QtMultimedia module fails to build with Clang in 32-bit

clang -c -pipe -mmacosx-version-min=10.6 -arch i386 -stdlib=libc++ -g -gdwarf-2 -std=c++11 -fvisibility=hidden -fvisibility-inlines-hidden -Wall -W -DQT_NO_LIBUDEV -DQT_NO_EVDEV -DQT_NO_XCB -DQMEDIA_QT7_PLAYER -DQT_NO_KEYWORDS -DQT_PLUGIN -DQT_MULTIMEDIAWIDGETS_LIB -DQT_OPENGL_LIB -DQT_MULTIMEDIA_LIB -DQT_WIDGETS_LIB -DQT_NETWORK_LIB -DQT_GUI_LIB -DQT_CORE_LIB -DQT_NO_EXCEPTIONS -D_LARGEFILE64_SOURCE -D_LARGEFILE_SOURCE -I/Qt/5.0/qtbase/mkspecs/macx-clang-libc++-32 -I. -Imediaplayer -I/Qt/5.0/qtbase/include -I/Qt/5.0/qtbase/include/QtMultimediaWidgets -I/Qt/5.0/qtbase/include/QtMultimediaWidgets/5.0.0 -I/Qt/5.0/qtbase/include/QtMultimediaWidgets/5.0.0/QtMultimediaWidgets -I/Qt/5.0/qtbase/include/QtOpenGL -I/Qt/5.0/qtbase/include/QtMultimedia -I/Qt/5.0/qtbase/include/QtMultimedia/5.0.0 -I/Qt/5.0/qtbase/include/QtMultimedia/5.0.0/QtMultimedia -I/Qt/5.0/qtbase/include/QtWidgets -I/Qt/5.0/qtbase/include/QtNetwork -I/Qt/5.0/qtbase/include/QtGui -I/Qt/5.0/qtbase/include/QtCore -I.moc/debug-shared -I/System/Library/Frameworks/OpenGL.framework/Versions/A/Headers -I/System/Library/Frameworks/AGL.framework/Headers -F/Qt/5.0/qtbase/lib mediaplayer/qt7playersession.mm -o .obj/debug-shared/qt7playersession.o
qt7movierenderer.mm:342:57: error: incomplete type 'QGLContext' named in nested name specifier
            (m_usingGLContext && (m_currentGLContext != QGLContext::currentContext())) ||
                                                        ^~~~~~~~~~~~
/Qt/5.0/qtbase/include/QtWidgets/../../src/widgets/kernel/qwidget.h:695:18: note: forward
      declaration of 'QGLContext'
    friend class QGLContext;
                 ^
qt7movierenderer.mm:356:38: error: incomplete type 'QGLContext' named in nested name specifier
                m_currentGLContext = QGLContext::currentContext();
                                     ^~~~~~~~~~~~
/Qt/5.0/qtbase/include/QtWidgets/../../src/widgets/kernel/qwidget.h:695:18: note: forward
      declaration of 'QGLContext'
    friend class QGLContext;
                 ^