#
# Makefile for out-of-tree build of MARS module
#
#
# By Benjamin Kübler <benjamin.kuebler@1und1.de>
#
# usage make [ KDIR =/path/to/kernel/source ]
#
obj-$(CONFIG_MARS)	+= mars.o

mars-objs :=				\
	lamport.o			\
	brick_say.o			\
	brick_mem.o			\
	brick.o				\
	mars_generic.o			\
	lib_log.o			\
	lib_rank.o			\
	lib_limiter.o			\
	lib_timing.o			\
	lib_mapfree.o			\
	mars_net.o			\
	mars_server.o			\
	mars_client.o			\
	mars_aio.o			\
	mars_sio.o			\
	mars_bio.o			\
	mars_if.o			\
	mars_copy.o			\
	mars_trans_logger.o		\
	sy_old/sy_generic.o		\
	sy_old/sy_net.o			\
	sy_old/mars_proc.o		\
	sy_old/mars_main.o

ifneq ($(KERNELRELEASE),)

# in-tree-build process
include Kbuild

else
# out-of-tree-build process

MARSSRC := $(shell pwd)
DESTDIR ?= /
KDIR ?= /lib/modules/$(shell uname -r)/build

.PHONY: greeting install default clean config

default: mars_config.h
	$(MAKE) -C $(KDIR) M=$(PWD) modules

greeting:
	@echo "Building MARS Module again: KDIR=$(KDIR)" ;
	@if ! test -e $(KDIR)/Makefile ; then \
		echo -e "Sorry, kernel makefile not found. You need to tell me a correct KDIR!\n" ; \
		false; \
	fi

clean:
	$(MAKE) -C $(KDIR) M=$(PWD) clean

config:
	$(MAKE) -C $(KDIR) M=$(PWD) config

install:
	$(MAKE) -C $(KDIR) M=$(PWD) modules_install

extra-y	:= buildtag.h
buildtag.h:
	exec > $@;\
	/bin/echo -e "/* Automatically generated -- DO NOT EDIT! */";\
	if [ "$$MARSVERSION" != "" ]; then \
		BUILDTAG="$$MARSVERSION"; \
	elif git describe --tags >/dev/null 2>&1; then \
		BUILDTAG="$$(git describe --tags)"; \
	elif [ -e DISTVERSION ]; then \
		BUILDTAG=$$(cat DISTVERSION); \
	else \
		BUILDTAG="no-buildtag-available"; \
	fi; \
	/bin/echo -e "#define BUILDTAG  \"$$BUILDTAG\"";\
	/bin/echo -e "#define BUILDHOST \"$$USER@`hostname`\"";\
	/bin/echo -e "#define BUILDDATE \"$$(date '+%F %T')\""
	cat $@;

extra-y	+= mars_config.h
GEN_CONFIG_SCRIPT := $(MARSSRC)/gen_config.pl
mars_config.h: buildtag.h
	if [ ! -x $(GEN_CONFIG_SCRIPT) ]; then \
	    $(kecho) "MARS: cannot execute script $(GEN_CONFIG_SCRIPT)"; \
	    /bin/false; \
	fi; \
	cat $(MARSSRC)/Kconfig | $(GEN_CONFIG_SCRIPT) 2>/dev/null > $@;
	cat $@;

endif