[Development] Two source incompatibilities in Qt 5.5 with Clang

Thiago Macieira thiago.macieira at intel.com
Fri Mar 13 20:41:32 CET 2015

On Friday 13 March 2015 18:02:51 Olivier Goffart wrote:
> On Friday 13 March 2015 09:08:35 Thiago Macieira wrote:
> > It's a minor SIC and I still call it justified. Anyone who was using
> > #ifndef was making assumptions about Q_ASSERT's internals and how it is
> > declared. We should all agree that making assumptions is a bad idea.
> It was documented:
> http://doc.qt.io/qt-5/qtglobal.html#Q_ASSERT
> "It does nothing if QT_NO_DEBUG was defined during compilation."

Missing: unless QT_FORCE_ASSERTS is also defined.

> And judging from the unused warning compiler gives, they were in their
> rights to do it, I'd say.

> Which can still be done in one line.
> But we don't even need to do it. We can leave the old one as it, and use
> Q_ASSERT_UNUSED for the new asserts

Before we discuss the name, we have to discuss doing a 10k-line change to 1884 
files in Qt.

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

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