我一直在尝试构建ParaView来测试MacOS上的自定义应用示例here。
我已遵循超级构建here的站点说明。
我似乎在Qt部分有问题。
这是我完成的步骤：
$ mkdir pv
$ cd pv
$ git clone https://gitlab.kitware.com/paraview/paraview-superbuild.git
$ cd paraview-superbuild
$ git fetch origin # ensure you have the latest state from the main repo
$ git submodule update
$ cd ..
$ mkdir paraview_build
$ cd paraview_build
$ cmake ../paraview-superbuild
$ ccmake -DCMAKE_OSX_SDK=macosx10.14 ../paraview-superbuild
我启用了CMake变量：
ENABLE_qt5
ENABLE_python
ENABLE_python2
然后跑了：
$ make
我得到的错误：
[ 87%] Performing build step for 'qt5'
Info: creating cache file /Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/build/qtbase/.qmake.cache
ld: warning: direct access in function 'QHash<QString, int>::insert(QString const&, int const&)' from file '/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/build/qtbase/lib/libQt5Bootstrap.a(qcommandlineparser.o)' to global weak symbol 'QHash<QString, int>::deleteNode2(QHashData::Node*)' from file '.obj/rcc.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
ld: warning: direct access in function 'QHash<QString, int>::insert(QString const&, int const&)' from file '/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/build/qtbase/lib/libQt5Bootstrap.a(qcommandlineparser.o)' to global weak symbol 'QHash<QString, int>::deleteNode2(QHashData::Node*)' from file '.obj/rcc.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
ld: warning: direct access in function 'QHash<QString, int>::insert(QString const&, int const&)' from file '/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/build/qtbase/lib/libQt5Bootstrap.a(qcommandlineparser.o)' to global weak symbol 'QHash<QString, int>::duplicateNode(QHashData::Node*, void*)' from file '.obj/rcc.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
ld: warning: direct access in function 'QCommandLineParserPrivate::~QCommandLineParserPrivate()' from file '/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/build/qtbase/lib/libQt5Bootstrap.a(qcommandlineparser.o)' to global weak symbol 'QHash<QString, int>::deleteNode2(QHashData::Node*)' from file '.obj/rcc.o' means the weak symbol cannot be overridden at runtime. This was likely caused by different translation units being compiled with different visibility settings.
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: ../../../lib/libqtharfbuzz.a(hb-warning.o) has no symbols
/Applications/Xcode.app/Contents/Developer/Toolchains/XcodeDefault.xctoolchain/usr/bin/ranlib: file: ../../../lib/libqtharfbuzz.a(hb-warning.o) has no symbols
Makefile:2392: warning: overriding commands for target `../../lib/QtGui.framework/Versions/5/Headers/QGenericPlugin'
Makefile:2024: warning: ignoring old commands for target `../../lib/QtGui.framework/Versions/5/Headers/QGenericPlugin'
Makefile:2396: warning: overriding commands for target `../../lib/QtGui.framework/Versions/5/Headers/QGenericPluginFactory'
Makefile:2020: warning: ignoring old commands for target `../../lib/QtGui.framework/Versions/5/Headers/QGenericPluginFactory'
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/network/access/qnetworkaccessdebugpipebackend_p.h:0: Note: No relevant classes found. No output generated.
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm:833:20: error: qualified reference to 'QFixed' is a constructor name rather than a type in this context
return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
^
1 error generated.
make[7]: *** [.obj/qfontengine_coretext.o] Error 1
make[7]: *** Waiting for unfinished jobs....
make[6]: *** [sub-fontdatabases-make_first] Error 2
make[5]: *** [sub-platformsupport-make_first] Error 2
make[5]: *** Waiting for unfinished jobs....
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/widgets/widgets/qdialogbuttonbox.cpp:868:14: warning: comparison of two values with different enumeration types in switch statement ('QDialogButtonBox::ButtonRole' and 'QPlatformDialogHelper::ButtonRole') [-Wenum-compare-switch]
case QPlatformDialogHelper::HelpRole:
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/widgets/widgets/qdialogbuttonbox.cpp:865:14: warning: comparison of two values with different enumeration types in switch statement ('QDialogButtonBox::ButtonRole' and 'QPlatformDialogHelper::ButtonRole') [-Wenum-compare-switch]
case QPlatformDialogHelper::NoRole:
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/widgets/widgets/qdialogbuttonbox.cpp:864:14: warning: comparison of two values with different enumeration types in switch statement ('QDialogButtonBox::ButtonRole' and 'QPlatformDialogHelper::ButtonRole') [-Wenum-compare-switch]
case QPlatformDialogHelper::RejectRole:
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/widgets/widgets/qdialogbuttonbox.cpp:861:14: warning: comparison of two values with different enumeration types in switch statement ('QDialogButtonBox::ButtonRole' and 'QPlatformDialogHelper::ButtonRole') [-Wenum-compare-switch]
case QPlatformDialogHelper::YesRole:
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/widgets/widgets/qdialogbuttonbox.cpp:860:14: warning: comparison of two values with different enumeration types in switch statement ('QDialogButtonBox::ButtonRole' and 'QPlatformDialogHelper::ButtonRole') [-Wenum-compare-switch]
case QPlatformDialogHelper::AcceptRole:
^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
5 warnings generated.
make[4]: *** [sub-src-make_first] Error 2
make[3]: *** [module-qtbase-make_first] Error 2
CMake Error at /Users/username/Desktop/dev/pv/paraview_build/superbuild/sb-qt5-build.cmake:47 (message):
Failed with exit code 2
make[2]: *** [superbuild/qt5/stamp/qt5-build] Error 1
make[1]: *** [superbuild/CMakeFiles/qt5.dir/all] Error 2
make: *** [all] Error 2
我该怎么办？
日志中的错误：
qfontengine_coretext.mm:833:20: error: qualified reference to 'QFixed' is a constructor name rather than a type in this context
是由Qt 5.9.5的已知错误引起的，已记录在here中。那里也有MacOS修复程序，其中涉及修改qfontengine_coretext.mm文件中的一行代码。您的文件位于此处：
/Users/username/Desktop/dev/pv/paraview_build/superbuild/qt5/src/qtbase/src/platformsupport/fontdatabases/mac/qfontengine_coretext.mm
在第833行，从此更改return语句：
QFixed QCoreTextFontEngine::emSquareSize() const
{
return QFixed::QFixed(int(CTFontGetUnitsPerEm(ctfont)));
}
为此（删除多余的QFixed::，使其不再指定构造函数）：
QFixed QCoreTextFontEngine::emSquareSize() const
{
return QFixed(int(CTFontGetUnitsPerEm(ctfont)));
}
然后，重新运行make以验证更新的源代码已解决此问题。