使用CMake将`src`目录中的源代码编译为`bin`目录中的二进制文件 [英] Compile sources in `src` directory to binaries in `bin` directory with CMake

问题描述

我的项目目录包含 CMakeLists.txt 文件和 src 和 include 目录。 src 也包含自己的 CMakeLists.txt ，它由根在一个根链接。有没有办法我可以指定CMake设置默认全局编译目录，使 src / CMakeLists.txt 中的语法接近以下？

My project directory contains a CMakeLists.txt file and src and include directories at its root. src also contains its own CMakeLists.txt, which is linked by the one at the root. Is there a way I can specify to CMake to set a default global build directory so that the syntax in src/CMakeLists.txt is close to the following?

include_directories(include)
add_executable(first main.cpp foo.cpp)
add_executable(second bar.cpp)

我想建立这个目录树：

CMakeLists.txt

src/
    CMakeLists.txt
    main.cpp
    foo.cpp
    bar.cpp

include/
    ...

bin/ (or build/)
    first
    second

推荐答案

您可以设置 CMAKE_RUNTIME_OUTPUT_DIRECTORY ：

set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_SOURCE_DIR}/bin)

但是，这不会为每个不同的目标创建 bin / 内的子目录。

However, this won't create subdirectories inside bin/ for each different target.

如果你想要的话，你可以创建一个帮助函数来包装 add_subdirectories ：

If you want that, you could create a helper function to wrap add_subdirectories:

function(my_add_executable TargetName)
  set(Files ${ARGV})
  list(REMOVE_AT Files 0)
  add_executable(${TargetName} ${Files})
  set_target_properties(${TargetName} PROPERTIES
                            RUNTIME_OUTPUT_DIRECTORY
                                "${CMAKE_SOURCE_DIR}/bin/${TargetName}")
endfunction()

然后只需将您的来电更改为：

then simply change your calls to:

my_add_executable(first main.cpp foo.cpp)
my_add_executable(second bar.cpp)

有关详情，请运行

For further details, run

cmake --help-variable "CMAKE_RUNTIME_OUTPUT_DIRECTORY"
cmake --help-property "RUNTIME_OUTPUT_DIRECTORY"
cmake --help-property "RUNTIME_OUTPUT_DIRECTORY_<CONFIG>"

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