test.cpp

/* confdefs.h */
    #include <errno.h>
    #include <pthread.h>
    #include <signal.h>

    void *thread1_func(void *p_arg)
    {
            errno = 1;
    }

int
main ()
{

    errno = 0;
    pthread_t t1;
    pthread_create(&t1, NULL, thread1_func, NULL);
    pthread_join(t1, NULL);
    return errno;

  ;
  return 0;
}