[Interest] Fwd: Qt 5.4 build error on OS X 10.7

[Thiago Macieira]

On Wednesday 11 February 2015 18:15:51 René J.V. Bertin wrote:
> On Wednesday February 11 2015 08:42:07 Thiago Macieira wrote:
> > On Wednesday 11 February 2015 17:15:37 René J.V. Bertin wrote:
> > > $D/qt-everywhere-opensource-src-5.4.0/qtbase/include/QtCore/../../src/co
> > > reli b/kernel/qmetatype.h:1943:1: error: copying variable of type
> > > 'QBasicAtomicInt' (aka 'QBasicAtomicInteger<int>') invokes deleted
> > > constructor Q_DECLARE_METATYPE_TEMPLATE_2ARG(QPair)
> > > ^~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~~
> > 
> > This is fixed already.
> > 
> > It was a missing digit in qcompilerdetection.h.
> 
> Good to know, could you point me to the fix, please?

d47b9ace50d47a4472dc9fb029bbf6e8dd810c01

    Fix the Apple build version numbers for Clang
    
    A bunch of zeroes were missing. And not to the left.

    Task-number: QTBUG-43279
    Change-Id: I1a710cf572099547b2ade7b2574a7e0a61649758

> And how come it didn't affect my build of the same code (5.4.0 tarball)?
> Exactly because I used a later compiler version?

Exactly. The problem is the detection of the matching Clang compiler version 
for a given Apple-specific build of its Clang. Since we forgot a digit, it 
matched the wrong version and enabled code that triggered a bug in the Clang 
from XCode 4.2.

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