安装CMake库：是否还为依赖项提供了查找模块？ [英] Installing a CMake library: also ship find modules for the dependencies?

问题描述

我的CMake库 MyLibrary 具有 OtherLibrary 的依赖关系，我使用非-standard FindOtherLibrary.cmake 。

My CMake library, MyLibrary, has a dependency for OtherLibrary, that I import with a non-standard FindOtherLibrary.cmake.

我的库依赖于 OtherLibrary 公开：

target_link_libraries(MyLibrary PUBLIC OtherLibrary::OtherLibrary)

当我安装 MyLibrary 时（连同 MyLibraryConfig.cmake ），并且用户希望链接到该链接，因此需要导入 OtherLibrary 。

When I install MyLibrary (together with MyLibraryConfig.cmake), and users want to link against it, they therefore need to import OtherLibrary.

关于如何在 MyLibrary中分发 FindOtherLibrary.cmake 有很好的做法 code>？

Is there a good practice regarding how to distribute FindOtherLibrary.cmake along MyLibrary?

理想情况下，对于 MyLibrary的用户来说，这可能会让事情变得更加轻松，方法是从安装的配置文件 MyLibraryConfig.cmake 中自动导入 OtherLibrary 像

Ideally, one could make things even easier for users of MyLibrary by importing OtherLibrary automatically from the installed config file MyLibraryConfig.cmake, if it contains something like

include(CMakeFindDependencyMacro)
find_dependency(OtherLibrary)

并知道 FindOtherLibrary.cmake 在哪里。

这有可能吗？

推荐答案

我最终找到了解决问题的方法。

I ended up finding a solution to my question.

原则上，它会执行@utopia的建议，但会以自动化的方式进行：我图书馆的最终用户不需要设置（甚至不知道） FindOtherLibrary。 cmake 。它将由 MyLibraryConfig.cmake 自动导入。

In principle, it does what @utopia suggested, but in an automated fashion: the end user of my library does not need to set up (or even know about) FindOtherLibrary.cmake. It will be imported automatically by MyLibraryConfig.cmake.

为此，我安装了 FindOtherLibrary.cmake 和 MyLibraryConfig.cmake ：

install(FILES
          /path/to/MyLibraryConfig.cmake
        DESTINATION
          lib/cmake/MyLibrary
        )
install(FILES
          /path/to/FindOtherLibrary.cmake
        DESTINATION
          lib/cmake/MyLibrary/Modules
        )

然后在 MyLibraryConfig.cmake 中设置如何导入它：

And in MyLibraryConfig.cmake I set up how to import it:

include(CMakeFindDependencyMacro)
set(CMAKE_MODULE_PATH ${CMAKE_MODULE_PATH} "${CMAKE_CURRENT_LIST_DIR}/Modules/")
find_dependency(OtherLibrary REQUIRED)

请注意，我设置了变量 CMAKE_MODULE_PATH ，因为无法指定查找模块的位置在 find_package 或 find_de中待命（仅适用于配置模式）。

Note that I set the variable CMAKE_MODULE_PATH because it is not possible to specify the location of find modules in find_package or find_dependency (works only for config mode).

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