Initialization functions not called for AudioCore in IOS

The registration class of QAudio namespace is not being instantiated, I assumed it is because of the static linkage and the global instance not being used.
So no types are registered with the metatype facility, to work around this make the following calls somewhere:
qRegisterMetaType<QAudio::Error>();
qRegisterMetaType<QAudio::State>();
qRegisterMetaType<QAudio::Mode>();