path: root/tests/local.at

# M4 macros used in building Autoconf test suites.        -*- Autotest -*-

# Copyright (C) 2000-2017, 2020 Free Software Foundation, Inc.

# This program is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program.  If not, see <https://www.gnu.org/licenses/>.

m4_version_prereq([2.57])

# Used in many tests.
m4_pattern_allow([^AS_EXIT$])
m4_pattern_allow([^m4_(define|shift)$])

# Programs this package provides
AT_TESTED([autom4te autoconf autoheader autoupdate autoreconf ifnames])

# System-provided programs that this package relies on
AT_TESTED([$PERL $M4])

# Enable colored test output.
AT_COLOR_TESTS

# Sanitize the environment used for tests.
AT_PREPARE_TESTS(
[# MAKEFLAGS should not be inherited from the parent environment.
AS_UNSET([MAKEFLAGS])

# We do not want to read any external config.site file.
# If CONFIG_SITE is not set, autoconf will look for config.site in
# $prefix/share and $prefix/etc.
AS_IF([test -e nonexistent],
  [AS_ERROR([something named 'nonexistent' exists in the test directory])])
CONFIG_SITE=`pwd`/nonexistent/config.site
export CONFIG_SITE

# Ensure MAKE is set to a useful value.  Unlike the above, we *do*
# want to inherit this variable from the parent environment and/or
# our command line.
: "${MAKE=make}"
export MAKE
])



## ---------------- ##
## Utility macros.  ##
## ---------------- ##

# AT_CMP(FILE-1, FILE-2)
# ----------------------
# Check FILE-1 and FILE-2 for equality, like `cmp FILE-1 FILE-2'.
m4_define([AT_CMP],
[m4_ifval([$2],, [m4_fatal([AT_CMP takes two arguments.])])[]dnl
AT_CHECK([$at_diff "$1" "$2"])
])# AT_CMP


## ---------------- ##
## Testing syntax.  ##
## ---------------- ##

# AT_CHECK_SHELL_SYNTAX(PROGRAM)
# ------------------------------
# If the shell handles `-n' well, use it to check the syntax of PROGRAM;
# otherwise, do nothing.  ksh93 -n also spits outs loads of warnings
# about older constructs, but we don't care about the warnings.
m4_define([AT_CHECK_SHELL_SYNTAX],
[AT_SKIP_IF([test "$SHELL_N" = none])
AT_CHECK(["$SHELL_N" -n $1], [], [], [ignore])])

m4_define([AT_CHECK_PERL_SYNTAX],
[AT_CHECK([autom4te_perllibdir=$abs_top_srcdir/lib $PERL -c "$abs_top_builddir"/bin/$1],
          0, [], [ignore])])

## ------------------ ##
## Testing autom4te.  ##
## ------------------ ##


# AT_CHECK_M4(COMMAND, [EXIT-STATUS = 0], STDOUT, STDERR)
# -------------------------------------------------------
# If stderr is specified, normalize the observed stderr.
# This (using GNU M4 1.4.6)
#
#  /usr/local/bin/m4:script.4s:1: cannot open `foo': No such file or directory
#  autom4te: /usr/local/bin/m4 failed with exit status: 1
#
# or this (GNU M4 1.4.11)
#
#  /usr/local/bin/m4:script.4s:1: include: cannot open `foo': No such file or directory
#  autom4te: /usr/local/bin/m4 failed with exit status: 1
#
# or this (GNU M4 1.4 installed as gm4)
#
#  script.4s:1: /usr/local/bin/gm4: Cannot open foo: No such file or directory
#  autom4te: /usr/local/bin/gm4 failed with exit status: 1
#
# or this (GNU M4 1.4.13 installed as m4-1.4.13):
#
#  /usr/bin/m4-1.4.13:script.4s:1: include: cannot open `foo': No such file or directory
#  autom4te: /usr/bin/m4-1.4.13 failed with exit status: 1
#
# becomes
#
#  m4:script.4s:1: cannot open `foo': No such file or directory
#  autom4te: m4 failed with exit status: 1
#
# Also, this
#
#  configure.ac:6: warning: The macro `AC_LANG_SAVE' is obsolete.
#  configure.ac:6: You should run autoupdate.
#  ../../lib/autoconf/lang.m4:125: AC_LANG_SAVE is expanded from...
#  configure.ac:6: the top level
#
# becomes
#
#  configure.ac:6: warning: The macro `AC_LANG_SAVE' is obsolete.
#  configure.ac:6: You should run autoupdate.
#  lang.m4: AC_LANG_SAVE is expanded from...
#  configure.ac:6: the top level
#
# We use the following sed patterns:
#
#     (m4): ?(file): ?(line):
# or  (file): ?(line): ?(m4):
# to  m4:(file):(line):
#
# and
#     m4:(file):(line): Cannot open foo:
# or  m4:(file):(line): include: cannot open `foo':
# to  m4:(file):(line): cannot open `foo':
#
# and
#     autom4te: [^ ]m4
# or  autom4te: [^ ]m4.exe
# to  autom4te: m4
#
# and
#     (path)/(basename).m4: ?(line): (message)
# to  (basename).m4: (message)
#
# Moreover, DJGPP error messages include the error code in brackets;
# remove the error code during normalization.
#
m4_define([AT_CHECK_M4],
[AT_CHECK([$1], [$2], [$3],
          m4_case([$4], [], [], [ignore], [ignore], [stderr]))
m4_case([$4], [], [], [ignore], [],
[AT_CHECK([[mv stderr stderr-raw &&
   sed 's/^[^:]*m4[-.ex0-9]*: *\([^:]*:\) *\([0-9][0-9]*: \)/m4:\1\2/
	s/^\([^:]*:\) *\([0-9][0-9]*:\)[^:]*m4[-.ex0-9]*: /m4:\1\2 /
	s/: C\(annot open \)\([^`:]*\):/: c\1`\2'\'':/
	s/: include:\( cannot open\)/:\1/
	s/^autom4te: [^ ]*m4[.ex]* /autom4te: m4 /
	s/^autom4te: error: [^ ]*m4[.ex]* /autom4te: error: m4 /
        s!^.*/\([^/][^/]*\)\.m4: *[0-9][0-9]*: *!\1.m4: !
        s!^.*/\([^/][^/]*\)\.m4: *[0-9][0-9]*: *[0-9][0-9]*: *!\1.m4: !
	s/ (E[A-Z]*)$//
    ' stderr-raw >&2]], [0], [], [$4])])
])

# AT_CHECK_AUTOM4TE(FLAGS, [EXIT-STATUS = 0], STDOUT, STDERR)
# -----------------------------------------------------------
m4_define([AT_CHECK_AUTOM4TE],
[AT_CHECK_M4([autom4te $1], [$2], [$3], [$4])])



## ----------------- ##
## Testing M4sugar.  ##
## ----------------- ##


# AT_DATA_M4SUGAR(FILE-NAME, CONTENTS)
# ------------------------------------
# Escape the invalid tokens with @&t@.
m4_define([AT_DATA_M4SUGAR],
[AT_DATA([$1],
[m4_bpatsubst([$2], [\(@.\)\(.@\)\|\(m4\)\(_\)\|\(d\)\(nl\)],
              [\1\3\5@&t@\2\4\6])])])


# AT_CHECK_M4SUGAR(FLAGS, [EXIT-STATUS = 0], STDOUT, STDERR)
# ----------------------------------------------------------
m4_define([AT_CHECK_M4SUGAR],
[AT_KEYWORDS([m4sugar])
AT_CHECK_AUTOM4TE([--language=m4sugar script.4s -o script $1],
	           [$2], [$3], [$4])])



## -------------- ##
## Testing M4sh.  ##
## -------------- ##


# AT_DATA_M4SH(FILE-NAME, CONTENTS)
# ---------------------------------
# Escape the invalid tokens with @&t@.
m4_define([AT_DATA_M4SH],
[AT_DATA([$1],
[m4_bpatsubst([$2], [\(@.\)\(.@\)\|\(m4\|AS\)\(_\)\|\(d\)\(nl\)],
              [\1\3\5@&t@\2\4\6])])])


# AT_CHECK_M4SH(FLAGS, [EXIT-STATUS = 0], STDOUT, STDERR)
# -------------------------------------------------------
m4_define([AT_CHECK_M4SH],
[AT_CHECK_AUTOM4TE([--language=m4sh script.as -o script $1],
	           [$2], [$3], [$4])])



## ------------------ ##
## Testing Autoconf.  ##
## ------------------ ##


# AT_DATA_AUTOCONF(FILE-NAME, CONTENTS)
# -------------------------------------
# Escape the invalid tokens with @&t@.
m4_define([AT_DATA_AUTOCONF],
[AT_DATA([$1],
[m4_bpatsubst([$2], [\(@.\)\(.@\)\|\(m4\|AS\|AC\)\(_\)\|\(d\)\(nl\)],
              [\1\3\5@&t@\2\4\6])])])



# AT_CONFIGURE_AC(BODY)
# ---------------------
# Create a full configure.ac running BODY, with a config header set up,
# AC_OUTPUT, and environment checking hooks.
m4_define([AT_CONFIGURE_AC],
[AT_DATA([configure.ac],
[[AC_INIT
AC_CONFIG_HEADERS(config.h:config.hin)
AC_STATE_SAVE(before)]
$1
[AC_OUTPUT
AC_STATE_SAVE(after)
]])
cp "$abs_top_srcdir/build-aux/install-sh" \
   "$abs_top_srcdir/build-aux/config.guess" \
   "$abs_top_srcdir/build-aux/config.sub" .
cp "$abs_top_srcdir/tests/statesave.m4" aclocal.m4
])# AT_CONFIGURE_AC


# AT_CHECK_AUTOCONF(ARGS, [EXIT-STATUS = 0], STDOUT, STDERR)
# ----------------------------------------------------------
# We always use "--force", to prevent problems with timestamps if the testsuite
# were running too fast.
m4_define([AT_CHECK_AUTOCONF],
[AT_CHECK_M4([autoconf --force $1], [$2], [$3], [$4])
if test -s configure && test "$SHELL_N" != none; then
  AT_CHECK_SHELL_SYNTAX([configure])
fi
])


# AT_CHECK_AUTOHEADER(ARGS, EXPECTED_TMPLS, [EXIT-STATUS = 0], STDOUT, STDERR)
# ----------------------------------------------------------------------------
# EXPECTED_TMPLS is a whitespace-separated list of template
# definitions that should appear in the generated config.hin.
# The stock definitions made by AC_INIT are also checked for.
# If EXPECTED_TMPLS is the single word `ignore', or if the
# expected exit status is not 0, this test is skipped.
m4_define([AT_CHECK_AUTOHEADER],
[AT_CHECK_M4([autoheader $1], [$3], [$4], [$5])
m4_if(m4_strip([$2]), [ignore], [],
  [m4_if(m4_default_nblank([$3], [0]), [0], [dnl
if test -f config.h.in
then config_h_in=config.h.in
elif test -f config.hin
then config_h_in=config.hin
else AT_FAIL_IF([: "Cannot find autoheader template file"])
fi
m4_set_add_all([ah_expected_tmpls],
  [PACKAGE_BUGREPORT],
  [PACKAGE_NAME],
  [PACKAGE_STRING],
  [PACKAGE_TARNAME],
  [PACKAGE_URL],
  [PACKAGE_VERSION])dnl
m4_map_args_w([$2],
  [m4_set_add([ah_expected_tmpls],], [)])dnl
AT_DATA([expout.in],[m4_set_dump([ah_expected_tmpls],[
])
])
AT_CHECK([sort -o expout expout.in])
AT_CHECK([[sed -ne 's/^[	 ]*#[	 ]*undef[	 ][	 ]*//p' \
           $config_h_in | sort]],
  [0], [expout], [])
AS_UNSET([config_h_in])
])])])


# AT_CHECK_CONFIGURE(END-COMMAND,
#                    [EXIT-STATUS = 0],
#                    [STDOUT = IGNORE], STDERR)
# ---------------------------------------------
# `abs_top_srcdir' is needed so that `./configure' finds install-sh.
# Using --srcdir is more expensive.
m4_define([AT_CHECK_CONFIGURE],
[AT_CAPTURE_FILE([config.log])[]dnl
 AT_CHECK([./configure $configure_options $1],
	  [$2],
	  m4_default([$3], [ignore]), [$4])])


# AT_CHECK_ENV
# ------------
# Check that the full configure run remained in its variable name space,
# and cleaned up tmp files.
#
# Perhaps grep -E is not supported, or perhaps it chokes on such a big regex.
# In this case just don't pay attention to the env.  It would be great
# to keep the error message but we can't: that would break AT_CHECK.
#
# FreeBSD sh may intermingle the trace output from the egrep and grep
# commands in the pipe, so turn off tracing for these.
#
# Some tests might exit prematurely when they find a problem, in
# which case `env-after' is probably missing.  Don't check it then.
#
# Here are the variables `configure' may modify during execution:
# - ^as_
#   M4sh's shell name space.
# - ^ac_
#   Autoconf's shell name space.
# - prefix and exec_prefix
#   are kept undefined (NONE) until AC_OUTPUT which then sets them to
#   `/usr/local' and `${prefix}' for make.
# - (host|build|target)(_(alias|cpu|vendor|os))?
#   Set by AC_CANONICAL_(HOST|BUILD|TARGET).
# - cross_compiling
#   Set by AC_INIT.
# - interpval
#   Set by AC_SYS_INTERPRETER.
# - CONFIG_STATUS and DEFS
#   Set by AC_OUTPUT.
# - AC_SUBST'ed variables
#   (FIXME: Generate a list of these automatically.)
# - _|@|.[*#?$].|argv|ARGC|LINENO|OLDPWD|PIPESTATUS|RANDOM|SECONDS
#   |START_TIME|ToD|_AST_FEATURES
#   Some variables some shells use and change.
#   `.[*#?$].' catches `$#' etc. which are displayed like this:
#      | '!'=18186
#      | '#'=0
#      | '$'=6908
#
m4_defun([AT_CHECK_ENV],
[m4_require([_AT_CHECK_ENV])]dnl
[AT_CHECK([ath_fn_check_env])])

m4_defun([_AT_CHECK_ENV],
[AT_TEST_HELPER_FN([check_env], [],
[Compare the directory and environment state both before and after a run,
and return non-zero status if they differ inappropriately.],
[# Compare directory listings.
test -f state-ls.before ||
  AS_ERROR([state-ls.before not present])
test -f state-ls.after \
  && { $at_diff state-ls.before state-ls.after || return 1; }
# Compare variable space dumps.
if test -f state-env.before && test -f state-env.after; then
  set +x
  grep_failed=false
  for act_file in state-env.before state-env.after
  do
    ($EGREP -v '^(m4_join([|],
      [a[cs]_.*],
      [(exec_)?prefix|DEFS|CONFIG_STATUS],
      [CC|CFLAGS|CPP|GCC|CXX|CXXFLAGS|CXXCPP|GXX|F77|FFLAGS|FLIBS|G77],
      [ERL|ERLC|ERLCFLAGS|ERLANG_PATH_ERL|ERLANG_ROOT_DIR|ERLANG_LIB_DIR],
      [ERLANG_LIB_DIR_.*|ERLANG_LIB_VER_.*|ERLANG_INSTALL_LIB_DIR],
      [ERLANG_INSTALL_LIB_DIR_.*|ERLANG_ERTS_VER|OBJC|OBJCPP|OBJCFLAGS],
      [OBJCXX|OBJCXXCPP|OBJCXXFLAGS],
      [GOC|GOFLAGS],
      [OPENMP_(C|CXX)FLAGS],
      [LIBS|LIB@&t@OBJS|LTLIBOBJS|LDFLAGS],
      [INSTALL(_(DATA|PROGRAM|SCRIPT))?],
      [EXEEXT|OBJEXT],
      [CYGWIN|EMXOS2|ISC|MINGW32|MINIX|MSYS|XENIX],
      [X_(CFLAGS|(EXTRA_|PRE_)?LIBS)|x_(includes|libraries)|(have|no)_x],
      [(host|build|target)(_(alias|cpu|vendor|os))?],
      [cross_compiling|U],
      [interpval|PATH_SEPARATOR],
      [GFC|F77_DUMMY_MAIN|f77_(case|underscore)],
      [FC(_DUMMY_MAIN|FLAGS|LIBS|FLAGS_[fF]|_MODEXT|_MODINC|_MODOUT|_DEFINE)?],
      [ALLOCA|GETLOADAVG_LIBS|KMEM_GROUP|NEED_SETGID|POW_LIB],
      [AWK|LEX|LEXLIB|LEX_OUTPUT_ROOT|LN_S|M4|MKDIR_P|RANLIB|SET_MAKE|YACC],
      [GREP|[EF]GREP|SED],
      [[_@]|.[*@%:@?$].],
      [argv|ARGC|LINENO|BASH_ARGC|BASH_ARGV|OLDPWD|PIPESTATUS|RANDOM],
      [SECONDS|START_TIME|ToD|_AST_FEATURES]))=' \
     $act_file ||
       test $? -eq 1 || echo failed >&2
    ) 2>stderr-$act_file |
      # There may be variables spread on several lines; remove latter lines.
      $GREP '^m4_defn([m4_re_word])=' >clean-$act_file ||
        test $? -eq 1 || grep_failed=:
    test -s stderr-$act_file && grep_failed=:
  done
  $at_traceon
  $grep_failed || $at_diff clean-state-env.before clean-state-env.after
fi
])])


# AT_CONFIG_CMP(VAR-FILE-A, VAR-FILE-B, [EXTRA-VARIANCE])
# -------------------------------------------------------
# Check the outcomes of two configure runs for equality by comparing dumps of
# their shell variables.  VAR-FILE-A and VAR-FILE-B are two `set'-style shell
# variable space dumps.
#
# We permit variance between runs in the following shell variables:
# - ^as_
#   M4sh's shell name space.
# - ^ac_, excluding ^ac_cv_
#   Autoconf's private shell name space.
# - Variables with unstable values in at least some shells:
#   - OLDPWD [bash, zsh]
#   - PPID [bash, zsh]
#   - RANDOM [bash, zsh]
#   - SECONDS [bash, zsh]
#   - START_TIME [NetBSD sh]
#   - ToD [NetBSD sh]
#   - '$' [zsh]
#   - argv [zsh]
#   - ARGC [zsh]
#   - BASH_ARGC [bash]
#   - BASH_ARGV [bash]
#   - LINENO [Posix]
#   - _AST_FEATURES [ksh93]
# - Optionally, variables that are expected to vary in a particular test.
#   This is controlled by the EXTRA-VARIANCE argument, which is a
#   whitespace-separated sequence of tokens.  Each token means to ignore
#   one or more additional variables and/or rename some variables, as follows:
#
#   cross: ignore cross_compiling
#   cxx: ignore all of:
#     - CC, CPP, CCC, CXX, CXXCPP, CFLAGS, CXXFLAGS, GCC, GXX
#     - ac_cv_env_(any of the above)_(set|value)
#     - ac_cv_c_compiler_gnu, ac_cv_cxx_compiler_gnu
#     - ac_cv_c_decl_report, ac_cv_cxx_decl_report
#     - ac_cv_prog_c_*, ac_cv_prog_cxx_*,
#     - ac_cv_prog_(ac_ct_)?(CC|CXX|CPP|CXXCPP)
#     + other ac_cv_c_* are renamed to ac_cv_cxx_*
#     + OPENMP_CFLAGS is renamed to OPENMP_CXXFLAGS
#   vary:NAME (where NAME is any identifier): ignore ac_cv_NAME
#
# Furthermore, it is okay for a non-cache variable initialized to empty in one
# run to be unset in another run.  This happens when, for example, cache update
# code tries a number of values in LIBS and eventually restores LIBS to its
# original value. If LIBS was previously unset, it will have become set and
# empty.  (OTOH, cache variables indicate the result of the test even if they
# are empty, so we have to be strict about them.)
#
# Lines that do not look like `foo=bar' are probably latter lines of
# multiline values; trim them.
m4_define([AT_CONFIG_CMP],
[for act_file in $1 $2
do
  $SED '/^ac_cv_/ b skip
	/^m4_defn([m4_re_word])=./ !d
	/^[[^=]]*='\'''\''$/ d
	/^a[[cs]]_/ d
	: skip
	/^OLDPWD=/ d
	/^PPID=/ d
	/^RANDOM=/ d
	/^SECONDS=/ d
	/^START_TIME=/ d
	/^ToD=/ d
	/'\'\\\$\''=/ d
	/^argv=/ d
	/^ARGC=/ d
	/^BASH_ARGC=/ d
	/^BASH_ARGV=/ d
	/^LINENO=/ d
	/^_AST_FEATURES=/ d
m4_map_args_w([$3], [_AT_CONFIG_CMP_PRUNE(], [)])dnl
' < $act_file > at_config_vars-$act_file
done
AT_CMP([at_config_vars-$1], [at_config_vars-$2])[]dnl
])# AT_CONFIG_CMP

# _AT_CONFIG_CMP_PRUNE(TOKEN)
# ---------------------------
# Subroutine of AT_CONFIG_CMP which implements the extra-variance rules
# described above.  Expands to additional sed commands to be inserted in
# the program above.
# Note for future readers: not all sed implementations allow alternations
# in regexes (e.g. /^ac_cv_env_CC_\(set\|value\)=/ would not be portable).
m4_define([_AT_CONFIG_CMP_PRUNE],
[m4_bmatch([$1],
  [^cross$],
[	/^cross_compiling=/ d
],
  [^cxx$],
[	/^CC=/ d
	/^CPP=/ d
	/^CCC=/ d
	/^CXX=/ d
	/^CXXCPP=/ d
	/^CFLAGS=/ d
	/^CXXFLAGS=/ d
	/^GCC=/ d
	/^GXX=/ d
	/^ac_cv_env_CC_set=/ d
	/^ac_cv_env_CC_value=/ d
	/^ac_cv_env_CPP_set=/ d
	/^ac_cv_env_CPP_value=/ d
	/^ac_cv_env_CFLAGS_set=/ d
	/^ac_cv_env_CFLAGS_value=/ d
	/^ac_cv_env_GCC_set=/ d
	/^ac_cv_env_GCC_value=/ d
	/^ac_cv_env_CCC_set=/ d
	/^ac_cv_env_CCC_value=/ d
	/^ac_cv_env_CXX_set=/ d
	/^ac_cv_env_CXX_value=/ d
	/^ac_cv_env_CXXCPP_set=/ d
	/^ac_cv_env_CXXCPP_value=/ d
	/^ac_cv_env_CXXFLAGS_set=/ d
	/^ac_cv_env_CXXFLAGS_value=/ d
	/^ac_cv_env_GXX_set=/ d
	/^ac_cv_env_GXX_value=/ d
	/^ac_cv_prog_CC=/ d
	/^ac_cv_prog_CXX=/ d
	/^ac_cv_prog_CPP=/ d
	/^ac_cv_prog_CXXCPP=/ d
	/^ac_cv_prog_ac_ct_CC=/ d
	/^ac_cv_prog_ac_ct_CXX=/ d
	/^ac_cv_prog_ac_ct_CPP=/ d
	/^ac_cv_prog_ac_ct_CXXCPP=/ d
	/^ac_cv_c_compiler_gnu=/ d
	/^ac_cv_cxx_compiler_gnu=/ d
	/^ac_cv_c_decl_report=/ d
	/^ac_cv_cxx_decl_report=/ d
	/^ac_cv_prog_c_@<:@^=@:>@*=/ d
	/^ac_cv_prog_cc_@<:@^=@:>@*=/ d
	/^ac_cv_prog_cxx_@<:@^=@:>@*=/ d
	s/^ac_cv_c_/ac_cv_cxx_/
	s/^OPENMP_CFLAGS=/OPENMP_CXXFLAGS=/
],
  [^vary:],
[	/^ac_cv_]m4_bpatsubsts([$1], [\<vary:], [])[=/ d
],
  [m4_fatal([unrecognized AT_CONFIG_CMP variance token: "$1"])])])


# AT_DEFINES_CMP(CONFIG-H-A, CONFIG-H-B, [EXTRA-VARIANCE])
# --------------------------------------------------------
# Check the outcomes of two configure runs for equality by comparing the
# config.h headers they produced.  Optionally, ignore changes to particular
# defines, under the control of the EXTRA-VARIANCE argument, which is a
# whitespace-separated sequence of tokens. Each token means to ignore
# one or more additional defines, as follows:
#   vary:NAME (where NAME is any identifier): ignore #define/#undef NAME
m4_define([AT_DEFINES_CMP],
[m4_ifblank([$3], [AT_CMP([$1], [$2])],
[for act_file in $1 $2
do
  $SED '
m4_map_args_w([$3], [_AT_DEFINES_CMP_PRUNE(], [)])
' < $act_file > at_defines-$act_file
done
AT_CMP([at_defines-$1], [at_defines-$2])[]dnl
])])# AT_DEFINES_CMP


# _AT_DEFINES_CMP_PRUNE(TOKEN)
# ---------------------------
# Subroutine of AT_DEFINES_CMP which implements the extra-variance rules
# described above.  Expands to one or more sed commands.
# After quadrigraph replacement, each sed command group will be
#   /#define macro_name[ (]/ d ;#)
#   /#undef macro_name[ (]/ d ;#)
# AC_DEFINE never emits tabs or puts whitespace between '#' and
# 'define' or 'undef', so this is sufficient.
m4_define([_AT_DEFINES_CMP_PRUNE],
[m4_bmatch([$1],
  [^vary:],
[	/@%:@define ]m4_bpatsubsts([$1], [\<vary:], [])dnl
[@<:@ @{:@@:>@/ d ;@%:@@:}@
	/@%:@undef ]m4_bpatsubsts([$1], [\<vary:], [])dnl
[@<:@ @{:@@:>@/ d ;@%:@@:}@
],
  [m4_fatal([unrecognized AT_DEFINES_CMP variance token: "$1"])])])


# AT_PRESERVE_CONFIG_STATUS(SUFFIX)
# ---------------------------------
# Copy the files 'state-env.after', 'config.h', 'config.log', and
# 'config.status' to names ending with SUFFIX, so they are not
# clobbered by a subsequent run of configure.
m4_define([AT_PRESERVE_CONFIG_STATUS],
[cp -f state-env.after state-env.$1
cp -f config.h config-h.$1
cp -f config.log config-log.$1
cp -f config.status config-status.$1
])


# AT_CHECK_DEFINES(CONTENT)
# -------------------------
# Verify that config.h, once stripped, is CONTENT.
# Stripping consists of keeping CPP lines (i.e. containing a hash),
# but those of automatically checked features (STDC_HEADERS etc.)
# and symbols (PACKAGE_...).
# AT_CHECK_HEADER is a better name, but too close from AC_CHECK_HEADER.
m4_define([AT_CHECK_DEFINES],
[AT_CHECK([[sed '/#/!d
/INTTYPES_H/d
/MEMORY_H/d
/PACKAGE_/d
/STDC_HEADERS/d
/STDINT_H/d
/STDIO_H/d
/STDLIB_H/d
/STRING_H/d
/STRINGS_H/d
/SYS_STAT_H/d
/SYS_TYPES_H/d
/UNISTD_H/d' config.h]],,
	  [$1])])


# AT_CHECK_AUTOUPDATE
# -------------------
m4_define([AT_CHECK_AUTOUPDATE],
[AT_CHECK([autoupdate $1], [$2], [$3], [$4])
])


# AT_CHECK_MAKE(MAKEARGS, DIRECTORY, EXIT-STATUS,
#               [STDOUT = IGNORE], [STDERR = IGNORE])
# ---------------------------------------------------------------
# Run make in DIRECTORY (default `.'), passing MAKEARGS on the command
# line.  EXIT-STATUS, STDOUT, and STDERR are as for AT_CHECK.
# The environment variable MAKE is honored if present.
# The environment variable MAKEFLAGS is *cleared*.
# If EXIT-STATUS is 1, an exit status of either 1 or 2 is considered
# an acceptable result, because there are situations where BSD make will
# exit with status 1 but GNU make will instead exit with status 2.
m4_define([AT_CHECK_MAKE],
[AT_CHECK(
  m4_if(m4_default([$2], [.]), [.], [],
        [cd "$2" && ])[$][MAKE]m4_ifnblank([$1],[ $1])[]m4_if([$3], [1], [[
dnl pacify editors that don't understand sh case: ((
  case $? in 1|2) exit 1;; *) exit $?;; esac]]),
  [$3],
  m4_default([$4], [ignore]),
  m4_default([$5], [ignore]))
])


# _AT_CHECK_AC_MACRO(AC-BODY, [PRE-TESTS], [AUTOCONF-FLAGS])
# ----------------------------------------------------------
# Create a minimalist configure.ac running the macro named
# NAME-OF-THE-MACRO, check that autoconf runs on that script,
# and that the generated configure script runs without error.
m4_define([_AT_CHECK_AC_MACRO],
[AT_CONFIGURE_AC([$1])
$2
AT_CHECK_AUTOCONF([$3])
AT_CHECK_AUTOHEADER([$3], [ignore])
AT_CHECK_CONFIGURE
AT_CHECK_ENV
])# _AT_CHECK_AC_MACRO

# AT_CHECK_CONFIGURE_AC(NAME, AC-BODY, [AUTOCONF-FLAGS],
#                       [PRE-TESTS], [POST-TESTS])
# -----------------------------------------------------
# Shorthand for a complete test "group" consisting of a single
# invocation of _AT_CHECK_AC_MACRO, possibly with some additional
# tests executed before and after.
m4_define([AT_CHECK_CONFIGURE_AC],
[AT_SETUP([$1])
_AT_CHECK_AC_MACRO([$2], [$4], [$3])
$5
AT_CLEANUP
])

# AT_CHECK_MACRO(MACRO, [MACRO-USE], [ADDITIONAL-CMDS],
#                [AUTOCONF-FLAGS], [TEST-PARAMETERS], [PRETEST-CMDS])
# -----------------------------------------------------
# Create a minimalist configure.ac running the macro named MACRO
# (using the code in MACRO-USE if that argument is not empty,
# otherwise a bare invocation of MACRO with no arguments),
# check that autoconf runs on that script,
# and that the generated configure script runs without error.
# AUTOCONF-FLAGS are passed to all invocations of autoconf.
#
# We always generate two variants of the minimalist configure.ac,
# with and without forcing the script into cross-compilation mode
# before executing MACRO-USE.  If a C++ compiler is available, we
# generate two more variants in which MACRO-USE is invoked while
# AC_LANG([C++]) is in effect; as before, one forces the script into
# cross-compilation mode and the other doesn't.  All variants of the
# generated configure script are run twice, once with an empty cache,
# and once with a cache primed by the previous run.
#
# All four (or eight, if C++ is available) runs are expected to
# produce the same results, except for the value of 'cross_compiling'
# and differences due to running AC_PROG_CXX instead of AC_PROG_CC.
# (See AT_CONFIG_CMP for details.)
#
# If ADDITIONAL-CMDS are present, they are executed after the first
# pair of tests (with the C compiler, in native mode).
#
# If PRETEST-CMDS are present, they are executed immediately after
# AT_SETUP; use this if the test needs to be skipped conditionally,
# for example.
#
# If TEST-PARAMETERS are present, they should be a space-separated
# list of modifiers to how the test is carried out.  Currently
# the following modifiers are defined:
#
#   - `no-cross': Don't test this macro in cross-compilation mode.
#     This is for macros that use AC_RUN_IFELSE, and therefore, when
#     cross-compiling, they either crash or give a `best guess' answer
#     that may be wrong.
#
#   - `cxx_cv_varies:NAME': The value of the cache variable ac_cv_NAME
#     may legitimately vary between the C tests and the C++ tests.
#
#   - `cxx_define_varies:NAME' The value of the AC_DEFINEd macro NAME
#     may legitimately vary between the C tests and the C++ tests.
m4_define([AT_CHECK_MACRO],
[AT_SETUP([$1])
m4_n([$6])dnl

# C compiler, native mode.
AT_CONFIGURE_AC([m4_default([$2], [$1])])
AT_CHECK_AUTOCONF([$4])
AT_CHECK_AUTOHEADER([$4], [ignore])

cp -f configure.ac configure-ac.c-native
cp -f configure configure.c-native
cp -f config.hin config-hin.c-native

AT_CHECK_CONFIGURE([-C])
AT_PRESERVE_CONFIG_STATUS([c-native-r1])
AT_CHECK_ENV
AT_CHECK_CONFIGURE([-C])
AT_PRESERVE_CONFIG_STATUS([c-native-r2])
AT_CHECK_ENV

AT_DEFINES_CMP([config-h.c-native-r1], [config-h.c-native-r2])
AT_CONFIG_CMP([state-env.c-native-r1], [state-env.c-native-r2])

m4_n([$3])dnl
m4_bmatch([$5], [\<no-cross\>], [], [dnl

# C compiler, cross-compilation mode.
rm -rf config.cache autom4te.cache
AT_CONFIGURE_AC(
[cross_compiling=yes
ac_tool_warned=yes
m4_default([$2], [$1])])
AT_CHECK_AUTOCONF([$4])
AT_CHECK_AUTOHEADER([$4], [ignore])

cp -f configure.ac configure-ac.c-cross
cp -f configure configure.c-cross
cp -f config.hin config-hin.c-cross

AT_CHECK_CONFIGURE([-C])
AT_PRESERVE_CONFIG_STATUS([c-cross-r1])
AT_CHECK_ENV
AT_DEFINES_CMP([config-h.c-native-r1], [config-h.c-cross-r1])
AT_CONFIG_CMP([state-env.c-native-r1], [state-env.c-cross-r1], [cross])

AT_CHECK_CONFIGURE([-C])
AT_PRESERVE_CONFIG_STATUS([c-cross-r2])
AT_CHECK_ENV
AT_DEFINES_CMP([config-h.c-native-r1], [config-h.c-cross-r2])
AT_CONFIG_CMP([state-env.c-native-r1], [state-env.c-cross-r2], [cross])
])dnl

# To save time, skip the C++-mode tests for any macro that did not
# transitively require AC_PROG_CC; it won't make any difference.
if grep '^CC=' state-env.c-native-r1 > /dev/null 2>&1; then

  # C++ compiler, native mode.
  rm -rf config.cache autom4te.cache
  AT_CONFIGURE_AC(
  [AC_LANG([C++])
  m4_default([$2], [$1])])

  # Autoconf may fail here because of an AC_LANG_ASSERT([C]); this
  # means the macro is specific to C and should not be tested with the
  # C++ compiler.
  AT_CHECK_AUTOCONF([$4], [ignore], [ignore], [stderr])
  if test -s stderr; then
    AT_CHECK([grep 'error: AC_LANG_ASSERT: current language is not C' stderr],
             [0], [ignore], [ignore])
  else
    AT_CHECK_AUTOHEADER([$4], [ignore])

    cp -f configure.ac configure-ac.cxx-native
    cp -f configure configure.cxx-native
    cp -f config.hin config-hin.cxx-native

    # If this configure pass fails with code 77, that means there is no
    # C++ compiler available; don't mark the entire test group skipped,
    # just skip the rest of the C++ testing.
    AT_CHECK_CONFIGURE([-C;
      status=$?
      if test $status -eq 77; then
        touch at-no-cxx
        exit 0
      else
        exit $status
      fi
    ])
    if test ! -f at-no-cxx; then
      AT_PRESERVE_CONFIG_STATUS([cxx-native-r1])
      AT_CHECK_ENV
      AT_DEFINES_CMP([config-h.c-native-r1], [config-h.cxx-native-r1],
                     _AT_FILTER_CXX_DEFINE_VARIES([$5]))
      AT_CONFIG_CMP([state-env.c-native-r1], [state-env.cxx-native-r1],
                    [cxx ]_AT_FILTER_CXX_CV_VARIES([$5]))

      AT_CHECK_CONFIGURE([-C])
      AT_PRESERVE_CONFIG_STATUS([cxx-native-r2])
      AT_CHECK_ENV
      AT_DEFINES_CMP([config-h.cxx-native-r1], [config-h.cxx-native-r2])
      AT_CONFIG_CMP([state-env.cxx-native-r1], [state-env.cxx-native-r2])
m4_bmatch([$5], [\<no-cross\>], [], [dnl

      # Fourth run: C++ compiler, cross-compilation mode.

      rm -rf config.cache autom4te.cache
      AT_CONFIGURE_AC(
      [cross_compiling=yes
      ac_tool_warned=yes
      AC_LANG([C++])
      m4_default([$2], [$1])])
      AT_CHECK_AUTOCONF([$4])
      AT_CHECK_AUTOHEADER([$4], [ignore])

      cp -f configure.ac configure-ac.cxx-cross
      cp -f configure configure.cxx-cross
      cp -f config.hin config-hin.cxx-cross

      AT_CHECK_CONFIGURE([-C])
      AT_PRESERVE_CONFIG_STATUS([cxx-cross-r1])
      AT_CHECK_ENV
      AT_DEFINES_CMP([config-h.cxx-native-r1], [config-h.cxx-cross-r1])
      AT_CONFIG_CMP([state-env.cxx-native-r1], [state-env.cxx-cross-r1],
                    [cross])

      AT_CHECK_CONFIGURE([-C])
      AT_PRESERVE_CONFIG_STATUS([cxx-cross-r2])
      AT_CHECK_ENV
      AT_DEFINES_CMP([config-h.cxx-cross-r1], [config-h.cxx-cross-r2])
      AT_CONFIG_CMP([state-env.cxx-cross-r1], [state-env.cxx-cross-r2])
])dnl
    fi # C++ compiler available
  fi # macro can be used with C++
fi # C++ makes a difference

AT_CLEANUP
])# AT_CHECK_MACRO


# _AT_FILTER_CXX_CV_VARIES(TEST-PARAMETERS)
# ---------------------------------------------
# Subroutine of AT_CHECK_MACRO that expands to a sequence of
# zero or more `vary:NAME' tokens, one for each occurrence of
# `cxx_cv_varies:NAME' in TEST-PARAMETERS.
m4_define([_AT_FILTER_CXX_CV_VARIES],
[m4_map_args_w([$1], [_AT_FILTER_CXX_CV_VARY(], [)], [ ])])

m4_define([_AT_FILTER_CXX_CV_VARY],
[m4_bmatch([$1], [^cxx_cv_varies:],
  [m4_bpatsubsts([$1], [\<cxx_cv_varies:], [vary:])])])


# _AT_FILTER_CXX_DEFINE_VARIES(TEST-PARAMETERS)
# ---------------------------------------------
# Subroutine of AT_CHECK_MACRO that expands to a sequence of
# zero or more `vary:NAME' tokens, one for each occurrence of
# `cxx_define_varies:NAME' in TEST-PARAMETERS.
m4_define([_AT_FILTER_CXX_DEFINE_VARIES],
[m4_map_args_w([$1], [_AT_FILTER_CXX_DEFINE_VARY(], [)], [ ])])

m4_define([_AT_FILTER_CXX_DEFINE_VARY],
[m4_bmatch([$1], [^cxx_define_varies:],
  [m4_bpatsubsts([$1], [\<cxx_define_varies:], [vary:])])])


# AT_CHECK_AU_MACRO(MACRO, [MACRO-USE], [ADDITIONAL-CMDS],
#                   [AUTOCONF-FLAGS], [TEST-PARAMETERS])
# ------------------------
# Do all the tests that AT_CHECK_MACRO(...) would do.
#
# In addition, run autoupdate on configure.ac; afterward, verify that
# MACRO no longer appears in configure.ac, autoconf runs on the
# updated script, the configure script still runs without error, and
# the result of configuration is unchanged.
#
# Before running autoupdate, check for a -Wobsolete warning naming
# MACRO from configure.  After running autoupdate, *don't* check for
# the absence of -Wobsolete warnings, because many of autoupdate's
# edits leave the configure.ac author with some manual work to do, and
# indicate this by inserting an m4_warn message to be removed after
# the manual work is complete.
m4_define([AT_CHECK_AU_MACRO],
[AT_CHECK_MACRO([$1], [$2], [$3], [-Wno-obsolete $4], [$5])

AT_SETUP([autoupdating $1])
AT_KEYWORDS([autoupdate])

AT_CONFIGURE_AC([m4_default([$2], [$1])])

AT_CHECK_AUTOCONF([$4], 0, [], [stderr])
AT_CHECK([grep 'macro .$1. is obsolete' stderr], 0, [ignore], [ignore])
AT_CHECK_AUTOHEADER([-Wno-obsolete $4], [ignore])
AT_CHECK_CONFIGURE
AT_CHECK_ENV
AT_PRESERVE_CONFIG_STATUS([before-au])

rm config.hin
AT_CHECK_AUTOUPDATE([], 0, [], ignore)
AT_CHECK([grep '^$1$' configure.ac], 1)

AT_CHECK_AUTOCONF([-Wno-obsolete $4])
AT_CHECK_AUTOHEADER([-Wno-obsolete $4], [ignore])
AT_CHECK_CONFIGURE
AT_CHECK_ENV
AT_PRESERVE_CONFIG_STATUS([after-au])

AT_CMP([config-h.before-au], [config-h.after-au])
AT_CONFIG_CMP([state-env.before-au], [state-env.after-au])

AT_CLEANUP[]dnl
])# AT_CHECK_AU_MACRO



## ----------------------- ##
## Launch the test suite.  ##
## ----------------------- ##

AT_INIT