Question

我有一个导入的库，我试图使用CMake链接。但是，库始终显示为空（或未找到）。我知道导入的库具有与标准库不同的可见性规则（according to this thread），但无论我尝试什么，库总是最终丢失。首先，这是我的文件夹结构：

Root
├── build
├── cmake
├── src
│   ├── external
│   │   ├── openvdb
│   │   │   ├── openvdb
│   │   │   ├── cmake
│   │   │   ├── CMakeLists.txt
│   │   ├── tbb
│   │   ├── zlib
│   │   ├── CMakeLists.txt
│   ├── CMakeLists.txt
├── CMakeLists.txt

在我的 Root CMakeLists.txt 文件中，我添加了名为TBB_LIBS和TBBMALLOC_LIBS的库，如下所示：

cmake_minimum_required(VERSION 3.2.2 FATAL_ERROR)

include(ExternalProject)
project(openVDBBuild)

set(CMAKE_CXX_STANDARD 11)
set(CMAKE_CXX_STANDARD_REQUIRED ON)

if (WIN32)
    set(CMAKE_CXX_FLAGS "-bigobj /EHsc")
endif ()
set(CMAKE_LIBRARY_OUTPUT_DIRECTORY "${CMAKE_BINARY_DIR}/lib")

if(NOT CMAKE_DEBUG_POSTFIX)
    set(CMAKE_DEBUG_POSTFIX debug)
endif()
if(NOT CMAKE_RELEASE_POSTFIX)
    set(CMAKE_RELEASE_POSTFIX release)
endif()

set(BUILD_VARIANTS "release debug")
set(TBB_PREFIX "tbb")
set(TBB_LIBS_DIR "${CMAKE_SOURCE_DIR}/src/external/tbb/build/${TBB_PREFIX}_")
set(TBB_ROOT  ${CMAKE_SOURCE_DIR}/src/external/tbb)
set(TBB_INCLUDE_DIR ${TBB_ROOT}/include)

#********** Here I create the library and add the Global Flag ***********
add_library(TBBMALLOC_LIBS SHARED IMPORTED GLOBAL)
add_library(TBB_LIBS SHARED IMPORTED GLOBAL)

if (WIN32)

    #********** Here I set different paths for debug and release versions of the library ***********
    set_property(TARGET TBBMALLOC_LIBS PROPERTY IMPORTED_LOCATION_RELEASE ${CMAKE_BINARY_DIR}/lib/tbbmalloc.dll )
    set_property(TARGET TBBMALLOC_LIBS PROPERTY IMPORTED_LOCATION_DEBUG ${CMAKE_BINARY_DIR}/lib/tbbmalloc_${CMAKE_DEBUG_POSTFIX}.dll )

    set_property(TARGET TBB_LIBS PROPERTY IMPORTED_LOCATION_RELEASE ${CMAKE_BINARY_DIR}/lib/tbb.dll )
    set_property(TARGET TBB_LIBS PROPERTY IMPORTED_LOCATION_DEBUG ${CMAKE_BINARY_DIR}/lib/tbb_${CMAKE_DEBUG_POSTFIX}.dll )

    add_custom_command( 
            TARGET ProjectTbbExternal
            POST_BUILD
            COMMAND ${CMAKE_COMMAND} -E copy  "$<$<CONFIG:debug>:${TBB_LIBS_DIR}${CMAKE_DEBUG_POSTFIX}/tbb_${CMAKE_DEBUG_POSTFIX}.dll>$<$<CONFIG:release>:${TBB_LIBS_DIR}${CMAKE_RELEASE_POSTFIX}/tbb.dll>"  "${CMAKE_BINARY_DIR}/lib"
            COMMAND ${CMAKE_COMMAND} -E copy  "$<$<CONFIG:debug>:${TBB_LIBS_DIR}${CMAKE_DEBUG_POSTFIX}/tbbmalloc_${CMAKE_DEBUG_POSTFIX}.dll>$<$<CONFIG:release>:${TBB_LIBS_DIR}${CMAKE_RELEASE_POSTFIX}/tbbmalloc.dll>"  "${CMAKE_BINARY_DIR}/lib"
            COMMAND ${CMAKE_COMMAND} -E copy  "$<$<CONFIG:debug>:${TBB_LIBS_DIR}${CMAKE_DEBUG_POSTFIX}/tbbmalloc_proxy_${CMAKE_DEBUG_POSTFIX}.dll>$<$<CONFIG:release>:${TBB_LIBS_DIR}${CMAKE_RELEASE_POSTFIX}/tbbmalloc_proxy.dll>"  "${CMAKE_BINARY_DIR}/lib"
    )
endif ()

add_subdirectory("src")

现在，在src / external / openvdb 目录中的 CMakeLists.txt内部，我尝试链接这样的库：

project(OpenVDBCore) #define OPENVDB_LIBRARY_MAJOR_VERSION_NUMBER 4 #define OPENVDB_LIBRARY_MINOR_VERSION_NUMBER 0 #define OPENVDB_LIBRARY_PATCH_VERSION_NUMBER 0 #*********** I'm going to omit some lines here since ********** #*********** they're standard for the OpenVDB build *********** SET_SOURCE_FILES_PROPERTIES ( ${OPENVDB_LIBRARY_SOURCE_FILES} PROPERTIES COMPILE_FLAGS "-DOPENVDB_PRIVATE -DOPENVDB_USE_BLOSC ${OPENVDB_USE_GLFW_FLAG}" ) ADD_LIBRARY ( openvdb_static STATIC ${OPENVDB_LIBRARY_SOURCE_FILES} ) ADD_LIBRARY ( openvdb_shared SHARED ${OPENVDB_LIBRARY_SOURCE_FILES} ) TARGET_LINK_LIBRARIES ( openvdb_static zlib TBB_LIBS TBBMALLOC_LIBS ) TARGET_LINK_LIBRARIES ( openvdb_shared zlib TBB_LIBS TBBMALLOC_LIBS ) MESSAGE(STATUS "TBB_LIBS library location is ${TBB_LIBS}") MESSAGE(STATUS "TBBMALLOC_LIBS library location is ${TBBMALLOC_LIBS}")

您可以看到我在CMake中放置状态消息，以查看$ {TBB_LIBS}和$ {TBBMALLOC_LIBS}变量是什么......但该部分始终为空。因此，由CMake生成的openvdb_shared和openvdb_static项目文件也不能正确链接库（因为这些库是未知的）。有谁知道为什么会发生这种情况（以及如何解决）？

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0 个答案: