Makefile

# Comment/uncomment the following line to disable/enable debugging
#DEBUG = y

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

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

ifneq ($(KERNELRELEASE),)
# call from kernel build system

obj-m := short.o

else

KERNELDIR ?= /lib/modules/$(shell uname -r)/build
PWD       := $(shell pwd)

default:
 $(MAKE) -C $(KERNELDIR) M=$(PWD) 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