linux-kernel - Re: [v4l-dvb-maintainer] [PATCH] Fix __ucmpdi2 in v4l2_norm_to

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Message-ID: <Pine.LNX.4.58.0701040357250.19252@shell4.speakeasy.net>
Date:	Thu, 4 Jan 2007 04:09:24 -0800 (PST)
From:	Trent Piepho <xyzzy@...akeasy.org>
To:	Stelian Pop <stelian@...ies.net>
cc:	Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
	Linus Torvalds <torvalds@...l.org>,
	v4l-dvb-maintainer@...uxtv.org, mchehab@...radead.org
Subject: Re: [v4l-dvb-maintainer] [PATCH] Fix __ucmpdi2 in v4l2_norm_to_name()

On Thu, 4 Jan 2007, Stelian Pop wrote:
> This patch replaces a switch statement using 64 bit values with the
> if/else equivalent in order to prevent a call __ucmpdi2 generated by
> some versions of gcc (verified with gcc-4.1.2 20060928):
>
> 	drivers/built-in.o: In function `v4l2_norm_to_name':
> 	(.text+0x71100): undefined reference to `__ucmpdi2'
>
> Signed-off-by: Stelian Pop <stelian@...ies.net>

It looks like there is a much better way to handle this problem here:
http://lkml.org/lkml/2006/12/17/46

Basically:
A. Fix gcc so it doesn't call in __ucmpdi2 (already fixed?)
B. Link in __ucmpdi2 from libgcc
C. Write arch specific code to provide __ucmpdi2
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