使用通过CMake中的brew安装的Qwt

问题描述

限时删除！！

我尝试在MacOS虚拟机上使用Qwt和CMake来构建应用程序.

I Try to build an application using Qwt with CMake on a MacOS virtual machine.

我使用brew安装了Qt5和Qwt:

I installed Qt5 and Qwt using brew:

酿造qt5 qwt

结果是安装了Qwt框架.

The result is a Qwt framework installation.

标题在那里:

/usr/local/Cellar/qwt/6.1.4/lib/qwt.framework/Versions/6/Headers/qwt.h

图书馆在这里

文件/usr/local/Cellar/qwt/6.1.4/lib/qwt.framework/qwt/usr/local/Cellar/qwt/6.1.4/lib/qwt.framework/qwt:Mach-O 64位动态链接的共享库x86_64

在使用qmake进行buid期间很容易使用它

It is easy to use it during buid with qmake

LIBS + = -F/usr/local/Cellar/qwt/6.1.4/libLIBS + =-框架qwt

但是我仍然坚持使用 CMake .我没有成功找到方法.

but I'm stuck with CMake.I don't succeed to find how to do the same.

我已经根据CMake文档中指示的find_library编写了自己的 FindQwt 模块.它在Linux上运行良好，但没有以下技巧，我无法成功使其在MacOS上运行:

I have written my own FindQwt module based on find_library has indicated in CMake documentation.It works very well on Linux but I don't succeed to make it works on MacOS without the following hacks:

符号链接使qwt标头出现在包含目录中，而 qwt 作为 libqwt.dyn_lib :

symbolic links to make appear qwt headers in an include directory and qwt as libqwt.dyn_lib:

ln -sf/usr/local/Cellar/qwt/6.1.4/lib/qwt.framework/Versions/6/Headers/usr/local/Cellar/qwt/6.1.4/includeln -sf/usr/local/Cellar/qwt/6.1.4/lib/qwt.framework/qwt/usr/local/Cellar/qwt/6.1.4/libqwt.dylib

我还必须删除/usr/local/lib/qwt.framework(在/usr/local/Cellar/qwt/6.1.4/lib/qwt.framework上的符号链接)，这是我在前2次黑客攻击后由FindQwt Cmake模块找到的，但我没有找到任何原因，并且导致了链接问题(ld错误22)

I also have to remove /usr/local/lib/qwt.framework ( symbolic link on /usr/local/Cellar/qwt/6.1.4/lib/qwt.framework ) that was found by my FindQwt Cmake module after the 2 previous hack but I don't find any reason for that and was causing a link issue ( ld error 22 )

这是我的Qwt cmake模块的代码

Here is the code of my Qwt cmake module

find_package(PkgConfig)
pkg_check_modules(PC_QWT QUIET libqwt)
if("${PC_QWT}" STREQUAL "")
    set(QWT_HINTS $ENV{QWT_INSTALL})

    set(QWT_PATHS
        /usr
        /usr/local/
        /usr/local/share/
        /usr/share/
       )
    if(NOT ${QWT_HINTS} STREQUAL "")
        set(QWT_PATHS ${QWT_HINTS})
    endif(NOT ${QWT_HINTS} STREQUAL "")

    find_path(Qwt_INCLUDE_DIR
              NAMES qwt.h
              PATHS ${QWT_PATHS}
              HINTS ${QWT_HINTS}
              PATH_SUFFIXES include qwt-qt4 qwt-qt5 qwt
              DOC "Variable storing the location of Qwt header"
             )

    set(ARCH_SUFFIX "lib")
    if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
      set(ARCH_SUFFIX "")
    endif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")

    find_library(Qwt_LIBRARY
                 NAMES qwt qwt-qt4 qwt-qt5
                 PATHS ${QWT_PATHS}
                 HINTS ${QWT_HINTS}
                 PATH_SUFFIXES ${ARCH_SUFFIX}
                 DOC "Variable storing the location of Qwt library"
                 NO_DEFAULT_PATH
                 NO_CMAKE_PATH
                )

    set(Qwt_VERSION ${Qwt_FIND_VERSION})
    include(FindPackageHandleStandardArgs)
    find_package_handle_standard_args(Qwt
                                      FOUND_VAR Qwt_FOUND
                                      REQUIRED_VARS
                                      Qwt_LIBRARY
                                      Qwt_INCLUDE_DIR
                                      VERSION_VAR Qwt_VERSION
                                      )

    if(Qwt_FOUND)
        set(Qwt_LIBRARIES ${Qwt_LIBRARY})
        set(Qwt_INCLUDE_DIRS ${Qwt_INCLUDE_DIR})
        #set(Qwt_DEFINITIONS ${PC_Qwt_CFLAGS_OTHER})
    endif()
    if(Qwt_FOUND AND NOT TARGET Qwt::Qwt)
        add_library(Qwt::Qwt UNKNOWN IMPORTED)
        set_target_properties(Qwt::Qwt PROPERTIES
        IMPORTED_LOCATION "${Qwt_LIBRARY}"
        INTERFACE_COMPILE_OPTIONS ""
        INTERFACE_INCLUDE_DIRECTORIES "${Qwt_INCLUDE_DIR}")
    endif()
endif("${PC_QWT}" STREQUAL "")

如果您有一些想法可以避免上述黑客攻击，并通过CMake模块以更优雅的方式处理它们，将受到欢迎

If you have some ideas some ideas to avoid the hacks described above and hanle it in a more elegant way with CMake module they will be welcomed

解决方案可以运行，而无需先前描述的黑客攻击

• 请参阅与Qwt版本无关的 usr/local/opt/qwt/lib
• 使用以下经过修改的CMake模块，这要归功于Pedro的回答(主要修改与结尾处的目标属性有关，而对标题搜索的影响很小)

这是代码

find_package(PkgConfig)
pkg_check_modules(PC_QWT QUIET libqwt)
if("${PC_QWT}" STREQUAL "")
    set(QWT_HINTS $ENV{QWT_INSTALL})

    set(QWT_PATHS
        /usr
        /usr/local/
        /usr/local/share/
        /usr/share/
       )
    if(NOT ${QWT_HINTS} STREQUAL "")
        set(QWT_PATHS ${QWT_HINTS})
    endif(NOT ${QWT_HINTS} STREQUAL "")

    find_path(Qwt_INCLUDE_DIR
              NAMES qwt.h
              PATHS ${QWT_PATHS}
              HINTS ${QWT_HINTS}
              PATH_SUFFIXES include qwt-qt4 qwt-qt5 qwt Headers
              DOC "Variable storing the location of Qwt header"
             )

    set(ARCH_SUFFIX "lib")
    if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
       set(ARCH_SUFFIX "")
    endif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")

    find_library(Qwt_LIBRARY
                 NAMES qwt qwt-qt4 qwt-qt5
                 PATHS ${QWT_PATHS}
                 HINTS ${QWT_HINTS}
                 PATH_SUFFIXES ${ARCH_SUFFIX}
                 DOC "Variable storing the location of Qwt library"
                )

    set(Qwt_VERSION ${Qwt_FIND_VERSION})
    include(FindPackageHandleStandardArgs)
    find_package_handle_standard_args(Qwt
                                      FOUND_VAR Qwt_FOUND
                                      REQUIRED_VARS
                                      Qwt_LIBRARY
                                      Qwt_INCLUDE_DIR
                                      VERSION_VAR Qwt_VERSION
                                     )

    if(Qwt_FOUND)
        set(Qwt_LIBRARIES ${Qwt_LIBRARY})
        set(Qwt_INCLUDE_DIRS ${Qwt_INCLUDE_DIR})
    endif()
    if(Qwt_FOUND AND NOT TARGET Qwt::Qwt)
        if("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
            get_filename_component(FRAMEWORK_LOC ${Qwt_LIBRARY} DIRECTORY)
            add_library(Qwt::Qwt INTERFACE IMPORTED)
            set_target_properties(Qwt::Qwt PROPERTIES
                                  INTERFACE_COMPILE_OPTIONS ""
                                  INTERFACE_INCLUDE_DIRECTORIES "${Qwt_INCLUDE_DIR}"
                                  )

            target_link_libraries(Qwt::Qwt INTERFACE "-F${FRAMEWORK_LOC} -framework qwt")
        else("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
            add_library(Qwt::Qwt UNKNOWN IMPORTED)
            set_target_properties(Qwt::Qwt PROPERTIES
                                  IMPORTED_LOCATION "${Qwt_LIBRARIES}"
                                  INTERFACE_COMPILE_OPTIONS ""
                                  INTERFACE_INCLUDE_DIRECTORIES "${Qwt_INCLUDE_DIR}"
                                  )
        endif("${CMAKE_SYSTEM_NAME}" STREQUAL "Darwin")
    endif()
endif("${PC_QWT}" STREQUAL "")

推荐答案

假定您已经熟悉 cmake/qt基础知识，这是我的建议:

Assuming that you are already familiar with cmake/qt basics, this is my proposal:

if(APPLE)
    set(CMAKE_FIND_FRAMEWORK ONLY)
    find_library(QWT
        NAMES qwt
        HINTS /usr/local/opt/qwt/lib/
        REQUIRED)
    if(QWT)
        include_directories(${QWT}/Headers)
        link_libraries(${QWT})
        message("QWT found: ${QWT}")
    endif()
endif()

CMake变量 CMAKE_FIND_FRAMEWORK 影响find_ *命令如何选择macOS框架和Unix风格的dylib.您可能会注意到，使用上面的代码片段输出执行cmake:

The CMake variable CMAKE_FIND_FRAMEWORK affects how find_* commands choose between macOS Frameworks and unix-style dylibs. You may observe that executing cmake with the above snippet outputs:

QWT found: /usr/local/Cellar/qwt/6.1.4/lib/qwt.framework

此代码段将qwt框架添加到CMakeLists.txt中定义的任何目标，但是您可能更喜欢将链接部分仅应用于一个目标，如下所示:

This snippet adds the qwt framework to any target defined in your CMakeLists.txt, but you may prefer to apply the link part to only one target, like this:

target_link_libraries(yourtarget ${QWT})

另一个警告:您应该将程序链接到由Qwt链接的相同Qt5框架，并且也要通过brew安装:QTDIR =/usr/local/opt/qt5

Another caveat: you should link your program to the same Qt5 frameworks linked by Qwt, and also installed by brew: QTDIR=/usr/local/opt/qt5

这篇关于使用通过CMake中的brew安装的Qwt的文章就介绍到这了，希望我们推荐的答案对大家有所帮助，也希望大家多多支持！

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