[RFC PATCH] Kconfig: Enable Kconfig fragments to be used for defconfig

Grant Likely grant.likely at secretlab.ca
Sat Jul 17 06:17:05 EST 2010

On Fri, Jul 16, 2010 at 2:09 PM, Catalin Marinas
<catalin.marinas at arm.com> wrote:
> On Fri, 2010-07-16 at 19:46 +0100, Linus Torvalds wrote:
>> On Fri, Jul 16, 2010 at 11:40 AM, Nicolas Pitre <nico at fluxnic.net> wrote:
>> >
>> > DOH.
>> Well, it's possible that the correct approach is a mixture.
>> Automatically do the trivial cases (recursive selects, dependencies
>> that are simple or of the form "x && y" etc), and warn about the cases
>> that aren't trivial (where "not trivial" may not necessarily be about
>> fundamentally ambiguous ones, but just "complex enough that I won't
>> even try").
> There is still a risk with this approach when the Kconfig isn't entirely
> correct. For example, on ARM we have (I pushed a patch already):
> config CPU_32v6K
>        depends on CPU_V6
> config CPU_V7
>        select CPU_32v6K
> In this simple approach, we end up selecting CPU_V6 when we only need
> CPU_V7. There other places like this in the kernel.
> Of course, kbuild could still warn but if people rely on this feature to
> select options automatically I suspect they would ignore the warnings.

In my first patch, I made Kconfig problems errors instead of warnings.
 That would prevent people from ignoring them.


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