The following error happens when building with GCC 4.8.5:
no matching function for call to ‘QObject::connect(QPointer<T>&, ...)’
no matching function for call to ‘QObject::disconnect(QPointer<T>&, ...)’
There is a simular problem in qtlocation, see Qt bug report:
https://bugreports.qt.io/browse/QTBUG-69512
It's apparently a compiler bug fixed in GCC 5.x and later.
Signed-off-by: Stephan Linz <linz@li-pro.net>