cmake：添加依赖不在子目录中 [英] cmake: add dependency not in subdirectory

问题描述

我们假设有以下目录结构：

Let's say there's following directory structure:

root
  |
  +--projects
  |      |
  |      +-test
  |         |
  |         +-CMakeFiles.txt
  |
  +--libs
       |
       +-testlib
            |
            +-CMakeFiles.txt

test包含CMakeFiles.txt，testlib也包含CMakeFiles.txt 。 test生成可执行文件，testlib生成静态库。

test contains CMakeFiles.txt and testlib also contains CMakeFiles.txt. "test" produces executable and "testlib" produces static library.

我想要test链接到testlib而不使用符号链接，子目录test。

I want "test" to link with "testlib" without using symlinks and without moving "testlib" library into subdirectory within "test".

因为testlib不是test的子目录，所以我不能这样做

Because "testlib" isn't a subdirectory of "test", I can't do

add_subdirectory("../../libs/testlib")

在测试的CMakeFiles.txt - cmake将抱怨testlib不在测试子目录。

In test's CMakeFiles.txt - cmake will complain about "testlib" not being in "test" subdirectory.

此外，因为系统有几个不同的编译器，我不能只需将testlib库安装到某种中央目录中，因此我想测试编译testlib的本地副本并链接它（即如同testlib是一个子目录）。我还希望测试项目自动重建testlib，如果它已经改变。

Also, because system has several different compilers, I can't simply install "testlib" libraries into some kind of central directory, so I want test to compile local copy of testlib and link with it (i.e. as if testlib was a subdirectory). I also want "test" project to automatically rebuild "testlib" if it has been changed.

那么，我该如何处理呢？ cmake 2.8.4，winxp sp3。

So, how can I deal with it? cmake 2.8.4, winxp sp3.

推荐答案

您可以在 root ，或者为 add_subdirectory 命令提供二进制目录;例如

You could either provide a top-level CMakeLists.txt in root, or provide a binary directory to the add_subdirectory command; e.g.

add_subdirectory("../../libs/testlib" "${CMAKE_CURRENT_BINARY_DIR}/testlib_build")

这将在当前构建目录中创建一个名为 testlib_build 的子目录

This creates a subdirectory called testlib_build in your current build directory which contains the generated project files for testlib, but not the source.

有关更多信息，请运行

cmake --help-command ADD_SUBDIRECTORY

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