[Development] Binary incompatible Qt 5 version

[Thiago Macieira]

On Tuesday 21 July 2015 10:38:46 Peter Kuemmel wrote:
> Is it obvious that the Qt 5.4.1 version installed by the system on a KDE
> machine is binary incompatible to a locally compiled Qt 5.5.0?

It shouldn't be. Qt versions are supposed to be binary compatible with each 
other from the point of view of the application.

> That they are binary incompatible is shown by sporadic QtCreator crashes:
> https://bugs.kde.org/show_bug.cgi?id=347524
> https://bugreports.qt.io/browse/QTCREATORBUG-14745
> The crash happens when QBrush objects are passed around by KDE's style
> plugin breeze.so.

Mixing different Qt versions in the same process is not supported. I must point 
out that none of the backtraces in either link show this.

>From what I can tell quickly examining both links, the root cause is not yet 
determined.

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