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dnl Autoconf configure snippets for common.
dnl Copyright (C) 1995-2015 Free Software Foundation, Inc.
dnl
dnl This file is part of GDB.
dnl
dnl This program is free software; you can redistribute it and/or modify
dnl it under the terms of the GNU General Public License as published by
dnl the Free Software Foundation; either version 3 of the License, or
dnl (at your option) any later version.
dnl
dnl This program is distributed in the hope that it will be useful,
dnl but WITHOUT ANY WARRANTY; without even the implied warranty of
dnl MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
dnl GNU General Public License for more details.
dnl
dnl You should have received a copy of the GNU General Public License
dnl along with this program. If not, see <http://www.gnu.org/licenses/>.
dnl Invoke configury needed by the files in 'common'.
AC_DEFUN([GDB_AC_COMMON], [
AC_HEADER_STDC
AC_FUNC_ALLOCA
dnl Note that this requires codeset.m4, which is included
dnl by the users of common.m4.
AM_LANGINFO_CODESET
AC_CHECK_HEADERS(linux/perf_event.h locale.h memory.h signal.h dnl
sys/resource.h sys/socket.h sys/syscall.h dnl
sys/un.h sys/wait.h dnl
thread_db.h wait.h)
AC_CHECK_FUNCS([fdwalk getrlimit pipe pipe2 socketpair])
AC_CHECK_DECLS([strerror, strstr])
dnl Check if sigsetjmp is available. Using AC_CHECK_FUNCS won't
dnl do since sigsetjmp might only be defined as a macro.
AC_CACHE_CHECK([for sigsetjmp], gdb_cv_func_sigsetjmp,
[AC_TRY_COMPILE([
#include <setjmp.h>
], [sigjmp_buf env; while (! sigsetjmp (env, 1)) siglongjmp (env, 1);],
gdb_cv_func_sigsetjmp=yes, gdb_cv_func_sigsetjmp=no)])
if test $gdb_cv_func_sigsetjmp = yes; then
AC_DEFINE(HAVE_SIGSETJMP, 1, [Define if sigsetjmp is available. ])
fi
# Assume we'll default to using the included libiberty regex.
gdb_use_included_regex=yes
# However, if the system regex is GNU regex, then default to *not*
# using the included regex.
AC_CACHE_CHECK(
[for GNU regex],
[gdb_cv_have_gnu_regex],
[AC_TRY_COMPILE(
[#include <gnu-versions.h>],
[#define REGEX_INTERFACE_VERSION 1
#if _GNU_REGEX_INTERFACE_VERSION != REGEX_INTERFACE_VERSION
# error "Version mismatch"
#endif],
gdb_cv_have_gnu_regex=yes,
gdb_cv_have_gnu_regex=no)])
if test $gdb_cv_have_gnu_regex = yes; then
gdb_use_included_regex=no
fi
AC_ARG_WITH(included-regex,
AS_HELP_STRING([--without-included-regex], [don't use included regex; this is the default on systems with version 2 of the GNU C library (use with caution on other system)]),
gdb_with_regex=$withval,
gdb_with_regex=$gdb_use_included_regex)
if test "$gdb_with_regex" = yes; then
AC_DEFINE(USE_INCLUDED_REGEX, 1,
[Define to 1 if the regex included in libiberty should be used.])
fi
])
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