在每个构建时执行 CMake 函数

Question

我有两个 cmake 函数来检查资源/着色器文件是否找不到/修改匹配以构建。

检查.cmake

function(Check sourcefile destinationfile)
    if(NOT EXISTS ${destinationfile})
        execute_process(COMMAND ${CMAKE_COMMAND}
                -E copy ${sourcefile} ${destinationfile})
    elseif(${sourcefile} IS_NEWER_THAN ${destinationfile})
        execute_process(COMMAND ${MSGMERGE_EXECUTABLE}
                "--update" ${destinationfile} ${sourcefile}
                OUTPUT_QUIET ERROR_VARIABLE error RESULT_VARIABLE ret)

        if(ret) # Have to do this hack as msgmerge prints to stderr.
            message(SEND_ERROR "${error}")
        endif()
    endif()
endfunction()

AddResources.cmake

include(./Check.cmake)

function(AddResources project)
    file(GLOB_RECURSE resources ${PROJECT_SOURCE_DIR}/src/project1/Resources/*)
    file(GLOB_RECURSE shaders ${PROJECT_SOURCE_DIR}/src/project1/Shaders/*)
    foreach( each_file1 ${resources} )
        get_filename_component(targetFile ${each_file1} NAME)
        if(WIN32)
          set(destinationfile "${CMAKE_CURRENT_SOURCE_DIR}/bin/Release/${targetFile}")
          set(destinationfile2 "${CMAKE_CURRENT_SOURCE_DIR}/bin/Debug/${targetFile}")
          set(sourcefile ${each_file1})
          Check(${sourcefile} ${destinationfile})
          Check(${sourcefile} ${destinationfile2})
        else ()
          set(destinationfile "${CMAKE_CURRENT_SOURCE_DIR}/bin/${targetFile}")
          set(sourcefile ${each_file1})
          Check(${sourcefile} ${destinationfile})
        endif()
    endforeach(each_file1)
    foreach( each_file2 ${shaders} )
        get_filename_component(targetFile ${each_file2} NAME)
        if(WIN32)
          set(destinationfile "${CMAKE_CURRENT_SOURCE_DIR}/bin/Release/${targetFile}")
          set(destinationfile2 "${CMAKE_CURRENT_SOURCE_DIR}/bin/Debug/${targetFile}")
          set(sourcefile ${each_file2})
          Check(${sourcefile} ${destinationfile})
          Check(${sourcefile} ${destinationfile2})
        else()
          set(destinationfile "${CMAKE_CURRENT_SOURCE_DIR}/bin/${targetFile}")
          set(sourcefile ${each_file2})
          Check(${sourcefile} ${destinationfile})
        endif()

    endforeach(each_file2)
endfunction()

在 CMakeLists.txt 中执行 AddResources(project1)。

AddResources 会将所有资源和着色器复制到 bin 文件夹，但它只复制一次（CMake 配置过程），而不是每次构建时。

有没有办法在每次构建时使用参数执行 CMake 函数？

Answer 1

我想你在找add_custom_command

add_custom_command(TARGET target
               PRE_BUILD | PRE_LINK | POST_BUILD
               COMMAND command1 [ARGS] [args1...]
               [COMMAND command2 [ARGS] [args2...] ...]
               [WORKING_DIRECTORY dir]
               [COMMENT comment] [VERBATIM])

这定义了一个与构建指定目标相关联的新命令。该命令何时发生取决于指定以下哪一项：
PRE_BUILD - 在所有其他依赖项之前运行
PRE_LINK - 在其他依赖项之后运行
POST_BUILD - 在构建目标后运行