# Configure template for GNU Bison. -*-Autoconf-*-
#
-# Copyright (C) 2001-2012 Free Software Foundation, Inc.
+# Copyright (C) 2001-2013 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
AC_INIT([GNU Bison],
m4_esyscmd([build-aux/git-version-gen .tarball-version]),
[bug-bison@gnu.org])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2012])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2013])
AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
[The copyright year for this package])
m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
[gnu], [gnits]))
AM_SILENT_RULES([yes])
-AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
+AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
# Checks for the compiler.
AC_PROG_CC_STDC
# Gnulib (early checks).
gl_EARLY
+# Gnulib uses '#pragma GCC diagnostic push' to silence some
+# warnings, but older gcc doesn't support this.
+AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
+ [lv_cv_gcc_pragma_push_works], [
+ save_CFLAGS=$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 $enable_gcc_warnings in
[enable_gcc_warnings=no])
if test "$enable_gcc_warnings" = yes; then
warn_common='-Wall -Wextra -Wno-sign-compare -Wcast-align
- -Wcast-qual -Wformat -Wpointer-arith -Wwrite-strings'
- warn_c='-Wbad-function-cast -Wmissing-declarations -Wmissing-prototypes
- -Wshadow -Wstrict-prototypes'
- warn_cxx='-Wnoexcept -Wzero-as-null-pointer-constant'
+ -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])
+ # Variants break strict aliasing analysis.
+ gl_WARN_ADD([-fno-strict-aliasing], [NO_STRICT_ALIAS_CXXFLAGS])
+ CXXFLAGS=$save_CXXFLAGS
AC_LANG_POP([C++])
fi
BISON_TEST_FOR_WORKING_C_COMPILER
+BISON_C_COMPILER_POSIXLY_CORRECT
BISON_TEST_FOR_WORKING_CXX_COMPILER
+BISON_CXX_COMPILER_POSIXLY_CORRECT
AC_ARG_ENABLE([yacc],
[AC_HELP_STRING([--disable-yacc],
AC_SUBST([YACC_LIBRARY])
# Checks for programs.
+AM_MISSING_PROG([DOT], [dot])
AC_PROG_LEX
-if test "$FLEX" != yes; then
- AC_MSG_ERROR([Flex is required])
-fi
+$LEX_IS_FLEX || AC_MSG_ERROR([Flex is required])
AC_PROG_YACC
AC_PROG_RANLIB
AC_PROG_GNU_M4
AC_CONFIG_FILES([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], [1.4])
gt_JAVAEXEC
-# We use gnulib, but from lib/local.mk instead of lib/Makefile.am.
-# So prefix paths with lib/. See also etc/prefix-gnulib-mk.
-gl_LIBOBJS=`echo "$gl_LIBOBJS" | sed -e 's, , lib/,g'`
-# Listing the names of the variables to prefix is error-prone.
-# Rather, adjust all the AC_SUBST variables whose name ends in '_H',
-# and whose content ends in '.h'.
-for ac_var in $ac_subst_vars
-do
- eval "ac_val=\$$ac_var"
- case $ac_var=$ac_val in
- (*_H=*.h) eval "$ac_var=lib/\$$ac_var";;
- esac
-done
AC_CONFIG_FILES([Makefile
po/Makefile.in
doc/yacc.1])
projects / bison.git / blobdiff