openwrt/include/image-commands.mk

564 lines
16 KiB
Makefile

# Build commands that can be called from Device/* templates
IMAGE_KERNEL = $(word 1,$^)
IMAGE_ROOTFS = $(word 2,$^)
define ModelNameLimit16
$(shell expr substr "$(word 2, $(subst _, ,$(1)))" 1 16)
endef
define rootfs_align
$(patsubst %-256k,0x40000,$(patsubst %-128k,0x20000,$(patsubst %-64k,0x10000,$(patsubst squashfs%,0x4,$(patsubst root.%,%,$(1))))))
endef
define Build/append-dtb
cat $(KDIR)/image-$(firstword $(DEVICE_DTS)).dtb >> $@
endef
define Build/append-dtb-elf
$(TARGET_CROSS)objcopy \
--set-section-flags=.appended_dtb=alloc,contents \
--update-section \
.appended_dtb=$(KDIR)/image-$(firstword $(DEVICE_DTS)).dtb $@
endef
define Build/append-kernel
dd if=$(IMAGE_KERNEL) >> $@
endef
define Build/package-kernel-ubifs
mkdir $@.kernelubifs
cp $@ $@.kernelubifs/kernel
$(STAGING_DIR_HOST)/bin/mkfs.ubifs \
$(KERNEL_UBIFS_OPTS) \
-r $@.kernelubifs $@
rm -r $@.kernelubifs
endef
define Build/append-image
dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
endef
ifdef IB
define Build/append-image-stage
dd if=$(STAGING_DIR_IMAGE)/$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))-$(DEVICE_NAME)-$(1) >> $@
endef
else
define Build/append-image-stage
dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) of=$(STAGING_DIR_IMAGE)/$(BOARD)$(if $(SUBTARGET),-$(SUBTARGET))-$(DEVICE_NAME)-$(1)
dd if=$(BIN_DIR)/$(DEVICE_IMG_PREFIX)-$(1) >> $@
endef
endif
compat_version=$(if $(DEVICE_COMPAT_VERSION),$(DEVICE_COMPAT_VERSION),1.0)
json_quote=$(subst ','\'',$(subst ",\",$(1)))
#")')
legacy_supported_message=$(SUPPORTED_DEVICES) - Image version mismatch: image $(compat_version), \
device 1.0. Please wipe config during upgrade (force required) or reinstall. \
$(if $(DEVICE_COMPAT_MESSAGE),Reason: $(DEVICE_COMPAT_MESSAGE),Please check documentation ...)
metadata_devices=$(if $(1),$(subst "$(space)","$(comma)",$(strip $(foreach v,$(1),"$(call json_quote,$(v))"))))
metadata_json = \
'{ $(if $(IMAGE_METADATA),$(IMAGE_METADATA)$(comma)) \
"metadata_version": "1.1", \
"compat_version": "$(call json_quote,$(compat_version))", \
$(if $(DEVICE_COMPAT_MESSAGE),"compat_message": "$(call json_quote,$(DEVICE_COMPAT_MESSAGE))"$(comma)) \
$(if $(filter-out 1.0,$(compat_version)),"new_supported_devices": \
[$(call metadata_devices,$(SUPPORTED_DEVICES))]$(comma) \
"supported_devices": ["$(call json_quote,$(legacy_supported_message))"]$(comma)) \
$(if $(filter 1.0,$(compat_version)),"supported_devices":[$(call metadata_devices,$(SUPPORTED_DEVICES))]$(comma)) \
"version": { \
"dist": "$(call json_quote,$(VERSION_DIST))", \
"version": "$(call json_quote,$(VERSION_NUMBER))", \
"revision": "$(call json_quote,$(REVISION))", \
"target": "$(call json_quote,$(TARGETID))", \
"board": "$(call json_quote,$(if $(BOARD_NAME),$(BOARD_NAME),$(DEVICE_NAME)))" \
} \
}'
define Build/append-metadata
$(if $(SUPPORTED_DEVICES),-echo $(call metadata_json) | fwtool -I - $@)
[ ! -s "$(BUILD_KEY)" -o ! -s "$(BUILD_KEY).ucert" -o ! -s "$@" ] || { \
cp "$(BUILD_KEY).ucert" "$@.ucert" ;\
usign -S -m "$@" -s "$(BUILD_KEY)" -x "$@.sig" ;\
ucert -A -c "$@.ucert" -x "$@.sig" ;\
fwtool -S "$@.ucert" "$@" ;\
}
endef
define Build/append-rootfs
dd if=$(IMAGE_ROOTFS) >> $@
endef
define Build/append-squashfs-fakeroot-be
rm -rf $@.fakefs $@.fakesquashfs
mkdir $@.fakefs
$(STAGING_DIR_HOST)/bin/mksquashfs-lzma \
$@.fakefs $@.fakesquashfs \
-noappend -root-owned -be -nopad -b 65536 \
$(if $(SOURCE_DATE_EPOCH),-fixed-time $(SOURCE_DATE_EPOCH))
cat $@.fakesquashfs >> $@
endef
define Build/append-string
echo -n $(1) >> $@
endef
define Build/append-ubi
sh $(TOPDIR)/scripts/ubinize-image.sh \
$(if $(UBOOTENV_IN_UBI),--uboot-env) \
$(if $(KERNEL_IN_UBI),--kernel $(IMAGE_KERNEL)) \
$(foreach part,$(UBINIZE_PARTS),--part $(part)) \
--rootfs $(IMAGE_ROOTFS) \
$@.tmp \
-p $(BLOCKSIZE:%k=%KiB) -m $(PAGESIZE) \
$(if $(SUBPAGESIZE),-s $(SUBPAGESIZE)) \
$(if $(VID_HDR_OFFSET),-O $(VID_HDR_OFFSET)) \
$(UBINIZE_OPTS)
cat $@.tmp >> $@
rm $@.tmp
endef
define Build/ubinize-kernel
cp $@ $@.tmp
sh $(TOPDIR)/scripts/ubinize-image.sh \
--kernel $@.tmp \
$@ \
-p $(BLOCKSIZE:%k=%KiB) -m $(PAGESIZE) \
$(if $(SUBPAGESIZE),-s $(SUBPAGESIZE)) \
$(if $(VID_HDR_OFFSET),-O $(VID_HDR_OFFSET)) \
$(UBINIZE_OPTS)
rm $@.tmp
endef
define Build/append-uboot
dd if=$(UBOOT_PATH) >> $@
endef
# append a fake/empty uImage header, to fool bootloaders rootfs integrity check
# for example
define Build/append-uImage-fakehdr
$(eval type=$(word 1,$(1)))
$(eval magic=$(word 2,$(1)))
touch $@.fakehdr
$(STAGING_DIR_HOST)/bin/mkimage \
-A $(LINUX_KARCH) -O linux -T $(type) -C none \
-n '$(VERSION_DIST) fake $(type)' \
$(if $(magic),-M $(magic)) \
-d $@.fakehdr \
-s \
$@.fakehdr
cat $@.fakehdr >> $@
endef
define Build/buffalo-dhp-image
$(STAGING_DIR_HOST)/bin/mkdhpimg $@ $@.new
mv $@.new $@
endef
define Build/buffalo-enc
$(eval product=$(word 1,$(1)))
$(eval version=$(word 2,$(1)))
$(eval args=$(wordlist 3,$(words $(1)),$(1)))
$(STAGING_DIR_HOST)/bin/buffalo-enc \
-p $(product) -v $(version) $(args) \
-i $@ -o $@.new
mv $@.new $@
endef
define Build/buffalo-enc-tag
$(call Build/buffalo-enc,'' '' -S 152 $(1))
endef
define Build/buffalo-tag-dhp
$(eval product=$(word 1,$(1)))
$(eval region=$(word 2,$(1)))
$(eval language=$(word 3,$(1)))
$(STAGING_DIR_HOST)/bin/buffalo-tag \
-d 0x01000000 -w 1 \
-a $(BUFFALO_TAG_PLATFORM) \
-v $(BUFFALO_TAG_VERSION) -m $(BUFFALO_TAG_MINOR) \
-b $(product) -p $(product) \
-r $(region) -r $(region) -l $(language) \
-I $@ -o $@.new
mv $@.new $@
endef
define Build/check-size
@imagesize="$$(stat -c%s $@)"; \
limitsize="$$(($(subst k,* 1024,$(subst m, * 1024k,$(if $(1),$(1),$(IMAGE_SIZE))))))"; \
[ $$limitsize -ge $$imagesize ] || { \
$(call ERROR_MESSAGE, WARNING: Image file $@ is too big: $$imagesize > $$limitsize); \
rm -f $@; \
}
endef
define Build/copy-file
cat "$(1)" > "$@"
endef
define Build/elecom-product-header
$(eval product=$(word 1,$(1)))
$(eval fw=$(if $(word 2,$(1)),$(word 2,$(1)),$@))
( \
echo -n -e "ELECOM\x00\x00$(product)" | dd bs=40 count=1 conv=sync; \
echo -n "0.00" | dd bs=16 count=1 conv=sync; \
dd if=$(fw); \
) > $(fw).new
mv $(fw).new $(fw)
endef
define Build/elecom-wrc-gs-factory
$(eval product=$(word 1,$(1)))
$(eval version=$(word 2,$(1)))
$(eval hash_opt=$(word 3,$(1)))
$(MKHASH) md5 $(hash_opt) $@ >> $@
( \
echo -n "ELECOM $(product) v$(version)" | \
dd bs=32 count=1 conv=sync; \
dd if=$@; \
) > $@.new
mv $@.new $@
endef
define Build/elx-header
$(eval hw_id=$(word 1,$(1)))
$(eval xor_pattern=$(word 2,$(1)))
( \
echo -ne "\x00\x00\x00\x00\x00\x00\x00\x03" | \
dd bs=42 count=1 conv=sync; \
hw_id="$(hw_id)"; \
echo -ne "\x$${hw_id:0:2}\x$${hw_id:2:2}\x$${hw_id:4:2}\x$${hw_id:6:2}" | \
dd bs=20 count=1 conv=sync; \
echo -ne "$$(printf '%08x' $$(stat -c%s $@) | fold -s2 | xargs -I {} echo \\x{} | tr -d '\n')" | \
dd bs=8 count=1 conv=sync; \
echo -ne "$$($(MKHASH) md5 $@ | fold -s2 | xargs -I {} echo \\x{} | tr -d '\n')" | \
dd bs=58 count=1 conv=sync; \
) > $(KDIR)/tmp/$(DEVICE_NAME).header
$(call Build/xor-image,-p $(xor_pattern) -x)
cat $(KDIR)/tmp/$(DEVICE_NAME).header $@ > $@.new
mv $@.new $@
rm -rf $(KDIR)/tmp/$(DEVICE_NAME).header
endef
define Build/eva-image
$(STAGING_DIR_HOST)/bin/lzma2eva $(KERNEL_LOADADDR) $(KERNEL_LOADADDR) $@ $@.new
mv $@.new $@
endef
define Build/initrd_compression
$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_BZIP2),.bzip2) \
$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_GZIP),.gzip) \
$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),.lzma) \
$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),.xz) \
$(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),.zstd)
endef
define Build/fit
$(TOPDIR)/scripts/mkits.sh \
-D $(DEVICE_NAME) -o $@.its -k $@ \
-C $(word 1,$(1)) $(if $(word 2,$(1)),\
$(if $(DEVICE_DTS_OVERLAY),-d $(KERNEL_BUILD_DIR)/image-$$(basename $(word 2,$(1))),\
-d $(word 2,$(1)))) \
$(if $(findstring with-rootfs,$(word 3,$(1))),-r $(IMAGE_ROOTFS)) \
$(if $(findstring with-initrd,$(word 3,$(1))), \
$(if $(CONFIG_TARGET_ROOTFS_INITRAMFS_SEPARATE), \
-i $(KERNEL_BUILD_DIR)/initrd.cpio$(strip $(call Build/initrd_compression)))) \
-a $(KERNEL_LOADADDR) -e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
$(if $(DEVICE_FDT_NUM),-n $(DEVICE_FDT_NUM)) \
$(if $(DEVICE_DTS_DELIMITER),-l $(DEVICE_DTS_DELIMITER)) \
$(if $(DEVICE_DTS_OVERLAY),$(foreach dtso,$(DEVICE_DTS_OVERLAY), -O $(dtso):$(KERNEL_BUILD_DIR)/image-$(dtso).dtb)) \
-c $(if $(DEVICE_DTS_CONFIG),$(DEVICE_DTS_CONFIG),"config-1") \
-A $(LINUX_KARCH) -v $(LINUX_VERSION)
PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage $(if $(findstring external,$(word 3,$(1))),\
-E -B 0x1000 $(if $(findstring static,$(word 3,$(1))),-p 0x1000)) -f $@.its $@.new
@mv $@.new $@
endef
define Build/gzip
gzip -f -9n -c $@ $(1) > $@.new
@mv $@.new $@
endef
define Build/install-dtb
$(call locked, \
$(foreach dts,$(DEVICE_DTS), \
$(CP) \
$(DTS_DIR)/$(dts).dtb \
$(BIN_DIR)/$(IMG_PREFIX)-$(dts).dtb; \
), \
install-dtb-$(IMG_PREFIX) \
)
endef
define Build/iptime-crc32
$(STAGING_DIR_HOST)/bin/iptime-crc32 $(1) $@ $@.new
mv $@.new $@
endef
define Build/iptime-naspkg
$(STAGING_DIR_HOST)/bin/iptime-naspkg $(1) $@ $@.new
mv $@.new $@
endef
define Build/jffs2
rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 && \
mkdir -p $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$$(dirname $(1)) && \
cp $@ $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/$(1) && \
$(STAGING_DIR_HOST)/bin/mkfs.jffs2 --pad \
$(if $(CONFIG_BIG_ENDIAN),--big-endian,--little-endian) \
--squash-uids -v -e $(patsubst %k,%KiB,$(BLOCKSIZE)) \
-o $@.new \
-d $(KDIR_TMP)/$(DEVICE_NAME)/jffs2 \
2>&1 1>/dev/null | awk '/^.+$$$$/' && \
$(STAGING_DIR_HOST)/bin/padjffs2 $@.new -J $(patsubst %k,,$(BLOCKSIZE))
-rm -rf $(KDIR_TMP)/$(DEVICE_NAME)/jffs2/
@mv $@.new $@
endef
define Build/kernel2minor
$(eval temp_file := $(shell mktemp))
cp $@ $(temp_file)
kernel2minor -k $(temp_file) -r $(temp_file).new $(1)
mv $(temp_file).new $@
rm -f $(temp_file)
endef
define Build/kernel-bin
rm -f $@
cp $< $@
endef
define Build/linksys-image
$(TOPDIR)/scripts/linksys-image.sh \
"$(call param_get_default,type,$(1),$(DEVICE_NAME))" \
$@ $@.new
mv $@.new $@
endef
define Build/lzma
$(call Build/lzma-no-dict,-lc1 -lp2 -pb2 $(1))
endef
define Build/lzma-no-dict
$(STAGING_DIR_HOST)/bin/lzma e $@ $(1) $@.new
@mv $@.new $@
endef
define Build/netgear-chk
$(STAGING_DIR_HOST)/bin/mkchkimg \
-o $@.new \
-k $@ \
-b $(NETGEAR_BOARD_ID) \
$(if $(NETGEAR_REGION),-r $(NETGEAR_REGION),)
mv $@.new $@
endef
define Build/netgear-dni
$(STAGING_DIR_HOST)/bin/mkdniimg \
-B $(NETGEAR_BOARD_ID) -v $(VERSION_DIST).$(firstword $(subst -, ,$(REVISION))) \
$(if $(NETGEAR_HW_ID),-H $(NETGEAR_HW_ID)) \
-r "$(1)" \
-i $@ -o $@.new
mv $@.new $@
endef
define Build/openmesh-image
$(TOPDIR)/scripts/om-fwupgradecfg-gen.sh \
"$(call param_get_default,ce_type,$(1),$(DEVICE_NAME))" \
"$@-fwupgrade.cfg" \
"$(call param_get_default,kernel,$(1),$(IMAGE_KERNEL))" \
"$(call param_get_default,rootfs,$(1),$@)"
$(TOPDIR)/scripts/combined-ext-image.sh \
"$(call param_get_default,ce_type,$(1),$(DEVICE_NAME))" "$@" \
"$@-fwupgrade.cfg" "fwupgrade.cfg" \
"$(call param_get_default,kernel,$(1),$(IMAGE_KERNEL))" "kernel" \
"$(call param_get_default,rootfs,$(1),$@)" "rootfs"
endef
define Build/pad-extra
dd if=/dev/zero bs=$(1) count=1 >> $@
endef
define Build/pad-offset
let \
size="$$(stat -c%s $@)" \
pad="$(subst k,* 1024,$(word 1, $(1)))" \
offset="$(subst k,* 1024,$(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/pad-rootfs
$(STAGING_DIR_HOST)/bin/padjffs2 $@ $(1) \
$(if $(BLOCKSIZE),$(BLOCKSIZE:%k=%),4 8 16 64 128 256)
endef
define Build/pad-to
$(call Image/pad-to,$@,$(1))
endef
define Build/patch-cmdline
$(STAGING_DIR_HOST)/bin/patch-cmdline $@ '$(CMDLINE)'
endef
# Convert a raw image into a $1 type image.
# E.g. | qemu-image vdi <optional extra arguments to qemu-img binary>
define Build/qemu-image
if command -v qemu-img; then \
qemu-img convert -f raw -O $1 $@ $@.new; \
mv $@.new $@; \
else \
echo "WARNING: Install qemu-img to create VDI/VMDK images" >&2; exit 1; \
fi
endef
define Build/qsdk-ipq-factory-nand
$(TOPDIR)/scripts/mkits-qsdk-ipq-image.sh \
$@.its ubi $@
PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
@mv $@.new $@
endef
define Build/qsdk-ipq-factory-nor
$(TOPDIR)/scripts/mkits-qsdk-ipq-image.sh \
$@.its hlos $(IMAGE_KERNEL) rootfs $(IMAGE_ROOTFS)
PATH=$(LINUX_DIR)/scripts/dtc:$(PATH) mkimage -f $@.its $@.new
@mv $@.new $@
endef
define Build/seama
$(STAGING_DIR_HOST)/bin/seama -i $@ \
-m "dev=/dev/mtdblock/$(SEAMA_MTDBLOCK)" -m "type=firmware"
mv $@.seama $@
endef
define Build/seama-seal
$(STAGING_DIR_HOST)/bin/seama -i $@ -s $@.seama \
-m "signature=$(SEAMA_SIGNATURE)"
mv $@.seama $@
endef
define Build/senao-header
$(STAGING_DIR_HOST)/bin/mksenaofw $(1) -e $@ -o $@.new
mv $@.new $@
endef
define Build/sysupgrade-tar
sh $(TOPDIR)/scripts/sysupgrade-tar.sh \
--board $(if $(BOARD_NAME),$(BOARD_NAME),$(DEVICE_NAME)) \
--kernel $(call param_get_default,kernel,$(1),$(IMAGE_KERNEL)) \
--rootfs $(call param_get_default,rootfs,$(1),$(IMAGE_ROOTFS)) \
$@
endef
define Build/tplink-safeloader
-$(STAGING_DIR_HOST)/bin/tplink-safeloader \
-B $(TPLINK_BOARD_ID) \
-V $(REVISION) \
-k $(IMAGE_KERNEL) \
-r $@ \
-o $@.new \
-j \
$(wordlist 2,$(words $(1)),$(1)) \
$(if $(findstring sysupgrade,$(word 1,$(1))),-S) && mv $@.new $@ || rm -f $@
endef
define Build/tplink-v1-header
$(STAGING_DIR_HOST)/bin/mktplinkfw \
-c -H $(TPLINK_HWID) -W $(TPLINK_HWREV) -L $(KERNEL_LOADADDR) \
-E $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
-m $(TPLINK_HEADER_VERSION) -N "$(VERSION_DIST)" -V $(REVISION) \
-k $@ -o $@.new $(1)
@mv $@.new $@
endef
# combine kernel and rootfs into one image
# mktplinkfw <type> <optional extra arguments to mktplinkfw binary>
# <type> is "sysupgrade" or "factory"
#
# -a align the rootfs start on an <align> bytes boundary
# -j add jffs2 end-of-filesystem markers
# -s strip padding from end of the image
# -X reserve <size> bytes in the firmware image (hexval prefixed with 0x)
define Build/tplink-v1-image
-$(STAGING_DIR_HOST)/bin/mktplinkfw \
-H $(TPLINK_HWID) -W $(TPLINK_HWREV) -F $(TPLINK_FLASHLAYOUT) \
-N "$(VERSION_DIST)" -V $(REVISION) -m $(TPLINK_HEADER_VERSION) \
-k $(IMAGE_KERNEL) -r $(IMAGE_ROOTFS) -o $@.new -j -X 0x40000 \
-a $(call rootfs_align,$(FILESYSTEM)) \
$(wordlist 2,$(words $(1)),$(1)) \
$(if $(findstring sysupgrade,$(word 1,$(1))),-s) && mv $@.new $@ || rm -f $@
endef
define Build/tplink-v2-header
$(STAGING_DIR_HOST)/bin/mktplinkfw2 \
-c -H $(TPLINK_HWID) -W $(TPLINK_HWREV) -L $(KERNEL_LOADADDR) \
-E $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
-w $(TPLINK_HWREVADD) -F "$(TPLINK_FLASHLAYOUT)" \
-T $(TPLINK_HVERSION) -V "ver. 2.0" \
-k $@ -o $@.new $(1)
@mv $@.new $@
endef
define Build/tplink-v2-image
$(STAGING_DIR_HOST)/bin/mktplinkfw2 \
-H $(TPLINK_HWID) -W $(TPLINK_HWREV) \
-w $(TPLINK_HWREVADD) -F "$(TPLINK_FLASHLAYOUT)" \
-T $(TPLINK_HVERSION) -V "ver. 2.0" -a 0x4 -j \
-k $(IMAGE_KERNEL) -r $(IMAGE_ROOTFS) -o $@.new $(1)
cat $@.new >> $@
rm -rf $@.new
endef
define Build/uImage
mkimage \
-A $(LINUX_KARCH) \
-O linux \
-T kernel \
-C $(word 1,$(1)) \
-a $(KERNEL_LOADADDR) \
-e $(if $(KERNEL_ENTRY),$(KERNEL_ENTRY),$(KERNEL_LOADADDR)) \
-n '$(if $(UIMAGE_NAME),$(UIMAGE_NAME),$(call toupper,$(LINUX_KARCH)) $(VERSION_DIST) Linux-$(LINUX_VERSION))' \
$(if $(UIMAGE_MAGIC),-M $(UIMAGE_MAGIC)) \
$(wordlist 2,$(words $(1)),$(1)) \
-d $@ $@.new
mv $@.new $@
endef
define Build/xor-image
$(STAGING_DIR_HOST)/bin/xorimage -i $@ -o $@.xor $(1)
mv $@.xor $@
endef
define Build/zip
rm -rf $@.tmp
mkdir $@.tmp
mv $@ $@.tmp/$(word 1,$(1))
$(STAGING_DIR_HOST)/bin/zip -j -X \
$(if $(SOURCE_DATE_EPOCH),--mtime="$(SOURCE_DATE_EPOCH)") \
$(wordlist 2,$(words $(1)),$(1)) \
$@ $@.tmp/$(if $(word 1,$(1)),$(word 1,$(1)),$$(basename $@))
rm -rf $@.tmp
endef
define Build/zyxel-ras-image
let \
newsize="$(subst k,* 1024,$(RAS_ROOTFS_SIZE))"; \
$(STAGING_DIR_HOST)/bin/mkrasimage \
-b $(RAS_BOARD) \
-v $(RAS_VERSION) \
-r $@ \
-s $$newsize \
-o $@.new \
$(if $(findstring separate-kernel,$(word 1,$(1))),-k $(IMAGE_KERNEL)) \
&& mv $@.new $@
endef