Manjaro ARM for Rock5B

well not sure I’ll be able to dedicate time for now as it will probably require efforts before making it work
might give a try when having more free time this week-end.

also from forums topic I post before, some one provided this build instruction:

Grab the ubuntu kernel, and replace the one in multi-platform tarball (make sure to remove the package with pacman), and you will have archlinux arm on your device.

a bit vague, but someone may know what it means