I've successfully built all qt5 packages (available from Koji) for
CentOS 6 i686. I only had to tweak a little bit for system clucene.
Otherwise it was very smooth.
The following things seem to be missing/unpackaged:
1. No documentation files are created. Perhaps they were meant to be
included as a separate package
2. Qt Serial port - this module does not seem to be packaged
I'm not sure if anything else is missing. The Qt source directory
contains one more directory on QtQuick (1 or 2, don't remember exactly).
Dear Rex, can you throw some light on this..