Re: work with threads

[Antonio Muñoz]

This is the program code:

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <pthread.h>

unsigned short c_timer;

void *thread_function(void *arg)

{

while(c_timer)

{

sleep(1);

c_timer–;

}

return NULL;

}

int main (void)

{

pthread_t mythread;

c_timer = 20;

if ( pthread_create( &mythread, NULL, thread_function, NULL) )

{

printf(“Error.”);

abort();

}

printf(“20 sec. for exit”);

while(c_timer);

printf(“Goodbye”);

}

to build:

– source env-oe.sh

– export PATH=${OETREE}/build/tmp/sysroots/i686-linux/usr/armv5te/bin:$PATH

– arm-corecdp-linux-gnueabi-gcc -o test test.c

This is the result of the build:

/tmp/cc5EYUVc.o: In function `main’:

test.c:(.text+0x8c): undefined reference to `pthread_create’

collect2: ld returned 1 exit status

Thanks