[Development] Build system for Qt 6

[Oswald Buddenhagen]

On Tue, Oct 30, 2018 at 09:10:27AM -0700, Thiago Macieira wrote:
> Is it packaged in a Linux distribution? My requirements also included
> continuously packaged for 2 years in at least 3 Linux distributions,
> at the time of the Qt switch to the particular buildsystem.
> 
it's been packaged for much longer and by more distros already, because
it's part of qt creator for quite a while. i don't know whether all of
them ship it as separate packages already, but the official messaging
from us was that they *should*.