For some reason the error massage did not occur today. Apparently it was caused by an obsolete openstreet lib. I have compiled dt 2.3.0
I got into another problem, however: unlike the windows version my linux dt does not recognise my D7500. What do I have to do in order to get it working? I can see online on git, that it must be the rawspeed from the develop branch, but how do I get this branch considered during build?