Segmentation fault on pjsip

[waleedot2003@xxxxxxxxx (spider)]

hi
sorry for duplicating the thread but i couldn't find my old post :)
i use this code to resolve SRV record in my DNS server but
Segmentation fault occur when i executing the app .

#include <pjsip.h>
#include <pjlib.h>
#include <pjlib-util.h>
#include <pjsip/sip_types.h>

int main(){

  pj_status_t status ;
  pj_pool_t *pool;
  pj_dns_resolver *resv;
  pjsip_endpoint *endpt;
  pj_str_t nameserver = pj_str("_sip._udp.myDns.com");
  pj_uint16_t port = 5060;


  pool = pjsip_endpt_create_pool(endpt, NULL, 4000, 4000);
//Segmentation fault here
  status = pjsip_endpt_create_resolver(endpt, &resv);
  pj_dns_resolver_set_ns(resv, 1, &nameserver, &port);
  pjsip_endpt_set_resolver(endpt, resv);


  return 0 ;
}