Cmake无法找到包含神秘错误消息的线程包

我正在尝试使用以下CMakeLists.txt进行配置：

cmake_minimum_required(VERSION 3.2)                                                                                                    
project(MotionBlow CXX)
find_package(Threads REQUIRED)                                                                                                     
find_package(Boost COMPONENTS system program_options REQUIRED)                                                                     
include(gtest.cmake)

add_executable(motionBlow src/blow.cpp)
target_include_directories(motionBlow PUBLIC include)
target_link_libraries(motionBlow RTIMULib ${Boost_LIBRARIES})
set_property(TARGET motionBlow PROPERTY CXX_STANDARD 14)

add_executable(chat_client src/chat_client.cpp)
target_include_directories(chat_client PUBLIC include)
target_link_libraries(chat_client ${Boost_LIBRARIES} Threads::Threads)
set_property(TARGET chat_client PROPERTY CXX_STANDARD 14)

add_executable(chat_server src/chat_server.cpp)
target_include_directories(chat_server PUBLIC include)
target_link_libraries(chat_server ${Boost_LIBRARIES} Threads::Threads)
set_property(TARGET chat_server PROPERTY CXX_STANDARD 14)

enable_testing()

add_executable(matrixTest test/MatrixTest.cpp src/Matrix.cpp)
target_include_directories(matrixTest PUBLIC include ${GTEST_INCLUDE_DIR})
target_link_libraries(matrixTest ${GTEST_LIBRARY} Threads::Threads)
set_property(TARGET matrixTest PROPERTY CXX_STANDARD 14)

在ubunutu 16.04上它可以正常工作，但在Raspbian 8.0/Cmake 3.6.2的raspberry pi和ubuntu 15.10/Cmake 3.2.2上我都可以看到

CMake Error at /usr/share/cmake-3.2/Modules/FindPackageHandleStandardArgs.cmake:138 (message):
  Could NOT find Threads (missing: Threads_FOUND)
Call Stack (most recent call first):
  /usr/share/cmake-3.2/Modules/FindPackageHandleStandardArgs.cmake:374 (_FPHSA_FAILURE_MESSAGE)
  /usr/share/cmake-3.2/Modules/FindThreads.cmake:204 (FIND_PACKAGE_HANDLE_STANDARD_ARGS)
  CMakeLists.txt:4 (find_package)

不幸的是，错误日志仅包含以下内容：

Determining if files pthread.h exist failed with the following output:

Source:
/* */
#include <pthread.h>


int main(void){return 0;}

确定文件pthread.h是否存在失败，输出如下：
资料来源：
/* */
#包括
int main（void）{返回0；}

---

所以我不知道怎么把它修好。有什么想法吗？我的CMakelists.txt是否丢失了某些内容，或者我是否应该获得丢失的软件包？

使用您的代码，我可能会重现您的错误，这似乎是由此产生的后续错误：

-- Looking for include file pthread.h
CMake Error at /usr/share/cmake-3.2/Modules/CheckIncludeFiles.cmake:74 (try_compile):
  Unknown extension ".c" for file
  try_compile() works only for enabled languages.  Currently these are:

    CXX

  See project() command to enable other languages.

两种可能的解决办法：

将

C

添加到项目语言中：

project(MotionBlow C CXX)

<> >添加<代码> .c>代码>扩展：一个有效的C++文件：

MotionBlowMakeRulesOverwrite.cmake

list(APPEND CMAKE_CXX_SOURCE_FILE_EXTENSIONS c)

CMakeLists.txt

cmake_minimum_required(VERSION 3.2)
set(CMAKE_USER_MAKE_RULES_OVERRIDE "MotionBlowMakeRulesOverwrite.cmake")
project(MotionBlow CXX)

如果这些都不起作用，请检查是否安装了

pthread

：

sudo apt get安装libpthread-stubs0-dev

参考资料

---

添加C是有效的，但只有在rm-rf'ing了该死的cmake生成的文件之后（我之前尝试过添加C几次）。在此之前，即使是有政策的人也没有这样做。无论如何，谢谢！