[Development] How can Qt 5.6.0 MinGW pass in CI with QTBUG-49971 open?

[Roland Winklmeier]

2016-03-03 9:14 GMT+01:00 Thiago Macieira <thiago.macieira at intel.com>:

> On quinta-feira, 3 de março de 2016 00:06:41 PST Thiago Macieira wrote:
> > On quinta-feira, 3 de março de 2016 08:56:35 PST Roland Winklmeier wrote:
> > > So how is it possible that this error does not show up in CI? I did
> > > download the Qt MinGW 4.9 version, so CI should fail to build.
> >
> > -Wundef is not enabled by either -Wall or -Wextra. It's entirely correct
> C
> > source to #if on undefined tokens: they become zeroes.
> >
> > -Werror is never enabled to end-users either, so QTBUG-49971 is not a
> real
> > FTBFS.
>
> But -Wundef and -Werror are part of our headersclean target. So you have a
> point: how is the CI building this?
>

No matter if I download the source from download.qt.io or clone from git
and run the normal build as configured in CI, I get the build error. I'm
not changing any flags. So my and CI configuration should be exactly the
same and either both pass or fail. But CI passes and the build of several
people locally fail. I wonder how thats possible.
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