linux-kernel - Re: REGRESSION: Re: [GIT] kconfig rc fixes

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Date:	Thu, 4 Nov 2010 14:32:07 -0400
From:	Arnaud Lacombe <lacombar@...il.com>
To:	Mauro Carvalho Chehab <mchehab@...hat.com>
Cc:	Randy Dunlap <randy.dunlap@...cle.com>,
	Michal Marek <mmarek@...e.cz>,
	Linus Torvalds <torvalds@...ux-foundation.org>,
	kyle@...hat.com, linux-kbuild@...r.kernel.org,
	linux-kernel@...r.kernel.org,
	Linux Media Mailing List <linux-media@...r.kernel.org>
Subject: Re: REGRESSION: Re: [GIT] kconfig rc fixes

Hi,

On Thu, Nov 4, 2010 at 2:11 PM, Mauro Carvalho Chehab
<mchehab@...hat.com> wrote:
> [...]
> Yes, but this makes things worse: it will allow compiling drivers that Kernel
> will never use, as they won't work without an I2C adapter, and the I2C adapter
> is not compiled.
>
> Worse than that: if you go into all V4L bridge drivers, that implements the I2C
> adapters and disable them, the I2C ancillary adapters will still be compiled
> (as they won't return to 'n'), but they will never ever be used...
>
> So, no, this is not a solution.
>
> What we need is to prompt the menu only if the user wants to do some manual configuration.
> Otherwise, just use the selects done by the drivers that implement the I2C bus adapters,
> and have some code to use those selected I2C devices.
>
These is an easy solution: doing as
`Documentation/kbuild/kconfig-language.txt' say it should be done:

config MODULES
        bool "modules ?"
        default y

config AUTO
        bool "AUTO"

config IVTV
        tristate "IVTV"
        select WM42 if AUTO

menu "TV"
        depends on !AUTO

config WM42_USER
        tristate "WM42"
        select WM42

endmenu

config WM42
        tristate
        default n

 - Arnaud
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