
#define CLK_TCK	((clock_t)__sysconf(2))
#define CLOCK_REALTIME	0
#define TIMER_ABSTIME	1
#define CLOCKS_PER_SEC	1000000l

struct tm
{
  int tm_sec;
  int tm_min;
  int tm_hour;
  int tm_mday;
  int tm_mon;
  int tm_year;
  int tm_wday;
  int tm_yday;
  int tm_isdst;
  long tm_gmtoff;
  char *tm_zone;
}
 ;
struct itimerspec
{
  struct timespec it_interval;
  struct timespec it_value;
}
 ;
