리눅스 pthread 사용시 라이브러리 추가 옵션.

#gcc -o pthread pthread.c -lpthread

#include <unistd.h> 

#include <stdio.h> 

#include <stdlib.h>

#include <pthread.h> 

#define THREADS 3

__thread int tls;

int global;

void *func(void *arg){

int num=(int)arg;

tls = num;

global =(int) num;

sleep(1);

printf("Thread=%d tls=%d global=%d\n",num,tls,global);

}

int main(){

int ret;

pthread_t thread[THREADS];

int num;

for(num=0;num<THREADS;num++){

ret=pthread_create(&thread[num],NULL,&func,(void *)num);

if(ret){

printf("error pthread_create\n");

exit(1);

}

}

for (num=0;num<THREADS;num++){

ret=pthread_join(thread[num],NULL);

if(ret){

printf("error pthread_join\n");

}

}

return 0;

}