CMake 在不同的构建目录中构建多个目标

问题描述

我有以下 CMake 结构:

I have the following CMake structure:

CMakelists.txt
toolchain.cmake
folder1
   ----CMakelists.txt
folder2
   ----CMakelists.txt
etc..

我的一级 CMakelists.txt 文件包括其他子目录.现在我想为不同的目标构建我的代码.

My first-level CMakelists.txt file includes the other subdirectories. Now I want to build my code for a different target.

手动方式是:

1.
    mkdir hostBuild
    cd hostBuild
    cmake ..
    make

2.
    mkdir crossBuild
    cd crossBuild
    cmake .. --DCMAKE_TOOLCHAIN_FILE=toolchain.cmake
    make

这个进程有可能自动运行吗?

Is it possible that this process can run automatically?

例如，我只需要在我的第一级运行 cmake ..

For example, I just have to run cmake . at my first level.

这样的事情有可能吗?

推荐答案

没有.建议是将您的手动步骤放入 shell 脚本中.

No. The recommendation would be to just put your manual steps into a shell script.

CMake 一次只能处理一个编译器/make 环境(如果你切换编译器你需要一个不同的二进制输出目录).

CMake can only handle one compiler/make environment at a time (if you switch the compiler you need a different binary output directory).

特别是包含 SET(CMAKE_SYSTEM_NAME ...) 的工具链文件确实改变了配置/生成过程的整个结果.

Especially a toolchain file that does contain SET(CMAKE_SYSTEM_NAME ...) does change the whole outcome of the configuration/generation process.

有关 CMake 所见的详细信息:CMake:在解析文件的顺序是什么(缓存、工具链……)?

For details on what CMake does see: CMake: In which Order are Files parsed (Cache, Toolchain, …)?

你可以在你的 shell 脚本中使用一些 CMake 命令行选项:

And you could make use of some CMake command line options in your shell script:

if [ ! -d hostBuild ]; then
    cmake -E make_directory hostBuild
    cmake -E chdir hostBuild cmake ..
fi
cmake --build hostBuild
...

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