makefile

Linux设备驱动的经典教材, 该电子书是第三版,并附有全部配套代码.

# Comment/uncomment the following line to disable/enable debugging
#非常标准的Makefile，稍加修改就可以用在很多驱动上
#将这个开关打开，看proc的输出。在这个例子分别有二个用于输出的proc文件。一个是用老方法实现的
#/proc/scullmem
#新方法 /proc/scullseq
DEBUG = y	


# Add your debugging flag (or not) to CFLAGS
ifeq ($(DEBUG),y)
  DEBFLAGS = -O -g -DSCULL_DEBUG # "-O" is needed to expand inlines
else
  DEBFLAGS = -O2
endif

CFLAGS += $(DEBFLAGS)
CFLAGS += -I$(LDDINC)

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



clean:
	rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions

depend .depend dep:
	$(CC) $(CFLAGS) -M *.c > .depend


ifeq (.depend,$(wildcard .depend))
include .depend
endif