undefined reference to `pthread_create'/usr/bin/ld: Matrix.c:(.text+0x2e4): undefined reference to `pthread_join' code example

Example 1: undefined reference to `pthread_create' c++

add_compile_options(-pthread)

Example 2: undefined reference to `pthread_create' c++

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