Undefined reference to pthread_create in Linux

Question

I picked up the following demo off the web from https://computing.llnl.gov/tutorials/pthreads/

#include 
#include 
#define NU         


        

Answer 1

Acutally, it gives several examples of compile commands used for pthreads codes are listed in the table below, if you continue reading the following tutorial:

https://computing.llnl.gov/tutorials/pthreads/#Compiling

Answer 2

Running from the Linux terminal, what worked for me was compiling using the following command (suppose the c file I want to compile is called test.c):

gcc -o test test.c -pthread

Hope it helps somebody!

Answer 3

Both answers to this question so far are incorrect.
For Linux the correct command is:

gcc -pthread -o term term.c

In general, libraries should follow sources and objects on command line, and -lpthread is not an "option", it's a library specification. On a system with only libpthread.a installed,

gcc -lpthread ...

will fail to link.

Answer 4

In Anjuta, go to the Build menu, then Configure Project. In the Configure Options box, add:

LDFLAGS='-lpthread'

Hope it'll help somebody too...

Answer 5

check man page and you will get.

Compile and link with -pthread.

SYNOPSIS
       #include <pthread.h>

       int pthread_create(pthread_t *thread, const pthread_attr_t *attr,
                          void *(*start_routine) (void *), void *arg);


       Compile and link with -pthread.
       ....

Answer 6

I believe the proper way of adding pthread in CMake is with the following

find_package (Threads REQUIRED)

target_link_libraries(helloworld
    ${CMAKE_THREAD_LIBS_INIT}
)