c - zmq_socket() is giving segmentation fault -

i learning zeromq , have following test code:

void *context = (void *)zmq_ctx_new();  if (context == null) {     printf("context null\n"); } else {     printf("context created successfully\n"); }  printf("connecting 0mq server\n"); void *responder = zmq_socket (context, zmq_req);  printf("got socket\n");  if (responder == null) {    printf("responder null\n"); } else {    printf("responder created successfully\n"); } 

when run code, crashes when zmq_socket() called. here output:

starting 0mq server context created connecting 0mq server segmentation fault (core dumped)

i'm not sure why zmq_socket() fails. have tried move zmq library in beginning of linking series in makefile. still fails.

any highly appreciated.

change

void context = (void)zmq_ctx_new(); 

into

void *context = (void *)zmq_ctx_new(); 

and, tried code, void context = (void) zmq_ctx_new() cause compile error.

here code can work on osx.

gcc -o cli client.c -lzmq gcc -o srv server.c -lzmq 

client.c:

#include <zmq.h> #include <string.h> #include <stdio.h> #include <unistd.h>  int main (void) {     printf ("connecting hello world server…\n");     void *context = (void *)zmq_ctx_new ();     void *requester = zmq_socket (context, zmq_req);     zmq_connect (requester, "tcp://localhost:5555");      int request_nbr;     (request_nbr = 0; request_nbr != 10; request_nbr++) {         char buffer [10];         char snd[] = "hello";         printf ("sending hello %d…\n", request_nbr);         zmq_send (requester, snd, sizeof(snd), 0);         zmq_recv (requester, buffer, 10, 0);         printf ("received world %d\n", request_nbr);     }     zmq_close (requester);     zmq_ctx_destroy (context);     return 0; } 

server.c:

#include <zmq.h> #include <stdio.h> #include <unistd.h> #include <string.h> #include <assert.h>  int main (void) {        //  socket talk clients     void *context = zmq_ctx_new ();      void *responder = zmq_socket (context, zmq_rep);     int rc = zmq_bind (responder, "tcp://*:5555");     assert (rc == 0);       while (1) {         int  nrecv;         char buffer [10];         nrecv = zmq_recv (responder, buffer, 10, 0);          printf ("[%d] received %s\n", nrecv, buffer);         sleep (1);          //  'work'         zmq_send (responder, "world", 5, 0);      }        return 0; }