本帖最后由 vip-weiwei 于 2014-3-25 15:26 编辑

为什么DEBUG = y好像不起作用？必须要加#define SCULL_DEBUG 才编译调试代码，是怎么回事呀？谢谢！

DEBUG = y        


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

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


ARCH=arm
CROSS_COMPILE=arm-none-linux-gnueabi-

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

scull-objs := main.o #pipe.o access.o

obj-m        := scull.o

else

KERNELDIR ?= /home/linux-3.4.1/
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) $(EXTRA_CFLAGS) -M *.c > .depend


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