Re: kbuild question

[Roman Zippel <zippel@linux-m68k.org>]

Hi,

On Fri, 16 Feb 2007, Kumar Gala wrote:

> > Could you please be more specific about the problem you're trying to
> > solve, instead of how you're trying to solve it?
> > A real example would help a lot to understand the actual problem.
> 
> Sure, on powerpc for some of the embedded sub-architectures you can only
> select a single board to build for.  For a lot of people this is sufficient,
> however we are moving towards a world where you can easily build in support
> for multiple boards into a single kernel.
> 
> I'd like to have it such that if I'm only building support for one board
> (CONFIG_ONLY_HAVE_ONE, not going to call it that, but for this discussion its
> sufficient), you get a choice menu from Kconfig enforcing the ability to only
> select one board.  However if !CONFIG_ONLY_HAVE_ONE than you can select
> multiple boards to build into your kernel.
> 
> if CONFIG_ONLY_HAVE_ONE is set we can optimize out the runtime checks that get
> added for handling the multiple board case.

On m68k we have the same problem, but what I'm what I'm considering is to 
add a new mode for choice groups - at least one must be selected and 
kconfig generates the extra information if only one is selected.

bye, Roman
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