attempting to fix sa_handler signature for IRIX

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_2_BRANCH@7024 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

configure.in

@@ -2358,6 +2358,30 @@ if test "$wxUSE_ON_FATAL_EXCEPTION" = "yes" -a "$wxUSE_UNIX" = "yes"; then
         AC_MSG_WARN([No POSIX signal functions on this system, wxApp::OnFatalException will not be called])
         wxUSE_ON_FATAL_EXCEPTION=no
     fi
+
+    if test "$wxUSE_ON_FATAL_EXCEPTION" = "yes"; then
+      AC_LANG_SAVE
+      AC_LANG_CPLUSPLUS
+
+      AC_CACHE_CHECK([for sa_handler type], wx_cv_type_sa_handler,
+      [
+        AC_TRY_COMPILE([#include <signal.h>],
+                     [
+                        extern void testSigHandler(int);
+
+                        struct sigaction sa;
+                        sa.sa_handler = testSigHandler;
+                     ], [
+                        wx_cv_type_sa_handler=int
+                     ], [
+                        wx_cv_type_sa_handler=void
+                     ])
+      ])
+
+      AC_LANG_RESTORE
+
+      AC_DEFINE_UNQUOTED(wxTYPE_SA_HANDLER, $wx_cv_type_sa_handler)
+    fi
 fi
 
 dnl check for vfork() (even if it's the same as fork() in modern Unices)