod a+r before making the tar file.

1992-11-12  François Pinard  <pinard@iro.umontreal.ca>

	* builtin.c (m4_dnl): Diagnose any parameter to `dnl'.

	* input.c (next_token): Reinitialize token_buttom just after using
	it as a watermark with obstack_free.  Or else, a future token, big
	enough for triggering reallocation of the obstack chunk, could
	void the initialized value of token_buttom, later causing panic in
	obstack_free.  Rename token_buttom to token_bottom everywhere.

	* m4.h: Before declaring errno, first include <errno.h> and
	ensure that it does not define errno.
	Reported by Richard Stallman.

1992-11-11  François Pinard  <pinard@iro.umontreal.ca>

	* builtin.c: Define and use DECLARE macro for builtins.

	* builtin.c (m4_ifelse): Avoid any diagnostic when exactly one
	argument, this is a common idiom for introducing long comments.

	* builtin.c (m4_ifelse): If 3n + 2 arguments, diagnose missing
	arguments.  The last argument was silently ignored.

	* m4.c (cmd_error): Add a missing semicolon before va_end().

1992-11-10  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in: Now handle protoized sources.  Define and use U.
	Compile and use ansi2knr with old compilers.  Update DISTFILES.
	Add `aclocal.m4' to `configure' dependencies.
	* ansi2knr.c: New, from Ghostscript distribution.
	* configure.in: Define U through FP_PROTOTYPES for old compilers.
	Add AC_ISC_POSIX, AC_CONST, AC_SIZE_T.
	* aclocal.m4: New, provide FP_PROTOTYPES.
	* m4.h: Conditionnaly protoized through Args, save for varags.
	* builtin.c: Protoized.  Then:
	Include <sys/types.h> if size_t is not defined, before "regex.h".
	(m4_ifelse): Fetch built-in name properly for diagnostic.
	(m4_dumpdef): Remove wrong (char *) cast calling dump_symbol.
	(m4_regexp): Add const to `msg' declaration.
	(m4_patsubst): Add const to `msg' declaration.
	* debug.c: Protoized, save for varargs.
	* eval.c: Protoized.
	* format.c: Protoized.
	* input.c: Protoized.
	* m4.c: Protoized, save for varargs.  Then:
	(xfree): Accept void * instead of char *.
	(xmalloc): Return void * instead of char *.
	(xrealloc): Accept and return void * instead of char *.
	* macro.c: Protoized.
	* output.c: Protoized.
	* path.c: Protoized.  Then cast some (char *) over xmalloc's.
	* symtab.c: Protoized.

1992-11-06  François Pinard  <pinard@iro.umontreal.ca>

	* m4.texinfo: Remove directory from diagnostics in 30.include,
	51.eval, 56.errprint and 57.m4exit tests.

	* m4.h: Remove declarations for int or void system functions, they
	cause more conflicting trouble than they make good.

	* configure.in: Avoid configuration header file.  Add some tests.
	* m4.h: Remove #include "config.h".
	* Makefile.in, lib/Makefile.in: Implement Autoconf interface.
	Then, rewritten for better compliance with GNU standards.

1992-11-05  François Pinard  <pinard@iro.umontreal.ca>

	* format.c (format): Avoid syntax error if not HAVE_EFGCVT,
	because of a misplaced #endif.

	* Many *.[hc] files: Correct intra-line spacing here and there,
	according to GNU indent 1.6 advice.

	* configure.in: New, using Autoconf 1.2.
	* m4.h: Reverse NO_MEMORY_H to NEED_MEMORY_H.
	* Delete old configure.in, configure, etc/configure.in,
	etc/configure, lib/configure.in, lib/configure and config/*.
	Reported by Jason Merrill.

	* symtab.c (hash): Change (char) NULL to '\0'.
	Reported by Jason Merrill.

	* Delete .vers, etc/newdist.sh, etc/newvers.sh and
	etc/nextvers.sh.  Release numbers will be edited `by hand'.
	* version.h: De-automatize, force value in.

	* m4.c: Changes in order to use a newer getopt.h.
	Reported by David MacKenzie.

	* checks/: New name for examples/.
	* checks/get_them: New location for etc/get_examples.
	* checks/check_them: New location for etc/check_examples.
	* Makefile.in, checks/get_them, checks/check_them: Adjust.
	* lib/vfprintf.c: New location for etc/vfprintf.c.
	* Delete empty etc/.
	* examples/: New name for test/.

1992-03-10  François Pinard  <pinard@iro.umontreal.ca>

	* Makefile.in (check): Add m4 as dependency.

	* m4.c: Accept --no-warnings instead of --no_warnings, and
	--no-gnu-extensions instead of --no_gnu_extensions.  Make the
	usage message more informative.
	Reported by David MacKenzie.

1992-03-09  François Pinard  <pinard@iro.umontreal.ca>

	* etc/check_examples: New name for check_examples.sh.
	* etc/get_examples: New name for get_examples.sh.
	* Makefile.in, etc/Makefile.in: Use new names.

	* Makefile.in: Transmit $(CC) while making in lib.

	* Many *.[hc] files: GNU indent'ed, with further fine tuning of
	code disposition by hand.

1992-03-08  François Pinard  <pinard@iro.umontreal.ca>

	* m4.h: Delete definitions for abort() and exit().
	Reported by Richard Stallman.

	* config/hmake-unicos, config/s-unicos.h: New files.
	Reported by Hal Peterson.

	* eval.c (exp_term): Have N^0 return 1.
	Reported by Michael Fetterman.

	* eval.c, input.c, m4.h: Remove last comma in enums.
	Reported by Mike Lijewski.

	* Transfer of maintenance duties from René to François.

1991-10-24  René Seindal <seindal@diku.dk>

	* Release 1.0.  Many thanks to those, who provided me with bug
	reports and feedback.

	* Uses GNU configure, taken from the gdb distribution.

	* Uses GNU getopt(), with long option names.

	* The -Q/+quiet option is added, which suppresses warnings about
	missing or superflous arguments to built-in macros.

	* Added default options via the M4OPTS environment variable.

	* The built-in format can now be configured to use sprintf as
	the formatting engine, for systems without [efg]cvt(3).

	* GNU library code is moved to the ./lib subdirectory; other
	utility files are now in ./etc.

	* Several minor bugs have been fixed.

1991-07-26  René Seindal <seindal@diku.dk>

	* Fixed various bugs.  Release 0.99, manual 0.09.  Many thanks to
	François Pinard and Roland H. Pesch for providing me with reports.

	* The builtins incr and decr are now implemented without use of
	eval.

	* The builtin indir is added, to allow for indirect macro calls
	(allows use of "illegal" macro names).

	* The debugging and tracing facilities has been enhanced
	considerably.  See the manual for details.

	* The -tMACRO option is added, marks MACRO for tracing as soon
	as it is defined.

	* Builtins are traced after renaming iff they were before.

	* Named files can now be undiverted.

	* The -Nnum option can be used to increase the number of
	divertions available.

	* Calling changecom without arguments now disables all comment
	handling.

	* The function m4_patsubst() is now consistently declared
	static.

	* A bug in dnl is fixed.

	* A bug in the multi-character quoting code is fixed.

	* Several typos in the manual has been corrected.  More probably
	persist.

	* The m4.info file is now installed along with the program.

1990-11-15  René Seindal <seindal@diku.dk>

	* Updated and enhanced version.  Release 0.75, manual 0.07.

	* Implemented search path for include files (-I option and
	M4PATH envronment variable).

	* Implemented builtin "format" for printf-like formatting.

	* Implemented builtin "regexp" for searching for regular
	expressions.

	* Implemented builtin "patsubst" for substitution with regular
	expressions.

	* Implemented builtin "esyscmd", which expands to a shell
	commands output.

	* Implemented "__file__" and "__line__" for use in error
	messages.

	* Implemented character ranges in "translit".

	* Implemented control over debugging output.

	* Implemented multi-character quotes.

	* Implemented multi-character comment delimiters.

	* Changed predefined macro "gnu" to "__gnu__".

	* Changed predefined macro "unix" to "__unix__", when the -G
	option is not used.  With -G, "unix" is still defined.

	* Changed "shift", "$@" and "$*" to not insert spaces afters
	commas.

	* Added program name to error messages.

	* Fixed two missing null bytes bugs.

1990-01-22  René Seindal <seindal@diku.dk>

	* Initial beta release.  Release 0.50, manual 0.05.


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