# Configure template for GNU Bison. -*-Autoconf-*- # # Copyright (C) 2001-2015, 2018-2022 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 . AC_PREREQ([2.71]) m4_pattern_forbid([^_?(gl_[A-Z]|AX_|BISON_)]) m4_pattern_allow([^BISON_USE_NLS$]) AC_INIT([GNU Bison], m4_esyscmd([build-aux/git-version-gen .tarball-version]), [bug-bison@gnu.org], [], [https://www.gnu.org/software/bison/]) AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2022]) AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR], [The copyright year for this package]) AC_CONFIG_AUX_DIR([build-aux]) AC_CONFIG_MACRO_DIR([m4]) # When we move to Automake 1.16, simplify examples/c/reccalc/local.mk. # Our CI build the packages on Bionic, which has only Automake 1.15. # # We want gnits strictness only when rolling a stable release. For # release candidates, we use version strings like 2.4.3_rc1, but gnits # doesn't like that, so we let the underscore disable gnits. Between # releases, we want to be able run make dist without being required to # add a bogus NEWS entry. In that case, the version string # automatically contains a dash, which we also let disable gnits. AM_INIT_AUTOMAKE([1.15 dist-lzip dist-xz nostdinc color-tests parallel-tests silent-rules] m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]], [gnu], [gnits])) AM_SILENT_RULES([yes]) AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h]) # Checks for the compiler. AC_PROG_CC AC_PROG_CXX # Gnulib (early checks). gl_EARLY # Gnulib uses '#pragma GCC diagnostic push' to silence some # warnings, but older gcc doesn't support this. AC_CACHE_CHECK([whether pragma GCC diagnostic push works], [lv_cv_gcc_pragma_push_works], [ save_CFLAGS=$CFLAGS CFLAGS='-Wunknown-pragmas -Werror' AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ #pragma GCC diagnostic push #pragma GCC diagnostic pop ]])], [lv_cv_gcc_pragma_push_works=yes], [lv_cv_gcc_pragma_push_works=no]) CFLAGS=$save_CFLAGS]) AC_LANG_PUSH([C++]) gl_WARN_ADD([-fno-exceptions], [NO_EXCEPTIONS_CXXFLAGS]) BISON_CXXSTD([98]) BISON_CXXSTD([03]) BISON_CXXSTD([11]) BISON_CXXSTD([14]) BISON_CXXSTD([17]) BISON_CXXSTD([20]) BISON_CXXSTD([2b]) AM_CONDITIONAL([ENABLE_CXX11], [test x"$CXX11_CXXFLAGS" != x]) AM_CONDITIONAL([ENABLE_CXX14], [test x"$CXX14_CXXFLAGS" != x]) AC_LANG_POP([C++]) AC_ARG_ENABLE([gcc-warnings], [ --enable-gcc-warnings turn on lots of GCC warnings (not recommended). Also, issue synclines from the examples/ to the corresponding source in the Texinfo doc.], [case $enable_gcc_warnings in yes|no) ;; *) AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);; esac], [enable_gcc_warnings=no]) AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes]) if test "$enable_gcc_warnings" = yes; then # -Wno-tautological-constant-out-of-range-compare for Clang 3.3 and # 3.4 on GNU/Linux that choke on intprops.h's INT_MULTIPLY_WRAPV, # etc. # # ICC: -wr188 # # 1669 warnings warnings_default = # ../src/complain.c(318): error #188: enumerated type mixed with another type # 1670 Wconflicts_sr | Wconflicts_rr | Wdeprecated | Wother; # 1671 ^ # 1672 # 1673../src/complain.c(393): error #188: enumerated type mixed with another type # 1674 warnings w = 1 << wbit; # 1675 ^ # # ICC: -wr3179 # # char const *usefulness # = rule_useless_in_grammar_p (&rules[r]) ? "useless-in-grammar" # : rule_useless_in_parser_p (&rules[r]) ? "useless-in-parser" # : "useful"; # # gives # # error #3179: deprecated conversion of string literal to char* (should be const char*) # # ICC: -wr2259 (that's in C, in spite of what the error messages which seems to be about C++). # error #2259: non-pointer conversion from "int" to "yybool={signed char}" may lose significant bits # yybool yynormal YY_ATTRIBUTE_UNUSED = yystackp->yysplitPoint == YY_NULLPTR; # ^ warn_common='-Wall -Wextra -Wcast-align -Wchar-subscripts -fparse-all-comments -Wdocumentation -Wformat -Wimplicit-fallthrough -Wmismatched-dealloc -Wnull-dereference -Wno-sign-compare -Wno-tautological-constant-out-of-range-compare -Wpointer-arith -Wshadow -Wstrict-aliasing -Wunused-but-set-variable -Wwrite-strings -wr188 -wr2259 -wr3179' warn_c='-Wbad-function-cast -Wmissing-prototypes -Wstrict-prototypes' warn_cxx='-Wextra-semi -Wnoexcept -Wsubobject-linkage -Wold-style-cast -Wundefined-func-template -Wweak-vtables' # Warnings for the test suite only. # # -fno-color-diagnostics: Clang's use of colors in the error # messages is confusing the tests looking at the compiler's output # (e.g., synclines.at). # # -Wno-keyword-macro: We use the "#define private public" dirty # trick in the test suite to check some private implementation # details for lalr1.cc. warn_tests='-Wundef -pedantic -Wconversion -Wdeprecated -Wsign-compare -Wsign-conversion -Wtautological-constant-out-of-range-compare -fno-color-diagnostics -Wno-keyword-macro' AC_LANG_PUSH([C]) # Clang supports many of GCC's -W options, but only issues warnings # on the ones it does not recognize. In that case, gl_WARN_ADD # thinks the option is supported, and unknown options are then added # to CFLAGS. But then, when -Werror is added in the test suite for # instance, the warning about the unknown option turns into an # error. # # This should be addressed by gnulib's gl_WARN_ADD, but in the # meanwhile, turn warnings about unknown options into errors in # CFLAGS, and restore CFLAGS after the tests. save_CFLAGS=$CFLAGS gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS]) # Accept this warning only if it is not too touchy (e.g., clang 3.3 # and 3.4). gl_WARN_ADD([-Wunreachable-code], [WARN_CFLAGS], [AC_LANG_PROGRAM([], [[if (sizeof (long) < sizeof (int)) return 1;]])]) for i in $warn_common $warn_c; do gl_WARN_ADD([$i], [WARN_CFLAGS]) done gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) # Warnings for the test suite, and maybe for bison if GCC is modern # enough. test $lv_cv_gcc_pragma_push_works = yes && AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"]) # Warnings for the test suite only. for i in $warn_tests -Wincompatible-pointer-types; do gl_WARN_ADD([$i], [WARN_CFLAGS_TEST]) done CFLAGS=$save_CFLAGS AC_LANG_POP([C]) AC_LANG_PUSH([C++]) save_CXXFLAGS=$CXXFLAGS gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS]) for i in $warn_common $warn_cxx; do gl_WARN_ADD([$i], [WARN_CXXFLAGS]) done # Accept this warning only if it is not too touchy (e.g., clang 3.3 # and 3.4). gl_WARN_ADD([-Wunreachable-code], [WARN_CXXFLAGS], [AC_LANG_PROGRAM([], [[if (sizeof (long) < sizeof (int)) return 1;]])]) gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS], [AC_LANG_PROGRAM([], [nullptr])]) # Before GCC6, the pragmas don't work well enough to neutralize # this warning. gl_WARN_ADD([-Wuseless-cast], [WARN_CXXFLAGS], [AC_LANG_PROGRAM([], [ #if defined __GNUC__ && ! defined __ICC && ! defined __clang__ && __GNUC__ < 6 syntax error #endif ])]) gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS]) # Warnings for the test suite only. for i in $warn_tests; do gl_WARN_ADD([$i], [WARN_CXXFLAGS_TEST]) done # Too many compilers complain about Flex generated code. gl_WARN_ADD([-Wno-error], [FLEX_SCANNER_CXXFLAGS]) # Clang++ deprecates compiling C. gl_WARN_ADD([-Wno-deprecated], [WNO_DEPRECATED_CXXFLAGS]) CXXFLAGS=$save_CXXFLAGS AC_LANG_POP([C++]) AC_DEFINE([lint], [1], [Define to 1 if the compiler is checking for lint.]) AH_VERBATIM([FORTIFY_SOURCE], [/* Enable compile-time and run-time bounds-checking, and some warnings, without upsetting glibc 2.15+. */ #if !defined _FORTIFY_SOURCE && defined __OPTIMIZE__ && __OPTIMIZE__ # define _FORTIFY_SOURCE 2 #endif ]) AC_DEFINE([GNULIB_PORTCHECK], [1], [Enable some gnulib portability checks.]) fi BISON_TEST_FOR_WORKING_C_COMPILER BISON_C_COMPILER_POSIXLY_CORRECT BISON_TEST_FOR_WORKING_CXX_COMPILER BISON_CXX_COMPILER_POSIXLY_CORRECT # D. AC_CHECK_PROGS([DC], [dmd]) AC_CHECK_PROGS([DCFLAGS], [-g]) AM_CONDITIONAL([ENABLE_D], [test x"$DC" != x]) # Java. gt_JAVACOMP([1.7], [1.7]) gt_JAVAEXEC AM_CONDITIONAL([ENABLE_JAVA], [test x"$CONF_JAVAC" != x && test x"$CONF_JAVA" != x]) AC_ARG_ENABLE([yacc], [AS_HELP_STRING([--disable-yacc], [do not build a yacc command or an -ly library])], , [enable_yacc=yes]) AM_CONDITIONAL([ENABLE_YACC], [test "$enable_yacc" = yes]) AC_CONFIG_FILES([src/yacc], [chmod +x src/yacc]) # Checks for programs. AM_MISSING_PROG([DOT], [dot]) AC_PROG_LEX if ! "$LEX_IS_FLEX" || test "X$LEX" = X:; then AC_MSG_WARN([bypassing lex because flex is required]) LEX=: fi AM_CONDITIONAL([FLEX_WORKS], [$LEX_IS_FLEX && $FLEX_SUPPORTS_HEADER_OPT]) AM_CONDITIONAL([FLEX_CXX_WORKS], [$LEX_IS_FLEX && $FLEX_SUPPORTS_HEADER_OPT && test $bison_cv_cxx_works = yes]) AC_PROG_YACC AC_PROG_RANLIB AC_PROG_GNU_M4 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.]) AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4 supports -g, otherwise to "".]) AC_PATH_PROG([PERL], [perl]) AM_MISSING_PROG([HELP2MAN], [help2man]) AC_PATH_PROG([XSLTPROC], [xsltproc]) AC_SUBST([XSLTPROC]) # Checks for header files. AC_CHECK_HEADERS_ONCE([locale.h]) # Checks for compiler characteristics. AC_C_INLINE # Gnulib (later checks). Putting them here rather than right after # gl_EARLY avoids some redundant checks. gl_INIT # We want ostream_printf and hyperlink support. gl_LIBTEXTSTYLE_OPTIONAL([0.20.5]) # Checks for library functions. AC_CHECK_FUNCS_ONCE([setlocale]) # Gettext. # We use gnulib, which is only guaranteed to work properly with the # latest Gettext. AM_GNU_GETTEXT([external], [need-ngettext]) AM_GNU_GETTEXT_VERSION([0.19]) BISON_I18N AC_CONFIG_FILES([gnulib-po/Makefile.in]) # Internationalized parsers. AC_CONFIG_FILES([runtime-po/Makefile.in]) # Autoconf macros for packages using internationalized parsers. aclocaldir='${datadir}/aclocal' AC_SUBST([aclocaldir]) # Create the benchmark script. AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl]) # Initialize the test suite. AC_CONFIG_TESTDIR(tests) AC_CONFIG_FILES([tests/atlocal]) AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison]) AC_CHECK_PROGS([VALGRIND], [valgrind]) # Use something simpler that $host_os to select our suppression file. uname=`uname` case $VALGRIND:$uname in '':*) ;; *:Darwin) # See README-hacking.md. VALGRIND=;; *:*) suppfile=build-aux/$uname.valgrind if test -f "$srcdir/$suppfile"; then AC_SUBST([VALGRIND_OPTS_SUPPRESSION], ["--suppressions=\$(abs_top_srcdir)/$suppfile"]) fi ;; esac AC_MSG_CHECKING([Valgrind suppression file]) AC_MSG_RESULT([$suppfile]) # Whether we cannot run the compiled bison. AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes]) # Build bistromathic if we have the lib and both readline/readline.h # and readline/history.h. AM_CONDITIONAL([ENABLE_BISTROMATHIC], [test "$gl_cv_lib_readline" != no && test "$ac_cv_header_readline_readline_h" = yes && test "$ac_cv_header_readline_history_h" = yes]) AM_MISSING_PROG([AUTOM4TE], [autom4te]) # Needed by tests/atlocal.in. AC_SUBST([GCC]) AC_CONFIG_FILES([Makefile po/Makefile.in doc/yacc.1]) # Fix LIBOBJS to give the Makefile the right file names. Otherwise # compilation works, but with unexpected file names, so clean rules don't # remove the actual files and distcheck fails. AC_CONFIG_COMMANDS_PRE([ case $am__api_version in 1.14*|1.15*) gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, lib/, lib/lib_libbison_a-,g'`;; *) gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, lib/, lib/libbison_a-,g'`;; esac ]) AC_OUTPUT