* lib/sys_time_.h: Use a recursion-safe inclusion guard rather than

[gnulib.git] / m4 / strdup.m4

diff --git a/m4/strdup.m4 b/m4/strdup.m4
index 9964d15..8796e9e 100644 (file)
--- a/m4/strdup.m4
+++ b/m4/strdup.m4
@@ -1,15 +1,20 @@
-# strdup.m4 serial 4
-dnl Copyright (C) 2002, 2003, 2004 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.
+# strdup.m4 serial 9
+
+dnl Copyright (C) 2002, 2003, 2004, 2005, 2006, 2007 Free Software
+dnl 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_STRDUP],
 [
+  AC_REQUIRE([gl_HEADER_STRING_H_DEFAULTS])
   AC_REPLACE_FUNCS(strdup)
   AC_CHECK_DECLS_ONCE(strdup)
+  if test $ac_cv_have_decl_strdup = no; then
+    HAVE_DECL_STRDUP=0
+  fi
   gl_PREREQ_STRDUP
 ])