-/* Informative messages, but we proceed. */
-
-void warn_at (location_t location, const char *format, ...)
- __attribute__ ((__format__ (__printf__, 2, 3)));
-
-/* Something bad happen, but let's continue and die later. */
+void warn (char const *format, ...)
+ __attribute__ ((__format__ (__printf__, 1, 2)));