Update Qt 5.9.5 to Qt 5.12 in Ubuntu 18.04 LTS

[Colin Watson]

On Mon, Nov 18, 2019 at 12:02:49PM -0400, Kevin wrote:
> A recent article in  Linux Pro Magazine (July 2019 Issue 224) concerned the
> installation of 'Barrier'
> allowing use of one mouse/keyboard with two or more computers.
> Barrier requires Qt 5.12 as a dependency.

Trying to upgrade Qt when the Ubuntu release you're running ships an
older one is probably not going to go well and I wouldn't recommend it.
I see that there's a snap of Barrier, though, so perhaps "snap install
barrier" would work for you?  That way it'll bundle its own dependencies
and not interfere with the ones you have on the system.

-- 
Colin Watson                                       [cjwatson at ubuntu.com]