avr-gcc cannot find device-specific libraries when compiling, which from my reading is due to a problem with multilib. However, avr-gcc@4 works fine!
avr-gcc -O2 -DF_CPU=16000000UL -mmcu=atmega32u4 test.c -o test avr-ld: cannot find -lm avr-ld: cannot find -lc avr-ld: cannot find -latmega32u4 collect2: error: ld returned 1 exit status The libraries in question here are located within /gnu/store/...-avr-libc-2.0.0/avr/lib/avr5 but avr-gcc is only searching within /avr/lib. For now, I'm just using avr-gcc@4 and moving on with life. - Dave
