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Date: Wed, 22 Jun 2005 20:12:07 +0200
From: DervishD <lkml@dervishd.net>
To: coywolf@lovecn.org
Cc: lkml <linux-kernel@vger.kernel.org>, sam@ravnborg.org
Subject: Re: [question] pass CONFIG_FOO to CC problem
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    Hi Coywolf :)

 * Coywolf Qi Hunt <coywolf@gmail.com> dixit:
> I was expecting kbuild passes CONFIG_FOO from .config to CC
> -DCONFIG_FOO, but it doesn't.  So I have to add
> 
> ifdef CONFIG_FOO
> EXTRA_CFLAGS += -DCONFIG_FOO
> endif

    NO! You don't do it that way in the kernel. Think: if you have to
pass a '-D' option for each config item you set, you will end up with
TONS of '-D' options, in fact you probably exceed the command line
size limit.

    You have to include <linux/config.h> if I recall correctly ;)

    Good luck!

    Raúl Núñez de Arenas Coronado

-- 
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