[yocto] is there really an "INITRD_IMAGE" variable?

[Robert P. J. Day]

  (asked about this on the OE list recently, but no response, so i'll
harass this list.)

  poking around initramfs content and recipes, and noticed this in the
latest poky checkout:

$ grep -rw INITRD_IMAGE *
documentation/ref-manual/ref-variables.xml:        <glossentry id='var-INITRD_IMAGE'><glossterm>INITRD_IMAGE</glossterm>
documentation/ref-manual/ref-variables.xml:                INITRD_IMAGE[doc] = "When building a "live" bootable image (i.e. when IMAGE_FSTYPES contains "live"), INITRD_IMAGE specifies the image recipe that should be built to provide the initial RAM disk image."
documentation/ref-manual/ref-variables.xml:                    contains "live"), <filename>INITRD_IMAGE</filename>
meta/recipes-extended/images/core-image-testmaster.bb:INITRD_IMAGE = "core-image-testmaster-initramfs"
$

  so ... a bit of documentation on the alleged variable INITRD_IMAGE,
and a single assignment, and no usage.

  but if i drop the requirement that it be a word:

$ grep -r INITRD_IMAGE *
documentation/ref-manual/ref-variables.xml:        <glossentry id='var-INITRD_IMAGE'><glossterm>INITRD_IMAGE</glossterm>
documentation/ref-manual/ref-variables.xml:                INITRD_IMAGE[doc] = "When building a "live" bootable image (i.e. when IMAGE_FSTYPES contains "live"), INITRD_IMAGE specifies the image recipe that should be built to provide the initial RAM disk image."
documentation/ref-manual/ref-variables.xml:                    contains "live"), <filename>INITRD_IMAGE</filename>
meta/recipes-extended/images/core-image-testmaster.bb:INITRD_IMAGE = "core-image-testmaster-initramfs"
meta/classes/image-vm.bbclass:# Using an initramfs is optional. Enable it by setting INITRD_IMAGE_VM.
meta/classes/image-vm.bbclass:INITRD_IMAGE_VM ?= ""
meta/classes/image-vm.bbclass:INITRD_VM ?= "${@'${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE_VM}-${MACHINE}.cpio.gz' if '${INITRD_IMAGE_VM}' else ''}"
meta/classes/image-vm.bbclass:do_bootdirectdisk[depends] += "${@'${INITRD_IMAGE_VM}:do_image_complete' if '${INITRD_IMAGE_VM}' else ''}"
meta/classes/image-live.bbclass:INITRD_IMAGE_LIVE ?= "core-image-minimal-initramfs"
meta/classes/image-live.bbclass:INITRD_LIVE ?= "${DEPLOY_DIR_IMAGE}/${INITRD_IMAGE_LIVE}-${MACHINE}.cpio.gz"
meta/classes/image-live.bbclass:    initrd_i = d.getVar('INITRD_IMAGE_LIVE', True)
meta/classes/image-live.bbclass:        bb.error('INITRD_IMAGE_LIVE %s cannot use image live, hddimg or iso.' % initrd_i)
$

suddenly, i see references to "INITRD_IMAGE_VM" and
"INITRD_IMAGE_LIVE". so is "INITRD_IMAGE" correct? i don't see how
that makes sense unless "VM" and "LIVE" are some weird form of
override.

  thoughts?

rday

-- 

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Robert P. J. Day                                 Ottawa, Ontario, CANADA
                        http://crashcourse.ca

Twitter:                                       http://twitter.com/rpjday
LinkedIn:                               http://ca.linkedin.com/in/rpjday
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