qtmultimedia does not build against osx sdk 10.8

error	17-May-2015 11:33:25	/Volumes/build/bamboo-build/THIRDP-QT-BUILDMAC/qtmultimedia/src/plugins/avfoundation/camera/avfcamerautility.mm:62:25: error: property 'supportsVideoMaxFrameDuration' not found on object of type 'AVCaptureConnection *'; did you mean 'supportsVideoMinFrameDuration'?
error	17-May-2015 11:33:25	    if (videoConnection.supportsVideoMaxFrameDuration) {
error	17-May-2015 11:33:25	                        ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~
error	17-May-2015 11:33:25	                        supportsVideoMinFrameDuration
error	17-May-2015 11:33:25	/Applications/Xcode.app/Contents/Developer/Platforms/MacOSX.platform/Developer/SDKs/MacOSX10.8.sdk/System/Library/Frameworks/AVFoundation.framework/Headers/AVCaptureSession.h:949:78: note: 'supportsVideoMinFrameDuration' declared here
error	17-May-2015 11:33:25	@property(nonatomic, readonly, getter=isVideoMinFrameDurationSupported) BOOL supportsVideoMinFrameDuration NS_AVAILABLE(10_7, 5_0);
error	17-May-2015 11:33:25	                                                                             ^
error	17-May-2015 11:33:25	/Volumes/build/bamboo-build/THIRDP-QT-BUILDMAC/qtmultimedia/src/plugins/avfoundation/camera/avfcamerautility.mm:63:46: error: property 'videoMaxFrameDuration' not found on object of type 'AVCaptureConnection *'; did you mean 'videoMinFrameDuration'?
error	17-May-2015 11:33:25	        const CMTime cmMax = videoConnection.videoMaxFrameDuration;
error	17-May-2015 11:33:25	                                             ^~~~~~~~~~~~~~~~~~~~~
error	17-May-2015 11:33:25	                                             videoMinFrameDuration
error	17-May-2015 11:33:25