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

[Nicolas Pitre]

On Fri, 16 Jul 2010, Grant Likely wrote:

> 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.

ACK.


Nicolas