clock_gettime, clock_getres함수 링크 관련 ㅜㅜ

#include<stdio.h>
#include<time.h>
 
int main()
{
        struct timespec tpend, res;
 
        clock_gettime(CLOCK_REALTIME, &tpend);
        clock_getres(CLOCK_REALTIME, &res);
 
        printf("%ld, %ld\n", res.tv_sec, res.tv_nsec);
}