Provide a program_name variable on platforms other than glibc.

[gnulib.git] / m4 / signalblocking.m4

diff --git a/m4/signalblocking.m4 b/m4/signalblocking.m4
index 1a88f52..2c03df4 100644 (file)
--- a/m4/signalblocking.m4
+++ b/m4/signalblocking.m4
@@ -1,23 +1,40 @@
-# 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 4
+dnl Copyright (C) 2001-2002, 2006 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],
 [
   signals_not_posix=
   AC_EGREP_HEADER(sigset_t, signal.h, , signals_not_posix=1)
   if test -z "$signals_not_posix"; then
-    AC_CHECK_FUNC(sigprocmask,
-      AC_DEFINE(HAVE_POSIX_SIGNALBLOCKING, 1,
-       [Define to 1 if you have the sigset_t type and the sigprocmask function.]))
+    AC_CHECK_FUNC(sigprocmask, [gl_cv_func_sigprocmask=1])
   fi
+  if test -n "$gl_cv_func_sigprocmask"; then
+    AC_DEFINE([HAVE_POSIX_SIGNALBLOCKING], 1,
+      [Define to 1 if you have the sigset_t type and the sigprocmask function.])
+  else
+    AC_LIBOBJ([sigprocmask])
+    gl_PREREQ_SIGPROCMASK
+  fi
+])
+
+# Prerequisites of lib/sigprocmask.h and lib/sigprocmask.c.
+AC_DEFUN([gl_PREREQ_SIGPROCMASK], [
+  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
+    AC_DEFINE([HAVE_SIGSET_T], [1],
+      [Define to 1 if you lack the sigprocmask function but have the sigset_t type.])
+  fi
+  AC_CHECK_FUNCS_ONCE(raise)
 ])