linux-kernel - Re: Fwd: Using select in boolean dependents of a tristate symbol

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Date:	Wed, 26 Jul 2006 21:05:35 -0400
From:	Dmitry Torokhov <dtor@...ightbb.com>
To:	Roman Zippel <zippel@...ux-m68k.org>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: Fwd: Using select in boolean dependents of a tristate symbol

On Wednesday 26 July 2006 20:42, Roman Zippel wrote:
> Hi,
> 
> On Wed, 19 Jul 2006, Dmitry Torokhov wrote:
> 
> > Another question for you  - what is the best way to describe
> > dependancy of a sub-option on a subsystem so you won't end up with the
> > subsystem as a module and user built in. Something like
> > 
> > config IBM_ASM
> >        tristate "Device driver for IBM RSA service processor"
> >        depends on X86 && PCI && EXPERIMENTAL
> > ...
> > config IBM_ASM_INPUT
> >        bool "Support for remote keyboard/mouse"
> >        depends on IBM_ASM && (INPUT=y || INPUT=IMB_ASM)
> > 
> > But the above feels yucky. Could we have something like:
> > 
> >         depends on matching(INPUT, IBM_ASM)
> 
> This is not really descriptive of what it does, is it?
> Linus suggested a syntax like (IBM_ASM && IMB_ASM<=INPUT)
> Another alternative which works now is to just disable the one invalid 
> case explicitely:
> 
> 	depends on IBM_ASM && INPUT
> 	depends on !(IBM_ASM=y && INPUT=m)
>

OK, then I'll be disabling invalid cases explicitly for now.

Thank you Roman.

-- 
Dmitry
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