/mnt/hdc1/gary/projects/avr-toolchain/avr1/bin/avr-gcc -g -Wall -O2 -mmcu=avr6  -Wa,-gstabs   -c -o main.o main.c
In file included from main.c:1:
/mnt/hdc1/gary/projects/avr-toolchain/avr1/bin/../lib/gcc/avr/4.2.0/../../../../avr/include/avr/io.h:287:6: warning: #warning "device type not defined"
main.c:3: warning: return type defaults to 'int'
main.c: In function 'main':
main.c:7: warning: control reaches end of non-void function
/mnt/hdc1/gary/projects/avr-toolchain/avr1/bin/avr-gcc -g -Wall -O2 -mmcu=avr6  -Wa,-gstabs -Wl,-Map,main.map -o main.elf main.o 
main.o: In function `main':
/mnt/hdc1/gary/projects/avr-toolchain/test/html/obj/avr6/simple/main.c:3: undefined reference to `__stack'
/mnt/hdc1/gary/projects/avr-toolchain/test/html/obj/avr6/simple/main.c:3: undefined reference to `__stack'
make: *** [main.elf] Error 1