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Makefile

obj-y := initramfs_data.o
hostprogs-y := gen_init_cpio
clean-files := initramfs_data.cpio.gz initramfs_list
# If you want a different list of files in the initramfs_data.cpio
# then you can either overwrite the cpio_list in this directory
# or set INITRAMFS_LIST to another filename.
INITRAMFS_LIST := $(obj)/initramfs_list
# initramfs_data.o contains the initramfs_data.cpio.gz image.
# The image is included using .incbin, a dependency which is not
# tracked automatically.
$(obj)/initramfs_data.o: $(obj)/initramfs_data.cpio.gz FORCE
# initramfs-y are the programs which will be copied into the CPIO
# archive. Currently, the filenames are hardcoded in gen_init_cpio,
# but we need the information for the build as well, so it's duplicated
# here.
# Commented out for now
# initramfs-y := $(obj)/root/hello
filechk_initramfs_list = $(CONFIG_SHELL) \
$(srctree)/scripts/gen_initramfs_list.sh $(CONFIG_INITRAMFS_SOURCE)
$(obj)/initramfs_list: FORCE
$(call filechk,initramfs_list)
quiet_cmd_cpio = CPIO $@
cmd_cpio = ./$< $(obj)/initramfs_list > $@
$(obj)/initramfs_data.cpio: $(obj)/gen_init_cpio \
$(initramfs-y) $(obj)/initramfs_list FORCE
$(call if_changed,cpio)
targets += initramfs_data.cpio
$(obj)/initramfs_data.cpio.gz: $(obj)/initramfs_data.cpio FORCE
$(call if_changed,gzip)
targets += initramfs_data.cpio.gz