[Development] Raising minimum CMake version to 3.16 for Qt6

[Thiago Macieira]

On Wednesday, 5 May 2021 13:52:52 PDT Kyle Edwards via Development wrote:
> CMake upstream here. We recommend always using the very latest patch
> version of CMake, since it is backwards compatible and can
> (theoretically, bugs notwithstanding) build CMake projects written for
> any earlier version of CMake. You are correct that upgrading CMake is
> generally easy, though it admittedly may not be feasible if you insist
> on sticking with the version provided by the distro (though we do
> provide Ubuntu .deb builds of the latest version.)

Hello Kyle

Always using the latest is a good recommendation. The question is the minimum 
we can reasonably require the users to have installed. Upgrading is easy, but 
it's not as way as "$PKGCOMMAND install cmake" (where PKGCOMMAND is apt-get, 
zypper, dnf, yum, opkg, whatever), so requiring a version higher than the one 
users are likely to have creates a barrier for entry.

-- 
Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel DPG Cloud Engineering