# 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 . # 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. 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AC_PROG_CC_STDC # Gnulib (early checks). gl_EARLY 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 gl_WARN_ADD([-Werror], [WERROR_CFLAGS]) AC_SUBST([WERROR_CFLAGS]) gl_WARN_ADD([-Wall]) gl_WARN_ADD([-Wextra -Wno-sign-compare]) gl_WARN_ADD([-Wcast-align]) gl_WARN_ADD([-Wcast-qual]) gl_WARN_ADD([-Wformat]) gl_WARN_ADD([-Wpointer-arith]) gl_WARN_ADD([-Wwrite-strings]) AC_SUBST([WARN_CXXFLAGS], [$WARN_CFLAGS]) # The following warnings are not suitable for C++. gl_WARN_ADD([-Wbad-function-cast]) gl_WARN_ADD([-Wmissing-declarations]) gl_WARN_ADD([-Wmissing-prototypes]) gl_WARN_ADD([-Wshadow]) gl_WARN_ADD([-Wstrict-prototypes]) AC_SUBST([WARN_CFLAGS]) # Warnings for the test suite only. gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST]) gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST]) AC_SUBST([WARN_CXXFLAGS_TEST], ["$WARN_CXXFLAGS $WARN_CFLAGS_TEST"]) AC_SUBST([WARN_CFLAGS_TEST], ["$WARN_CFLAGS $WARN_CFLAGS_TEST"]) fi BISON_TEST_FOR_WORKING_C_COMPILER 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=src/yacc YACC_LIBRARY=lib/liby.a;; *) YACC_SCRIPT= YACC_LIBRARY=;; esac AC_SUBST([YACC_SCRIPT]) AC_SUBST([YACC_LIBRARY]) # Checks for programs. 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