1#define _GNU_SOURCE
 2#include "time32.h"
 3#include <time.h>
 4#include <errno.h>
 5#include <stdint.h>
 6
 7time32_t __time32gm(struct tm *tm)
 8{
 9	time_t t = timegm(tm);
10	if (t < INT32_MIN || t > INT32_MAX) {
11		errno = EOVERFLOW;
12		return -1;
13	}
14	return t;
15}