使用 CMake 链接到 pthread 库（在 CLion 中）

Question

I've looked all over and I can't figure out how to get CLion to link the lpthread library. I know that w/ gcc you can just type -lpthread, but I need to do some debugging in CLion.

Here's my current CMakeLists file:

cmake_minimum_required(VERSION 3.3)

project(lab4)

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++11")

include_directories(/usr/include/)
link_directories(/usr/include/)

set(SOURCE_FILES lab4_v2.c)
add_executable(lab4 ${SOURCE_FILES})

Answer 1

Before CMake 2.8.12:

find_package(Threads REQUIRED)
if(THREADS_HAVE_PTHREAD_ARG)
  set_property(TARGET my_app PROPERTY COMPILE_OPTIONS "-pthread")
  set_property(TARGET my_app PROPERTY INTERFACE_COMPILE_OPTIONS "-pthread")
endif()
if(CMAKE_THREAD_LIBS_INIT)
  target_link_libraries(my_app "${CMAKE_THREAD_LIBS_INIT}")
endif()

If you have CMAKE 2.8.12+:

find_package(Threads REQUIRED)
if(THREADS_HAVE_PTHREAD_ARG)
  target_compile_options(my_app PUBLIC "-pthread")
endif()
if(CMAKE_THREAD_LIBS_INIT)
  target_link_libraries(my_app "${CMAKE_THREAD_LIBES_INIT}")
endif()

If you have CMake 3.1.0+

set(THREADS_PREFER_PTHREAD_FLAG ON)
find_package(Threads REQUIRED)
target_link_libraries(my_app Threads::Threads)

If you want to use one of the first two methods with CMake 3.1+, you will need:

set(THREADS_PREFER_PTHREAD_FLAG ON)

Info taken from video by Anastasia Kazakova

Answer 2

对于 C：

set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pthread")

Answer 3

你应该使用target_link_libraries ：

target_link_libraries(lab4 pthread)

Answer 4

Answer as of CLion 2018.2 and the bundled cmake version of 3.12.0

I used other answers in this thread to modify my CMakeLists.txt, and ultimately found I had to add a SECOND line with set() to make this work. My file looks like the following:

cmake_minimum_required(VERSION 3.12)
project(thread_test_project C)

set(CMAKE_C_STANDARD 99)
set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -pthread")

include_directories(.)

add_executable(thread_test
        thread_test.c)

Answer 5

对于 C++ 使用

set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -std=c++14 -pthread" )