[Development] Proposing CMake as build tool for Qt 6

[Matthew Woehlke]

On 15/06/2019 15.22, Bogdan Vatra via Development wrote:
>  - no multi ABIs builds in one go (needed for msvc and useful also for 
> Android). 
...but MSVC has *never* built multiple ABI's in one go.

OTOH, MSVC is a multi-config generator and *does* support multiple ABI's
in a single build tree.

-- 
Matthew