66 lines
2 KiB
Makefile
66 lines
2 KiB
Makefile
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obj-y := initramfs_data.o
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hostprogs-y := gen_init_cpio
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clean-files := initramfs_data.cpio.gz initramfs_list
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# initramfs_data.o contains the initramfs_data.cpio.gz image.
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# The image is included using .incbin, a dependency which is not
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# tracked automatically.
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$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
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ifdef CONFIG_INITRAMFS_ROOT_UID
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gen_initramfs_args += -u $(CONFIG_INITRAMFS_ROOT_UID)
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endif
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ifdef CONFIG_INITRAMFS_ROOT_GID
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gen_initramfs_args += -g $(CONFIG_INITRAMFS_ROOT_GID)
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endif
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# The $(shell echo $(CONFIG_INITRAMFS_SOURCE)) is to remove the
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# gratuitous begin and end quotes from the Kconfig string type.
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# Internal, escaped quotes in the Kconfig string will loose the
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# escape and become active quotes.
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quotefixed_initramfs_source := $(shell echo $(CONFIG_INITRAMFS_SOURCE))
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filechk_initramfs_list = $(CONFIG_SHELL) \
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$(srctree)/scripts/gen_initramfs_list.sh $(gen_initramfs_args) $(quotefixed_initramfs_source)
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$(obj)/initramfs_list: FORCE
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$(call filechk,initramfs_list)
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quiet_cmd_cpio = CPIO $@
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cmd_cpio = ./$< $(obj)/initramfs_list > $@
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# Check if the INITRAMFS_SOURCE is a cpio archive
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ifneq (,$(findstring .cpio,$(quotefixed_initramfs_source)))
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# INITRAMFS_SOURCE has a cpio archive - verify that it's a single file
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ifneq (1,$(words $(quotefixed_initramfs_source)))
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$(error Only a single file may be specified in CONFIG_INITRAMFS_SOURCE (="$(quotefixed_initramfs_source)") when a cpio archive is directly specified.)
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endif
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# Now use the cpio archive directly
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initramfs_data_cpio = $(quotefixed_initramfs_source)
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targets += $(quotefixed_initramfs_source)
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else
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# INITRAMFS_SOURCE is not a cpio archive - create one
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$(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio \
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$(initramfs-y) $(obj)/initramfs_list FORCE
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$(call if_changed,cpio)
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targets += initramfs_data.cpio
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initramfs_data_cpio = $(obj)/initramfs_data.cpio
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endif
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$(obj)/initramfs_data.cpio.gz: $(initramfs_data_cpio) FORCE
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$(call if_changed,gzip)
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targets += initramfs_data.cpio.gz
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