linux-kernel - Re: [PATCH 2/2] Enable 'make CONFIG

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Message-ID: <CACqU3MXozgu0kr-4w=bGejcEi8MrxH-PhKa0Ji0zrLu7ZEFomg@mail.gmail.com>
Date:	Wed, 10 Aug 2011 10:34:19 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	David Woodhouse <dwmw2@...radead.org>
Cc:	Michal Marek <mmarek@...e.cz>, "H. Peter Anvin" <hpa@...or.com>,
	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH 2/2] Enable 'make CONFIG_FOO=y oldconfig'

On Wed, Aug 10, 2011 at 10:17 AM, David Woodhouse <dwmw2@...radead.org> wrote:
> On Wed, 2011-08-10 at 10:15 -0400, Arnaud Lacombe wrote:
>>
>> hum, let's take a real life example: user foo wants his config to
>> enable CONFIG_WIRELESS_EXT, so with what you propose, he would do:
>>
>> # make CONFIG_WIRELESS_EXT=y allmodconfig
>>
>> currently, this would _never_ work, unless one of the symbol selected
>> by `allmodconfig' selects it, as WIRELESS_EXT is defined the
>> following:
>>
>> config WIRELESS_EXT
>>     bool
>>
>> I suspect there also an implicit dependency to WIRELESS.
>
> This is a complete red herring. It's *always* been like that, and works
> *just* like this for the 'all.config' file etc.
>
your point being ? I might as well tell you that I find the current
behavior of 'all*.config' just as broken wrt. to dependency
management.

> If you have nothing relevant to say, just don't say anything.
>
maybe you can come with a detailed description of your proposal's
behavior, including how to manage case like this, instead of just
throwing patch around ?

If I do:

# make CONFIG_WIRELESS_EXT=y allnoconfig

I expect either a success or an error, not a silent discard. And
*yes*, the problem already exists with "all*.config".

Thanks,
 - Arnaud
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