[Development] Quick report on loading Qt 5 and 6 in the same process

Thiago Macieira thiago.macieira at intel.com
Tue May 16 21:12:36 CEST 2023

On Monday, 15 May 2023 21:23:21 PDT Thiago Macieira wrote:
> We still don't know why this happened because all our attempts
> to find out why cause the problem to disappear.

BTW, we found that the user's application was linking against 
libKF5NetworkManagerQt, not KF6, because they were using an intermediary 
version of that library, between the addition of the support for Qt 6, but 
before the library renaming. So when the process was launched in production, 
it found the system libKF5NetworkManagerQt and that loaded Qt 5.

Clearly there were more changes than just the QProcess launch and the problem 
disappearing with any environment variable being set. That "launch in 
production" was an important part of the symptom that the reported neglected 
to mention for three days...

Thiago Macieira - thiago.macieira (AT) intel.com
  Cloud Software Architect - Intel DCAI Cloud Engineering
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