printf.o: printf.c \
   /root/toykernel/include/toykernel/printf.h
string.o: string.c \
   /root/toykernel/include/toykernel/types.h \
   /root/toykernel/include/toykernel/string.h \
   /root/toykernel/include/toykernel/ctype.h
vsprintf.o: vsprintf.c \
   /root/toykernel/include/toykernel/types.h \
   /root/toykernel/include/toykernel/string.h \
   /root/toykernel/include/toykernel/ctype.h \
   /root/toykernel/include/toykernel/kernel.h \
   /root/toykernel/include/arch/div64.h
