ifneq ($(KERNELRELEASE),)
# 在 mylist 后面添加需要编译的模块数量

mylist=hello.o a.o
# 为每一个模块添加所需的文件

hello-objs := main.o a.o b.o
a-objs:= a.o

obj-m:=$(mylist)

else

#generate the path

CURRENT_PATH:=$(shell pwd)

#the absolute path

LINUX_KERNEL_PATH:=/lib/modules/$(shell uname -r)/build

#complie object

default:

    make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) modules

clean:

    make -C $(LINUX_KERNEL_PATH) M=$(CURRENT_PATH) clean

endif