-extern int yylex __P((void));
-extern void yyerror __P((char *, ...));
-extern void yywarn __P((char *, ...));
+extern int yylex (void);
+extern void yyerror (const char *);
+extern void yywarn (const char *);
+extern void racoon_yyerror (const char *, ...);
+extern void racoon_yywarn (const char *, ...);