#
# Copyright (C) 2006-2010 OpenWrt.org
#
# This is free software, licensed under the GNU General Public License v2.
# See /LICENSE for more information.
#

override TARGET_BUILD=
include $(INCLUDE_DIR)/prereq.mk
include $(INCLUDE_DIR)/kernel.mk
include $(INCLUDE_DIR)/host.mk
include $(INCLUDE_DIR)/version.mk

override MAKE:=$(_SINGLE)$(SUBMAKE)
override NO_TRACE_MAKE:=$(_SINGLE)$(NO_TRACE_MAKE)

KDIR=$(KERNEL_BUILD_DIR)
KDIR_TMP=$(KDIR)/tmp
DTS_DIR:=$(LINUX_DIR)/arch/$(LINUX_KARCH)/boot/dts

sanitize = $(call tolower,$(subst _,-,$(1)))

DIST_SANITIZED:=$(call sanitize,$(VERSION_DIST))
EXTRA_NAME_SANITIZED=$(call sanitize,$(EXTRA_IMAGE_NAME))

IMG_PREFIX:=$(DIST_SANITIZED)-$(if $(CONFIG_VERSION_FILENAMES),$(VERSION_NUMBER)-)$(if $(EXTRA_NAME_SANITIZED),$(EXTRA_NAME_SANITIZED)-)$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))

MKFS_DEVTABLE_OPT := -D $(INCLUDE_DIR)/device_table.txt

ifneq ($(CONFIG_BIG_ENDIAN),)
  JFFS2OPTS     :=  --big-endian --squash-uids -v
else
  JFFS2OPTS     :=  --little-endian --squash-uids -v
endif

ifeq ($(CONFIG_JFFS2_RTIME),y)
  JFFS2OPTS += -X rtime
endif
ifeq ($(CONFIG_JFFS2_ZLIB),y)
  JFFS2OPTS += -X zlib
endif
ifeq ($(CONFIG_JFFS2_LZMA),y)
  JFFS2OPTS += -X lzma --compression-mode=size
endif
ifneq ($(CONFIG_JFFS2_RTIME),y)
  JFFS2OPTS += -x rtime
endif
ifneq ($(CONFIG_JFFS2_ZLIB),y)
  JFFS2OPTS += -x zlib
endif
ifneq ($(CONFIG_JFFS2_LZMA),y)
  JFFS2OPTS += -x lzma
endif

JFFS2OPTS += $(MKFS_DEVTABLE_OPT)

SQUASHFS_BLOCKSIZE := $(CONFIG_TARGET_SQUASHFS_BLOCK_SIZE)k
SQUASHFSOPT := -b $(SQUASHFS_BLOCKSIZE)
SQUASHFSOPT += -p '/dev d 755 0 0' -p '/dev/console c 600 0 0 5 1'
SQUASHFSCOMP := gzip
LZMA_XZ_OPTIONS := -Xpreset 9 -Xe -Xlc 0 -Xlp 2 -Xpb 2
ifeq ($(CONFIG_SQUASHFS_LZMA),y)
  SQUASHFSCOMP := lzma $(LZMA_XZ_OPTIONS)
endif
ifeq ($(CONFIG_SQUASHFS_XZ),y)
  ifneq ($(filter arm x86 powerpc sparc,$(LINUX_KARCH)),)
    BCJ_FILTER:=-Xbcj $(LINUX_KARCH)
  endif
  SQUASHFSCOMP := xz $(LZMA_XZ_OPTIONS) $(BCJ_FILTER)
endif

JFFS2_BLOCKSIZE ?= 64k 128k

fs-types-$(CONFIG_TARGET_ROOTFS_SQUASHFS) += squashfs
fs-types-$(CONFIG_TARGET_ROOTFS_JFFS2) += $(addprefix jffs2-,$(JFFS2_BLOCKSIZE))
fs-types-$(CONFIG_TARGET_ROOTFS_JFFS2_NAND) += $(addprefix jffs2-nand-,$(NAND_BLOCKSIZE))
fs-types-$(CONFIG_TARGET_ROOTFS_EXT4FS) += ext4
fs-types-$(CONFIG_TARGET_ROOTFS_ISO) += iso
fs-subtypes-$(CONFIG_TARGET_ROOTFS_JFFS2) += $(addsuffix -raw,$(addprefix jffs2-,$(JFFS2_BLOCKSIZE)))
fs-subtypes-$(CONFIG_TARGET_ROOTFS_CPIOGZ) += cpiogz
fs-subtypes-$(CONFIG_TARGET_ROOTFS_TARGZ) += targz

TARGET_FILESYSTEMS := $(fs-types-y)

FS_64K := $(filter-out jffs2-%,$(TARGET_FILESYSTEMS)) jffs2-64k
FS_128K := $(filter-out jffs2-%,$(TARGET_FILESYSTEMS)) jffs2-128k
FS_256K := $(filter-out jffs2-%,$(TARGET_FILESYSTEMS)) jffs2-256k

define add_jffs2_mark
	echo -ne '\xde\xad\xc0\xde' >> $(1)
endef

PROFILE_SANITIZED := $(call sanitize,$(PROFILE))

define split_args
$(foreach data, \
	$(subst |,$(space),\
		$(subst $(space),^,$(1))), \
	$(call $(2),$(strip $(subst ^,$(space),$(data)))))
endef

define build_cmd
$(if $(Build/$(word 1,$(1))),,$(error Missing Build/$(word 1,$(1))))
$(call Build/$(word 1,$(1)),$(wordlist 2,$(words $(1)),$(1)))

endef

define concat_cmd
$(call split_args,$(1),build_cmd)
endef

# pad to 4k, 8k, 16k, 64k, 128k, 256k and add jffs2 end-of-filesystem mark
define prepare_generic_squashfs
	$(STAGING_DIR_HOST)/bin/padjffs2 $(1) 4 8 16 64 128 256
endef

define Image/BuildKernel/Initramfs
	$(call Image/Build/Initramfs)
endef

define Image/BuildKernel/MkuImage
	mkimage -A $(ARCH) -O linux -T kernel -C $(1) -a $(2) -e $(3) \
		-n '$(call toupper,$(ARCH)) OpenWrt Linux-$(LINUX_VERSION)' -d $(4) $(5)
endef

define Image/BuildKernel/MkFIT
	$(TOPDIR)/scripts/mkits.sh \
		-D $(1) -o $(KDIR)/fit-$(1).its -k $(2) $(if $(3),-d $(3)) -C $(4) -a $(5) -e $(6) \
		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $(KDIR)/fit-$(1).its $(KDIR)/fit-$(1)$(7).itb
endef

# $(1) source dts file
# $(2) target dtb file
# $(3) extra CPP flags
# $(4) extra DTC flags
define Image/BuildDTB
	$(TARGET_CROSS)cpp -nostdinc -x assembler-with-cpp \
		-I$(DTS_DIR) \
		-I$(DTS_DIR)/include \
		-undef -D__DTS__ $(3) \
		-o $(2).tmp $(1)
	$(LINUX_DIR)/scripts/dtc/dtc -O dtb \
		-i$(dir $(1)) $(4) \
		-o $(2) $(2).tmp
	$(RM) $(2).tmp
endef

define Image/mkfs/jffs2/sub
		$(STAGING_DIR_HOST)/bin/mkfs.jffs2 $(3) --pad -e $(patsubst %k,%KiB,$(1)) -o $(KDIR)/root.jffs2-$(2) -d $(TARGET_DIR) -v 2>&1 1>/dev/null | awk '/^.+$$$$/'
		$(call add_jffs2_mark,$(KDIR)/root.jffs2-$(2))
endef

define Image/mkfs/jffs2/sub-raw
		$(STAGING_DIR_HOST)/bin/mkfs.jffs2 $(3) -e $(patsubst %k,%KiB,$(1)) -o $(KDIR)/root.jffs2-$(2)-raw -d $(TARGET_DIR) -v 2>&1 1>/dev/null | awk '/^.+$$$$/'
endef

define Image/mkfs/jffs2/template
  Image/mkfs/jffs2-$(1) = $$(call Image/mkfs/jffs2/sub,$(1),$(1),$(JFFS2OPTS))
  Image/mkfs/jffs2-$(1)-raw = $$(call Image/mkfs/jffs2/sub-raw,$(1),$(1),$(JFFS2OPTS))

endef

define Image/mkfs/jffs2-nand/template
  Image/mkfs/jffs2-nand-$(1) = \
	$$(call Image/mkfs/jffs2/sub, \
		$(word 2,$(subst -, ,$(1))),nand-$(1), \
			$(JFFS2OPTS) --no-cleanmarkers --pagesize=$(word 1,$(subst -, ,$(1))))

endef

$(eval $(foreach S,$(JFFS2_BLOCKSIZE),$(call Image/mkfs/jffs2/template,$(S))))
$(eval $(foreach S,$(NAND_BLOCKSIZE),$(call Image/mkfs/jffs2-nand/template,$(S))))

define Image/mkfs/squashfs
	$(STAGING_DIR_HOST)/bin/mksquashfs4 $(TARGET_DIR) $(KDIR)/root.squashfs -nopad -noappend -root-owned -comp $(SQUASHFSCOMP) $(SQUASHFSOPT) -processors $(if $(CONFIG_PKG_BUILD_JOBS),$(CONFIG_PKG_BUILD_JOBS),1) $(if $(SOURCE_DATE_EPOCH),-fixed-time $(SOURCE_DATE_EPOCH))
endef

# $(1): board name
# $(2): rootfs type
# $(3): kernel image
ifneq ($(CONFIG_NAND_SUPPORT),)
   define Image/Build/SysupgradeNAND
	mkdir -p "$(KDIR_TMP)/sysupgrade-$(1)/"
	echo "BOARD=$(1)" > "$(KDIR_TMP)/sysupgrade-$(1)/CONTROL"
	[ -z "$(2)" ] || $(CP) "$(KDIR)/root.$(2)" "$(KDIR_TMP)/sysupgrade-$(1)/root"
	[ -z "$(3)" ] || $(CP) "$(3)" "$(KDIR_TMP)/sysupgrade-$(1)/kernel"
	(cd "$(KDIR_TMP)"; $(TAR) cvf \
		"$(BIN_DIR)/$(IMG_PREFIX)-$(1)-$(2)-sysupgrade.tar" sysupgrade-$(1) \
			$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
	)
   endef

# $(1) board name
# $(2) ubinize-image options (e.g. --uboot-env and/or --kernel kernelimage)
# $(3) rootfstype (e.g. squashfs or ubifs)
# $(4) options to pass-through to ubinize (i.e. $($(PROFILE)_UBI_OPTS)))
   define Image/Build/UbinizeImage
	sh $(TOPDIR)/scripts/ubinize-image.sh $(2) \
		"$(KDIR)/root.$(3)" \
		"$(KDIR)/$(IMG_PREFIX)-$(1)-$(3)-ubinized.bin" \
		$(4)
   endef

endif

ifneq ($(CONFIG_TARGET_ROOTFS_UBIFS),)
    define Image/mkfs/ubifs/generate
	$(CP) ./ubinize$(1).cfg $(KDIR)
	( cd $(KDIR); \
		$(STAGING_DIR_HOST)/bin/ubinize \
		$(if $($(PROFILE)_UBI_OPTS), \
			$(shell echo $($(PROFILE)_UBI_OPTS)), \
			$(shell echo $(UBI_OPTS)) \
		) \
		-o $(KDIR)/root$(1).ubi \
		ubinize$(1).cfg \
	)
    endef

    define Image/mkfs/ubifs

        ifneq ($($(PROFILE)_UBIFS_OPTS)$(UBIFS_OPTS),)
		$(STAGING_DIR_HOST)/bin/mkfs.ubifs \
			$(if $($(PROFILE)_UBIFS_OPTS), \
				$(shell echo $($(PROFILE)_UBIFS_OPTS)), \
				$(shell echo $(UBIFS_OPTS)) \
			) \
			$(if $(CONFIG_TARGET_UBIFS_FREE_SPACE_FIXUP),--space-fixup) \
			$(if $(CONFIG_TARGET_UBIFS_COMPRESSION_NONE),--force-compr=none) \
			$(if $(CONFIG_TARGET_UBIFS_COMPRESSION_LZO),--force-compr=lzo) \
			$(if $(CONFIG_TARGET_UBIFS_COMPRESSION_ZLIB),--force-compr=zlib) \
			$(if $(shell echo $(CONFIG_TARGET_UBIFS_JOURNAL_SIZE)),--jrn-size=$(CONFIG_TARGET_UBIFS_JOURNAL_SIZE)) \
			--squash-uids \
			-o $(KDIR)/root.ubifs \
			-d $(TARGET_DIR)
        endif
	$(call Image/Build,ubifs)

        ifneq ($($(PROFILE)_UBI_OPTS)$(UBI_OPTS),)
		$(if $(wildcard ./ubinize.cfg),$(call Image/mkfs/ubifs/generate,))
		$(if $(wildcard ./ubinize-overlay.cfg),$(call Image/mkfs/ubifs/generate,-overlay))
        endif
	$(if $(wildcard ./ubinize.cfg),$(call Image/Build,ubi))
    endef
endif

define Image/mkfs/cpiogz
	( cd $(TARGET_DIR); find . | cpio -o -H newc | gzip -9n >$(BIN_DIR)/$(IMG_PREFIX)-rootfs.cpio.gz )
endef

define Image/mkfs/targz
	$(TAR) -cp --numeric-owner --owner=0 --group=0 --sort=name \
		$(if $(SOURCE_DATE_EPOCH),--mtime="@$(SOURCE_DATE_EPOCH)") \
		-C $(TARGET_DIR)/ . | gzip -9n > $(BIN_DIR)/$(IMG_PREFIX)$(if $(PROFILE_SANITIZED),-$(PROFILE_SANITIZED))-rootfs.tar.gz
endef

E2SIZE=$(shell echo $$(($(CONFIG_TARGET_ROOTFS_PARTSIZE)*1024*1024)))

define Image/mkfs/ext4
	$(STAGING_DIR_HOST)/bin/make_ext4fs \
		-l $(E2SIZE) -b $(CONFIG_TARGET_EXT4_BLOCKSIZE) \
		-i $(CONFIG_TARGET_EXT4_MAXINODE) \
		-m $(CONFIG_TARGET_EXT4_RESERVED_PCT) \
		$(if $(CONFIG_TARGET_EXT4_JOURNAL),,-J) \
		$(if $(SOURCE_DATE_EPOCH),-T $(SOURCE_DATE_EPOCH)) \
		$(KDIR)/root.ext4 $(TARGET_DIR)/
endef

define Image/mkfs/prepare/default
	# Use symbolic permissions to avoid clobbering SUID/SGID/sticky bits
	- $(FIND) $(TARGET_DIR) -type f -not -perm /0100 -not -name 'ssh_host*' -not -name 'shadow' -print0 | $(XARGS) -0 chmod u+rw,g+r,o+r
	- $(FIND) $(TARGET_DIR) -type f -perm /0100 -print0 | $(XARGS) -0 chmod u+rwx,g+rx,o+rx
	- $(FIND) $(TARGET_DIR) -type d -print0 | $(XARGS) -0 chmod u+rwx,g+rx,o+rx
	$(INSTALL_DIR) $(TARGET_DIR)/tmp $(TARGET_DIR)/overlay
	chmod 1777 $(TARGET_DIR)/tmp
endef

define Image/mkfs/prepare
	$(call Image/mkfs/prepare/default)
endef


define Image/Checksum
	( cd ${BIN_DIR} ; \
		$(FIND) -maxdepth 1 -type f \! -name 'md5sums'  -printf "%P\n" | sort | xargs $1 > $2 \
	)
endef

define BuildImage/mkfs
  install: mkfs-$(1)
  .PHONY: mkfs-$(1)
  mkfs-$(1): kernel_prepare
	$(Image/mkfs/$(1))
	$(call Build/mkfs/default,$(1))
	$(call Build/mkfs/$(1),$(1))
  $(KDIR)/root.$(1): mkfs-$(1)

endef

# Build commands that can be called from Device/* templates
define Build/uImage
	mkimage -A $(LINUX_KARCH) \
		-O linux -T kernel \
		-C $(1) -a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
		-n '$(call toupper,$(LINUX_KARCH)) OpenWrt Linux-$(LINUX_VERSION)' -d $@ $@.new
	@mv $@.new $@
endef

define Build/netgear-chk
	$(STAGING_DIR_HOST)/bin/mkchkimg \
		-o $@.new \
		-k $@ \
		-b $(NETGEAR_BOARD_ID) \
		-r $(NETGEAR_REGION)
	mv $@.new $@
endef

define Build/netgear-dni
	$(STAGING_DIR_HOST)/bin/mkdniimg \
		-B $(NETGEAR_BOARD_ID) -v OpenWrt.$(REVISION) \
		$(if $(NETGEAR_HW_ID),-H $(NETGEAR_HW_ID)) \
		-r "$(1)" \
		-i $@ -o $@.new
	mv $@.new $@
endef

define Build/tplink-safeloader
       -$(STAGING_DIR_HOST)/bin/tplink-safeloader \
		-B $(TPLINK_BOARD_NAME) \
		-V $(REVISION) \
		-k $(word 1,$^) \
		-r $@ \
		-o $@.new \
		-j \
		$(wordlist 2,$(words $(1)),$(1)) \
		$(if $(findstring sysupgrade,$(word 1,$(1))),-S) && mv $@.new $@ || rm -f $@
endef

define Build/fit
	$(TOPDIR)/scripts/mkits.sh \
		-D $(DEVICE_NAME) -o $@.its -k $@ \
		$(if $(word 2,$(1)),-d $(word 2,$(1))) -C $(word 1,$(1)) \
		-a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
		-A $(LINUX_KARCH) -v $(LINUX_VERSION)
	PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
	@mv $@.new $@
endef

define Build/lzma
	$(call Build/lzma-no-dict,-lc1 -lp2 -pb2 $(1))
endef

define Build/lzma-no-dict
	$(STAGING_DIR_HOST)/bin/lzma e $@ $(1) $@.new
	@mv $@.new $@
endef

define Build/gzip
	gzip -9n -c $@ $(1) > $@.new
	@mv $@.new $@
endef

define Build/jffs2
	rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 && \
		mkdir -p $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$$(dirname $(1)) && \
		cp $@ $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$(1) && \
		$(STAGING_DIR_HOST)/bin/mkfs.jffs2 --pad \
			$(if $(CONFIG_BIG_ENDIAN),--big-endian,--little-endian) \
			--squash-uids -v -e $(patsubst %k,%KiB,$(BLOCKSIZE)) \
			-o $@.new \
			-d $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 \
			2>&1 1>/dev/null | awk '/^.+$$$$/' && \
		$(STAGING_DIR_HOST)/bin/padjffs2 $@.new -J $(patsubst %k,,$(BLOCKSIZE))
	-rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/
	@mv $@.new $@
endef

define Build/kernel-bin
	rm -f $@
	cp $< $@
endef

define Build/patch-cmdline
	$(STAGING_DIR_HOST)/bin/patch-cmdline $@ '$(CMDLINE)'
endef

define Build/append-kernel
	dd if=$(word 1,$^) $(if $(1),bs=$(1) conv=sync) >> $@
endef

define Build/append-rootfs
	dd if=$(word 2,$^) $(if $(1),bs=$(1) conv=sync) >> $@
endef

define Build/append-ubi
	sh $(TOPDIR)/scripts/ubinize-image.sh \
		$(if $(UBOOTENV_IN_UBI),--uboot-env) \
		$(if $(KERNEL_IN_UBI),--kernel $(word 1,$^)) \
		$(word 2,$^) \
		$@.tmp \
		-p $(BLOCKSIZE) -m $(PAGESIZE) -E 5 \
		$(if $(SUBPAGESIZE),-s $(SUBPAGESIZE))
	cat $@.tmp >> $@
	rm $@.tmp
endef

define Build/pad-to
	dd if=$@ of=$@.new bs=$(1) conv=sync
	mv $@.new $@
endef

define Build/pad-rootfs
	$(call prepare_generic_squashfs,$@ $(1))
endef

define Build/pad-offset
	let \
		size="$$(stat -c%s $@)" \
		pad="$(word 1, $(1))" \
		offset="$(word 2, $(1))" \
		pad="(pad - ((size + offset) % pad)) % pad" \
		newsize='size + pad'; \
		dd if=$@ of=$@.new bs=$$newsize count=1 conv=sync
	mv $@.new $@
endef

define Build/check-size
	@[ $$(($(subst k,* 1024,$(subst m, * 1024k,$(1))))) -ge "$$(stat -c%s $@)" ] || { \
		echo "WARNING: Image file $@ is too big" >&2; \
		rm -f $@; \
	}
endef

define Build/combined-image
	-sh $(TOPDIR)/scripts/combined-image.sh \
		"$(word 1,$^)" \
		"$@" \
		"$@.new"
	@mv $@.new $@
endef

define Build/sysupgrade-nand
	sh $(TOPDIR)/scripts/sysupgrade-nand.sh \
		--board $(if $(BOARD_NAME),$(BOARD_NAME),$(DEVICE_NAME)) \
		--kernel $(word 1,$^) \
		--rootfs $(word 2,$^) \
		$@
endef

define Device/Init
  PROFILES := $(PROFILE)
  DEVICE_NAME := $(1)
  KERNEL:=
  KERNEL_INITRAMFS = $$(KERNEL)
  KERNEL_SIZE:=
  CMDLINE:=

  IMAGE_PREFIX := $(IMG_PREFIX)-$(1)
  IMAGE_NAME = $$(IMAGE_PREFIX)-$$(1)-$$(2)
  KERNEL_PREFIX = $(1)
  KERNEL_SUFFIX := -kernel.bin
  KERNEL_IMAGE = $$(KERNEL_PREFIX)$$(KERNEL_SUFFIX)
  KERNEL_INITRAMFS_PREFIX = $$(IMAGE_PREFIX)-initramfs
  KERNEL_INITRAMFS_IMAGE = $$(KERNEL_INITRAMFS_PREFIX)$$(KERNEL_SUFFIX)
  KERNEL_INITRAMFS_NAME = $$(KERNEL_NAME)-initramfs
  KERNEL_INSTALL :=
  KERNEL_NAME := vmlinux
  KERNEL_DEPENDS :=
  KERNEL_SIZE :=

  FILESYSTEMS := $(TARGET_FILESYSTEMS)
endef

define Device/ExportVar
  $(1) : $(2):=$$($(2))

endef
define Device/Export
  $(foreach var,$(DEVICE_VARS) DEVICE_NAME KERNEL KERNEL_INITRAMFS KERNEL_INITRAMFS_IMAGE,$(call Device/ExportVar,$(1),$(var)))
  $(1) : FILESYSTEM:=$(2)
endef

define Device/Check
  _TARGET = $$(if $$(filter $(PROFILE),$$(PROFILES)),install,install-disabled)
  _COMPILE_TARGET = $$(if $(if $(IB),,$(CONFIG_IB)$$(filter $(PROFILE),$$(PROFILES))),compile,compile-disabled)
endef

ifndef IB
define Device/Build/initramfs
  $(call Device/Export,$(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE),$(1))
  $$(_TARGET): $(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE)

  $(KDIR)/$$(KERNEL_INITRAMFS_NAME):: image_prepare
  $(BIN_DIR)/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE)
	cp $$^ $$@

  $(KDIR)/tmp/$$(KERNEL_INITRAMFS_IMAGE): $(KDIR)/$$(KERNEL_INITRAMFS_NAME) $(CURDIR)/Makefile $$(KERNEL_DEPENDS)
	@rm -f $$@
	$$(call concat_cmd,$$(KERNEL_INITRAMFS))
endef
endif

define Device/Build/check_size
	@[ $$(($(subst k,* 1024,$(subst m, * 1024k,$(1))))) -ge "$$(stat -c%s $@)" ] || { \
		echo "WARNING: Image file $@ is too big" >&2; \
		rm -f $@; \
	}
endef

define Device/Build/compile
  $$(_COMPILE_TARGET): $(KDIR)/$(1)
  $(eval $(call Device/Export,$(KDIR)/$(1)))
  $(KDIR)/$(1):
	$$(call concat_cmd,$(COMPILE/$(1)))

endef

define Device/Build/kernel
  _KERNEL_IMAGES += $(KDIR)/$$(KERNEL_NAME)
  $(KDIR)/$$(KERNEL_NAME):: image_prepare
  $$(_TARGET): $$(if $$(KERNEL_INSTALL),$(BIN_DIR)/$$(KERNEL_IMAGE))
  $(call Device/Export,$(KDIR)/$$(KERNEL_IMAGE),$(1))
  $(BIN_DIR)/$$(KERNEL_IMAGE): $(KDIR)/$$(KERNEL_IMAGE)
	cp $$^ $$@
  ifndef IB
    ifdef CONFIG_IB
      install: $(KDIR)/$$(KERNEL_IMAGE)
    endif
    $(KDIR)/$$(KERNEL_IMAGE): $(KDIR)/$$(KERNEL_NAME) $(CURDIR)/Makefile $$(KERNEL_DEPENDS)
	@rm -f $$@
	$$(call concat_cmd,$$(KERNEL))
	$$(if $$(KERNEL_SIZE),$$(call Device/Build/check_size,$$(KERNEL_SIZE)))
  endif
endef

define Device/Build/image
  $$(_TARGET): $(BIN_DIR)/$(call IMAGE_NAME,$(1),$(2))
  $(eval $(call Device/Export,$(KDIR)/tmp/$(call IMAGE_NAME,$(1),$(2)),$(1)))
  $(KDIR)/tmp/$(call IMAGE_NAME,$(1),$(2)): $(KDIR)/$$(KERNEL_IMAGE) $(KDIR)/root.$(1)
	@rm -f $$@
	[ -f $$(word 1,$$^) -a -f $$(word 2,$$^) ]
	$$(call concat_cmd,$(if $(IMAGE/$(2)/$(1)),$(IMAGE/$(2)/$(1)),$(IMAGE/$(2))))

  .IGNORE: $(BIN_DIR)/$(call IMAGE_NAME,$(1),$(2))
  $(BIN_DIR)/$(call IMAGE_NAME,$(1),$(2)): $(KDIR)/tmp/$(call IMAGE_NAME,$(1),$(2))
	cp $$^ $$@

endef

define Device/Build
  $(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),$(call Device/Build/initramfs,$(1)))
  $(call Device/Build/kernel,$(1))

  $$(eval $$(foreach compile,$$(COMPILE), \
    $$(call Device/Build/compile,$$(compile),$(1))))

  $$(eval $$(foreach image,$$(IMAGES), \
    $$(foreach fs,$$(filter $(TARGET_FILESYSTEMS),$$(FILESYSTEMS)), \
      $$(call Device/Build/image,$$(fs),$$(image),$(1)))))
endef

define Device
  $(call Device/Init,$(1))
  $(call Device/Default,$(1))
  $(call Device/Check,$(1))
  $(call Device/$(1),$(1))
  $(call Device/Build,$(1))

endef

define BuildImage

  download:
  prepare:
  compile:
  clean:
  image_prepare:

  ifeq ($(IB),)
    .PHONY: download prepare compile clean image_prepare mkfs_prepare kernel_prepare install
    compile:
		$(call Build/Compile)

    clean:
		$(call Build/Clean)

    image_prepare: compile
		mkdir -p $(KDIR)/tmp
		$(call Image/Prepare)
  else
    image_prepare:
		mkdir -p $(KDIR)/tmp
  endif

  mkfs_prepare: image_prepare
	$(call Image/mkfs/prepare)

  kernel_prepare: mkfs_prepare
	$(call Image/BuildKernel)
	$(if $(CONFIG_TARGET_ROOTFS_INITRAMFS),$(if $(IB),,$(call Image/BuildKernel/Initramfs)))
	$(call Image/InstallKernel)

  $(foreach device,$(TARGET_DEVICES),$(call Device,$(device)))
  $(foreach fs,$(TARGET_FILESYSTEMS) $(fs-subtypes-y),$(call BuildImage/mkfs,$(fs)))

  install: kernel_prepare
	$(foreach fs,$(TARGET_FILESYSTEMS),
		$(call Image/Build,$(fs))
	)
	$(call Image/mkfs/ubifs)
	$(call Image/Checksum,md5sum --binary,md5sums)
	$(call Image/Checksum,openssl dgst -sha256,sha256sums)

endef