使用CMake在子目录中添加依赖项 [英] Add a dependency not in a subdirectory using CMake

问题描述

假设有以下目录结构：

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

test 包含 CMakeFiles.txt 和 testlib 还包含 CMakeFiles.txt 。 测试生成可执行文件，测试库生成静态库。

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

我希望测试与测试库链接，而无需使用符号链接，也无需移动测试库

I want "test" to link with "testlib" without using symlinks and without moving "testlib" library into a 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 中-CMake会抱怨 testlib不在 test子目录中。

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

另外，由于系统具有几种不同的编译器，所以我不能简单地将 testlib库安装到某种中央目录中，因此我想进行 test 编译 testlib 的本地副本并与其链接（即 testlib 是子目录）。如果更改，我也希望测试项目自动重建测试库。

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 a local copy of testlib and link with it (i.e. as if testlib was a subdirectory). I also want the "test" project to automatically rebuild "testlib" if it has been changed.

那么，我该如何处理呢？我在Windows XP SP3上使用CMake 2.8.4。

So, how can I deal with it? I am using CMake 2.8.4 on Windows XP SP3.

推荐答案

您可以在以下位置提供顶级CMakeLists.txt root ，或为 add_subdirectory 命令提供一个二进制目录；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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