################################################################################
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#
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# Build a kernel with an integrated initial ramdisk filesystem based on cpio.
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#
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################################################################################
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# The generic fs infrastructure isn't very useful here.
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#
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# The initramfs image does not actually build an image; its only purpose is:
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# 1- to ensure rootfs.cpio is generated,
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# 2- to then rebuild the kernel with rootfs.cpio as initramfs
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#
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# Note: ordering of the dependencies is not guaranteed here, but in
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# linux/linux.mk, via the linux-rebuild-with-initramfs rule, which depends
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# on the rootfs-cpio filesystem rule.
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#
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# Note: the trick here is that we directly depend on rebuilding the Linux
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# kernel image (which itself depends on the rootfs-cpio rule), while we
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# advertise that our dependency is on the rootfs-cpio rule, which is
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# cleaner in the dependency graph.
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rootfs-initramfs: linux-rebuild-with-initramfs
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rootfs-initramfs-show-depends:
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@echo rootfs-cpio
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.PHONY: rootfs-initramfs rootfs-initramfs-show-depends
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ifeq ($(BR2_TARGET_ROOTFS_INITRAMFS),y)
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TARGETS_ROOTFS += rootfs-initramfs
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endif
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# Not using the rootfs infra, so fake the variables
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ROOTFS_INITRAMFS_NAME = rootfs-initramfs
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ROOTFS_INITRAMFS_TYPE = rootfs
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ROOTFS_INITRAMFS_DEPENDENCIES = rootfs-cpio linux
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