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CMake使用速抄指北

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设置生成目标的输出目录

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set(CMAKE_RUNTIME_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/$<CONFIG>)
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY ${CMAKE_BINARY_DIR}/$<CONFIG>)

Note $<CONFIG>应该在VS下才起作用

生成配置文件

比如生成版本信息，可以参考assimp

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PROJECT(Assimp VERSION 5.4.3)

SET (ASSIMP_VERSION_MAJOR ${PROJECT_VERSION_MAJOR})
SET (ASSIMP_VERSION_MINOR ${PROJECT_VERSION_MINOR})
SET (ASSIMP_VERSION_PATCH ${PROJECT_VERSION_PATCH})

CONFIGURE_FILE(
  ${CMAKE_CURRENT_LIST_DIR}/include/assimp/revision.h.in
  ${CMAKE_CURRENT_BINARY_DIR}/include/assimp/revision.h
)

revision.h.in中的一部分如下：

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#define VER_MAJOR @ASSIMP_VERSION_MAJOR@
#define VER_MINOR @ASSIMP_VERSION_MINOR@
#define VER_PATCH @ASSIMP_VERSION_PATCH@

PROJECT(Assimp VERSION 5.4.3)会生成PROJECT_VERSION_MAJOR、PROJECT_VERSION_MINOR、PROJECT_VERSION_PATCH变量。

后处理事件

  1. 拷贝目标所需文件到对应Configuration目录
    参考自How to copy DLL files into the same folder as the executable using CMake?

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    # copy file
    add_custom_command(TARGET MyTest POST_BUILD        # Adds a post-build event to MyTest
        COMMAND ${CMAKE_COMMAND} -E copy_if_different  # which executes "cmake - E copy_if_different..."
            "${PROJECT_SOURCE_DIR}/libs/test.dll"      # <--this is in-file
            $<TARGET_FILE_DIR:MyTest>)                 # <--this is out-file path

    # copy dir
    add_custom_command(TARGET MyTest POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy_directory
            "${PROJECT_SOURCE_DIR}/libs"
            $<TARGET_FILE_DIR:MyTest>)

    # copy dir of specified configuration
    add_custom_command(TARGET MyTest POST_BUILD
        COMMAND ${CMAKE_COMMAND} -E copy_directory
            "${PROJECT_SOURCE_DIR}/libs/$<CONFIGURATION>"
            $<TARGET_FILE_DIR:MyTest>)

  2. 拷贝所有目标所需文件到对应Configuration目录
    参考自Copy all files with given extension to output directory using CMake

方法一

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file(GLOB MY_PUBLIC_FILES "myDir/*.*" )
file(COPY ${MY_PUBLIC_FILES} DESTINATION ${CMAKE_BINARY_DIR}/${CMAKE_BUILD_TYPE})

方法二

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install(DIRECTORY ${PROJECT_SOURCE_DIR}/myDir/ # 注意末尾的`/`
        DESTINATION ${CMAKE_BINARY_DIR}/${CMAKE_BUILD_TYPE}
        FILES_MATCHING PATTERN "*.*" )

cmake --install . # --config RelWithDebInfo