如何包含额外的CMakeLists.txt [英] How to include an additional CMakeLists.txt

问题描述

假设我们在CMakeLists.txt中有一个命令 foo ，位于文件夹 / A 中。

foo 在 / B



如何从内引用 /B/CMakeLists.txt /A/CMakeLists.txt 以便调用 foo ？

通过以下方式将搜索路径设置为 /B/CMakeLists.txt ：

• CMAKE_INCLUDE_PATH


• CMAKE_MODULE_PATH


• $ c> CMAKE_SOURCE_DIR

但均无效。

CMake仍然抱怨未知的CMake命令foo。

解决方案

这可以通过 include 来实现，这里有一些简单的例子：

A / CMakeLists.txt的内容

  function（foo）
 message（STATUSheya）
 endfunction（）
  

B / CMakeLists.txt的内容

  cmake_minimum_required（VERSION 2.8）
 include（$ {CMAKE_CURRENT_SOURCE_DIR} /../ A / CMakeLists.txt）
 foo（）
  

现在，包括另一个CMakeLists.txt也将运行该文件中的一切，所以你可以避免这样做，如果有目标在B / CMakeLists.txt

如果您可以修改代码，最好在调用 add_subdirectory 之前在顶级CMakeLists.txt中定义函数$ c>。

Say we have a command call foo in CMakeLists.txt which is in folder /A.

foo is defined in antother CMakeLists.txt which is in folder /B.

How can one reference to /B/CMakeLists.txt from within /A/CMakeLists.txt in order to call foo?

I tried to set search paths to /B/CMakeLists.txt via:

• CMAKE_INCLUDE_PATH
• CMAKE_MODULE_PATH
• CMAKE_SOURCE_DIR

but none of them worked.

CMake still complaines Unknown CMake command "foo".

解决方案

That can be done with include, here's some simple example:

Content of A/CMakeLists.txt

function(foo)
    message(STATUS "heya")
endfunction()

Content of B/CMakeLists.txt

cmake_minimum_required(VERSION 2.8)
include(${CMAKE_CURRENT_SOURCE_DIR}/../A/CMakeLists.txt)
foo()

Now, including another CMakeLists.txt will also run everything in that file, so you may to avoid doing that if there's targets in B/CMakeLists.txt

If you can modify your code, it would be better to define your functions in a "top level" CMakeLists.txt before calling add_subdirectory.

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