linux-kernel - Re: kbuild question

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Message-ID: <20070215223356.GA7880@uranus.ravnborg.org>
Date:	Thu, 15 Feb 2007 23:33:56 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Kumar Gala <galak@...nel.crashing.org>
Cc:	Linux Kernel list <linux-kernel@...r.kernel.org>
Subject: Re: kbuild question

On Thu, Feb 15, 2007 at 01:18:52PM -0600, Kumar Gala wrote:
> I was wondering if there was some way to make a Kconfig menu either  
> be just a menu or a choice depending on another bool being set or not.
> 
> What I'm trying to accomplish is if CONFIG_ONLY_HAVE_ONE is set I  
> want it so you can only select on option, however if  
> CONFIG_ONLY_HAVE_ONE is not set you should be able to select multiple  
> options.

You can do so using if.
See following example:
--------------------------------------------------------------
config ONLY_HAVE_ONE
	prompt "only have one?"
	boolean

if ONLY_HAVE_ONE
config FOO
	bool foo
	default y
endif

if !ONLY_HAVE_ONE
choice
	prompt "multiple values"
	default VAL_FIRST

config VAL_FIRST
	bool "First value"

config VAL_SECOND
	bool "Second value"
endchoice

endif
--------------------------------------------------------------

You should be able to modify this for the usage you ask for.

Hope this is useful,

	Sam
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