Question

cmake文件

cmake_minimum_required(VERSION 3.6)
    project(producer)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -g -pthread")

add_executable(server wrappers.h wrappers.c server.c request.h request.c)

错误消息

`CMakeFiles/server.dir/wrappers.c.o: In function Pthread_create':
    /home/user/ClionProjects/producer/wrappers.c:570: undefined reference to `pthread_create'
    CMakeFiles/server.dir/wrappers.c.o: In function `Pthread_join':
    /home/user/ClionProjects/producer/wrappers.c:645: undefined reference to `pthread_join'
    CMakeFiles/server.dir/wrappers.c.o: In function `Pthread_cancel':
    /home/user/ClionProjects/producer/wrappers.c:653: undefined reference to `pthread_cancel'
    collect2: error: ld returned 1 exit status
    make[3]: *** [server] Error 1
    make[2]: *** [CMakeFiles/server.dir/all] Error 2
    make[1]: *** [CMakeFiles/server.dir/rule] Error 2
    make: *** [server] Error 2

wrapper.c包含wrapper.h，其中包含pthread.h

我忽略了一些明显的东西，但我不知道是什么。我尝试了set，add_library和install命令，但从来没有输出比这更少的错误。

编辑：这是固定文件。

cmake_minimum_required(VERSION 3.6)
project(producer)
set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} -Wall -g -lpthread")
add_library(wrapper wrapper.h wrapper.c)
add_library(cs537 cs537.h cs537.c)
add_library(request request.h request.c)
add_executable(server server.c)
target_link_libraries(server request wrapper -lpthread)

Answer 1

这是一个链接器错误，你需要在链接器中使用-pthread，直接：

target_link_libraries(server -lpthread)

或更多跨平台：

set(CMAKE_THREAD_PREFER_PTHREAD ON)
find_package (Threads)
target_link_libraries (server ${CMAKE_THREAD_LIBS_INIT})

如何修复此cmake文件？ c文件忽略了它依赖的h文件

1 个答案: