[LEDE-DEV] per device rootfs vs multiple devices

Matthias Schiffer mschiffer at universe-factory.net
Wed Oct 12 04:27:32 PDT 2016

On 10/12/2016 12:59 PM, Karl Palsson wrote:
> Hi,
> I was trying to add help text to the generated Kconfig for the
> settings based on some irc conversations with nbd, and was trying
> out the behaviour to verify my help text.
> The text I've got for per device rootfs is:
> "When disabled, all device packages from all selected devices
> will be included in all images. When enabled, this is split,
> however you can no longer disable individual device packages."
> I locally modified two targets to have extra "DEVICE_PACKAGES"
> (Added avrdude to one target and sqlite3-cli to another)
> Doing a full "make clean; rm .config, menuconfig; select multi
> profile, select two devices; make" _without_ per device rotofs,
> gives me an image with both device packages in both device
> images, as expected. In menuconfig, the two packages are marked
> as * by default, but can be deselected, or changed to M without
> problem.
> However, enabling CONFIG_TARGET_PER_DEVICE_ROOTFS seems to only
> be affecting the select/deselect behaviour. The two packages are
> now shown in menuconfig as {*} and can't be disabled anymore.
> That is as per nbd's description. But with the full make clean,
> rm .config builds, _both_ target images are still including both
> packages. Further, there's only a single rootfs file built in the
> bin directory. "lede-ar71xx-generic-root.squashfs"
> I presume this is a bug in the PER_DEVICE_ROOTFS support, but it
> could also just be that the documentation isn't clear and I
> misunderstood nbd's description.
> Directions?
> Sincerely,
> Karl Palsson

{*} means that the package can't be disabled completely, but it can be set
to M. This should give you the desired behaviour.

Creating a new config and setting CONFIG_TARGET_PER_DEVICE_ROOTFS from the
beginning also works and sets all used DEVICE_PACKAGES to M. As your
workflow created a config with these packages set to * first, you ended up
with these packages still being selected after switching to

The additional rootfs aren't ever copied to the bin directory, so finding
only a single lede-ar71xx-generic-root.squashfs is expected.


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