#include <string.h>  /*strerror */
#include <stdio.h>  /*printf*/
#include <pthread.h> 
#include <stdlib.h>  /*exit*/

int i_thr1 = 1;
int i_thr2 =2;

void *  thr_fn1(void *arg)  {
	printf("thread 1 returning\n");
	return(&i_thr1);
}

void *  thr_fn2(void *arg)  {
	printf("thread 2 exiting\n");
	pthread_exit(&i_thr2);
}

int main(void) {
	int       err;
	pthread_t tid1, tid2;
	void      *tret;

	err = pthread_create(&tid1, NULL, thr_fn1, NULL);
	if (err != 0) {
		printf("can't create thread 1: %s\n", strerror(err));
                exit(-1);
        }
	err = pthread_create(&tid2, NULL, thr_fn2, NULL);
	if (err != 0) {
		printf("can't create thread 2: %s\n", strerror(err));
                exit(-1);
        }
	err = pthread_join(tid1, &tret);
	if (err != 0) {
		printf("can't join with thread 1: %s\n", strerror(err));
                exit(-1);
        }
	printf("thread 1 exit code %i\n", * (int*)tret);
	err = pthread_join(tid2, &tret);
	if (err != 0) {
		printf("can't join with thread 2: %s\n", strerror(err));
                exit(-1);
        }
	printf("thread 2 exit code %i\n", * (int*)tret);
	exit(0);
}