linux-kernel - Re: #ifdef CONFIG

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Message-Id: <20101026.082637.193705328.davem@davemloft.net>
Date:	Tue, 26 Oct 2010 08:26:37 -0700 (PDT)
From:	David Miller <davem@...emloft.net>
To:	elvis.dowson@....com
Cc:	linux-kernel@...r.kernel.org, luciano.coelho@...ia.com
Subject: Re: #ifdef CONFIG_ checks not working

From: Elvis Dowson <elvis.dowson@....com>
Date: Tue, 26 Oct 2010 18:28:22 +0400

> #ifdef CONFIG_WL1271
>     printk(KERN_INFO "%s: CONFIG_WL1271 detected\n", __func__);
> #else
>     printk(KERN_INFO "%s: CONFIG_WL1271 not detected\n", __func__);
> #endif

If you set WL1271=m then CONFIG_WL1271_MODULE will be set, not
CONFIG_WL1271.

The latter will only be set if you enable the option with "y".
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