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如何修复 CMake Protobuf FindThreads only works if either C or CXX language is enabled

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问题：

尝试使用以下命令配置 CMake 项目时

CMakeLists_find_protobuf.txt
find_package(Protobuf REQUIRED)

你看到类似这样的错误消息

cmake_findthreads_error.txt
CMake Error at /usr/share/cmake-3.16/Modules/FindThreads.cmake:49 (message):
  FindThreads only works if either C or CXX language is enabled
Call Stack (most recent call first):
  /usr/share/cmake-3.16/Modules/FindProtobuf.cmake:420 (find_package)
  CMakeLists.txt:7 (find_package)

-- Configuring incomplete, errors occurred!

解决方案

你需要将你的

CMakeLists_project.txt
project(MyProject)

行放在

CMakeLists_find_protobuf_after_project.txt
find_package(Protobuf REQUIRED)

行之前。如果你没有 project() 行，创建一个。

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