ok I gave this another go, from a fresh ubuntu 20 install. I ran everything that @jamshark70 kindly wrote, and it bailed with the error ‘UDEV_INCLUDE_DIR’ documented in this thread so I compiled with this cmake -DCMAKE_BUILD_TYPE=Release -DNATIVE=ON -DSC_HIDAPI=OFF -DSC_EL=no .. and it eventually compiled… but when i try to start scide it says the command is not found. Now, did I kill the ide by making EL=no?
I hope my problems will help someone else too.
EDIT: it works - I had forgotten to read until the end and run make install as sudo. but I still had to catch these errors so there is something here to be shared.