AIX 7.2 GLib-GObject signal incoming is invalid

I have problem with glib2.56.1-2 from Linux toolbox. I have simple TCP server example I have found:

int main (int argc, char *argv[])
{
  GError * error = NULL;

  /* create the new socketservice */
  GSocketService* service = g_socket_service_new ();

  /* connect to the port */
  struct sockaddr_in serv_addr;
  memset(&serv_addr, 0x0, sizeof(serv_addr));
  serv_addr.sin_family = AF_INET;
  serv_addr.sin_addr.s_addr = htonl(INADDR_ANY);
  serv_addr.sin_port = htons(8000);

  g_socket_listener_add_address ((GSocketListener*)service,
    g_socket_address_new_from_native(&serv_addr, sizeof(serv_addr)),
                                     G_SOCKET_TYPE_STREAM,
                                     G_SOCKET_PROTOCOL_TCP,
                                     NULL,
                                     NULL,
                                     &error);

  /* listen to the 'incoming' signal */
  g_signal_connect (service,
                "incoming",
                G_CALLBACK (incoming_callback),
                NULL);

  /* start the socket service */
  g_socket_service_start (service);

  /* enter mainloop */
  g_print ("Waiting for client!\n");
  GMainLoop *loop = g_main_loop_new(NULL, FALSE);
  g_main_loop_run(loop);

  return 0;
}

But it gives me following warning:

(process:9633862): GLib-GObject-WARNING **: 12:48:11.025: gsignal.c:2523: signal 'incoming' is invalid for instance '110015730' of type 'GSocketService'

Connection seems to be opended, but it is not possible to handle incoming data due to signal warning you see above. Do you have any idea?

Regards, Jiri.

I removed -Wl,-G from linker flags. That worked fine. Thank you all.