字符设备编译makefile

#AR = ar
ARCH = arm
CC = /opt/gcc-linaro-arm-linux-gnueabihf/bin/arm-linux-gnueabihf-gcc
#DEBFLAGS=-O2
obj-m:=simple.o
KERNELDIR?=/opt/workspace/zz/linux-nand-3.2.0
PWD     :=$(shell pwd)
modules:
        $(MAKE) -C $(KERNELDIR) M=$(PWD) LDDINC=$(PWD)/../include modules
clean:

        rm -rf *.o *.ko

例子2

obj-m:=hello.o
KERNELDIR:=/opt/workspace/zz/linux-nand-3.2.0
PWD:=$(shell pwd)
modules:                                                                                         
        $(MAKE) -C $(KERNELDIR) M=$(PWD) modules
modules_install:
        $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install




clean:
        rm -rf *.o *.ko
~                            

ifneq ($(KERNELRELEASE),) # call from kernel build system scull-objs := main.o pipe.o access.o obj-m   := scull.o else KERNELDIR ?= /lib/modules/$(shell uname -r)/build PWD       := $(shell pwd) modules:         $(MAKE)  -C $(KERNELDIR) M=$(PWD) LDDINC=$(PWD)/../include modules  endif