pollution: asctime_r
__attribute__((__warning__("asctime_r() is obsolete, use strftime()"))) char* asctime_r(const struct tm* restrict, char* restrict); 

pollution: buf
pollution: ctime_r
__attribute__((__warning__("ctime_r() is obsolete, use strftime()"))) char* ctime_r(const time_t* clock, char* buf); 

pollution: timegm
time_t timegm(struct tm*);