CMake：设置目标源的目录 [英] CMake: set directory for target sources

问题描述

我有一个C ++项目，其中所有实现源文件（* .cpp）都位于项目目录内的 src 目录中。其中一些文件位于其他子目录中。假设 src / foo / 中有50个文件。我需要将这些文件作为 add_library 和/或 target_sources 函数的一部分列出。

I have a C++ project where all implementation source files (*.cpp) reside in a src directory within the project directory. Some of the files are in further subdirectories. Let's say there are 50 files in src/foo/. I need to list these files as part of the add_library and/or the target_sources function.

现在，不建议在任何地方使用，自动添加目录中的所有文件，这对我来说很好。因此，我将手动列出所有文件；但是将通用前缀 src / foo / 重复50次似乎很愚蠢而且令人讨厌。

Now, everywhere one looks, adding all files from a directory automtically is discouraged, which is fine with me. So I am going to list all the files manually; but repeating the common prefix src/foo/ 50 times seems really silly and is annoying.

在说明target_sources的文档

相对源文件路径被解释为相对于当前源目录（即CMAKE_CURRENT_SOURCE_DIR）。

Relative source file paths are interpreted as being relative to the current source directory (i.e. CMAKE_CURRENT_SOURCE_DIR).

所以我添加了 set（CMAKE_CURRENT_SOURCE_DIR quot ; src / foo /）调用 target_source 之前，但是没有用。 （我收到找不到源文件错误。）

So I've added set(CMAKE_CURRENT_SOURCE_DIR "src/foo/") before the call to target_source but it didn't work. (I get a "Cannot find source file" error.)

那么，即使有可能，实现我想要的正确方法是什么？

So what is the correct way to achieve what I want if it is even possible?

NB：项目的（公共）头文件（* .hpp）位于 include 目录中（在 src 之外）。可以使用 target_include_directories 函数很好地配置（不必列出单个文件）。

N.B.: The (public) header files (*.hpp) of the project are in an include directory (outside of src). This is nicely configured (without having to list the individual files) with the target_include_directories function.

推荐答案

，但重复通用前缀src / foo / 50次

but repeating the common prefix src/foo/ 50 times

set(target_sources
    source1.c
    source2.c
)
list(TRANSFORM target_sources PREPEND "src/foo/")

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