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e0408e69ed
* m4/gnulib-cache.m4: Import strsignal module. * src/m4.c (main): Register more handlers, and prefer sigaction when available. (SIGBUS, NSIG): Provide fallback when lacking. (signal_message): New variable, to keep async-safety. (fault_handler): Display faulting signal description. * configure.ac (gl_DISABLE_THREADS): Request gnulib modules to optimize for single-threaded operation. Signed-off-by: Eric Blake <ebb9@byu.net>
114 lines
3.5 KiB
Plaintext
114 lines
3.5 KiB
Plaintext
# Configure template for GNU M4. -*-Autoconf-*-
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# Copyright (C) 1991, 1993, 1994, 2004, 2005, 2006, 2007, 2008 Free
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# Software Foundation, Inc.
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#
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# This file is part of GNU M4.
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#
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# GNU M4 is free software: you can redistribute it and/or modify
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# it under the terms of the GNU General Public License as published by
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# the Free Software Foundation, either version 3 of the License, or
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# (at your option) any later version.
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#
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# GNU M4 is distributed in the hope that it will be useful,
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# but WITHOUT ANY WARRANTY; without even the implied warranty of
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# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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# GNU General Public License for more details.
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#
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# You should have received a copy of the GNU General Public License
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# along with this program. If not, see <http://www.gnu.org/licenses/>.
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AC_PREREQ([2.60])
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AC_INIT([GNU M4], m4_esyscmd([build-aux/git-version-gen .tarball-version]),
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[bug-m4@gnu.org])
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AC_CONFIG_AUX_DIR([build-aux])
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AM_INIT_AUTOMAKE([1.10.1 dist-bzip2 dist-lzma gnu])
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m4_pattern_forbid([^M4_[A-Z]])
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AC_CONFIG_SRCDIR([src/m4.h])
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AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
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AC_PROG_CC
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M4_EARLY
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# M4 is single-threaded; so we can optimize gnulib code by using this:
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gl_DISABLE_THREADS
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# Tandem/NSK is broken - it has 'long long int' but not
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# 'unsigned long long int', which confuses assumptions made by gnulib.
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# Simply pretend that neither type exists if both do not work.
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AC_TYPE_LONG_LONG_INT
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AC_TYPE_UNSIGNED_LONG_LONG_INT
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if test $ac_cv_type_long_long_int:$ac_cv_type_unsigned_long_long_int = yes:no
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then
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ac_cv_type_long_long_int=no
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AC_DEFINE([HAVE_LONG_LONG_INT], 0,
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[Define to 1 if the system has the type `long long int'.])
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fi
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M4_INIT
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AC_CACHE_CHECK([if system() agrees with pclose()],
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[M4_cv_func_system_consistent],
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[AC_RUN_IFELSE([AC_LANG_PROGRAM([
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#include <stdio.h>
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#include <stdlib.h>
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#include <errno.h>
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], [int i1, i2;
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FILE *f;
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i1 = system ("exit 2");
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if (i1 == -1)
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return 1;
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f = popen ("exit 2", "r");
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if (!f)
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return 1;
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i2 = pclose (f);
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return i1 != i2;])],
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[M4_cv_func_system_consistent=yes], [M4_cv_func_system_consistent=no],
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[AC_COMPILE_IFELSE([
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/* EMX on OS/2 defines WEXITSTATUS to be (x>>8)&0xff, and uses that for
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pclose(), but for system() it uses x&0xff instead. Otherwise, we assume
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your system is sane and that pclose() and system() are consistent in their
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values. If this heuristic is wrong for your platform, report it as a bug
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to bug-m4@gnu.org. */
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#ifdef __EMX__
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choke me
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#endif
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], [M4_cv_func_system_consistent=yes], [M4_cv_func_system_consistent=no])])])
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if test "$M4_cv_func_system_consistent" = no ; then
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AC_DEFINE([FUNC_SYSTEM_BROKEN], [1],
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[Define to 1 if the return value of system() disagrees with pclose().])
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fi
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dnl Don't let changeword get in our way, if bootstrapping with a version of
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dnl m4 that already turned the feature on.
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m4_ifdef([changeword], [m4_undefine([changeword])])dnl
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AC_MSG_CHECKING([[if changeword is wanted]])
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AC_ARG_ENABLE([changeword],
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[AS_HELP_STRING([--enable-changeword],
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[enable -W and changeword() builtin])],
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[if test "$enableval" = yes; then
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AC_MSG_RESULT([yes])
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AC_DEFINE([ENABLE_CHANGEWORD], [1],
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[Define to 1 if the changeword(REGEXP) functionality is wanted])
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else
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AC_MSG_RESULT([no])
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fi], [AC_MSG_RESULT([no])])
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M4_WITH_DMALLOC
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AC_CONFIG_COMMANDS([stamp-h], [[test -z "$CONFIG_HEADERS" || date > stamp-h]])
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AC_CONFIG_FILES([Makefile
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doc/Makefile
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lib/Makefile
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src/Makefile
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tests/Makefile
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checks/Makefile
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examples/Makefile
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])
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AC_OUTPUT
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