[Development] Clarification on Mac 10.6 support for Qt 5.2

Thiago Macieira thiago.macieira at intel.com
Wed Jun 5 05:26:10 CEST 2013

On terça-feira, 4 de junho de 2013 19.32.57, Jake Thomas Petroules wrote:
> Well, Xcode 5.0 will be dropping support for GCC, so the only way to target
> 10.6 or below will be with clang + libstc++.

Right, I missed that clang + libstdc++ was still possible with -no-c++11. It's 
a non-default option.

I guess we conclude then:
 a) we can keep support for 10.6 for the time being, with macx-clang
 b) we should deprecate macx-g++, since XCode 5.0 will not have that anymore

> 10.5 came out in 2007 and was dropped by Qt in 2012. 10.6 came out in 2009
> so let's drop 10.6 somewhere around 2015 or even 2016 (I add a year because
> of its higher market share). We should have 10.11 by then.

I'm not sure I like that idea. We've always kept support for the past 3 
versions of Mac OS X. Until 10.9 now, that meant roughly 6 years of support 
from us. If we keep that rate, we should support 10.6 at least until June 

So, if we keep current practice, Qt 5.3 or 5.4 will drop support for it 
anyway. That's 2014, not 2015 or 2016.

Also, please note we're talking about software that switches to Qt 5.2. That 
is, we're talking about software released in 2014. And people keep telling me 
that they can't upgrade Qt after a cycle started.

Thiago Macieira - thiago.macieira (AT) intel.com
  Software Architect - Intel Open Source Technology Center
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