Thread Hello World

/*
 * File thread_hello.c
 * Compiling: gcc -o thread-hello thread_hello.c -lpthread
 */
#include <stdio.h>
#include <pthread.h>

void *
print_hello (void * arg)
{
  printf ("Hello World\n");
  return NULL;
}

int 
main (void)
{
  pthread_t thread_1_id;
  pthread_create (&thread_1_id, NULL, &print_hello, NULL);
  /*
   * Main need be the last funtion to return
   */
  pthread_join (thread_1_id, NULL);
  return 0;
}