signal, spawn: use link warnings

[pspp] / m4 / signal_h.m4

diff --git a/m4/signal_h.m4 b/m4/signal_h.m4
index e69befd0eda57258d37e0ba2ea10ae9c9270d069..df6a3ba8682efd540f3f7c901c668166ba36429a 100644 (file)
--- a/m4/signal_h.m4
+++ b/m4/signal_h.m4
@@ -1,4 +1,4 @@
-# signal_h.m4 serial 7
+# signal_h.m4 serial 8
 dnl Copyright (C) 2007, 2008, 2009 Free Software Foundation, Inc.
 dnl This file is free software; the Free Software Foundation
 dnl gives unlimited permission to copy and/or distribute it,
@@ -14,6 +14,7 @@ AC_DEFUN([gl_SIGNAL_H],
     [HAVE_TYPE_VOLATILE_SIG_ATOMIC_T=0], [[
 #include <signal.h>
     ]])
+  AC_REQUIRE([AC_TYPE_UID_T])
 ])
 
 AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],