c++ - 将导入的库链接到 CMake ExternalProject

Question

我正在尝试创建一个 super 构建来编译依赖项(zlib、nifticlib 和 boost)，然后根据所有这些库编译我的项目。

这是我的 CMakeLists:

cmake_minimum_required(VERSION 3.6)

project(CMakeTest)

#-----------------------------------------------------------------------------
# Build options
#-----------------------------------------------------------------------------

option(BUILD_MYPROJECT "Build MYPROJECT." ON)

#-----------------------------------------------------------------------------
# Git protocole option
#-----------------------------------------------------------------------------
option(USE_GIT_PROTOCOL "If behind a firewall turn this off to use http instead." OFF)

set(git_protocol "git")
if(NOT USE_GIT_PROTOCOL)
  set(git_protocol "https")
endif()

#-----------------------------------------------------------------------------
# Enable and setup External project global properties
#-----------------------------------------------------------------------------
include(ExternalProject)

if (NOT CMAKE_BUILD_TYPE)
  set(CMAKE_BUILD_TYPE Release CACHE STRING
    "Choose the type of build, options are: None Debug Release RelWithDebInfo MinSizeRel."
    FORCE)
endif()

#-----------------------------------------------------------------------------
# Zlib
#-----------------------------------------------------------------------------

message(STATUS "Installing Zlib library.")

ExternalProject_Add(Zlib
  SOURCE_DIR "${PROJECT_BINARY_DIR}/deps/zlib"
  BINARY_DIR "${PROJECT_BINARY_DIR}/deps/zlib-build"
  INSTALL_DIR "${PROJECT_BINARY_DIR}/deps/zlib-install"
  GIT_REPOSITORY "${git_protocol}://github.com/madler/zlib.git"
  GIT_TAG "50893291621658f355bc5b4d450a8d06a563053d"
  CMAKE_ARGS
  -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
  -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
  -DCMAKE_BIN_DIR:PATH=<INSTALL_DIR>/bin
  -DINSTALL_INC_DIR:PATH=<INSTALL_DIR>/include
  -DINSTALL_LIB_DIR:PATH=<INSTALL_DIR>/lib
  -DINSTALL_MAN_DIR:PATH=<INSTALL_DIR>/share/man
  -DINSTALL_PKGCONFIG_DIR:PATH=<INSTALL_DIR>/share/pkgconfig)

if(WIN32)
  set(ZLIB_LIB_BASE_NAME "zlibstatic")
  set(ZLIB_LIB_NAME_RELEASE "${CMAKE_STATIC_LIBRARY_PREFIX}${ZLIB_LIB_BASE_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")
  set(ZLIB_LIB_NAME_DEBUG "${CMAKE_STATIC_LIBRARY_PREFIX}${ZLIB_LIB_BASE_NAME}d${CMAKE_STATIC_LIBRARY_SUFFIX}")
elseif(UNIX)
  set(ZLIB_LIB_BASE_NAME "z")
  set(ZLIB_LIB_NAME_RELEASE "${CMAKE_STATIC_LIBRARY_PREFIX}${ZLIB_LIB_BASE_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")
  set(ZLIB_LIB_NAME_DEBUG "${CMAKE_STATIC_LIBRARY_PREFIX}${ZLIB_LIB_BASE_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")
else()
  # MacOSX
endif()

ExternalProject_Get_Property(Zlib install_dir)
set(ZLIB_LIBRARY_DIR ${install_dir}/lib)
set(ZLIB_INCLUDE_DIR ${install_dir}/include)
set(ZLIB_BINARY_DIR ${install_dir}/bin)

add_library(zlib STATIC IMPORTED)
set_target_properties(zlib PROPERTIES IMPORTED_LOCATION_DEBUG "${ZLIB_LIBRARY_DIR}/${ZLIB_LIB_NAME_DEBUG}")
set_target_properties(zlib PROPERTIES IMPORTED_LOCATION_RELEASE "${ZLIB_LIBRARY_DIR}/${ZLIB_LIB_NAME_RELEASE}")

#-----------------------------------------------------------------------------
# Niftilib
#-----------------------------------------------------------------------------

message(STATUS "Installing Nifti library.")

ExternalProject_Add(Nifticlib
  SOURCE_DIR "${PROJECT_BINARY_DIR}/deps/nifticlib"
  BINARY_DIR "${PROJECT_BINARY_DIR}/deps/nifticlib-build"
  INSTALL_DIR "${PROJECT_BINARY_DIR}/deps/nifticlib-install"
  GIT_REPOSITORY "${git_protocol}://gitlab.com/slckr/nifticlib.git"
  GIT_TAG "e26a94e947c210104223f9f49737392c742c1c5b"
  CMAKE_ARGS
  -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
  -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
  -DZLIB_INCLUDE_DIR:PATH=${ZLIB_INCLUDE_DIR}
  -DZLIB_LIBRARY_DEBUG:PATH=${ZLIB_LIBRARY_DIR}/${ZLIB_LIB_NAME_DEBUG}
  -DZLIB_LIBRARY_RELEASE:PATH=${ZLIB_LIBRARY_DIR}/${ZLIB_LIB_NAME_RELEASE}
  DEPENDS Zlib)

set(NIFTIIO_LIB_BASE_NAME "niftiio")
set(NIFTIIO_LIB_NAME "${CMAKE_STATIC_LIBRARY_PREFIX}${NIFTIIO_LIB_BASE_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")

set(NIFTICDF_LIB_BASE_NAME "nifticdf")
set(NIFTICDF_LIB_NAME "${CMAKE_STATIC_LIBRARY_PREFIX}${NIFTICDF_LIB_BASE_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")

set(ZNZ_LIB_BASE_NAME "znz")
set(ZNZ_LIB_NAME "${CMAKE_STATIC_LIBRARY_PREFIX}${ZNZ_LIB_BASE_NAME}${CMAKE_STATIC_LIBRARY_SUFFIX}")

ExternalProject_Get_Property(Nifticlib install_dir)
set(NIFTI_LIBRARY_DIR ${install_dir}/lib)
set(NIFTI_INCLUDE_DIR ${install_dir}/include/nifti)
set(NIFTI_BINARY_DIR ${install_dir}/bin)

add_library(niftiio STATIC IMPORTED)
set_target_properties(niftiio PROPERTIES IMPORTED_LOCATION "${NIFTI_LIBRARY_DIR}/${NIFTIIO_LIB_NAME}")

add_library(nifticdf STATIC IMPORTED)
set_target_properties(nifticdf PROPERTIES IMPORTED_LOCATION "${NIFTI_LIBRARY_DIR}/${NIFTICDF_LIB_NAME}")

add_library(znz STATIC IMPORTED)
set_target_properties(znz PROPERTIES IMPORTED_LOCATION "${NIFTI_LIBRARY_DIR}/${ZNZ_LIB_NAME}")

#-----------------------------------------------------------------------------
# Boost
#-----------------------------------------------------------------------------

message(STATUS "Installing Boost library.")

set(BOOST_BOOTSTRAP_COMMAND)
if(WIN32)
  set(BOOST_BOOTSTRAP_COMMAND bootstrap.bat)
  set(BOOST_B2_COMMAND b2.exe)
elseif(UNIX )
  set(BOOST_BOOTSTRAP_COMMAND ./bootstrap.sh)
  set(BOOST_B2_COMMAND ./b2)
else()
  # MacOSX
  set(BOOST_BOOTSTRAP_COMMAND ./bootstrap.sh)
  set(BOOST_B2_COMMAND ./b2)
endif()

set(BOOST_BUILD_TYPE variant=release)
if (${CMAKE_BUILD_TYPE} MATCHES Debug)
  set(BOOST_BUILD_TYPE variant=debug)
endif(${CMAKE_BUILD_TYPE} MATCHES Debug)

set(BOOST_INSTALL_DIR ${PROJECT_BINARY_DIR}/deps/boost-install)
ExternalProject_Add(boost
  SOURCE_DIR "${PROJECT_BINARY_DIR}/deps/boost"
  BUILD_IN_SOURCE 1
  GIT_REPOSITORY "${git_protocol}://github.com/boostorg/boost"
  GIT_TAG "5ec478a570bdc71c5d4854e7165a8b3f4fa82ad9"
  CONFIGURE_COMMAND ${BOOST_BOOTSTRAP_COMMAND}
  BUILD_COMMAND ${BOOST_B2_COMMAND} headers COMMAND ${BOOST_B2_COMMAND} install
    link=static
    ${BOOST_BUILD_TYPE}
    --prefix=${BOOST_INSTALL_DIR}
    --with-filesystem
    --with-program_options
    --with-system
    --with-thread
    -j8
  INSTALL_COMMAND ""
)

if(WIN32)
  set(BOOST_LIBRARY_DIR ${BOOST_INSTALL_DIR}/lib/boost)
  set(BOOST_INCLUDE_DIR ${BOOST_INSTALL_DIR}/include/boost-1_65)
else()
  set(BOOST_LIBRARY_DIR ${BOOST_INSTALL_DIR}/lib/boost)
  set(BOOST_INCLUDE_DIR ${BOOST_INSTALL_DIR}/include)
endif()

set(BOOST_SUBMODULES system;filesystem;program_options;thread)

#-----------------------------------------------------------------------------
# MyProject
#-----------------------------------------------------------------------------

message(STATUS "Installing MyProject library.")

if(BUILD_MYPROJECT)
  set(MYPROJECT_LIBS zlib;znz;nifticdf;niftiio)
  ExternalProject_Add(MYPROJECT
    SOURCE_DIR "${PROJECT_BINARY_DIR}/MyProject"
    BINARY_DIR "${PROJECT_BINARY_DIR}/MyProject-build"
    INSTALL_DIR "${PROJECT_BINARY_DIR}/MyProject-install"
    GIT_REPOSITORY "${git_protocol}://gitlab.com/slckr/MyProject.git"
    GIT_TAG "origin/multithread2"
    CMAKE_ARGS
    -DCMAKE_INSTALL_PREFIX:PATH=<INSTALL_DIR>
    -DCMAKE_BUILD_TYPE:STRING=${CMAKE_BUILD_TYPE}
    -DZLIB_INC_DIR:PATH=${ZLIB_INCLUDE_DIR}
    -DZLIB_LIB_DIR:PATH=${ZLIB_LIBRARY_DIR}
    -DNIFTI_INC_DIR:PATH=${NIFTI_INCLUDE_DIR}
    -DNIFTI_LIB_DIR:PATH=${NIFTI_LIBRARY_DIR}
    -DBOOST_INC_DIR:PATH=${BOOST_INCLUDE_DIR}
    -DBOOST_LIB_DIR:PATH=${BOOST_LIBRARY_DIR}
    -DBOOST_SUBMODULES:STRING=${BOOST_SUBMODULES}
    -DMYPROJECT_LIBS:STRING=${MYPROJECT_LIBS}
    DEPENDS Nifticlib boost)
endif()

问题是当我尝试将 MyProject 链接到 nifticlib 或 boost 时，由于库名称因平台而异(我在导入库时处理过)链接失败。

我传递库目录，在 MyProject CMakeLists 中，我这样做:

include_directories(${ZLIB_INC_DIR} ${NIFTI_INC_DIR} ${BOOST_INC_DIR})
link_directories(${ZLIB_LIB_DIR} ${NIFTI_LIB_DIR} ${BOOST_LIB_DIR})

target_link_libraries(MyProject zlib znz niftiio nifticdf)

但是 target_link_libraries 失败了，因为没有找到 zlib(但我在我的 super 构建中导入了它)。我如何告诉 MyProject 使用我的 super 构建的导入库？

谢谢。

Answer 1

我认为这https://crascit.com/2015/07/25/cmake-gtest/可以帮助你。

链接中方法的要点是在配置时构建外部项目。这会将外部项目完全集成到您的构建中，并提供对目标的访问。

不幸的是，该示例使用 gtest 来演示其用法，但可以将其用于其他依赖项。