Question

我正在使用cmake，通过ExternalProject_add添加一些项目，当我添加目标

ExternalProject_Add_StepTargets(SubProject doc)
ExternalProject_Add_Step(SubProject doc)

我获得了一个新目标SubProject-doc，但是当我构建它时，doc的目标SubProject未被执行。

外部项目添加如下：

ExternalProject_add(subproject
    SOURCE_DIR ${CMAKE_CURRENT_SOURCE_DIR}/subproject
    BINARY_DIR ${subproject_DIR}
    CMAKE_ARGS ${CMAKE_ARGS}
    INSTALL_DIR ${CMAKE_BINARY_DIR}/install
    DEPENDS subproject2
)

Answer 1

ExternalProject的步骤与其所代表的子项目的目标之间没有隐式关系。 CMake只知道如何生成一些预定义的步骤，如“下载”，“配置”，“构建”。要创建其他步骤，您需要明确地为它们指定命令：

ExternalProject_Add_Step(Subproject doc
    # Equivalent to 'make doc' but in platform-independent manner
    COMMAND ${CMAKE_COMMAND} --build . --target doc
    # Use automatically-replaced token for refer to binary dir
    WORKING_DIRECTORY <BINARY_DIR>
    # When requested, step is always run.
    # (It is 'make doc' behavior who should care to not generate 
    # documentation if it has already been generated.)
    ALWAYS 1
    # This step is not a part of normal build of external project.
    EXCLUDE_FROM_MAIN 1
    # However, this step requires some other steps to be performed
    DEPENDEES configure
    )

之后，您可以在主项目中创建一个目标，该目标将执行给定的步骤：

ExternalProject_Add_StepTargets(SubProject doc)

在ExternalProject模块的What's the difference between `on` and `live` or `bind`?中查看更多内容。

cmake不运行外部项目的StepTargets

1 个答案: