gcc-avr is a different package from the regular gcc: https://packages.debian.org/sid/gcc-avr https://packages.debian.org/sid/gcc-avr https://packages.ubuntu.c

gcc-avr is a different package from the regular gcc: https://packages.debian.org/sid/gcc-avr https://packages.debian.org/sid/gcc-avr https://packages.ubuntu.com/search?suite=kinetic&searchon=names&keywords=gcc-avr https://packages.ubuntu.com/search?suite=kinetic&searchon=na... I don't know why it's an older version, you'll have to ask the Debian people. Maybe there's a reason, but most likely ist's justthat gcc tends to be a difficult piece of software to package and not enough people care/have time to keep the avr version to to date.