# Configure template for GNU Bison. -*-Autoconf-*-
#
-# Copyright (C) 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008 Free Software
-# Foundation, Inc.
+# Copyright (C) 2001-2015 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
# You should have received a copy of the GNU General Public License
# along with this program. If not, see <http://www.gnu.org/licenses/>.
-# We have strange test case titles, so we need Autoconf 2.61 or better.
-AC_PREREQ(2.61)
+# 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_DEFINE([PACKAGE_COPYRIGHT_YEAR], [2008],
- [The copyright year for this package])
-AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2008])
+AC_SUBST([PACKAGE_COPYRIGHT_YEAR], [2015])
+AC_DEFINE_UNQUOTED([PACKAGE_COPYRIGHT_YEAR], [$PACKAGE_COPYRIGHT_YEAR],
+ [The copyright year for this package])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([m4])
-# We don't have a file m4/Makefile.am, so we need Automake 1.8 or later.
-# We want gnits strictness only when rolling a formal release so that we can,
-# for example, run make dist at other times without being required to add a
-# bogus NEWS entry.
-AM_INIT_AUTOMAKE([1.8 dist-bzip2]
- m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [-], [gnu], [gnits]))
-AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
+# We use Automake 1.14's %D% and %C%.
+#
+# We want gnits strictness only when rolling a stable release. For
+# release candidates, we use version strings like 2.4.3_rc1, but gnits
+# doesn't like that, so we let the underscore disable gnits. Between
+# releases, we want to be able run make dist without being required to
+# add a bogus NEWS entry. In that case, the version string
+# automatically contains a dash, which we also let disable gnits.
+AM_INIT_AUTOMAKE([1.14 dist-xz nostdinc
+ color-tests parallel-tests
+ silent-rules]
+ m4_bmatch(m4_defn([AC_PACKAGE_VERSION]), [[-_]],
+ [gnu], [gnits]))
+AM_SILENT_RULES([yes])
+AC_CONFIG_HEADERS([lib/config.h:lib/config.in.h])
# Checks for the compiler.
AC_PROG_CC_STDC
+AC_PROG_CXX
# Gnulib (early checks).
gl_EARLY
-AC_ARG_ENABLE(gcc-warnings,
-[ --enable-gcc-warnings turn on lots of GCC warnings (not recommended)],
-[case "${enableval}" in
+# 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).
+ Also, issue synclines from the examples/ to
+ the corresponding source in the Texinfo doc.],
+[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])
+AM_CONDITIONAL([ENABLE_GCC_WARNINGS], [test "$enable_gcc_warnings" = yes])
+if test "$enable_gcc_warnings" = yes; then
+ warn_common='-Wall-Wextra -Wno-sign-compare -Wcast-align -Wdocumentation
+ -Wformat -Wpointer-arith -Wwrite-strings'
+ warn_c='-Wbad-function-cast -Wshadow -Wstrict-prototypes'
+ warn_cxx='-Wnoexcept'
+ # Warnings for the test suite only.
+ #
+ # -fno-color-diagnostics: Clang's use of colors in the error
+ # messages is confusing the tests looking at the compiler's output
+ # (e.g., synclines.at).
+ warn_tests='-Wundef -pedantic -Wsign-compare -fno-color-diagnostics'
+
+ 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])
- AC_DEFINE([lint], 1, [Define to 1 if the compiler is checking for lint.])
+
+ # 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.
+ for i in $warn_tests;
+ do
+ gl_WARN_ADD([$i], [WARN_CFLAGS_TEST])
+ done
+ 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.
+ for i in $warn_tests;
+ do
+ gl_WARN_ADD([$i], [WARN_CXXFLAGS_TEST])
+ done
+ # Clang++ 3.2+ reject C code generated by Flex.
+ gl_WARN_ADD([-Wno-null-conversion], [FLEX_SCANNER_CXXFLAGS])
+ # So does G++ 4.8...
+ gl_WARN_ADD([-Wno-sign-compare], [FLEX_SCANNER_CXXFLAGS])
+ # ... possiby in std=c++11 mode.
+ gl_WARN_ADD([-Wno-zero-as-null-pointer-constant], [FLEX_SCANNER_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],
[do not build a yacc command or an -ly library])],
, [enable_yacc=yes])
-case $enable_yacc in
-yes)
- YACC_SCRIPT=src/yacc
- YACC_LIBRARY=lib/liby.a;;
-*)
- YACC_SCRIPT=
- YACC_LIBRARY=;;
-esac
-AC_SUBST([YACC_SCRIPT])
-AC_SUBST([YACC_LIBRARY])
+AM_CONDITIONAL([ENABLE_YACC], [test "$enable_yacc" = yes])
# Checks for programs.
+AM_MISSING_PROG([DOT], [dot])
AC_PROG_LEX
+$LEX_IS_FLEX || test "X$LEX" = X: || {
+ AC_MSG_WARN([bypassing lex because flex is required])
+ LEX=:
+}
+AM_CONDITIONAL([FLEX_CXX_WORKS],
+ [$LEX_IS_FLEX && test $bison_cv_cxx_works = yes])
AC_PROG_YACC
AC_PROG_RANLIB
-BISON_PROG_GNU_M4
-if test x"$ac_cv_prog_gnu_m4" != xyes; then
- AC_MSG_ERROR([GNU M4 1.4 is required])
-fi
+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.
-# We've never tested with gettext versions before 0.15, so play it safe.
-AM_GNU_GETTEXT([external], [need-formatstring-macros])
-AM_GNU_GETTEXT_VERSION([0.15])
+# 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([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+='-q --suppressions=$(abs_top_srcdir)/build-aux/darwin11.4.0.valgrind'
+ VALGRIND=;;
+ *:*)
+ suppfile=build-aux/$host_os.valgrind
+ if test -f "$srcdir/$suppfile"; then
+ VALGRIND="$VALGRIND --gen-suppressions=all"
+ VALGRIND="$VALGRIND --suppressions=\$(abs_top_srcdir)/$suppfile"
+ fi
+ AC_SUBST([VALGRIND_PREBISON], ["$VALGRIND -q"])
+ ;;
+esac
+
+# Whether we cannot run the compiled bison.
+AM_CONDITIONAL([CROSS_COMPILING], [test "$cross_compiling" = yes])
+
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 $CXXFLAGS | sed 's/-O[[0-9]] *//'`])
gt_JAVACOMP([1.3], [1.4])
gt_JAVAEXEC
-AC_SUBST([gl_PREFIXED_LIBOBJS],
- [$(echo "$gl_LIBOBJS" | sed -e 's, , lib/,g')])
-for ac_var in ERRNO_H GETOPT_H INTTYPES_H STDBOOL_H STDINT_H WCHAR_H WCTYPE_H
-do
- eval "$ac_var=lib/\$$ac_var"
-done
AC_CONFIG_FILES([Makefile
- po/Makefile.in
- examples/calc++/Makefile
- doc/yacc.1])
+ po/Makefile.in
+ doc/yacc.1])
AC_OUTPUT
projects / bison.git / blobdiff