[Development] Qt 5.9

[Tim Blechmann]

hi all,

>>> The currently sold CPU's are not really the measurement stick here. The
>>> measurement stick is actually installed Win 32 systems.
>> Yes, but what's the 32-bit Windows install base which is capable of running
>> Qt? We only support Windows 7 and above now, so I can't imagine it's very
>> many. Perhaps we should try to find some metrics to base our decision on.
> 
> That's an important point: since Qt 5.7, we no longer support anything older 
> than Windows 7. That was the first Windows with decent 64-bit support and 
> computers with Windows 7, 8, 8.1 and now 10 tended to come with the 64-bit 
> version pre-installed. So the chances of users running 64-bit Windows are much 
> higher now.

when using qt inside a plugin it is not necessarily a question how many
users are on 64-bit windows, but how many are on 64-bit hosts, as 32-bit
host can run on 64-bit windows.

i don't care about the binary packages, though. as long as i can still
build from sources, i'm fine ... but please don't completely drop
support for 32-bit windows.

cheers,
tim