undefined reference to pthread create error

Chemi Saffron

12/6/23, 1:22 PM

When working with POSIX threads in a C program, I found "undefined reference to pthread create" error.

#include <stdio.h> 
#include <stdlib.h>

void *myThreadFun(void *vargp)
{ 
  sleep(1); 
  printf("Printing Sample \n"); 
  return NULL;
}

Although my gcc and g++ compilers are working pretty fine. Moreover, I am compiling this code using this command:

gcc test.c -o test

2228

1 + 1

20.04

Chemi Saffron

12/6/23, 1:41 PM

@steeldriver, edited and provided all the necessary details.

Score:3

Ubuntu

Alice Grace

12/6/23, 1:30 PM

The error “undefined reference to pthread create” is caused when the pthread header is not included in the program file. Ensure that the header file is included properly as follows.

#include <pthread.h>

The other cause is that pthread is not used in the command line while compiling the code. To include the thread while compilation, use the syntax.

gcc -pthread -o threads <cprogram>.c

Found this solution on this post

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Elon Musk

I sit in a Tesla and translated this thread with Ai:

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