linux-kernel - Re: kconfig - a suggestion how to fix the select issue

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Date:	Sun, 4 May 2008 11:11:45 +0300
From:	Adrian Bunk <bunk@...nel.org>
To:	Sam Ravnborg <sam@...nborg.org>
Cc:	Roman Zippel <zippel@...ux-m68k.org>,
	linux-kbuild <linux-kbuild@...r.kernel.org>,
	LKML <linux-kernel@...r.kernel.org>
Subject: Re: kconfig - a suggestion how to fix the select issue

On Sun, May 04, 2008 at 09:10:41AM +0200, Sam Ravnborg wrote:
>...
> 
> config A
>         bool "a"
> 
> config B
>         bool "b"
>         depends on A
> 
> config C
>         bool "c"
>         require B
> 
> The require dependency will have impact on visibility.
> C shall only be visible if all symbols it require are
> visible. Note that visible does not imply 'chosen'.
> In this case C would be visible when A is chosen.
> 
> When the user then choose C and B is not chosen 
> then the user is prompted to choose B.
> 
> So user has to chose B in order to have C chosen.
>...
> Comments?


Given:

config A
	tristate "a"

config B
	tristate "b"
	depends on A

config C
	bool "c"
	require B

CONFIG_A=m


Will C be visible?


The underlying problem is that we use bool for two different cases:
- non-modular driver (answer would be "no")
- enable feature in driver (answer would be "depends on the value of D")


> 	Sam

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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