Re: kernel defconfig configuration

[Bruce Ashfield <bruce.ashfield@windriver.com>]

On 15-10-29 03:06 PM, Edward Wingate wrote:
> On Thu, Oct 29, 2015 at 6:10 AM, Bruce Ashfield
> <bruce.ashfield@windriver.com> wrote:
>> That's the kernel's configuration subsystem at play, it still has to
>> process the the defconfig (which was placed as .config before starting
>> the kernel build). Invalid options are removed, others are selected
>> by Kconfigs, etc. So what you end up with is the processed .config and
>> your old one in .config.old.
>
> Ah, OK, it's possible the option I wanted (CONFIG_REMOTEPROC) is not
> available for my machine (imx6/wandboard) and so removed.  Where can I
> look to see if a config option is valid for a particular
> machine/architecture?

I'm working on some patches that will show you that as part of the
configuration audit task (there's potentially a library I can
leverage) .. but for now, either looking at the Kconfig's or running
menuconfig are the best (brute force) way to find what is missing.

Bruce

>
> Thanks for the help.
>