1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
|
# Configure template for GNU M4. -*-Autoconf-*-
# Copyright (C) 1991, 1993, 1994, 2004, 2005, 2006, 2007, 2008 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 <http://www.gnu.org/licenses/>.
AC_PREREQ([2.60])
AC_INIT([GNU M4], [1.4.10b], [bug-m4@gnu.org])
AC_CONFIG_AUX_DIR([build-aux])
AM_INIT_AUTOMAKE([1.10.1 dist-bzip2 dist-lzma gnu])
m4_pattern_forbid([^M4_[A-Z]])
AC_CONFIG_SRCDIR([src/m4.h])
AC_CONFIG_HEADERS([lib/config.h:lib/config.hin])
AC_CANONICAL_BUILD
AC_CANONICAL_HOST
AC_PROG_CC
M4_EARLY
AC_SYS_LARGEFILE
AC_CHECK_HEADERS_ONCE([limits.h siginfo.h sys/wait.h])
AC_CHECK_TYPES([siginfo_t], [], [],
[[#include <signal.h>
#if HAVE_SIGINFO_H
# include <siginfo.h>
#endif
]])
AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], [], [],
[[#include <signal.h>
]])
AC_CHECK_MEMBERS([stack_t.ss_sp], [], [],
[[#include <signal.h>
#if HAVE_SIGINFO_H
# include <siginfo.h>
#endif
]])
AC_TYPE_SIGNAL
AC_TYPE_SIZE_T
AC_CHECK_FUNCS_ONCE([sigaction sigaltstack sigstack sigvec strerror])
# Tandem/NSK is broken - it has 'long long int' but not
# 'unsigned long long int', which confuses assumptions made by gnulib.
# Simply pretend that neither type exists if both do not work.
AC_TYPE_LONG_LONG_INT
AC_TYPE_UNSIGNED_LONG_LONG_INT
if test $ac_cv_type_long_long_int:$ac_cv_type_unsigned_long_long_int = yes:no
then
ac_cv_type_long_long_int=no
AC_DEFINE([HAVE_LONG_LONG_INT], 0,
[Define to 1 if the system has the type `long long int'.])
fi
M4_INIT
# Code from Jim Avera <jima@netcom.com>.
# stackovf.c requires:
# 1. Either sigaction with SA_ONSTACK, or sigvec with SV_ONSTACK
# 2. Either sigaltstack or sigstack
# 3. getrlimit, including support for RLIMIT_STACK
AC_CACHE_CHECK([if stack overflow is detectable], [M4_cv_use_stackovf],
[M4_cv_use_stackovf=no
if test "$ac_cv_func_sigaction" = yes || test "$ac_cv_func_sigvec" = yes; then
if test "$ac_cv_func_sigaltstack" = yes || test "$ac_cv_func_sigstack" = yes; then
AC_LINK_IFELSE([AC_LANG_PROGRAM([[
#include <sys/time.h>
#include <sys/resource.h>
#include <signal.h>
]], [[struct rlimit r; getrlimit (RLIMIT_STACK, &r);
#if (!defined(HAVE_SIGACTION) || !defined(SA_ONSTACK)) \
&& (!defined(HAVE_SIGVEC) || !defined(SV_ONSTACK))
choke me /* SA_ONSTACK and/or SV_ONSTACK are not defined */
#endif
]])], [M4_cv_use_stackovf=yes])
fi
fi])
AM_CONDITIONAL([STACKOVF], [test "$M4_cv_use_stackovf" = yes])
if test "$M4_cv_use_stackovf" = yes; then
AC_DEFINE([USE_STACKOVF], [1],
[Define to 1 if using stack overflow detection])
AC_CHECK_TYPES([rlim_t], [],
[AC_DEFINE([rlim_t], [int],
[Define to int if rlim_t is not defined in sys/resource.h])],
[[#include <sys/resource.h>
]])
AC_CHECK_TYPES([stack_t], [],
[AC_DEFINE([stack_t], [struct sigaltstack],
[Define to struct sigaltstack if stack_t is not in signal.h])],
[[#include <signal.h>
]])
AC_CHECK_TYPES([sigcontext], [], [], [[#include <signal.h>
]])
fi
AC_CACHE_CHECK([if system() agrees with pclose()],
[M4_cv_func_system_consistent],
[AC_RUN_IFELSE([AC_LANG_PROGRAM([
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
], [int i1, i2;
FILE *f;
i1 = system ("exit 2");
if (i1 == -1)
return 1;
f = popen ("exit 2", "r");
if (!f)
return 1;
i2 = pclose (f);
return i1 != i2;])],
[M4_cv_func_system_consistent=yes], [M4_cv_func_system_consistent=no],
[AC_COMPILE_IFELSE([
/* EMX on OS/2 defines WEXITSTATUS to be (x>>8)&0xff, and uses that for
pclose(), but for system() it uses x&0xff instead. Otherwise, we assume
your system is sane and that pclose() and system() are consistent in their
values. If this heuristic is wrong for your platform, report it as a bug
to bug-m4@gnu.org. */
#ifdef __EMX__
choke me
#endif
], [M4_cv_func_system_consistent=yes], [M4_cv_func_system_consistent=no])])])
if test "$M4_cv_func_system_consistent" = no ; then
AC_DEFINE([FUNC_SYSTEM_BROKEN], [1],
[Define to 1 if the return value of system() disagrees with pclose().])
fi
dnl Don't let changeword get in our way, if bootstrapping with a version of
dnl m4 that already turned the feature on.
m4_ifdef([changeword], [m4_undefine([changeword])])dnl
AC_MSG_CHECKING([[if changeword is wanted]])
AC_ARG_ENABLE([changeword],
[AS_HELP_STRING([--enable-changeword],
[enable -W and changeword() builtin])],
[if test "$enableval" = yes; then
AC_MSG_RESULT([yes])
AC_DEFINE([ENABLE_CHANGEWORD], [1],
[Define to 1 if the changeword(REGEXP) functionality is wanted])
else
AC_MSG_RESULT([no])
fi], [AC_MSG_RESULT([no])])
M4_WITH_DMALLOC
AC_CONFIG_COMMANDS([stamp-h], [[test -z "$CONFIG_HEADERS" || date > stamp-h]])
AC_CONFIG_FILES([Makefile
doc/Makefile
lib/Makefile
src/Makefile
tests/Makefile
checks/Makefile
examples/Makefile
])
AC_OUTPUT
|
