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pthread_attr_t attr;
pthread_attr_init( &attr );
//pthread_attr_setstacksize(&attr,10*1024*1024);
pthread_t tid;
err = pthread_create(&tid, &attr, start_thread, NULL);
if (err) {
perror("thread create error");
return -1;
}
pthread_join(tid,NULL);
pthread_attr_getstacksize(&attr,&sizes);
cout << sizes << endl;