X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fsigaction.m4;h=3a3ed9f24db57916ab3a32aabe8b8b44b04ca1c8;hb=22d7496bac7d391faff10755b17889ecd2f604d4;hp=869c8168dee931dbb31d7d230d9db92b5a5f3e6d;hpb=50fe845c936e712ce3de7ee20eed51c033ae43a7;p=gnulib.git

diff --git a/m4/sigaction.m4 b/m4/sigaction.m4
index 869c8168d..3a3ed9f24 100644
--- a/m4/sigaction.m4
+++ b/m4/sigaction.m4
@@ -1,4 +1,4 @@
-# sigaction.m4 serial 2
+# sigaction.m4 serial 5
 dnl Copyright (C) 2008 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -7,13 +7,17 @@ dnl with or without modifications, as long as this notice is preserved.
 # Determine if sigaction interface is present.
 AC_DEFUN([gl_SIGACTION],
 [
-  dnl Due to autoconf conventions, we can't tell if HAVE_SIGACTION
-  dnl means we have the type or means we have the function.  We assume
-  dnl that all implementations either have both or neither.
-  AC_REPLACE_FUNCS([sigaction])
-  if test $ac_cv_func_sigaction = no ; then
+  AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
+  AC_CHECK_FUNCS_ONCE([sigaction])
+  if test $ac_cv_func_sigaction = yes; then
+    AC_CHECK_MEMBERS([struct sigaction.sa_sigaction], , ,
+                     [[#include <signal.h>]])
+    if test $ac_cv_member_struct_sigaction_sa_sigaction = no; then
+      HAVE_STRUCT_SIGACTION_SA_SIGACTION=0
+    fi
+  else
     HAVE_SIGACTION=0
-    AC_SUBST([HAVE_SIGACTION])
+    AC_LIBOBJ([sigaction])
     gl_PREREQ_SIGACTION
   fi
 ])
@@ -24,13 +28,18 @@ AC_DEFUN([gl_PREREQ_SIGACTION],
   AC_REQUIRE([gl_SIGNAL_H_DEFAULTS])
   AC_REQUIRE([AC_C_RESTRICT])
   AC_REQUIRE([AC_TYPE_UID_T])
+  AC_REQUIRE([gl_PREREQ_SIG_HANDLER_H])
   AC_CHECK_FUNCS_ONCE([sigaltstack siginterrupt])
   AC_CHECK_TYPES([siginfo_t], [], [], [[
 #include <signal.h>
   ]])
   if test $ac_cv_type_siginfo_t = no; then
     HAVE_SIGINFO_T=0
-    AC_SUBST([HAVE_SIGINFO_T])
   fi
-  gl_PREREQ_SIG_HANDLER_H
+])
+
+# Prerequisites of lib/sig-handler.h.
+AC_DEFUN([gl_PREREQ_SIG_HANDLER_H],
+[
+  AC_REQUIRE([AC_C_INLINE])
 ])