[yocto] Linux Yocto style kernel errors with no config fragments

[Bruce Ashfield]

On 14-06-12 09:46 AM, Alex J Lennon wrote:
> Hi,
>
> I was taking a quick look at converting the meta-raspberrypi kernel
> recipes to be linux-yocto style, to provide config frag support.
>
> I'm working with poky master, referencing linux-yocto-custom.bb in
> meta-skeleton
>
> This seems to be working as far as it goes, but I get an error when
> there are no configuration fragments supplied on the SRC_URI.
>
> | DEBUG: Executing shell function do_kernel_configme
> | [INFO] doing kernel configme
> | [INFO] Configuring target/machine combo: "standard/raspberrypi"
> | [INFO] collecting configs in ./.meta/meta-series
> | cat: .meta/cfg/standard/raspberrypi/config_frag.txt: No such file or
> directory
> | cat: .meta/cfg/standard/raspberrypi/config_frag.txt: No such file or
> directory
> | mv: cannot stat
> `[.....]/tmp/work/raspberrypi-poky-linux-gnueabi/linux-raspberrypi/3.12.21+gitcb53ea88f75180cc1ba74f7f197c8e3fd4f47cfe-r0/linux-raspberrypi-standard-build/.tmp.config*':
> No such file or directory
> | creation of pre-processed config data failed
> | config of "standard/raspberrypi" failed
>
> When I add an empty file://dummy.cfg file to the SRC_URI then I can
> build successfully.
>
> When I add a dummy option CONFIG_DUMMY=y into that fragment file
> do_kernel_configcheck correctly flags up that this is an unknown option
> for the kernel so it seems to be pulled in ok.
>
> Can anybody advise?

I have a fix for a similar issue in a patch queue that I'm going to
finish work on short (as part of 1.7 development work) .. the error
message that is generated in that scenario is certainly not much
help to anyone.

To see if this is the same issue, I'll ask a quick clarification
question.

 From what you describe .. when you see the message, do you also
have a defconfig on the SRC_URI ?

Bruce

>
> Thanks,
>
> Alex
>