转自http://blog.csdn.net/guanyasu/article/details/51866984

#ifndef __CONFIG_H__
#define __CONFIG_H__#define DEBUG/*#undef DEBUG */#ifdef DEBUG
#define debug(...)        \{\fprintf(stderr,"[DEBUG] [%s:%s:%d]",__FILE__,__FUNCTION__,__LINE__);\fprintf(stderr,__VA_ARGS__);\}
#else
#define debug(...)#endif#endif