#  This program is free software; you can redistribute it and/or
#  modify it under the terms of the GNU General Public License
#  as published by the Free Software Foundation, version 2
#  of the License.
# 
#  This program is distributed in the hope that it will be useful,
#  but WITHOUT ANY WARRANTY; without even the implied warranty of
#  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
#  GNU General Public License for more details.
#
#
# Main targets:
#    all (the default) : make all
#    clean             : clean files
#    extraclean        : clean + clean dependencies
#    install           : install 
#    uninstall         : uninstall 
#
# Notes :
#    - install and uninstall must be made as root
#

ifndef PREFIX
        PREFIX=/usr/local
endif

#SCST_INC_DIR := $(PREFIX)/include/scst
#SCST_DIR := $(SCST_INC_DIR)
SCST_INC_DIR := $(SUBDIRS)/../scst/include
SCST_DIR := $(shell pwd)/../scst/src

EXTRA_CFLAGS += -I$(SCST_INC_DIR)

EXTRA_CFLAGS += -DCONFIG_SCST_EXTRACHECKS 
#EXTRA_CFLAGS += -DCONFIG_SCST_TRACING
EXTRA_CFLAGS += -DCONFIG_SCST_DEBUG
#EXTRA_CFLAGS += -DDEBUG_WORK_IN_THREAD

ifeq ($(KVER),)
  ifeq ($(KDIR),)
    KVER := $(shell uname -r)
    KDIR := /lib/modules/$(KVER)/build
  else
    ifeq ($(KERNELRELEASE),)
      KVER := $(strip $(shell \
	cat $(KDIR)/include/config/kernel.release 2>/dev/null || \
	make -s -C $(KDIR) kernelversion))
    else
      KVER := $(KERNELRELEASE)
    endif
  endif
else
  KDIR := /lib/modules/$(KVER)/build
endif

ifeq ($(INSTALL_MOD_PATH),)
  export INSTALL_MOD_PATH := $(DESTDIR)
endif

INSTALL_DIR := $(INSTALL_MOD_PATH)/lib/modules/$(KVER)/extra
LSI_INC_DIR := $(KDIR)/drivers/message/fusion
EXTRA_CFLAGS += -I$(LSI_INC_DIR)

ifneq ($(PATCHLEVEL),)
obj-m += mpt_scst.o
else
######### BEGIN OUT-OF-TREE RULES #########

all: Modules.symvers Module.symvers
	$(MAKE) -C $(KDIR) SUBDIRS=$(shell pwd) BUILD_INI=m

tgt: Modules.symvers Module.symvers
	$(MAKE) -C $(KDIR) SUBDIRS=$(shell pwd) BUILD_INI=n

install: all
	$(MAKE) -C $(KDIR) SUBDIRS=$(shell pwd) BUILD_INI=m \
		$$([ -n "$(DESTDIR)$(INSTALL_MOD_PATH)" ] && echo DEPMOD=true) \
		modules_install

SCST_MOD_VERS := $(shell ls $(SCST_DIR)/Modules.symvers 2>/dev/null)
ifneq ($(SCST_MOD_VERS),)
Modules.symvers: $(SCST_DIR)/Modules.symvers
	cp $(SCST_DIR)/Modules.symvers .
else
.PHONY: Modules.symvers
endif

# It's renamed in 2.6.18
SCST_MOD_VERS := $(shell ls $(SCST_DIR)/Module.symvers 2>/dev/null)
ifneq ($(SCST_MOD_VERS),)
Module.symvers: $(SCST_DIR)/Module.symvers
	cp $(SCST_DIR)/Module.symvers .
else
.PHONY: Module.symvers
endif

uninstall:
	rm -f $(INSTALL_DIR)/mpt_scst.ko
	-/sbin/depmod -b $(INSTALL_MOD_PATH)/ -a $(KVER)

########## END OUT-OF-TREE RULES ##########
endif

clean:
	rm -f *.o *.ko .*.cmd *.mod.c .*.d .depend *~ Modules.symvers \
		Module.symvers Module.markers modules.order
	rm -rf .tmp_versions

extraclean: clean
	rm -f *.orig *.rej

.PHONY: all tgt install uninstall clean extraclean