Thank you for the replies.

The kit will point to the default Qt sources. How can I make the kit point to the my own downloaded qt sources (/home/qt-everywhere-enterprise-src-5.4.0)?

I have already tried /home/qt-everywhere-enterprise-src-5.4.0/qbase/src, it does not work.

What I want is to step inside the Qt sources itself (eventually obtain a backtrace or callstack).

Mut.