timegm
time_t timegm(struct tm * const);
t = timegm(&tm);
ts->tv_sec = timegm(&tm);
toktime = timegm(&tm);
time_t timegm(struct tm *);
#if !HAVE_DECL_TIMEGM && !defined timegm
time_t timegm(struct tm *);
extern time_t timegm(struct tm *);
time_t t = timegm(tm);
time_t timelocal(), timegm();