# Build Tutorial I8253 refresh counter driver. KERNEL_SOURCE_TREE:=/lib/modules/$(shell uname -r)/build PWD:=$(shell pwd) # specify object. obj-m:=i8253_ref.o .PHONY: modules clean # install modules: make -C $(KERNEL_SOURCE_TREE) M=$(PWD) modules clean: make -C $(KERNEL_SOURCE_TREE) M=$(PWD) clean #install: # make -C $(KERNEL_SOURCE_TREE) M=$(PWD) install