Make qmake use qt5 by default

Question

I have both qt4 and qt5 on my Linux system. qt4 is used by default. What is a clean way to change that so that qmake uses qmake-qt5 by default?

Answer 1

The system might have different meta packages that handle the default. For example on Debian there is a qt4-default and a qt5-default package, installing one of them will uninstall the other and set the symlinks appropriately