Just a quick post to let you know that you’ll need a new wiringPi for the Raspberry Pi 4B.
cd /tmp wget https://project-downloads.drogon.net/wiringpi-latest.deb sudo dpkg -i wiringpi-latest.deb
and make sure it’s version 2.52. I’ll push the updated sources shortly.
It will hopefully be part of the official release soon, but for now this will do.