# For building for the current running version of Linux
TARGET		:= $(shell uname -r)
# Or specific version
#TARGET		:= 3.9.4
#TARGET		:= 3.8.13
#TARGET		:= 3.7.10-1.4-desktop
#TARGET		:= 3.4.45
#TARGET		:= 3.0.78

KERNEL_MODULES	:= /lib/modules/$(TARGET)
KERNEL_BUILD	:= $(KERNEL_MODULES)/build
SYSTEM_MAP	:= $(shell if test -r /boot/System.map-$(TARGET) ; then echo /boot/System.map-$(TARGET) ; else echo $(KERNEL_BUILD)/System.map ; fi)

DRIVER := i2c-i801

# Directory below /lib/modules/$(TARGET)/kernel into which to install
# the module:
MOD_SUBDIR = drivers/i2c/busses

obj-m	:= $(DRIVER).o

MAKEFLAGS	+= --no-print-directory
EXTRA_CFLAGS	+= -DDEBUG

.PHONY: all install modules modules_install clean

all: modules

# Targets for running make directly in the external module directory:
modules clean:
	@$(MAKE) -C $(KERNEL_BUILD) M=$(CURDIR) $@

install: modules_install

modules_install:
	test -d $(KERNEL_MODULES)/kernel/$(MOD_SUBDIR) || mkdir $(KERNEL_MODULES)/kernel/$(MOD_SUBDIR)
	cp $(DRIVER).ko $(KERNEL_MODULES)/kernel/$(MOD_SUBDIR)
	depmod -a -F $(SYSTEM_MAP) $(TARGET)