extern void set_warn_routine(void (*routine)(const char *warn, va_list params));
extern void (*get_warn_routine(void))(const char *warn, va_list params);
extern void set_die_is_recursing_routine(int (*routine)(void));
-extern void set_error_handle(FILE *);
extern int starts_with(const char *str, const char *prefix);
#define HAVE_VARIADIC_MACROS 1
#endif
+#ifdef HAVE_VARIADIC_MACROS
+__attribute__((format (printf, 3, 4))) NORETURN
+void BUG_fl(const char *file, int line, const char *fmt, ...);
+#define BUG(...) BUG_fl(__FILE__, __LINE__, __VA_ARGS__)
+#else
+__attribute__((format (printf, 1, 2))) NORETURN
+void BUG(const char *fmt, ...);
+#endif
+
/*
* Preserves errno, prints a message, but gives no warning for ENOENT.
* Returns 0 on success, which includes trying to unlink an object that does