--- a/src/string_func.h	Sun Aug 24 13:50:31 2008 +0000
+++ b/src/string_func.h	Sun Aug 24 17:02:21 2008 +0000
@@ -156,4 +156,9 @@
 	;
 }
 
-#endif /* STRING_FUNC_H */
+#ifndef _GNU_SOURCE
+/* strndup is a GNU extension */
+char *strndup(const char *s, size_t len);
+#endif /* WIN32 || SUNOS */
+
+#endif /* !_GNU_SOURCE */