On Tue, 2021-06-15 at 16:50 +0300, Petr Nechaev wrote:

Hi All,

I've been using bitbake for >5 years now, however I do not understand 
the nature of the problem at all. Could you clarify what the problem is 
i.e. what's the difference between these lines:

IMAGE_FSTYPES = "${INITRAMFS_FSTYPES}"
VAR_A = "${VAR_B}"

Consider this example where the BSP sets:

IMAGE_FSTYPES = "tar"
IMAGE_FSTYPES_somemachine = "ext4"
INITRAMFS_FSTYPES = "cpio"
OVERRIDES = "${MACHINE}"

then the initramfs image recipe does:

IMAGE_FSTYPES = "${INITRAMFS_FSTYPES}"


Given that config, if you set MACHINE = "somemachine", which image 
type would you expect the initramfs image to have?


The answer is that it will try and generate an ext4 initramfs. 
What you'd expect/want is a cpio initramfs.

The reason is that the machine override, i.e.:

IMAGE_FSTYPES_somemachine = "ext4"

cannot be undone.

Cheers,

Richard