+define Build/check-size
+ @imagesize="$$(stat -c%s $@)"; \
+ limitsize="$$(($(call exp_units,$(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/dlink-sge-image
+ $(STAGING_DIR_HOST)/bin/dlink-sge-image $(1) $@ $@.enc
+ mv $@.enc $@
+endef
+
+define Build/edimax-header
+ $(STAGING_DIR_HOST)/bin/mkedimaximg -i $@ -o $@.new $(1)
+ @mv $@.new $@
+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_LZ4),.lz4) \
+ $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZMA),.lzma) \
+ $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_LZO),.lzo) \
+ $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_XZ),.xz) \
+ $(if $(CONFIG_TARGET_INITRAMFS_COMPRESSION_ZSTD),.zstd)