linux-kernel - Re: RFC: kconfig select warnings bogus?

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Message-ID: <465034AA.6030904@s5r6.in-berlin.de>
Date:	Sun, 20 May 2007 13:44:42 +0200
From:	Stefan Richter <stefanr@...6.in-berlin.de>
To:	Trent Piepho <xyzzy@...akeasy.org>
CC:	Satyam Sharma <satyam.sharma@...il.com>,
	Adrian Bunk <bunk@...sta.de>,
	Andrew Morton <akpm@...ux-foundation.org>,
	Sam Ravnborg <sam@...nborg.org>,
	LKML <linux-kernel@...r.kernel.org>,
	Roman Zippel <zippel@...ux-m68k.org>,
	Kumar Gala <galak@...nel.crashing.org>,
	Simon Horman <horms@...ge.net.au>
Subject: Re: RFC: kconfig select warnings bogus?

Trent Piepho wrote:
> On Sun, 20 May 2007, Stefan Richter wrote:
>> Basically you replace
>>
>> 	A... depends on B
>>
>> by
>>
>> 	B... serves A
>>
>> The latter variant is a pain to maintain.  Dependencies change over
>> time, therefore we should note the dependency always at the dependent
>> option, not at the serving option.
> 
> The problem is that "B" will not exist on some architectures.  If you put the
> dependency with "A", the dependency still exists when "B" is gone.  If the
> dependency is with "B", it nicely goes away when "B" is gone.

If "make whateverconfig" works correctly,...

>> Iterating upwards and downwards the dependency graph is the duty of
>> "make snafuconfig", not of the maintainers.

...multi-level dependencies are no problem for it.

There is nothing wrong with

	A... depends on B

	B... depends on C

	# CONFIG_C is not set

-> A is unavailable.
-- 
Stefan Richter
-=====-=-=== -=-= =-=--
http://arcgraph.de/sr/
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