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

For Linux the correct command is:

gcc -o term term.c -lpthread

1. you have to put -lpthread just after the compile command,this command will tell to the compiler to execute program with pthread.h library.
2. gcc -l links with a library file.Link -l with library name without the lib prefix.

Answer 2

If you are using cmake, you can use:

add_compile_options(-pthread)

Or

SET(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -pthread")

Answer 3

in eclipse

properties->c/c++Build->setting->GCC C++ linker->libraries in top part add "pthread"

Answer 4

you need only Add "pthread" in proprieties=>C/C++ build=>GCC C++ Linker=>Libraries=> top part "Libraries(-l)". thats it

Answer 5

In Visual Studio 2019 specify -pthread in the property pages for the project under:

Linker -> Command Line -> Additional Options

Type in -pthread in the textbox.

Answer 6

Sometimes, if you use multiple library, check the library dependency. (e.g. -lpthread -lSDL... <==> ... -lSDL -lpthread)