CMake：如何先执行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
)

我试图先运行它，然后生成unix Makefile。

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

但是PRE_BUILD仅支持VS2010，这意味着 config .h 是在链接之前构建的。

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

在cmake开始编译源代码之前，如何进行自定义命令。

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

推荐答案

您应使用 add_custom_target 代替，然后 add_dependencies 来使您的正常目标依赖于此：

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)

这应确保在编译 myTarget 的源之前运行命令。

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

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