dir_libk1 := $(patsubst %/,%,$(dir $(abspath $(lastword $(MAKEFILE_LIST)))))

kernel_cflags += -isystem $(dir_libk1) \
                 -DPRINTF_INCLUDE_CONFIG_H=1

c_files += $(dir_libk1)/string.c \
           $(dir_libk1)/printf.c \
           $(dir_libk1)/putchar_.c \
           $(dir_libk1)/bitmap.c

o_files += $(dir_libk1)/string.o \
           $(dir_libk1)/printf.o \
           $(dir_libk1)/putchar_.o \
           $(dir_libk1)/bitmap.o