fdl.texi from gnustandards

[gnulib.git] / m4 / signalblocking.m4

diff --git a/m4/signalblocking.m4 b/m4/signalblocking.m4
index fe91f29..4459815 100644 (file)
--- a/m4/signalblocking.m4
+++ b/m4/signalblocking.m4
@@ -1,5 +1,5 @@
-# signalblocking.m4 serial 1 (gettext-0.11)
-dnl Copyright (C) 2001-2002 Free Software Foundation, Inc.
+# 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.
@@ -9,13 +9,34 @@ dnl with or without modifications, as long as this notice is preserved.
 # 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])
 ])