obj-m := xr_usb_serial_common.o KERNELDIR ?= /lib/modules/$(shell uname -r)/build PWD := $(shell pwd) EXTRA_CFLAGS := -DDEBUG=0 all: $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install: $(MAKE) -C $(KERNELDIR) M=$(PWD) modules_install clean: rm -rf *.o *~ core .depend .*.cmd *.ko *.mod.c .tmp_versions vtty