KERNEL_SRC ?= /lib/modules/$(shell uname -r)/build M ?= $(shell pwd) M=$(PWD) BT_ROOT=$(KERNEL_SRC)/$(M) KBUILD_OPTIONS+= BT_ROOT=$(BT_ROOT) all: $(MAKE) -C $(KERNEL_SRC) M=$(M) modules $(KBUILD_OPTIONS) modules_install: $(MAKE) INSTALL_MOD_STRIP=1 -C $(KERNEL_SRC) M=$(M) modules_install clean: $(MAKE) -C $(KERNEL_SRC) M=$(M) clean