# Configure template for GNU Bison. -*-Autoconf-*-
#
-# Copyright (C) 2001-2011 Free Software Foundation, Inc.
+# 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
# 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.
-AC_PREREQ(2.64)
+# 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_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2011],
- [The copyright year for this package])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2011])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012])
+AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
+ [The copyright year for this package])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
# releases, we want to be able run make dist without being required to
# add a bogus NEWS entry. In that case, the version string
# automatically contains a dash, which we also let disable gnits.
-AM_INIT_AUTOMAKE([1.11.1 dist-bzip2]
+AM_INIT_AUTOMAKE([1.11.1 dist-xz silent-rules]
m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
[gnu], [gnits]))
-AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
+AM_SILENT_RULES([yes])
+AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
# Checks for the compiler.
AC_PROG_CC_STDC
+AC_PROG_CXX
# Gnulib (early checks).
gl_EARLY
-AC_ARG_ENABLE(gcc-warnings,
+# Gnulib uses '#pragma GCC diagnostic push' to silence some
+# warnings, but older gcc doesn't support this.
+AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
+ [lv_cv_gcc_pragma_push_works], [
+ save_CFLAGS=$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=$save_CFLAGS])
+
+AC_ARG_ENABLE([gcc-warnings],
[ --enable-gcc-warnings turn on lots of GCC warnings (not recommended)],
-[case "${enableval}" in
+[case $enable_gcc_warnings in
yes|no) ;;
- *) AC_MSG_ERROR([bad value ${enableval} for gcc-warnings option]) ;;
+ *) AC_MSG_ERROR([invalid value for --gcc-warnings: $enable_gcc_warnings]);;
esac],
- [enableval=no])
-if test "${enableval}" = yes; then
+ [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])
- 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, 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], [" $WARN_CFLAGS_TEST"])
+
# Warnings for the test suite only.
gl_WARN_ADD([-Wundef], [WARN_CFLAGS_TEST])
- WARN_CXXFLAGS_TEST="$WARN_CXXFLAGS $WARN_CFLAGS_TEST"
- WARN_CFLAGS_TEST="$WARN_CFLAGS $WARN_CFLAGS_TEST"
- AC_SUBST([WARN_CXXFLAGS_TEST])
- AC_SUBST([WARN_CFLAGS_TEST])
- AC_DEFINE([lint], 1, [Define to 1 if the compiler is checking for lint.])
+ gl_WARN_ADD([-pedantic], [WARN_CFLAGS_TEST])
+ CFLAGS=$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=$save_CXXFLAGS
+ AC_LANG_POP([C++])
fi
BISON_TEST_FOR_WORKING_C_COMPILER
+BISON_TEST_FOR_WORKING_CXX_COMPILER
+BISON_C_COMPILER_POSIXLY_CORRECT
AC_ARG_ENABLE([yacc],
[AC_HELP_STRING([--disable-yacc],
AC_SUBST([YACC_LIBRARY])
# Checks for programs.
+AM_MISSING_PROG([DOT], [dot])
AC_PROG_LEX
+$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 library functions.
AC_CHECK_FUNCS_ONCE([setlocale])
AM_WITH_DMALLOC
-BISON_PREREQ_SUBPIPE
BISON_PREREQ_TIMEVAR
# Gettext.
AC_CONFIG_FILES([tests/Makefile tests/atlocal])
AC_CONFIG_FILES([tests/bison], [chmod +x tests/bison])
AC_CHECK_PROGS([VALGRIND], [valgrind])
-AC_PROG_CXX
-BISON_TEST_FOR_WORKING_CXX_COMPILER
+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])
-AC_SUBST([O0CFLAGS], [`echo $CFLAGS | sed 's/-O[[0-9]] *//'`])
-AC_SUBST([O0CXXFLAGS], [`echo $CXXFLAGS | sed 's/-O[[0-9]] *//'`])
gt_JAVACOMP([1.3])
gt_JAVAEXEC
projects / bison.git / blobdiff