I’ve followed this build process on ubuntu 19.10 using the script posted by @robin.newman 29/2, and revised with the update posted by @robin.newman Mar 1.
I now have a working spi3.2 on ubuntu 19.10 with OSC working. Great work by everyone and thank you all very much.
I am not able to control spi using sonic-pi-tool.py ( python cli for sonic-pi https://github.com/emlyn/sonic-pi-tool which (mostly) works on earlier versions of sonic-pi. I’ve put more information on this posting http://in-thread.sonic-pi.net/t/what-spi-3-2-control-port-to-use-for-cli-tool/3433