undefined reference to `__ns_initparse' 에러가 발생합니다.

/*
MX 레코드 반환
 
gcc -lresolv mx_01.c
*/
 
 
 
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <netinet/in.h>
#include <resolv.h>
#include <netdb.h>
#include <arpa/nameser.h> 
 
 
int main (int argc, char *argv[])
{
	unsigned char maAnswer[PACKETSZ];
	char dispbuf[PACKETSZ];
	ns_msg msg;
	ns_rr rr;
	int i, l, nAnswerLen;
 
 
	// MX RECORD
	nAnswerLen = res_query("naver.com", ns_c_any, ns_t_mx, maAnswer, sizeof(maAnswer));
 
	ns_initparse(maAnswer, nAnswerLen, &msg);
	l = ns_msg_count(msg, ns_s_an);
	for (i = 0; i < l; i++)
	{
		ns_parserr(&msg, ns_s_an, i, &rr);
		ns_sprintrr(&msg, &rr, NULL, NULL, dispbuf, sizeof(dispbuf));
		printf ("%s\n", dispbuf);
	}
 
 
	return 0;
}