Andrea / MatN:
About README.arch, now that my brain is working, is NOT a bld_prepare.sh option. It was mostly a "help" file for us here as we would be installing Arch from scratch on different computers. We started out with one of the URL internet lookups on "basic, easy install of Arch". Since it was so basic, what is in README.arch was all of the things we needed to work on building and testing CinGG on that distro.
So, unless there is another package that should be added for installation, I would like to leave it as is. We can add on to the bottom like we did in June of 2020 when Mat provided notes for Manjaro and EndeavourOS. Hopefully this is satisfactory ??