Makefile-via-velocity-only

# check kernel version
KVERS := $(shell uname -r)
KVER  := $(shell uname -r | cut -c1-3)
ifneq ($(KVER), 2.6)
	$(error via-velocity driver for kernel 2.6 only)
endif

KSP := \
/lib/modules/$(KVERS)/build \
/usr/src/linux-$(KVERS) \
/usr/src/linux-$(shell uname -r | sed 's/-.*//') \
/usr/src/kernel-headers-$(KVERS) \
/usr/src/kernel-source-$(KVERS) \
/usr/src/linux-$(KVER) \
/usr/src/linux

test_dir = $(shell [ -e $(dir)/include/linux ] && echo $(dir))
KSP := $(foreach dir, $(KSP), $(test_dir))

KSRC := $(firstword $(KSP))
ifeq (,$(KSRC))
	$(error Linux kernel source not found)
endif

# 2.6 kernel
SRC = via-velocity.c
TARGET = via-velocity.ko
INSTDIR := /lib/modules/$(KVERS)/kernel/drivers/net
BACKUPEXT=$(shell date +%Y-%m-%d-%s)

obj-m += via-velocity.o
via_velocity-objs := via-velocity.o

default:
	make -C $(KSRC) SUBDIRS=$(shell pwd) modules

install: default
	mkdir -p $(INSTDIR)
	@if [ -f $(INSTDIR)/$(TARGET) ] ; then \
		if [ ! -f $(INSTDIR)/$(TARGET).backup ]; then \
			echo "*****  Move official driver $(TARGET) to $(TARGET).$(BACKUPEXT) file" ; \
			BACKUPEXT="backup"; \
		else \
			echo "*****  Move current driver $(TARGET) to $(TARGET).$(BACKUPEXT) file" ; \
			BACKUPEXT=$(BACKUPEXT); \
		fi ; \
		echo "mv $(INSTDIR)/$(TARGET) $(INSTDIR)/$(TARGET).$${BACKUPEXT}";\
		mv $(INSTDIR)/$(TARGET) $(INSTDIR)/$(TARGET).$${BACKUPEXT} ; \
		echo ;\
	fi ;
	install -m 644 -o root $(TARGET) $(INSTDIR)
	/sbin/depmod -a || true

uninstall:
	@if [ -f $(INSTDIR)/$(TARGET).backup ] ; then \
		echo "*****  Restore official driver $(TARGET) from $(INSTDIR)/$(TARGET).backup"; \
		echo "mv $(INSTDIR)/$(TARGET).backup $(INSTDIR)/$(TARGET)";\
		mv -f $(INSTDIR)/$(TARGET).backup $(INSTDIR)/$(TARGET) ;\
	fi
	/sbin/depmod -a

clean:
	-rm -f $(addprefix $(SRC:.c=),.o .ko .mod.c .mod.o) Module.symvers modules.order *~