I just installed qt5 for the first time because the latest virtualbox requires it. Now virtualbox 5.1.0 won't build because it can't find /usr/lib64/qt5/bin/lrelease, which (I think) should be in the qtcore package.
I copied lrelease from qtcore-4, which worked around that problem but now vbox fails to build because of an undefined GL variable, so I've got other (useflag?) problems to solve, but meanwhile I'd be grateful for any hints. Thanks.