This is a fork of the code and examples from "Make: AVR Programming" that I've addapted to work with the Arduino Uno R3 (I'm using the SMD variant, but it shouldn't matter which UNO R3 you're using).
When compiling for UNO R4 WiFi, UNO R3, Nano, or Mega on my MacBook Pro M2, I get an "avr-g++: internal compiler error: Killed: 9 (program cc1plus)" error: FQBN: arduino:avr:nano:cpu=atmega328old ...