@geehalel: I can´t stress enough how thankful I am for your help and efforts !
Just posted within the astroberry section of this forum to Kaczorek, the maker of astroberry. Maybe he has some idea, what the problem is.
What makes me curious is, that the compilation of the official branch of libindi did work, apparently. At least I got a working libindi afterwards. Did I understand you correctly, that it is your assumption that the compilation of libindi does not work on the astroberry ? I have the feeling that I missed something, anybody more knowledgeable with linux would automatically do.