-extern void pedwarn0 (const char *, ...) ATTRIBUTE_GCC_DIAG(1,2);
-/* Pass one of the OPT_W* from options.h as the first parameter. */
-extern void pedwarn (int, const char *, ...) ATTRIBUTE_GCC_DIAG(2,3);
-extern void permerror (const char *, ...) ATTRIBUTE_GCC_DIAG(1,2);
-extern void permerror_at (location_t, const char *, ...)
- ATTRIBUTE_GCC_DIAG(2,3);
+/* Pass one of the OPT_W* from options.h as the second parameter. */
+extern bool pedwarn (location_t, int, const char *, ...)
+ ATTRIBUTE_GCC_DIAG(3,4);
+extern bool permerror (location_t, const char *, ...) ATTRIBUTE_GCC_DIAG(2,3);