Could the package avr-gdb, from aur, be moved to community? There are already
many avr-* packages there (like gcc-avr, avr-libc and binutils-avr). I've
talked to djszapi, it seems that it hasn't been moved because he was
maintaining it on aur.
It is currently out-of-date, but removing the patch and changing the version to
7.2 builds a working package.
Ivan Sichmann Freitas
Linux user #509059