brew tap osx-cross/avr
brew tap PX4/homebrew-px4
brew update
-brew install avr-gcc@7 gcc-arm-none-eabi dfu-programmer avrdude dfu-util python3
-brew link --force avr-gcc@7
+brew install avr-gcc@8 gcc-arm-none-eabi dfu-programmer avrdude dfu-util python3
+brew link --force avr-gcc@8