(gl_DIRNAME): Use gl_DOUBLE_SLASH_ROOT.

diff --git a/m4/dirname.m4 b/m4/dirname.m4
index e36937d8fc8801e93d6e02f4bf3d7050cf4bf9f2..f3412ad08008768b9c2134b39b50a6f21a0db4c8 100644 (file)
--- a/m4/dirname.m4
+++ b/m4/dirname.m4
@@ -1,5 +1,5 @@
-# dirname.m4 serial 5
-dnl Copyright (C) 2002, 2003, 2004, 2005 Free Software Foundation, Inc.
+#serial 6   -*- autoconf -*-
+dnl Copyright (C) 2002-2006 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.
@@ -11,6 +11,7 @@ AC_DEFUN([gl_DIRNAME],
 
   dnl Prerequisites of lib/dirname.h.
   AC_REQUIRE([gl_AC_DOS])
+  AC_REQUIRE([gl_DOUBLE_SLASH_ROOT])
 
   dnl No prerequisites of lib/basename.c, lib/dirname.c, lib/stripslash.c.
 ])