CMake:如何将 INTERFACE_INCLUDE_DIRECTORIES 与 ExternalProject 一起使用? [英] CMake: how to use INTERFACE_INCLUDE_DIRECTORIES with ExternalProject?

问题描述

我正在尝试使用 ExternalProject_Add 将外部项目作为库添加到我的项目中:

I'm trying to add external project as a library to my project using ExternalProject_Add:

ExternalProject_Add(
        xgboost
        GIT_REPOSITORY https://github.com/dmlc/xgboost.git
        GIT_TAG v0.60
        PREFIX ${CMAKE_CURRENT_BINARY_DIR}
        INSTALL_COMMAND ""
)

此外，我正在定义库目标并将外部项目添加为依赖项:

Also, I'm defining library target and adding external project as a dependency:

set(XGBOOST_PREFIX_PATH "${CMAKE_CURRENT_BINARY_DIR}/src")
set(XGBOOST_BINARY_PATH "${XGBOOST_PREFIX_PATH}/xgboost-build")
set(XGBOOST_BINARY_INCLUDE "${XGBOOST_PREFIX_PATH}/xgboost/include;${XGBOOST_PREFIX_PATH}/xgboost/dmlc-core/include;${XGBOOST_PREFIX_PATH}/xgboost/rabit/include")
add_library(libxgboost IMPORTED STATIC GLOBAL)
add_dependencies(libxgboost xgboost)

set_target_properties(libxgboost PROPERTIES
        "IMPORTED_LOCATION" "${XGBOOST_BINARY_PATH}/liblibxgboost.dylib"
        "IMPORTED_LINK_INTERFACE_LIBRARIES" "${CMAKE_THREAD_LIBS_INIT}"
        "INTERFACE_INCLUDE_DIRECTORIES" "${XGBOOST_BINARY_INCLUDE}"
        )

在另一个 CMakeLists.txt 中:

in another CMakeLists.txt:

add_library(somelib STATIC SomeLib.cpp)
target_include_directories(somelib PUBLIC libxgboost)
target_link_libraries(somelib libxgboost)

问题是 cmake INTERFACE_INCLUDE_DIRECTORIES 不允许导出不存在的包含目录.

The problem is that cmake INTERFACE_INCLUDE_DIRECTORIES doesn't allow to export include dir which does not exist.

有没有其他方法可以让所有依赖于 libxgboost 的目标自动包含头文件?

Is there any other way to make header files being included automatically for all targets which depend on libxgboost ?

更新:

错误信息:

CMake Error in somelib/CMakeLists.txt:
  Imported target "libxgboost" includes non-existent path

    "build/xgboost/src/xgboost/include"

  in its INTERFACE_INCLUDE_DIRECTORIES.  Possible reasons include:

  * The path was deleted, renamed, or moved to another location.

  * An install or uninstall procedure did not complete successfully.

  * The installation package was faulty and references files it does not
  provide.

推荐答案

我将发布最终的 CMakeLists.txt 以将 xgboost 包含到您的项目中，它可能对某人有用，解决方案上面的问题是在 cmake 配置阶段创建目录(注意:我使用 OSX 来构建它，所以你需要使用 liblibxgboost.so for GNU/Linux而不是 liblibxgboost.dylib):

I'll post the final CMakeLists.txt to include xgboost into your project, it might be useful for someone, the solution to the problem above is to create directories during cmake configure phase (NOTE: I'm using OSX to build that, so you would need to use liblibxgboost.so for GNU/Linux instead of liblibxgboost.dylib):

include(ExternalProject)

ExternalProject_Add(
        xgboost
        GIT_REPOSITORY https://github.com/dmlc/xgboost.git
        GIT_TAG v0.60
        PREFIX ${CMAKE_CURRENT_BINARY_DIR}
        INSTALL_COMMAND ""
)

set(XGBOOST_PREFIX_PATH "${CMAKE_CURRENT_BINARY_DIR}/src")
set(XGBOOST_BINARY_PATH "${XGBOOST_PREFIX_PATH}/xgboost-build")

set(XGBOOST_LIB_INCLUDE "${XGBOOST_PREFIX_PATH}/xgboost/include")
set(DMLC_LIB_INCLUDE "${XGBOOST_PREFIX_PATH}/xgboost/dmlc-core/include")
set(RABIT_LIB_INCLUDE "${XGBOOST_PREFIX_PATH}/xgboost/rabit/include")
set(XGBOOST_BINARY_INCLUDE "${XGBOOST_LIB_INCLUDE};${DMLC_LIB_INCLUDE};${RABIT_LIB_INCLUDE}")

# Hack to make it work, otherwise INTERFACE_INCLUDE_DIRECTORIES will not be propagated
file(MAKE_DIRECTORY ${XGBOOST_LIB_INCLUDE})
file(MAKE_DIRECTORY ${DMLC_LIB_INCLUDE})
file(MAKE_DIRECTORY ${RABIT_LIB_INCLUDE})

add_library(libxgboost IMPORTED STATIC GLOBAL)
add_dependencies(libxgboost xgboost)

set_target_properties(libxgboost PROPERTIES
        "IMPORTED_LOCATION" "${XGBOOST_BINARY_PATH}/liblibxgboost.dylib"
        "INTERFACE_INCLUDE_DIRECTORIES" "${XGBOOST_BINARY_INCLUDE}"
)

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