ifneq ($(KERNELRELEASE),)
obj-m := hello.o

else
PWD   := $(shell pwd)
KDIR  := ~/buildroot-2011.08/output/build/linux-3.1/

default:
         $(MAKE) -C $(KDIR) M=$(PWD) modules
endif

clean:
        rm -rf *.ko *.o *.mod.c *.mod.o modules.order
        rm -rf Module.symvers .*.cmd .tmp_versions