linux-kernel - Re: [2.6 patch] NF_CONNTRACK_H323 must depend on (IPV6 || IPV6=n)

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Message-ID: <20070129000011.GB6017@stusta.de>
Date:	Mon, 29 Jan 2007 01:00:11 +0100
From:	Adrian Bunk <bunk@...sta.de>
To:	David Miller <davem@...emloft.net>
Cc:	randy.dunlap@...cle.com, akpm@...l.org,
	linux-kernel@...r.kernel.org, netfilter@...ts.netfilter.org,
	netdev@...r.kernel.org
Subject: Re: [2.6 patch] NF_CONNTRACK_H323 must depend on (IPV6 || IPV6=n)

On Sun, Jan 28, 2007 at 03:53:48PM -0800, David Miller wrote:
> From: Adrian Bunk <bunk@...sta.de>
> Date: Sun, 28 Jan 2007 23:21:37 +0100
> 
> > On Sun, Jan 28, 2007 at 11:41:48AM -0800, Randy Dunlap wrote:
> > >...
> > > net/built-in.o: In function `q931_help':
> > > nf_conntrack_h323_main.c:(.text.q931_help+0x6ad): undefined reference to `ip6_route_output'
> > > nf_conntrack_h323_main.c:(.text.q931_help+0x6c3): undefined reference to `ip6_route_output'
> > >...
> > 
> > You didn't send your .config, but it seems you had CONFIG_IPV6=m and
> > CONFIG_NF_CONNTRACK_H323=y.
> > 
> > In this case, the untested patch below should fix it.
> > 
> > > ~Randy
> > 
> > cu
> > Adrian
> > 
> > 
> > <--  snip  -->
> > 
> > 
> > CONFIG_IPV6=m, CONFIG_NF_CONNTRACK_H323=y results in a compile error.
> > 
> > Fix this by letting NF_CONNTRACK_H323 depend on (IPV6 || IPV6=n).
> > 
> > Signed-off-by: Adrian Bunk <bunk@...sta.de>
> 
> Adrian is this the correct way to constrain the selection between
> "n" and "m" in this kind of situation?  I thought doing something
> like "depends on IPV6" is sufficient to achieve that?

"depends on IPV6" would fix the bug - but it would also make 
NF_CONNTRACK_H323 unavailable for all people without IPV6 support in 
their kernel.

cu
Adrian

-- 

       "Is there not promise of rain?" Ling Tan asked suddenly out
        of the darkness. There had been need of rain for many days.
       "Only a promise," Lao Er said.
                                       Pearl S. Buck - Dragon Seed

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