更改 CMake 文件标准位置 [英] Changing CMake files standard location

问题描述

我有一个源目录，其中包含一个名为phantom-dir/"的文件夹，我将所有不需要的生成文件放在其中.我想将所有由 CMake 生成的文件放在这个幻影目录中(连同其他生成的丑陋"文件).

I have a source directory with a folder called "phantom-dir/" where I put all generated files I don't need. I want to put all generated files by CMake inside this phantom directory (together with other generated and "ugly" files).

一个小例子:

$ mkdir cmake-test
$ cd cmake-test
$ echo 'message("Hello World!")' > CMakeLists.txt
$ cmake . | grep "Hello"
Hello World!
$ tree
.
├── CMakeCache.txt
├── CMakeFiles
│   ├── CMakeCCompiler.cmake
│   ├── cmake.check_cache
│   ├── CMakeCXXCompiler.cmake
│   ├── CMakeDetermineCompilerABI_C.bin
│   ├── CMakeDetermineCompilerABI_CXX.bin
│   ├── CMakeDirectoryInformation.cmake
│   ├── CMakeOutput.log
│   ├── CMakeSystem.cmake
│   ├── CMakeTmp
│   ├── CompilerIdC
│   │   ├── a.out
│   │   └── CMakeCCompilerId.c
│   ├── CompilerIdCXX
│   │   ├── a.out
│   │   └── CMakeCXXCompilerId.cpp
│   ├── Makefile2
│   ├── Makefile.cmake
│   ├── progress.marks
│   └── TargetDirectories.txt
├── cmake_install.cmake
├── CMakeLists.txt
└── Makefile

4 directories, 20 files

默认情况下，所有 CMake 文件(CMakeCache.txt、cmake_install.cmake、Makefile、CMakeFiles)都写入工作目录中.但是，我想要这样的东西:

By default, all CMake files (CMakeCache.txt, cmake_install.cmake, Makefile, CMakeFiles) are written in the working directory. But, I want something like that:

$ mkdir cmake-test
$ cd cmake-test
$ mkdir phantom-dir
$ echo 'message("Hello World!")' > CMakeLists.txt
$ // editing CMakeLists.txt to set some cmake variables.
$ cmake . | grep "Hello"
Hello World!
$ tree
.
├── phantom-dir
│   ├── CMakeCache.txt
│   ├── CMakeFiles
│   │   ├── CMakeCCompiler.cmake
│   │   ├── cmake.check_cache
│   │   ├── CMakeCXXCompiler.cmake
│   │   ├── CMakeDetermineCompilerABI_C.bin
│   │   ├── CMakeDetermineCompilerABI_CXX.bin
│   │   ├── CMakeDirectoryInformation.cmake
│   │   ├── CMakeOutput.log
│   │   ├── CMakeSystem.cmake
│   │   ├── CMakeTmp
│   │   ├── CompilerIdC
│   │   │   ├── a.out
│   │   │   └── CMakeCCompilerId.c
│   │   ├── CompilerIdCXX
│   │   │   ├── a.out
│   │   │   └── CMakeCXXCompilerId.cpp
│   │   ├── Makefile2
│   │   ├── Makefile.cmake
│   │   ├── progress.marks
│   │   └── TargetDirectories.txt
│   ├── cmake_install.cmake
├── CMakeLists.txt
└── Makefile

4 directories, 20 files

即:当前目录下的Makefile(要make，cmake .&&make")，而其余生成的文件在phantom"目录下.

That means: the Makefile in the current directory (to make, "cmake . && make"), but the remaining generated files inside the "phantom" directory.

我知道我可以做到:

$ cd phantom-dir/
$ cmake ../

但是每次我想重新编译或重新制作 cmake 时都这样做对我来说有点烦人，尤其是考虑到我要多次修改我的 CMakeLists.txt.

But it's a little tiresome for me to do it each time I want to re-compiling or remake cmake, above all taking into account that I'm modifying many times my CMakeLists.txt.

我必须在 CMakeLists.txt 文件中设置哪些变量才能实现它?

Which variables I have to set in the CMakeLists.txt file in order to achieve it?

推荐答案

你可以使用未公开的 CMake 选项 -H 和 -B 来避免离开你的源代码目录-H 指定主 CMakeLists.txt 文件的路径，-B 指定所需构建目录的路径.

You could make use of the undocumented CMake options -H and -B to avoid leaving your source dir. -H specifies the path to the main CMakeLists.txt file, and -B specifies the path to your desired build directory.

cmake -H. -Bphantom-dir

请注意，这些没有记录在案，所以我想 Kitware 人可以随时更改.

Note that these are undocumented and so I suppose could change at any time the Kitware guys feel like.

要在不离开源目录的情况下构建项目，您可以使用(官方)选项 --build 这是一种跨平台的方式来调用你选择的构建工具，你可以传递任何你想要的标志工具.例如

To build your project without leaving your source dir, you can make use of the (official) option --build This is a cross-platform way to invoke your chosen build tool, and you can pass whatever flags you want to this tool. e.g.

cmake --build phantom-dir -- -j3

这篇关于更改 CMake 文件标准位置的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持IT屋！