-# signalblocking.m4 serial 1 (gettext-0.11)
-dnl Copyright (C) 2001-2002 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License. As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# signalblocking.m4 serial 10
+dnl Copyright (C) 2001-2002, 2006-2010 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
# Determine available signal blocking primitives. Three different APIs exist:
# 1) POSIX: sigemptyset, sigaddset, sigprocmask
# 2) SYSV: sighold, sigrelse
# 3) BSD: sigblock, sigsetmask
# For simplicity, here we check only for the POSIX signal blocking.
-AC_DEFUN([gt_SIGNALBLOCKING],
+AC_DEFUN([gl_SIGNALBLOCKING],
[
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
signals_not_posix=
- AC_EGREP_HEADER(sigset_t, signal.h, , signals_not_posix=1)
+ AC_EGREP_HEADER([sigset_t], [signal.h], , [signals_not_posix=1])
if test -z "$signals_not_posix"; then
- AC_CHECK_FUNC(sigprocmask,
- AC_DEFINE(HAVE_POSIX_SIGNALBLOCKING, 1,
- [Define to 1 if you have the sigset_t type and the sigprocmask function.]))
+ AC_CHECK_FUNC([sigprocmask], [gl_cv_func_sigprocmask=1])
fi
+ if test -z "$gl_cv_func_sigprocmask"; then
+ HAVE_POSIX_SIGNALBLOCKING=0
+ AC_LIBOBJ([sigprocmask])
+ gl_PREREQ_SIGPROCMASK
+ fi
+])
+
+# Prerequisites of the part of lib/signal.in.h and of lib/sigprocmask.c.
+AC_DEFUN([gl_PREREQ_SIGPROCMASK],
+[
+ AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+ AC_CHECK_TYPES([sigset_t],
+ [gl_cv_type_sigset_t=yes], [gl_cv_type_sigset_t=no],
+ [#include <signal.h>
+/* Mingw defines sigset_t not in <signal.h>, but in <sys/types.h>. */
+#include <sys/types.h>])
+ if test $gl_cv_type_sigset_t != yes; then
+ HAVE_SIGSET_T=0
+ fi
+ dnl HAVE_SIGSET_T is 1 if the system lacks the sigprocmask function but has
+ dnl the sigset_t type.
+ AC_SUBST([HAVE_SIGSET_T])
])