The image_types.bbclass is a must since we use this in image.bbclass:
[snip]
python () {
deps = " " + imagetypes_getdepends(d)
d.appendVarFlag('do_rootfs', 'depends', deps)
[snip]
The imagetypes_getdepends() is defined in image_types.bbclass. Use "+="
to replace "?=" since it is a must, so that the user can use
"IMAGE_CLASSES = foo.bbclass" in local.conf to add their own image
class.
NOTE: the IMAGE_CLASSES_append = " foo" doesn't work since we use this
in image.bbclass:
IMAGE_CLASSES += "image_types"
inherit ${IMAGE_CLASSES}
I think that it is because inherit takes effect before append?
Another way to fix the problem is:
IMAGE_CLASSES ?= ""
inherit image_types ${IMAGE_CLASSES}
But it seems that we need another name for IMAGE_CLASSES, for example
IMAGE_CLASSES_EXTRA, and also need update the doc, which would make it
complicated.
(From OE-Core rev: c225613d997ef40dedf64b880b5ca4ae89adfded)
Signed-off-by: Robert Yang <liezhi.yang@windriver.com>
Signed-off-by: Richard Purdie <richard.purdie@linuxfoundation.org>
c4f51a048f