X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=m4%2Fsignal_h.m4;h=7f61e0b4014838c80c80a4cd7307c1364b4018de;hb=cbd5934b1918d73022d1d1d9904112f3d6d7f187;hp=7a9d29cf76585bf092a64286e217ce0f72634e48;hpb=b4349b948ba2c352187158e241334abda6e473e9;p=pspp

diff --git a/m4/signal_h.m4 b/m4/signal_h.m4
index 7a9d29cf76..7f61e0b401 100644
--- a/m4/signal_h.m4
+++ b/m4/signal_h.m4
@@ -1,4 +1,4 @@
-# signal_h.m4 serial 8
+# signal_h.m4 serial 9
 dnl Copyright (C) 2007, 2008, 2009, 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,
@@ -15,6 +15,12 @@ AC_DEFUN([gl_SIGNAL_H],
 #include <signal.h>
     ]])
   AC_REQUIRE([AC_TYPE_UID_T])
+
+  dnl Check for declarations of anything we want to poison if the
+  dnl corresponding gnulib module is not in use.
+  gl_WARN_ON_USE_PREPARE([[#include <signal.h>
+    ]], [sigaction sigaddset sigdelset sigemptyset sigfillset sigismember
+    sigpending sigprocmask])
 ])
 
 AC_DEFUN([gl_SIGNAL_MODULE_INDICATOR],