linux-kernel - Re: [PATCH v2] kconfig: autogenerated config_is

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Date:	Tue, 17 May 2011 16:45:10 +0200
From:	Michal Marek <mmarek@...e.cz>
To:	Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>
Cc:	linux-kernel@...r.kernel.org, linux-kbuild@...r.kernel.org
Subject: Re: [PATCH v2] kconfig: autogenerated config_is_xxx macro

On Fri, May 06, 2011 at 07:03:49AM +0200, Jean-Christophe PLAGNIOL-VILLARD wrote:
> this will allow to use to use
> 
> 	if(config_is_xxx())
> 	if(config_is_xxx_module())
> 
> in the code instead of
> 
> 	#ifdef CONFIG_xxx
> 	#ifdef CONFIG_xxx_MODULE
> 
> and now let the compiler remove the non usefull code and not the
> pre-processor
> 
> as done in the mach-types for arm as exmaple
> 
> Signed-off-by: Jean-Christophe PLAGNIOL-VILLARD <plagnioj@...osoft.com>

I pushed this to kbuild-2.6.git#kconfig, but I found an issue that needs
to be fixed before we start using this feature: scripts/basic/fixdep
scans source files for occurences of CONFIG_xxx and adds dependencies on
include/config/xxx. It needs to be taught to match  config_is_xxx as
well.

Michal
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