Gcc 12.3 (new compiler maybe)

[profezzorn]

See this thread:

Arduino-proffieboard updated to version 4.1

This brings a new compiler which seems to have fewer bugs than the old one, and may also generate slightly more efficient code. There is also a new menu for SPI speed which can largely be ignored. Please note that Arduno 2.x is required to install this. It can still be used with Arduino 1.x, but only after you install it with Arduno 2.x (or manually).