CMake:如何在其他一切之前运行 add_custom_command [英] CMake: How to run a add_custom_command before everything else

问题描述

我有一个自定义命令

add_custom_command(
    OUTPUT config.h
    PRE_BUILD
    COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/mk_config_h.py ${CMAKE_CURRENT_BINARY_DIR}/config.h
)

我正在尝试先运行它，然后生成 unix Makefile.

I'm trying to run it before everything else and I generate unix Makefiles.

然而 PRE_BUILD 仅支持 VS2010，这意味着 config.h 在链接之前构建.

However PRE_BUILD is only supported for VS2010 which means that config.h is build before linking.

如何在 cmake 开始编译源代码之前创建自定义命令.

how do I make a custom command before cmake starts compiling sources.

推荐答案

你应该使用 add_custom_target 而不是 add_dependencies 让你的普通目标依赖它:

You should use add_custom_target instead and add_dependencies to make your normal target depend on it:

add_custom_target(
    myCustomTarget
    COMMAND ${CMAKE_CURRENT_SOURCE_DIR}/mk_config_h.py ${CMAKE_CURRENT_BINARY_DIR}/config.h
)
add_dependencies(myTarget myCustomTarget)

这应该确保在编译 myTarget 的源代码之前运行该命令.

This should ensure that the command is run before compiling the sources of myTarget.

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