/home/gary/projects/avr-toolchain/avr/bin/avr-gcc -g -Wall -O2 -mmcu=avr6 -D __COMPILING_AVR_LIBC__ -Wa,-gstabs   -c -o main.o main.c
main.c:36: warning: return type of 'main' is not 'int'
main.c: In function 'main':
main.c:44: error: 'DDRB' undeclared (first use in this function)
main.c:44: error: (Each undeclared identifier is reported only once
main.c:44: error: for each function it appears in.)
main.c:46: error: 'PORTB' undeclared (first use in this function)
make: *** [main.o] Error 1