Linux kernel module makefile

Makefile

ifeq ($(KERNELRELEASE),)

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

modules:
        $(MAKE) -C $(KERNELDIR) M=$(PWD) modules EXTRA_CFLAGS="-g -DDEBUG"

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

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

.PHONY: modules modules_install clean

else
        # called from kernel build system: just declare what our modules are
        obj-m := netdev.o
endif