https://github.com/pavelliavonau/kguitar/commit/0bcc4411a6288c98f4d7fbd9700971caafbc2411 seems we have a port here
Unfortunately, the development of the project seems to be stalled. I don't have much time and/or motivation to continue, and others who have applied over time seem to have lost interest too.
qt5 version
chord.cpp:472: read of uninit memory ?