1# Configure template for GNU Bison. -*-Autoconf-*- 2# 3# Copyright (C) 2001-2012 Free Software Foundation, Inc. 4# 5# This program is free software: you can redistribute it and/or modify 6# it under the terms of the GNU General Public License as published by 7# the Free Software Foundation, either version 3 of the License, or 8# (at your option) any later version. 9# 10# This program is distributed in the hope that it will be useful, 11# but WITHOUT ANY WARRANTY; without even the implied warranty of 12# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the 13# GNU General Public License for more details. 14# 15# You should have received a copy of the GNU General Public License 16# along with this program. If not, see <http://www.gnu.org/licenses/>. 17 18# In order for some versions of Sun Studio to compile our C++ test cases 19# correctly, we need Autoconf 2.64 or better to handle the restrict 20# keyword in at least string.h from gnulib. We need Autoconf 2.68 or 21# better to avoid a typo in the `configure --help' entry for the YACC 22# environment variable. 23AC_PREREQ([2.68]) 24m4_pattern_forbid([^gl_[A-Z]]) 25 26AC_INIT([GNU Bison], 27 m4_esyscmd([build-aux/git-version-gen .tarball-version]), 28 [bug-bison@gnu.org]) 29AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012]) 30AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR], 31 [The copyright year for this package]) 32 33AC_CONFIG_AUX_DIR([build-aux]) 34AC_CONFIG_MACRO_DIR([m4]) 35 36# Automake 1.10.3 and 1.11.1 fix a security flaw discussed here: 37# 38# http://thread.gmane.org/gmane.comp.sysutils.autotools.announce/131 39# 40# To avoid 1.11, we make 1.11.1 the minimum version. 41# 42# We want gnits strictness only when rolling a stable release. For 43# release candidates, we use version strings like 2.4.3_rc1, but gnits 44# doesn't like that, so we let the underscore disable gnits. Between 45# releases, we want to be able run make dist without being required to 46# add a bogus NEWS entry. In that case, the version string 47# automatically contains a dash, which we also let disable gnits. 48AM_INIT_AUTOMAKE([1.11.1 dist-xz silent-rules] 49 m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]], 50 [gnu], [gnits])) 51AM_SILENT_RULES([yes]) 52AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h]) 53 54# Checks for the compiler. 55AC_PROG_CC_STDC 56AC_PROG_CXX 57 58# Gnulib (early checks). 59gl_EARLY 60 61# Gnulib uses '#pragma GCC diagnostic push' to silence some 62# warnings, but older gcc doesn't support this. 63AC_CACHE_CHECK([whether pragma GCC diagnostic push works], 64 [lv_cv_gcc_pragma_push_works], [ 65 save_CFLAGS=$CFLAGS 66 CFLAGS='-Wunknown-pragmas -Werror' 67 AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[ 68 #pragma GCC diagnostic push 69 #pragma GCC diagnostic pop 70 ]])], 71 [lv_cv_gcc_pragma_push_works=yes], 72 [lv_cv_gcc_pragma_push_works=no]) 73 CFLAGS=$save_CFLAGS]) 74 75AC_ARG_ENABLE([gcc-warnings], 76[ --enable-gcc-warnings turn on lots of GCC warnings (not recommended)], 77[case $enable_gcc_warnings in 78 yes|no) ;; 79 *) AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);; 80 esac], 81 [enable_gcc_warnings=no]) 82if test "$enable_gcc_warnings" = yes; then 83 warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align 84 -Wformat -Wpointer-arith -Wwrite-strings' 85 warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes' 86 warn_cxx='-Wnoexcept' 87 AC_LANG_PUSH([C]) 88 # Clang supports many of GCC's -W options, but only issues warnings 89 # on the ones it does not recognize. In that case, gl_WARN_ADD 90 # thinks the option is supported, and unknown options are then added 91 # to CFLAGS. But then, when -Werror is added in the test suite for 92 # instance, the warning about the unknown option turns into an 93 # error. 94 # 95 # This should be addressed by gnulib's gl_WARN_ADD, but in the 96 # meanwhile, turn warnings about unknown options into errors in 97 # CFLAGS, and restore CFLAGS after the tests. 98 save_CFLAGS=$CFLAGS 99 gl_WARN_ADD([-Werror=unknown-warning-option], [CFLAGS]) 100 for i in $warn_common $warn_c; 101 do 102 gl_WARN_ADD([$i], [WARN_CFLAGS]) 103 done 104 gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) 105 106 # Warnings for the test suite, and maybe for bison if GCC is modern 107 # enough. 108 gl_WARN_ADD([-Wmissing-declarations], [WARN_CFLAGS_TEST]) 109 gl_WARN_ADD([-Wmissing-prototypes], [WARN_CFLAGS_TEST]) 110 test $lv_cv_gcc_pragma_push_works = yes && 111 AS_VAR_APPEND([WARN_CFLAGS], [" $WARN_CFLAGS_TEST"]) 112 113 # Warnings for the test suite only. 114 gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST]) 115 gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST]) 116 CFLAGS=$save_CFLAGS 117 AC_LANG_POP([C]) 118 119 120 AC_LANG_PUSH([C++]) 121 save_CXXFLAGS=$CXXFLAGS 122 gl_WARN_ADD([-Werror=unknown-warning-option], [CXXFLAGS]) 123 for i in $warn_common $warn_cxx; 124 do 125 gl_WARN_ADD([$i], [WARN_CXXFLAGS]) 126 done 127 gl_WARN_ADD([-Wzero-as-null-pointer-constant], [WARN_CXXFLAGS], 128 [AC_LANG_PROGRAM([], [nullptr])]) 129 gl_WARN_ADD([-Werror], [WERROR_CXXFLAGS]) 130 # Warnings for the test suite only. 131 gl_WARN_ADD([-Wundef], [WARN_CXXFLAGS_TEST]) 132 gl_WARN_ADD([-pedantic], [WARN_CXXFLAGS_TEST]) 133 CXXFLAGS=$save_CXXFLAGS 134 AC_LANG_POP([C++]) 135fi 136 137BISON_TEST_FOR_WORKING_C_COMPILER 138BISON_C_COMPILER_POSIXLY_CORRECT 139BISON_TEST_FOR_WORKING_CXX_COMPILER 140BISON_CXX_COMPILER_POSIXLY_CORRECT 141 142AC_ARG_ENABLE([yacc], 143 [AC_HELP_STRING([--disable-yacc], 144 [do not build a yacc command or an -ly library])], 145 , [enable_yacc=yes]) 146case $enable_yacc in 147yes) 148 YACC_SCRIPT=yacc 149 YACC_LIBRARY=liby.a;; 150*) 151 YACC_SCRIPT= 152 YACC_LIBRARY=;; 153esac 154AC_SUBST([YACC_SCRIPT]) 155AC_SUBST([YACC_LIBRARY]) 156 157# Checks for programs. 158AM_MISSING_PROG([DOT], [dot]) 159AC_PROG_LEX 160$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required]) 161AC_PROG_YACC 162AC_PROG_RANLIB 163AC_PROG_GNU_M4 164AC_DEFINE_UNQUOTED([M4], ["$M4"], [Define to the GNU M4 executable name.]) 165AC_DEFINE_UNQUOTED([M4_GNU_OPTION], ["$M4_GNU"], [Define to "-g" if GNU M4 166supports -g, otherwise to "".]) 167AC_PATH_PROG([PERL], [perl]) 168if test -z "$PERL"; then 169 AC_MSG_ERROR([perl not found]) 170fi 171AM_MISSING_PROG([HELP2MAN], [help2man]) 172AC_PATH_PROG([XSLTPROC], [xsltproc]) 173AC_SUBST([XSLTPROC]) 174 175# Checks for header files. 176AC_CHECK_HEADERS_ONCE([locale.h]) 177 178# Checks for compiler characteristics. 179AC_C_INLINE 180 181# Gnulib (later checks). Putting them here rather than right after 182# gl_EARLY avoids some redundant checks. 183gl_INIT 184 185# Checks for library functions. 186AC_CHECK_FUNCS_ONCE([setlocale]) 187AM_WITH_DMALLOC 188BISON_PREREQ_TIMEVAR 189 190# Gettext. 191# We use gnulib, which is only guaranteed to work properly with the 192# latest Gettext. 193AM_GNU_GETTEXT([external], [need-ngettext]) 194AM_GNU_GETTEXT_VERSION([0.18]) 195BISON_I18N 196 197# Internationalized parsers. 198AC_CONFIG_FILES([runtime-po/Makefile.in]) 199# Autoconf macros for packages using internationalized parsers. 200aclocaldir='${datadir}/aclocal' 201AC_SUBST([aclocaldir]) 202 203# Create the benchmark script. 204AC_CONFIG_FILES([etc/bench.pl], [chmod +x etc/bench.pl]) 205 206# Initialize the test suite. 207AC_CONFIG_TESTDIR(tests) 208AC_CONFIG_FILES([tests/Makefile tests/atlocal]) 209AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison]) 210AC_CHECK_PROGS([VALGRIND], [valgrind]) 211case $VALGRIND:$host_os in 212 '':*) ;; 213 *:darwin*) 214 # See README-hacking. 215 # VALGRIND+=' --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind' 216 VALGRIND=;; 217 *:*) 218 AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"]);; 219esac 220 221AM_MISSING_PROG([AUTOM4TE], [autom4te]) 222# Needed by tests/atlocal.in. 223AC_SUBST([GCC]) 224 225gt_JAVACOMP([1.3]) 226gt_JAVAEXEC 227 228AC_CONFIG_FILES([Makefile 229 build-aux/Makefile 230 po/Makefile.in 231 data/Makefile 232 etc/Makefile 233 examples/Makefile 234 examples/calc++/Makefile 235 lib/Makefile src/Makefile 236 doc/Makefile 237 doc/yacc.1]) 238AC_OUTPUT 239