From: Ismail Donmez <ismail@pardus.org.tr>
Organization: =?utf-8?q?T=C3=9CB=C4=B0TAK/UEKAE?=
To: Kyle Moffett <mrmacman_g4@mac.com>
Subject: Re: __STRICT_ANSI__ checks in headers
Date: Sun, 1 Oct 2006 10:34:56 +0300
User-Agent: KMail/1.9.4
Cc: Andrew Morton <akpm@osdl.org>, David Woodhouse <dwmw2@infradead.org>,
       LKML <linux-kernel@vger.kernel.org>, mchehab@infradead.org
References: <200609150901.33644.ismail@pardus.org.tr> <20060930215343.548f5cd9.akpm@osdl.org> <110413A1-7699-4DDB-9997-C3DA9E9DDB46@mac.com>
In-Reply-To: <110413A1-7699-4DDB-9997-C3DA9E9DDB46@mac.com>
MIME-Version: 1.0
Content-Type: text/plain;
  charset="utf-8"
Content-Transfer-Encoding: 7bit
Content-Disposition: inline
Message-Id: <200610011034.57158.ismail@pardus.org.tr>
Sender: linux-kernel-owner@vger.kernel.org
Content-Length: 1761
Lines: 44

On Sunday 01 October 2006 08:20, Kyle Moffett wrote:
> On Oct 01, 2006, at 00:53:43, Andrew Morton wrote:
[...]
> > Bisection shows that this patch causes these depmod warnings:
> >
> > WARNING: "snd_card_disconnect" [sound/usb/usx2y/snd-usb-usx2y.ko]
> > has no CRC!
> > [etc]
> >
> > I don't know why that would happen.
> >
> > From: Ismail Donmez <ismail@pardus.org.tr>
> >
> > __STRICT_ANSI__ usage in types.h header results in compile errors
> > for some userspace packages[1] when used with gcc -ansi flag.  With
> > the suggestion of Kyle Moffett I replace strict ansi checks with
> > __extension__ to tell gcc not to error or warn on gcc extensions.
> > Compile tested on x86 with 2.6.18.
>
> Best guess:  Depmod does some kind of funny type-based expansion and
> hashing of the symbols which doesn't understand the "__extension__"
> keyword.  Probably the simplest thing to do is to add "-
> D__extension__=" to the depmod preprocessing flags.  Alternatively
> you could teach depmod to completely ignore the __extension__ keyword
> when it shows up in the sources, but the former seems like it would
> be much simpler.
>
> Just thinking about it we probably also need to educate sparse about
> __extension__ too.  Perhaps somebody could also add an sparse flag to
> make it warn about nonportable constructs in exported header files.
>
> I'd submit a patch but my knowledge of kernel makefiles and depmod is
> somewhere between zero and none, exclusive.

Thanks, I will have a look at it.

Regards,
ismail

-
To unsubscribe from this list: send the line "unsubscribe linux-kernel" in
the body of a message to majordomo@vger.kernel.org
More majordomo info at  http://vger.kernel.org/majordomo-info.html
Please read the FAQ at  http://www.tux.org/lkml/