linux-kernel - Re: [UPDATE] gcc NULL strings passed from ternary operators in kernel modules

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Message-ID: <20110117085016.GG11358@cr0.nay.redhat.com>
Date:	Mon, 17 Jan 2011 16:50:16 +0800
From:	Américo Wang <xiyou.wangcong@...il.com>
To:	Jeffrey Merkey <jeffmerkey@...il.com>
Cc:	linux-kernel@...r.kernel.org
Subject: Re: [UPDATE] gcc NULL strings passed from ternary operators in
 kernel modules

On Thu, Jan 13, 2011 at 12:56:39AM -0700, Jeffrey Merkey wrote:
>might help if my examples are correct -- geez...
>
>interesting case with gcc.  The following code example:
>
>printk("%s\n", (value & 1) ? "set": "clear");
>
>will evaluate to NULL unless the ":" character has a space after
>static string declaration.
>
>this version
>
>printk("%s\n", (value & 1) ? "set" : "clear");
>
>works.
>
>go figure.   Looks like gcc assumes this case is a C++ construct of
>some sort and
>evaluates it to NULL.
>

Huh? How can gcc assume that is C++ code?!
Whitespaces definitely should not bother the code.

Which version of gcc are you using?

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