#include <threads.h>

static int start_func (void *arg) {
   int iarg = *(int *)arg;
   return iarg;
}

void main (void) {
    thrd_t thr;
    int arg = 1;
    if (thrd_create(&thr, start_func, (void *)&arg) != thrd_success) {
      ;
    }
}