Using qtmotifextension with QT5

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http://stackoverflow.com – Currently I'm using qtmotifextension to connect QT world with old Motif UI on X11 Linux station. I'm trying to update towards QT5 but X11processEvent from QApplication has been removed. Is there an updated qtmotifextension from old qt-solutions available or is there any way to have X11processEvent from QT5? (HowTos)