[sysadmin/release-tools/frameworks/5.0] /: KF5: auto-increase QT_DISABLE_DEPRECATED_BEFORE when upgrading the min Qt version

[Friedrich W. H. Kossebau]

Am Freitag, 25. Oktober 2019, 00:35:46 CET schrieb David Faure:
> On jeudi 24 octobre 2019 22:24:55 CEST Friedrich W. H. Kossebau wrote:
> > BTW, we want to also set
> > 
> >     -DQT_DEPRECATED_WARNINGS_SINCE=0x060000
> > 
> > otherwise the deprecations done with QT_DEPRECATED_VERSION in Qt's API
> > will
> > not emit warnings, because QT_DEPRECATED_WARNINGS_SINCE defaults to
> > QT_DISABLE_DEPRECATED_BEFORE if set.
> 
> Oh, good to know. Done now for all of KF5.

And the same would need to be done also for the KF variant, i.e. setting
    -DKF_DEPRECATED_WARNINGS_SINCE=0x060000
otherwise the use of KF_DISABLE_DEPRECATED_BEFORE_AND_AT will also result in 
warnings for API deprecated only in newer versions.

Quite some explicit setup. But I made ECMGenerateExportHeader follow what Qt 
does, as consistency rules here IMHO.

Both QT_DEPRECATED_WARNINGS_SINCE & DKF_DEPRECATED_WARNINGS_SINCE could be 
though set via KDEFrameworkCompilerSettings perhaps, that would match what is 
done for -Wzero-as-null-pointer-constant already.

Cheers
Friedrich