[Releasing] Meeting minutes: Qt release team meeting 12.01.2016

[Thiago Macieira]

On Thursday 14 January 2016 18:24:46 Knoll Lars wrote:
> >I'd rather apply the fix instead.
> 
> 
> Well, this works in 5.6, I guess because we're not using std::atomic there.
> Why aren't we continuing to use that code path until QNX has released a
> fixed tool chain?
 
Because it's the old atomic code, some of which I rewrote for 5.0, most of 
which are the same ones Brad made public for 4.4, with the initial 
implementations from 4.0.

There are problems with them, as evidenced by the bug reports received in the 
last year. Some are serious problems, like the 32-bit ARM code for 64-bit 
integers. And I think that the AArch64 codepath is just completely busted -- 
unless Q_COMPILER_ATOMICS is defined, in which case we are back where we 
started.

I don't test non-IA and, most importantly, I don't want to maintain the hand-
written assembly anymore.

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