[OE-core] do_kernel_configme and defconfig

chris.laplante at agilent.com chris.laplante at agilent.com
Fri May 11 19:28:33 UTC 2018

OK, I figured out why this happens. This line in kernel-yocto.bbclass:

scc --force -o ${S}/${meta_dir}:cfg,merge,meta ${includes} ${bsp_definition} ${sccs} ${patches} ${KERNEL_FEATURES}

... passes the BSP def before the sccs. In my case, the BSP def is mymachine.scc, and the sccs is the defconfig. So that's why the defconfig comes after the BSP.

My takeaway is that a BSP plus a defconfig is not a supported use case. Is that correct?

If so, I think it's important to add some sanity checking to kernel-yocto.bbclass.


From: openembedded-core-bounces at lists.openembedded.org [mailto:openembedded-core-bounces at lists.openembedded.org] On Behalf Of Chris Laplante via Openembedded-core
Sent: Friday, May 11, 2018 2:51 PM
To: openembedded-core at lists.openembedded.org
Cc: SMITH,JARED (A-Little Falls,ex1) <jared.smith at agilent.com>
Subject: [OE-core] do_kernel_configme and defconfig

Hi all,

Is it expected for do_kernel_configme to apply the defconfig last (after configuration fragments introduced by sccs)?

For some reason, in the call to merge_config, ".kernel-meta/configs//./defconfig" is passed last whereas I'd expect it would be first (since that should be the base config). This is causing problems, because config options that my config fragments are setting are getting overridden by the defconfig - it should be the other way around.

For reference, I'm using Rocko and have just updated to the latest commit. We have an in-tree defconfig, and we set KBUILD_DEFCONFIG_machinename appropriately. We are using the separate kernel-meta repository to store kernel metadata. I have KMACHINE_machinename set up so that it finds the correct BSP definition .scc file. Still seem to be missing something, though.

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