Note

An exploded source tree is not required to build kernel modules against the currently in-use kernel.

For example, to build the foo.ko module, create the following file (named Makefile) in the directory containing the foo.c file:


obj-m    := foo.o

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

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