-#undef __P
-#if defined (__STDC__) && __STDC__
-#define __P(args) args
-#else
-#define __P(args) ()
-#endif
-
-int
- memcasecmp __P((const void *vs1, const void *vs2, size_t n));
+/* Case-insensitive buffer comparator.
+
+ Copyright (C) 1996, 1998, 2003, 2009-2013 Free Software Foundation, Inc.
+
+ This program is free software: you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 3 of the License, or
+ (at your option) any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program. If not, see <http://www.gnu.org/licenses/>. */
+
+/* Written by Jim Meyering. */
+
+#include <stddef.h>
+
+int memcasecmp (const void *vs1, const void *vs2, size_t n) _GL_ATTRIBUTE_PURE;