-extern void warning PARAMS ((const char *format, ...)) ATTRIBUTE_PRINTF_1;
-extern void error PARAMS ((const char *format, ...)) ATTRIBUTE_PRINTF_1;
-extern void fatal PARAMS ((const char *format, ...))
- ATTRIBUTE_PRINTF_1 ATTRIBUTE_NORETURN;
+#ifndef GCC_ERRORS_H
+#define GCC_ERRORS_H
+
+/* The first parameter is for compatibility with the non-generator
+ version of warning(). For those, you'd pass an OPT_W* value from
+ options.h, but in generator programs it has no effect, so it's OK
+ to just pass zero for calls from generator-only files. */
+extern void warning (int, const char *, ...) ATTRIBUTE_PRINTF_2;
+extern void error (const char *, ...) ATTRIBUTE_PRINTF_1;
+extern void fatal (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF_1;
+extern void internal_error (const char *, ...) ATTRIBUTE_NORETURN ATTRIBUTE_PRINTF_1;
+extern const char *trim_filename (const char *);