configure.ac - platform/external/bison - Git at Google

 # Configure template for GNU Bison.                   -*-Autoconf-*-
 #
 # Copyright (C) 2001-2012 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 <http://www.gnu.org/licenses/>.

 # In order for some versions of Sun Studio to compile our C++ test cases
 # correctly, we need Autoconf 2.64 or better to handle the restrict
 # keyword in at least string.h from gnulib.  We need Autoconf 2.68 or
 # better to avoid a typo in the `configure --help' entry for the YACC
 # environment variable.
 AC_PREREQ([2.68])
 m4_pattern_forbid([^gl_[A-Z]])

 AC_INIT([GNU Bison],
         m4_esyscmd([build-aux/git-version-gen .tarball-version]),
         [bug-bison@gnu.org])
 AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012])
 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])

 # Automake 1.10.3 and 1.11.1 fix a security flaw discussed here:
 #
 #   http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131
 #
 # To avoid 1.11, we make 1.11.1 the minimum version.
 #
 # 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([1.11.1 dist-xz 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_STDC
 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=$CFLAGS
   CFLAGS='-Wunknown-pragmas -Werror'
   AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
     #pragma GCC diagnostic push
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   ]])],
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   [lv_cv_gcc_pragma_push_works=no])
   CFLAGS=$save_CFLAGS])

 AC_ARG_ENABLE([gcc-warnings],
 [  --enable-gcc-warnings   turn on lots of GCC warnings (not recommended)],
 [case $enable_gcc_warnings in
    yes|no) ;;
    *)  AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
  esac],
               [enable_gcc_warnings=no])
 if test "$enable_gcc_warnings" = yes; then
   warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
     -Wformat -Wpointer-arith -Wwrite-strings'
   warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes'
   warn_cxx='-Wnoexcept'
   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])
   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.
   gl_WARN_ADD([-Wmissing-declarations], [WARN_CFLAGS_TEST])
   gl_WARN_ADD([-Wmissing-prototypes], [WARN_CFLAGS_TEST])
   test $lv_cv_gcc_pragma_push_works = yes &&
     AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"])

   # Warnings for the test suite only.
   gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
   gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST])
   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
   gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
               [AC_LANG_PROGRAM([], [nullptr])])
   gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
   # Warnings for the test suite only.
   gl_WARN_ADD([-Wundef], [WARN_CXXFLAGS_TEST])
   gl_WARN_ADD([-pedantic], [WARN_CXXFLAGS_TEST])
   CXXFLAGS=$save_CXXFLAGS
   AC_LANG_POP([C++])
 fi

 BISON_TEST_FOR_WORKING_C_COMPILER
 BISON_C_COMPILER_POSIXLY_CORRECT
 BISON_TEST_FOR_WORKING_CXX_COMPILER
 BISON_CXX_COMPILER_POSIXLY_CORRECT

 AC_ARG_ENABLE([yacc],
   [AC_HELP_STRING([--disable-yacc],
      [do not build a yacc command or an -ly library])],
   , [enable_yacc=yes])
 case $enable_yacc in
 yes)
   YACC_SCRIPT=yacc
   YACC_LIBRARY=liby.a;;
 *)
   YACC_SCRIPT=
   YACC_LIBRARY=;;
 esac
 AC_SUBST([YACC_SCRIPT])
 AC_SUBST([YACC_LIBRARY])

 # Checks for programs.
 AM_MISSING_PROG([DOT], [dot])
 AC_PROG_LEX
 $LEX_IS_FLEX || AC_MSG_ERROR([Flex is required])
 AC_PROG_YACC
 AC_PROG_RANLIB
 AC_PROG_GNU_M4
 AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
 AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
 supports -g, otherwise to "".])
 AC_PATH_PROG([PERL], [perl])
 if test -z "$PERL"; then
    AC_MSG_ERROR([perl not found])
 fi
 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

 # Checks for library functions.
 AC_CHECK_FUNCS_ONCE([setlocale])
 AM_WITH_DMALLOC
 BISON_PREREQ_TIMEVAR

 # 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([0.18])
 BISON_I18N

 # 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/Makefile tests/atlocal])
 AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
 AC_CHECK_PROGS([VALGRIND], [valgrind])
 case $VALGRIND:$host_os in
   '':*) ;;
   *:darwin*)
     # See README-hacking.
     # VALGRIND+=' --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind'
     VALGRIND=;;
   *:*)
     AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"]);;
 esac

 AM_MISSING_PROG([AUTOM4TE], [autom4te])
 # Needed by tests/atlocal.in.
 AC_SUBST([GCC])

 gt_JAVACOMP([1.3])
 gt_JAVAEXEC

 AC_CONFIG_FILES([Makefile
 		 build-aux/Makefile
 		 po/Makefile.in
 		 data/Makefile
 		 etc/Makefile
 		 examples/Makefile
 		    examples/calc++/Makefile
 		 lib/Makefile src/Makefile
 		 doc/Makefile
 		   doc/yacc.1])
 AC_OUTPUT
	# Configure template for GNU Bison. --Autoconf--
	#
	# Copyright (C) 2001-2012 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 <http://www.gnu.org/licenses/>.

	# In order for some versions of Sun Studio to compile our C++ test cases
	# correctly, we need Autoconf 2.64 or better to handle the restrict
	# keyword in at least string.h from gnulib. We need Autoconf 2.68 or
	# better to avoid a typo in the `configure --help' entry for the YACC
	# environment variable.
	AC_PREREQ([2.68])
	m4_pattern_forbid([^gl_[A-Z]])

	AC_INIT([GNU Bison],
	m4_esyscmd([build-aux/git-version-gen .tarball-version]),
	[bug-bison@gnu.org])
	AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012])
	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])

	# Automake 1.10.3 and 1.11.1 fix a security flaw discussed here:
	#
	# http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131
	#
	# To avoid 1.11, we make 1.11.1 the minimum version.
	#
	# 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([1.11.1 dist-xz 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_STDC
	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_ARG_ENABLE([gcc-warnings],
	[ --enable-gcc-warnings turn on lots of GCC warnings (not recommended)],
	[case $enable_gcc_warnings in
	yes\|no) ;;
	*) AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
	esac],
	[enable_gcc_warnings=no])
	if test "$enable_gcc_warnings" = yes; then
	warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
	-Wformat -Wpointer-arith -Wwrite-strings'
	warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes'
	warn_cxx='-Wnoexcept'
	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])
	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.
	gl_WARN_ADD([-Wmissing-declarations], [WARN_CFLAGS_TEST])
	gl_WARN_ADD([-Wmissing-prototypes], [WARN_CFLAGS_TEST])
	test $lv_cv_gcc_pragma_push_works = yes &&
	AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"])

	# Warnings for the test suite only.
	gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
	gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST])
	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
	gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS],
	[AC_LANG_PROGRAM([], [nullptr])])
	gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS])
	# Warnings for the test suite only.
	gl_WARN_ADD([-Wundef], [WARN_CXXFLAGS_TEST])
	gl_WARN_ADD([-pedantic], [WARN_CXXFLAGS_TEST])
	CXXFLAGS=$save_CXXFLAGS
	AC_LANG_POP([C++])
	fi

	BISON_TEST_FOR_WORKING_C_COMPILER
	BISON_C_COMPILER_POSIXLY_CORRECT
	BISON_TEST_FOR_WORKING_CXX_COMPILER
	BISON_CXX_COMPILER_POSIXLY_CORRECT

	AC_ARG_ENABLE([yacc],
	[AC_HELP_STRING([--disable-yacc],
	[do not build a yacc command or an -ly library])],
	, [enable_yacc=yes])
	case $enable_yacc in
	yes)
	YACC_SCRIPT=yacc
	YACC_LIBRARY=liby.a;;
	*)
	YACC_SCRIPT=
	YACC_LIBRARY=;;
	esac
	AC_SUBST([YACC_SCRIPT])
	AC_SUBST([YACC_LIBRARY])

	# Checks for programs.
	AM_MISSING_PROG([DOT], [dot])
	AC_PROG_LEX
	$LEX_IS_FLEX \|\| AC_MSG_ERROR([Flex is required])
	AC_PROG_YACC
	AC_PROG_RANLIB
	AC_PROG_GNU_M4
	AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.])
	AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4
	supports -g, otherwise to "".])
	AC_PATH_PROG([PERL], [perl])
	if test -z "$PERL"; then
	AC_MSG_ERROR([perl not found])
	fi
	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

	# Checks for library functions.
	AC_CHECK_FUNCS_ONCE([setlocale])
	AM_WITH_DMALLOC
	BISON_PREREQ_TIMEVAR

	# 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([0.18])
	BISON_I18N

	# 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/Makefile tests/atlocal])
	AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
	AC_CHECK_PROGS([VALGRIND], [valgrind])
	case $VALGRIND:$host_os in
	'':*) ;;
	:darwin)
	# See README-hacking.
	# VALGRIND+=' --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind'
	VALGRIND=;;
	:)
	AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"]);;
	esac

	AM_MISSING_PROG([AUTOM4TE], [autom4te])
	# Needed by tests/atlocal.in.
	AC_SUBST([GCC])

	gt_JAVACOMP([1.3])
	gt_JAVAEXEC

	AC_CONFIG_FILES([Makefile
	build-aux/Makefile
	po/Makefile.in
	data/Makefile
	etc/Makefile
	examples/Makefile
	examples/calc++/Makefile
	lib/Makefile src/Makefile
	doc/Makefile
	doc/yacc.1])
	AC_OUTPUT