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Date:	Fri, 22 Feb 2008 19:27:37 +0100
From:	Sam Ravnborg <sam@...nborg.org>
To:	Randy Dunlap <randy.dunlap@...cle.com>
Cc:	Nish Aravamudan <nish.aravamudan@...il.com>,
	Len Brown <lenb@...nel.org>,
	Kamalesh Babulal <kamalesh@...ux.vnet.ibm.com>,
	Andrew Morton <akpm@...ux-foundation.org>,
	linux-kernel@...r.kernel.org, linux-acpi@...r.kernel.org,
	Andy Whitcroft <apw@...dowen.org>
Subject: Re: [BUILD_FAILURE] 2.6.25-rc2-mm1 - Build Failure at acpi_os

> 
> Is there a way to generate (in Kconfig language) the boolean
> CONFIG_ACPI_CUSTOM_DSDT based on whether CONFIG_ACPI_CUSTOM_DSDT_FILE
> == "" or != "" ?  I tried to muck around with that last night but
> couldn't get it to work.  I.e., just present the ACPI_CUSTOM_DSDT_FILE
> config symbol to the user and then generate the ACPI_CUSTOM_DSDT bool
> based on the string value.

Something following this example?

config STRING
        string
        prompt "What string"
        default ""

config STRING_IS_NOT_EMPTY
        bool
        default STRING != ""


But that seems too easy - were you trying to do something
more complex than this?

	Sam
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