pollution: daylight
extern int daylight; 

pollution: timezone
extern long timezone; 

pollution: strptime
char *strptime(const char *__restrict, const char *__restrict, struct tm *__restrict); 

pollution: asctime_r
char *asctime_r(const struct tm *__restrict, char *__restrict) __attribute__ ((__bounded__(__minbytes__,2,26))); 

pollution: ctime_r
char *ctime_r(const time_t *, char *) __attribute__ ((__bounded__(__minbytes__,2,26))); 

pollution: CLOCKS_PER_SEC
#define CLOCKS_PER_SEC 100