# Configure template for GNU m4. -*-Autoconf-*-
# Copyright (C) 1991-1994, 2000-2002, 2004-2013 Free Software
# Foundation, Inc.
#
# This file is part of GNU M4.
#
# GNU M4 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.
#
# GNU M4 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 .
dnl We depend on autotest's ./testsuite -C.
AC_PREREQ([2.62])
## ------------------------ ##
## Autoconf initialization. ##
## ------------------------ ##
m4_define([M4_VERSION],
m4_esyscmd([build-aux/git-version-gen .tarball-version]))
m4_bmatch(m4_defn([M4_VERSION]), [^[0-9]], [],
[m4_define([M4_VERSION], [1.9a])])
AC_INIT([GNU M4], m4_defn([M4_VERSION]), [bug-m4@gnu.org])
AC_CONFIG_SRCDIR([src/m4.h])
AC_CONFIG_AUX_DIR([build-aux])
AC_CONFIG_MACRO_DIR([build-aux/m4])
AC_CONFIG_LIBOBJ_DIR([m4/gnu])
AC_CONFIG_TESTDIR([tests])
AC_CONFIG_HEADERS([config.h])
AC_CONFIG_FILES([tests/m4], [chmod +x tests/m4])
## -------------------------- ##
## M4 specific configuration. ##
## -------------------------- ##
dnl Autoconf recommends that packages use lowercase for their package-specific
dnl prefix for cache variables. But in the case of m4, that collides with
dnl the m4_ namespace provided by m4sugar, so we prefer M4_ as our
dnl package-specific prefix.
m4_pattern_forbid([^M4_[A-Z]])
AC_DEFUN([M4_DEFAULT_PRELOAD], [])
M4_default_preload="M4_DEFAULT_PRELOAD"
## ------------------------ ##
## Automake Initialization. ##
## ------------------------ ##
AM_INIT_AUTOMAKE([1.10b subdir-objects dist-bzip2 dist-xz
color-tests parallel-tests silent-rules]
m4_if(m4_index(m4_defn([M4_VERSION]), [-]), [-1], [gnits], [gnu]))
m4_ifdef([AM_SILENT_RULES], [AM_SILENT_RULES([yes])])
## ------------------ ##
## C compiler checks. ##
## ------------------ ##
AC_PROG_CC
AC_DEFUN([gl_CXX_CHOICE_DEFAULT_NO])
M4_EARLY
# Maintainer note - comment this line out if you plan to rerun
# GNULIB_POSIXCHECK testing to see if M4 should be using more modules.
# Leave it uncommented for normal releases, for faster ./configure.
gl_ASSERT_NO_GNULIB_POSIXCHECK
AC_SYS_LARGEFILE
AC_PROG_CPP
AM_PROG_CC_C_O
M4_CHECK_DEBUGGING
## ----------------------- ##
## Libtool initialization. ##
## ----------------------- ##
LT_PREREQ([2.2])
LT_INIT([shared dlopen win32-dll])
AC_ARG_ENABLE([gcc-warnings],
[AS_HELP_STRING([--enable-gcc-warnings],
[turn on lots of GCC warnings (for developers)])],
[case $enableval in
yes|no) ;;
*) AC_MSG_ERROR([bad value $enableval for gcc-warnings option]) ;;
esac
gl_gcc_warnings=$enableval],
[gl_gcc_warnings=no]
)
if test "$gl_gcc_warnings" = yes; then
gl_WARN_ADD([-Werror], [WERROR_CFLAGS])
AC_SUBST([WERROR_CFLAGS])
# This, $nw, is the list of warnings we disable.
nw=
nw="$nw -Waggregate-return" # K&R is anachronistic
nw="$nw -Wtraditional-conversion" # K&R is anachronistic
nw="$nw -Wundef" # K&R is anachronistic
nw="$nw -Wlong-long" # C90 is anachronistic
nw="$nw -Wsystem-headers" # Don't let system headers trigger warnings
nw="$nw -Wpadded" # Our structs are not packed
nw="$nw -Wformat-nonliteral" # Needed in builtin.c
nw="$nw -Wconversion" # Too many warnings for now
nw="$nw -Wsign-conversion" # Too many warnings for now
nw="$nw -Wcast-qual" # Too many warnings for now
nw="$nw -Wswitch-enum" # Too many warnings for now
# gcc 4.4.6 complains enum-compare is C++ only; gcc 4.7.0 implies it in -Wall
nw="$nw -Wenum-compare"
# Gnulib uses '#pragma GCC diagnostic push' to silence some
# warnings, but older gcc doesn't support this.
AC_CACHE_CHECK([whether pragma GCC diagnostic push works],
[M4_cv_gcc_pragma_push_works], [
save_CFLAGS=$CFLAGS
CFLAGS='-Wunknown-pragmas -Werror'
AC_COMPILE_IFELSE([AC_LANG_PROGRAM([[
#pragma GCC diagnostic push
#pragma GCC diagnostic pop
]])],
[M4_cv_gcc_pragma_push_works=yes],
[M4_cv_gcc_pragma_push_works=no])
CFLAGS=$save_CFLAGS])
if test $M4_cv_gcc_pragma_push_works = no; then
nw="$nw -Wmissing-prototypes"
nw="$nw -Wmissing-declarations"
nw="$nw -Wunreachable-code"
fi
gl_MANYWARN_ALL_GCC([ws])
gl_MANYWARN_COMPLEMENT([ws], [$ws], [$nw])
for w in $ws; do
gl_WARN_ADD([$w])
done
gl_WARN_ADD([-fdiagnostics-show-option])
gl_WARN_ADD([-funit-at-a-time])
AC_SUBST([WARN_CFLAGS])
AH_VERBATIM([FORTIFY_SOURCE],
[/* Enable compile-time and run-time bounds-checking, and some warnings,
without upsetting newer glibc. */
#if defined __OPTIMIZE__ && __OPTIMIZE__
# define _FORTIFY_SOURCE 2
#endif
])
fi
# Use gcc's -pipe option if available: for faster compilation.
case "$CFLAGS" in
*-pipe* ) ;;
* ) _LT_COMPILER_OPTION([if $compiler supports -pipe],
[M4_cv_prog_compiler_pipe],
[-pipe -c conftest.$ac_ext], [],
[CFLAGS="$CFLAGS -pipe"])
;;
esac
## ------------------------------- ##
## Preloaded module configuration. ##
## ------------------------------- ##
AS_IF([test "x$enable_shared" != xno],
[DYNAMIC_MODULES=yes], [DYNAMIC_MODULES=no])
AC_SUBST([DYNAMIC_MODULES], [$DYNAMIC_MODULES])
AC_MSG_CHECKING([for modules to preload])
DLPREOPEN=
AC_ARG_WITH([modules],
[AS_HELP_STRING([--with-modules=MODULES],
[preload MODULES @<:@default: ]M4_DEFAULT_PRELOAD[@:>@])],
[use_modules="$withval"],
[use_modules="$M4_default_preload"])
PREOPEN_DEPENDENCIES=
DLPREOPEN="-dlpreopen force"
if test -z "$use_modules"; then
use_modules=none
else
if test "$use_modules" != yes; then
for module in $use_modules; do
case $module in
no|none) break ;;
m4|traditional|gnu|load|mpeval) dir=modules ;;
import|modtest|shadow|stdlib|time) dir=tests ;;
*) AC_MSG_ERROR([Unrecognized module `$module' in --with-modules])
;;
esac
DLPREOPEN="$DLPREOPEN -dlpreopen $dir/$module.la"
PREOPEN_DEPENDENCIES="$PREOPEN_DEPENDENCIES $dir/$module.la"
done
fi
fi
AC_MSG_RESULT([$use_modules])
AC_SUBST([DLPREOPEN])
AC_SUBST([PREOPEN_DEPENDENCIES])
## ---------------- ##
## Gettext support. ##
## ---------------- ##
AM_GNU_GETTEXT([external])
AM_GNU_GETTEXT_NEED([need-formatstring-macros])
AM_GNU_GETTEXT_VERSION([0.16])
M4_GNU_GETTEXT
## --------------- ##
## Gnulib support. ##
## --------------- ##
M4_INIT
gl_VERSION_ETC
# Gnulib doesn't always do things quite the way M4 would like...
M4_ERROR
M4_GETOPT
M4_OBSTACK
M4_REGEX
M4_RENAME
## --------------------------- ##
## C compiler characteristics. ##
## --------------------------- ##
AC_TYPE_SIZE_T
AC_CHECK_SIZEOF([long long int])
## ------------------------- ##
## C headers required by M4. ##
## ------------------------- ##
AC_CHECK_HEADERS_ONCE([limits.h])
if test $ac_cv_header_stdbool_h = yes; then
INCLUDE_STDBOOL_H='#include '
else
INCLUDE_STDBOOL_H='#include '
fi
AC_SUBST([INCLUDE_STDBOOL_H])
## --------------------------------- ##
## Library functions required by M4. ##
## --------------------------------- ##
AC_CHECK_FUNCS_ONCE([calloc strerror])
AM_WITH_DMALLOC
M4_SYS_STACKOVF
# This is for the modules
AC_STRUCT_TM
AC_FUNC_STRFTIME
AC_CHECK_FUNCS_ONCE([getcwd gethostname mktime uname])
## ------------------ ##
## Configure options. ##
## ------------------ ##
M4_LIB_GMP
AM_CONDITIONAL([USE_GMP], [test "x$USE_GMP" = xyes])
M4_SYSCMD
## -------- ##
## Outputs. ##
## -------- ##
AC_CONFIG_FILES([
Makefile
m4/gnu/Makefile
m4/system.h:m4/system_.h
tests/atlocal
tests/gnu/Makefile
])
AC_OUTPUT