Hi, I was attempting to compile FG on a tablet running Chromebook, with internal Linux support enabled. The CPU is Helio P60T, octo, ARM64. When using apt install flightgear, it installs 2018.3.x, resulting in very low framerates. Instead, I went to build version 3.4.0. Following the link
http://wiki.flightgear.org/Building_FlightGear_-_Devuan I failed to compile SimGear. There're tons of errors I am not able to include here, but I did notice a line saying unrecognizable architecture. So this returns to my title: which version is compatible with ARM64?