X-Git-Url: http://erislabs.net/gitweb/?a=blobdiff_plain;f=m4%2Fstrnlen.m4;h=d8307eda4acc8ab1e3ea35d0897e5d4313e838c5;hb=a012b399fc9ec00d3f27ffcfd25729053791d42f;hp=989ff49f753438a79b13224c9462130e6e830d91;hpb=e9238130e4d57cf4b76c67332aa0d8b2a945ca35;p=gnulib.git

diff --git a/m4/strnlen.m4 b/m4/strnlen.m4
index 989ff49f7..d8307eda4 100644
--- a/m4/strnlen.m4
+++ b/m4/strnlen.m4
@@ -1,19 +1,23 @@
-# strnlen.m4 serial 3
-dnl Copyright (C) 2002-2003 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.
+# strnlen.m4 serial 9
+dnl Copyright (C) 2002-2003, 2005-2007 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.
 
 AC_DEFUN([gl_FUNC_STRNLEN],
 [
   dnl Persuade glibc <string.h> to declare strnlen().
-  AC_REQUIRE([AC_GNU_SOURCE])
+  AC_REQUIRE([AC_USE_SYSTEM_EXTENSIONS])
+
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
+  AC_CHECK_DECLS_ONCE([strnlen])
+  if test $ac_cv_have_decl_strnlen = no; then
+    HAVE_DECL_STRNLEN=0
+  fi
 
   AC_FUNC_STRNLEN
   if test $ac_cv_func_strnlen_working = no; then
-    # This is necessary because automake-1.6.1 doens't understand
+    # This is necessary because automake-1.6.1 doesn't understand
     # that the above use of AC_FUNC_STRNLEN means we may have to use
     # lib/strnlen.c.
     #AC_LIBOBJ(strnlen)