C_FLAGS  = -O2
LINKER  = -Xlinker -Ttext -Xlinker 80100000

####            executable depends on its object files
####            and is created/updated by linking them together

hellorad: hellorad.o pad.o
	gcc $(LINKER) hellorad.o pad.o -o hellorad

####            object file depends on source and header files
####            and is created/updated by compilation

hellorad.o: hellorad.c pad.h
	gcc -c $(C_FLAGS) hellorad.c