QtCreator - 使用 CMake 构建和链接 OpenCascade

问题描述 投票：0回答：2

我想构建一个使用 OpenCascade 的项目。我还想构建所有的库。这取决于 freetype、tcl 和 tk。所以我也想建造所有这些。 我正在努力思考如何正确地做到这一点。我正在使用 Windows，如果这很重要的话。因此，在我开始摆弄试验/错误只是为了让它以某种方式工作之前，我想问一下使用 QtCreator 和 CMake 执行此操作的“正确”方法是什么。假设我的工具链已正确设置以构建 Qt 应用程序。

假设我的子文件夹结构是新下载的库：

mylibrary/main.cpp
occt-7_8_0/
freetype-2.10.4/
tcl8.5.0/
tk8.5.0/

我不想使用 VTK，我的 main.cpp 可能如下所示：

#include <TopoDS.hxx>
#include <BRepPrimAPI_MakeBox.hxx>
void makeBox(){
    gp_Pnt gp1(0,0,0);
    gp_Pnt gp2(1,1,1);

    TopoDS_Solid box = BRepPrimAPI_MakeBox(gp1, gp2).Solid();
}

mylibrary/ 的 CMakesList.txt 是

message("=== Occt wrapper as a lib ===")

add_library(mylibrary_lib SHARED)

if (CMAKE_COMPILER_IS_GNUCXX)
    add_compile_options(-Wa,-mbig-obj)
endif()
if (MSVC)
    set(CMAKE_CXX_FLAGS "${CMAKE_CXX_FLAGS} /bigobj")
endif()


# find_package(<module>) uses <module>Config.cmake-file in <module>_DIR path
find_package(OpenCASCADE REQUIRED)
target_include_directories(mylibrary_lib PRIVATE "${OpenCASCADE_INCLUDE_DIR}") # OCC is needed

if(NOT OpenCASCADE_FOUND)
    message(FATAL_ERROR "Cannot build the executable without OpenCASCADE. Please set the variable OpenCASCADE_DIR.")
else()
    message("    found OpenCASCADE " ${OpenCASCADE_VERSION})

    # include
    target_include_directories(mylibrary_lib PUBLIC ${OpenCASCADE_INCLUDE_DIR})
    message("    found OpenCASCADE_INCLUDE_DIR: ${OpenCASCADE_INCLUDE_DIR}" )
    # link
    target_link_libraries(mylibrary_lib PUBLIC ${OpenCASCADE_LIBRARIES}) # This should be private!
    message("    found OpenCASCADE_LIBRARIES: ${OpenCASCADE_LIBRARIES}" )
endif()
target_sources(mylibrary_lib PUBLIC "./main.cpp")

更新： 我尝试按照建议使用 vcpkg 。这就是我所做的：

  • 安装vcpkg： https://learn.microsoft.com/de-de/vcpkg/get_started/get-started?pivots=shell-cmd

    • 按照步骤 1“设置 vcpkg”进行操作
    • 找到并记住 vcpkg 文件夹的路径。
    • 在该文件夹中打开 CMD。
    • 输入以下命令安装 opencascade 软件包： 
      vcpkg --install opencascade

  • 设置 QtCreator

    • 安装并激活插件“Vcpkg”

    • 转到菜单编辑/首选项/CMake

      • 在 Vcpkg 选项卡下： 浏览vcpkg目录的路径
      • 在“常规”选项卡下： 检查“包管理器自动设置”选项

    • 重新启动QtCreator

    • 在库的 src 目录中创建 vcpkg.json，内容如下：

      {
    "dependencies": [
        "opencascade", "freetype", "tcl", "tk"
    ]
}

    • 或者使用QtCreator中的向导： https://doc.qt.io/qtcreator/creator-how-to-create-vcpkg-manifest-files.html

  • 在CMakesList.txt中添加： 

    find_package(OpenCASCADE CONFIG REQUIRED)

然后我清理了项目并单击“运行 CMake”。然而，输出是：

  Could not find a package configuration file provided by "opencascade" with
  any of the following names:

    opencascadeConfig.cmake
    opencascade-config.cmake

  Add the installation prefix of "opencascade" to CMAKE_PREFIX_PATH or set
  "opencascade_DIR" to a directory containing one of the above files.  If
  "opencascade" provides a separate development package or SDK, be sure it
  has been installed.

CMakeCache.txt 包含

//Value Computed by CMake.
CMAKE_FIND_PACKAGE_REDIRECTS_DIR:STATIC=C:/path/to/build/build-projectname-Desktop_Qt_5_15_2_MSVC2015_64bit-Debug/CMakeFiles/pkgRedirects

但是该文件夹是空的。

c++ cmake qt-creator opencascade
2个回答
0
投票

如果您正在使用 CMake，我建议您遵循这些说明。 我个人更喜欢使用CMake用户界面，我用第三方库编译OCCT没有任何障碍。

问候！

0
投票

我通过手动链接库“解决”了我的问题：

# How to use OCCT:
# - Compile OCCT using the provided CMakeLists.txt
# - Set the variable OpenCASCADE_DIR to the output directory of this build.
# - Separate debug/release builds will need separate directories.
# - Ensure the library directories are where to expect them. If not, change if for the
#   compiler you are using.
# - Follow the error messages of CMake
if(NOT EXISTS "${OpenCASCADE_DIR}")
    message(FATAL_ERROR "Set the variable OpenCASCADE_DIR to the output directory after building OCCT")
endif()

set(OpenCASCADE_VERSION "7.8.0")
# set(OpenCASCADE_DIR "${CMAKE_CURRENT_LIST_DIR}/../occt-vc143-64")
set(OpenCASCADE_INCLUDE_DIR "${OpenCASCADE_DIR}/inc")
set(OpenCASCADE_LIBRARIES
    "TKernel" "TKMath" "TKG2d" "TKG3d" "TKGeomBase" "TKBRep" "TKGeomAlgo" "TKTopAlgo" "TKPrim" "TKBO" "TKShHealing" "TKBool" "TKHLR" "TKFillet" "TKOffset" "TKFeat" "TKMesh" "TKXMesh" "TKService" "TKV3d" "TKCDF" "TKLCAF" "TKCAF" "TKBinL" "TKXmlL" "TKBin" "TKXml" "TKStdL" "TKStd" "TKTObj" "TKBinTObj" "TKXmlTObj" "TKVCAF"
) # "TKOpenGl" "TKOpenGles" "TKMeshVS" "TKD3DHost" "TKDE" "TKXSBase" "TKDESTEP" "TKXCAF" "TKDEIGES" "TKDESTL" "TKDEVRML" "TKRWMesh" "TKDECascade" "TKBinXCAF" "TKXmlXCAF" "TKDEOBJ" "TKDEGLTF" "TKDEPLY" "TKDraw" "TKTopTest" "TKOpenGlTest" "TKViewerTest" "TKOpenGlesTest" "TKD3DHostTest" "TKXSDRAW" "TKDCAF" "TKXDEDRAW" "TKTObjDRAW" "TKQADraw" "TKIVtkDraw" "TKXSDRAWDE" "TKXSDRAWGLTF" "TKXSDRAWIGES" "TKXSDRAWOBJ" "TKXSDRAWPLY" "TKXSDRAWSTEP" "TKXSDRAWSTL" "TKXSDRAWVRML"
if( ("${CMAKE_BUILD_TYPE}" STREQUAL "Debug") OR ("${CMAKE_BUILD_TYPE}" STREQUAL "DEBUG"))
    set(OpenCASCADE_LIBRARY_DIR "${OpenCASCADE_DIR}/win64/vc14/libd") # d for debug
    set(OpenCASCADE_BINARY_DIR "${OpenCASCADE_DIR}/win64/vc14/bind") # d for debug
else()
    set(OpenCASCADE_LIBRARY_DIR "${OpenCASCADE_DIR}/win64/vc14/lib")
    set(OpenCASCADE_BINARY_DIR "${OpenCASCADE_DIR}/win64/vc14/bin")
endif()

set(OpenCASCADE_FOUND ON)

target_include_directories(occscene_lib PRIVATE "${OpenCASCADE_INCLUDE_DIR}") 

if(NOT OpenCASCADE_FOUND)
    message(FATAL_ERROR "Cannot build the executable without OpenCASCADE. Please set the variable OpenCASCADE_DIR.")
else()
    message("    found OpenCASCADE " ${OpenCASCADE_VERSION})

    if(NOT APP_USE_VTK)
        list(REMOVE_ITEM OpenCASCADE_LIBRARIES TKIVtk)
    endif()

    # include
    target_include_directories(occscene_lib PUBLIC ${OpenCASCADE_INCLUDE_DIR})
    message("    found OpenCASCADE_INCLUDE_DIR: ${OpenCASCADE_INCLUDE_DIR}" )

    # link
    foreach(libname IN LISTS OpenCASCADE_LIBRARIES)
        set(libpath "${OpenCASCADE_LIBRARY_DIR}/${libname}.lib")
        if(EXISTS ${libpath})
            target_link_libraries(occscene_lib PUBLIC ${libpath}) # This should be private!
        else()
            message("lib not found: ${libpath}")
        endif()
    endforeach()

    # copy dlls
    foreach(libname IN LISTS OpenCASCADE_LIBRARIES)
        set(dllpath "${OpenCASCADE_BINARY_DIR}/${libname}.dll")
        if(EXISTS ${dllpath})
            file(COPY_FILE "${dllpath}" "${CMAKE_BINARY_DIR}/${libname}.dll" ONLY_IF_DIFFERENT)
            # also the pdb for debugging
            set(dllpath "${OpenCASCADE_BINARY_DIR}/${libname}.pdb")
            if(EXISTS ${dllpath})
                file(COPY_FILE "${dllpath}" "${CMAKE_BINARY_DIR}/${libname}.pdb" ONLY_IF_DIFFERENT)
            endif()
        else()
            message("dll not found: ${dllpath}")
        endif()
    endforeach()


    #find_library
    #target_link_directories(occscene_lib PUBLIC ${OpenCASCADE_LIBRARY_DIR})
    #target_link_libraries(occscene_lib PUBLIC ${OpenCASCADE_LIBRARIES}) # This should be private!
    message("    found OpenCASCADE_LIBRARIES: ${OpenCASCADE_LIBRARIES}" )
endif()

我不知道这对任何人是否有帮助，我确信有更好的（=官方）方法来做到这一点。

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