int ev_set_debug(struct event_context *ev,
void (*debug)(void *context, enum ev_debug_level level,
- const char *fmt, va_list ap),
+ const char *fmt, va_list ap) PRINTF_ATTRIBUTE(3,0),
void *context);
int ev_set_debug_stderr(struct event_context *ev);
void ev_debug(struct event_context *ev, enum ev_debug_level level, const char *fmt, ...);