acl: allow cross-compilation to Gentoo

[gnulib.git] / m4 / mempcpy.m4

diff --git a/m4/mempcpy.m4 b/m4/mempcpy.m4
index a5ed8de..a48f2d1 100644 (file)
--- a/m4/mempcpy.m4
+++ b/m4/mempcpy.m4
@@ -1,19 +1,22 @@
-# mempcpy.m4 serial 1
-dnl Copyright (C) 2003 Free Software Foundation, Inc.
-dnl This file is free software, distributed under the terms of the GNU
-dnl General Public License.  As a special exception to the GNU General
-dnl Public License, this file may be distributed as part of a program
-dnl that contains a configuration script generated by Autoconf, under
-dnl the same distribution terms as the rest of that program.
+# mempcpy.m4 serial 11
+dnl Copyright (C) 2003-2004, 2006-2007, 2009-2013 Free Software Foundation,
+dnl 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.
 
 AC_DEFUN([gl_FUNC_MEMPCPY],
 [
   dnl Persuade glibc <string.h> to declare mempcpy().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
 
-  AC_REPLACE_FUNCS(mempcpy)
+  dnl The mempcpy() declaration in lib/string.in.h uses 'restrict'.
+  AC_REQUIRE([AC_C_RESTRICT])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_CHECK_FUNCS([mempcpy])
   if test $ac_cv_func_mempcpy = no; then
-    gl_PREREQ_MEMPCPY
+    HAVE_MEMPCPY=0
   fi
 ])