qtwebkit build failed

...
In file included from WebKit/qt/WidgetApi/qwebpage.cpp:30:
In file included from WebKit/qt/WidgetSupport/PageClientQt.h:32:
In file included from WebKit/qt/WidgetApi/qwebframe_p.h:24:
In file included from WebKit/qt/WebCoreSupport/QWebFrameAdapter.h:23:
WebKit/qt/WebCoreSupport/FrameLoaderClientQt.h:227:48: warning: 'createNetworkingContext' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
    virtual PassRefPtr<FrameNetworkingContext> createNetworkingContext();
                                               ^
WebCore/loader/FrameLoaderClient.h:320:52: note: overridden virtual function is here
        virtual PassRefPtr<FrameNetworkingContext> createNetworkingContext() = 0;
                                                   ^
In file included from WebKit/qt/WidgetApi/qwebpage.cpp:31:
WebKit/qt/WidgetSupport/QGraphicsWidgetPluginImpl.h:38:18: warning: 'setVisible' overrides a member function but is not marked 'override' [-Winconsistent-missing-override]
    virtual void setVisible(bool);
                 ^
WebKit/qt/WebCoreSupport/QtPluginWidgetAdapter.h:35:18: note: overridden virtual function is here
    virtual void setVisible(bool) = 0;
                 ^
WebKit/qt/WidgetApi/qwebpage.cpp:500:17: warning: enumeration value 'NoType' not handled in switch [-Wswitch]
        switch (item.type) {
                ^
WebKit/qt/WidgetApi/qwebpage.cpp:3146:82: error: no member named 'operator int' in 'QFlags<QWebPage::FindFlag>'
    return d->findText(subString, static_cast<QWebPageAdapter::FindFlag>(options.operator int()));
                                                                         ~~~~~~~ ^
209 warnings generated.
220 warnings and 1 error generated.
make[3]: *** [.obj/debug/WebKit/qt/WidgetApi/qwebpage.o] Error 1
make[3]: *** Waiting for unfinished jobs....
174 warnings generated.
make[2]: *** [debug-all] Error 2
make[1]: *** [sub-widgetsapi-pri-make_first-ordered] Error 2
make: *** [sub-Source-QtWebKit-pro-make_first-ordered] Error 2