[Development] Proposal: Deprecating platforms in Qt 5.6 that don't support lambda

[Rafael Roquetto]

On Fri, Feb 20, 2015 at 02:37:09PM +0100, Olivier Goffart wrote:
> On Friday 20 February 2015 11:17:51 Rafael Roquetto wrote:
> > On Fri, Feb 20, 2015 at 12:32:45PM +0100, Olivier Goffart wrote:
> > > On Friday 20 February 2015 11:15:32 BogDan wrote:
> > > > I fully agree with you, but, sadly, I think it will not be possible in
> > > > 5.x.
> > > 
> > > We started supporting C++98 during the course of Qt 4.x.
> > > We dropped MSVC 6, in Qt 4.5 (despite there was still people using it) and
> > > were able to finally use member template functions for example and
> > > deprecate qObjectFind and such.
> > 
> > This works when there are alternatives. In the case of QNX, *if* this has
> > the side effect of Qt not being able to be built against 6.6.0 (perhaps
> > they will have a newer compiler until then, but I can't assume that), then
> > you need to deprecate the entire platform.
> 
> Yes. The same way we deprecated Mac OSX 10.6 during Qt 5.x lifetime,  or 
> Windows 9x during Qt 4.x lifetime.
> 
> My point is that there is no reason to say that this won't happen in Qt 5.x 
> lifetime.

Which is not ok.

I got your point. But while it is reasonable to push users from
Windows 9x or OS X 10.6, in the case of QNX, you will be pushing users
away from Qt. In the case of QNX 6.5.0, one could even argue that they
could update to 6.6.0 - something that is still not trivial at all. But you
drop 6.6.0, you basically remove Qt from a giant slice of automotive, industrial
and aerospacial markets. Let's bear this in mind before deciding to pull the
plug.

Cheers,
Rafael

> 
> -- 
> Olivier 
> 
> Woboq - Qt services and support - http://woboq.com - http://code.woboq.org
> 

-- 
Rafael Roquetto | rafael.roquetto at kdab.com | Software Engineer
Klarälvdalens Datakonsult AB, a KDAB Group company
Tel. Sweden (HQ) +46-563-540090, USA +1-866-777-KDAB(5322)
KDAB - Qt Experts - Platform-independent software solutions
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