X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;ds=sidebyside;f=m4%2Fstrsignal.m4;h=5e15e7447e7dd4b008b518e87aa348203bc03477;hb=80a029602f5b2707ca8d2487843ecb9e0df74a6a;hp=9c9c4110baff7254d0a50d6c4248e3837cf7256b;hpb=f76a70dc0244757b8aa890113e41fb2fe1da2244;p=gnulib.git

diff --git a/m4/strsignal.m4 b/m4/strsignal.m4
index 9c9c4110b..5e15e7447 100644
--- a/m4/strsignal.m4
+++ b/m4/strsignal.m4
@@ -1,5 +1,5 @@
-# strsignal.m4 serial 7
-dnl Copyright (C) 2008-2011 Free Software Foundation, Inc.
+# strsignal.m4 serial 8
+dnl Copyright (C) 2008-2012 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.
@@ -53,6 +53,7 @@ AC_DEFUN([gl_FUNC_STRSIGNAL],
 
 # Prerequisites of lib/strsignal.c.
 AC_DEFUN([gl_PREREQ_STRSIGNAL], [
+  AC_CHECK_HEADERS_ONCE([unistd.h])
   AC_REQUIRE([AC_DECL_SYS_SIGLIST])
   AC_CHECK_DECLS([_sys_siglist], [], [], [[#include <signal.h>]])
 ])