/mnt/hdc1/gary/projects/avr-toolchain/avr1/bin/avr-gcc -g -Wall -O2 -mmcu=attiny15 -Wa,-gstabs -c -o main.o main.c main.c:1: error: MCU 'attiny15' supported for assembler only In file included from /mnt/hdc1/gary/projects/avr-toolchain/avr1/bin/../lib/gcc/avr/4.2.0/../../../../avr/include/avr/io.h:280, from main.c:25: /mnt/hdc1/gary/projects/avr-toolchain/avr1/bin/../lib/gcc/avr/4.2.0/../../../../avr/include/avr/iotn15.h:51:4: warning: #warning "MCU not supported by the C compiler" main.c:36: warning: return type of 'main' is not 'int' make: *** [main.o] Error 1