I have a small a program that should start a 2nd Thread. the problem is that, when try to make an executable file of this program using make. I get :

 engine@ubuntu:~/Desktop/Lecture$ make thread

 cc     thread.c   -o thread

 thread.c: In function ‘main’:

  thread.c:10:2: error: unknown type name ‘pthread’  .............

here is my code :

#include <stdio.h>

#include <stdlib.h>

#include <pthread.h>

#include <errno.h>



void *func(void*);



int main(){



pthread tid;

if (pthread_create(&tid,NULL,fun,NULL)!= 0 ){

    printf("error by _ pthread 

");

}

printf ( "thread output1 

");

sleep(1);

return EXIT_SUCCESS;

  }  



 void *fun(void* data){

printf("thread output2 

")

  }

I don't think that program is wrong, it maybe the way I'm running the make command ?

any Idea why do I get this.
thanks in advance for your help