Build Errors

The toolchain for the new ATtiny 0-series and 1-series is not up to date in a lot of package repositories. Most of these errors have been fixed upstream, but I have included minimal versions of the patches here.

Fixed with patches/ldscript.patch. Apply this to /usr/avr/lib/ldscripts/avrxmega3.xn. The exact path may be slightly different for you. This patch is from the forums, not upstream.

/usr/avr/include/avr/io.h:583:6: warning: #warning "device type not defined" [-Wcpp]
  583 | #    warning "device type not defined"

Fixed with patches/devdef.patch. Apply this to /usr/avr/include/avr/io.h. The exact path may be slightly different for you.

main.c:115:9: error: 'MCUCR' undeclared (first use in this function)
  115 |         set_sleep_mode(SLEEP_MODE_STANDBY);
      |         ^~~~~~~~~~~~~~

Fixed with patches/sleep.patch. Apply this to /usr/avr/include/avr/sleep.h The exact path may be slightly different for you.