Building QtMultimedia for iOS fails with XCode 7.3

/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.mm:94:9cd extras/ && ( test -e Makefile || /Users/macuser/qtbuild/build_ios5.6.0/qtbase/bin/qmake /Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtquickcontrols/src/extras/extras.pro -o Makefile ) && /Applications/Xcode.app/Contents/Developer/usr/bin/make -f Makefile 
: error: 'm_writerQueue' is unavailable
        m_writerQueue = writerQueue;
        ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:83:29: note: declaration uses __weak, but ARC is disabled
    __weak dispatch_queue_t m_writerQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.mm:96:9: error: 'm_delegateQueue' is unavailable
        m_delegateQueue = delegateQueue;
        ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:87:29: note: declaration uses __weak, but ARC is disabled
    __weak dispatch_queue_t m_delegateQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.mm:200:24: error: 'm_delegateQueue' is unavailable
        dispatch_async(m_delegateQueue, ^{
                       ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:87:29: note: declaration uses __weak, but ARC is disabled
    __weak dispatch_queue_t m_delegateQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.mm:224:20: error: 'm_delegateQueue' is unavailable
    dispatch_async(m_delegateQueue, ^{
                   ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:87:29: note: declaration uses __weak, but ARC is disabled
    __weak dispatch_queue_t m_delegateQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.mm:318:24: error: 'm_writerQueue' is unavailable
        dispatch_async(m_writerQueue, ^{
                       ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:83:29: note: declaration uses __weak, but ARC is disabled
    __weak dispatch_queue_t m_writerQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.mm:322:24: error: 'm_writerQueue' is unavailable
        dispatch_async(m_writerQueue, ^{
                       ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:83:29: note: declaration uses __weak, but ARC is disabled
    __weak dispatch_queue_t m_writerQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:83:29: error: cannot create __weak reference in file using manual reference counting
    __weak dispatch_queue_t m_writerQueue;
                            ^
/Users/macuser/qtbuild/qt-everywhere-opensource-src-5.6.0/qtmultimedia/src/plugins/avfoundation/camera/avfmediaassetwriter.h:87:29: error: cannot create __weak reference in file using manual reference counting
    __weak dispatch_queue_t m_delegateQueue;

./configure -sdk iphoneos -xplatform macx-ios-clang -release -commercial -no-icu -confirm-license \
  -skip qt3d -skip qtserialbus -skip qtserialport -skip qtandroidextras -skip qtwebengine -skip qtactiveqt -skip qtwayland -skip qtenginio -skip qtx11extras -skip qtwinextras -skip qttools \
  -no-compile-examples -nomake tests -no-sql-mysql -nomake examples -qt-zlib -qt-libpng -qt-libjpeg -qt-freetype -qt-pcre -qt-harfbuzz