[OE-core] [PATCH][master-next] kernel: change default kconfig mode to olddefconfig

[Andre McCurdy]

On Mon, Oct 29, 2018 at 11:13 AM Bruce Ashfield
<bruce.ashfield at windriver.com> wrote:
>
> As was warned by commit 312ee68752fa ("kconfig: announce removal
> of oldnoconfig if used"), it has been removed from the 4.20 kernel.
>
> So we switch our default mode to the proper olddefconfig

Mentioning which kernel version first introduced olddefconfig would be
useful information here as kernels prior to that version will now fail
to build. It looks like the patch was first proposed sometime around
2012:

  https://patchwork.kernel.org/patch/1394011/

We may also need to either add a fallback to use oldnoconfig or bump
OLDEST_KERNEL (it's currently 3.2.0, which was released in early 2012
and so probably predates olddefconfig).

> Signed-off-by: Bruce Ashfield <bruce.ashfield at windriver.com>
> ---
>
> Not for the release, just wanted to get this in the queue for
> when master reopens so we'll be ready for 4.20+ kernel versions
>
> Bruce
>
>  meta/classes/kernel.bbclass | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
>
> diff --git a/meta/classes/kernel.bbclass b/meta/classes/kernel.bbclass
> index e04d2fe00434..d50f4a9ee822 100644
> --- a/meta/classes/kernel.bbclass
> +++ b/meta/classes/kernel.bbclass
> @@ -492,7 +492,7 @@ sysroot_stage_all () {
>         :
>  }
>
> -KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} CC="${KERNEL_CC}" O=${B} oldnoconfig"
> +KERNEL_CONFIG_COMMAND ?= "oe_runmake_call -C ${S} CC="${KERNEL_CC}" O=${B} olddefconfig"
>
>  python check_oldest_kernel() {
>      oldest_kernel = d.getVar('OLDEST_KERNEL')
> --
> 2.5.0
>
> --
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