linux-kernel - Re: net/tipc/udp_media.c:743: undefined reference to `ipv6_dev

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Date:   Thu, 13 Aug 2020 21:21:46 -0700
From:   Randy Dunlap <rdunlap@...radead.org>
To:     Xin Long <lucien.xin@...il.com>, kernel test robot <lkp@...el.com>
Cc:     kbuild-all@...ts.01.org, LKML <linux-kernel@...r.kernel.org>
Subject: Re: net/tipc/udp_media.c:743: undefined reference to `ipv6_dev_find'

On 8/13/20 2:35 AM, Xin Long wrote:
> On Wed, Aug 12, 2020 at 7:21 AM kernel test robot <lkp@...el.com> wrote:
>>
>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>> head:   c636eef2ee3696f261a35f34989842701a107895
>> commit: 5a6f6f579178dbeb33002d93b4f646c31348fac9 tipc: set ub->ifindex for local ipv6 address
>> date:   6 days ago
>> config: ia64-randconfig-r005-20200811 (attached as .config)
>> compiler: ia64-linux-gcc (GCC) 9.3.0
>> reproduce (this is a W=1 build):
>>         wget https://raw.githubusercontent.com/intel/lkp-tests/master/sbin/make.cross -O ~/bin/make.cross
>>         chmod +x ~/bin/make.cross
>>         git checkout 5a6f6f579178dbeb33002d93b4f646c31348fac9
>>         # save the attached .config to linux build tree
>>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=gcc-9.3.0 make.cross ARCH=ia64
>>
>> If you fix the issue, kindly add following tag as appropriate
>> Reported-by: kernel test robot <lkp@...el.com>
>>
>> All errors (new ones prefixed by >>):
>>
>>    ia64-linux-ld: net/tipc/udp_media.o: in function `tipc_udp_enable':
>>>> net/tipc/udp_media.c:743: undefined reference to `ipv6_dev_find'
> To use some APIs exported from ipv6 code.
> We need add this:
> 
> --- a/net/tipc/Kconfig
> +++ b/net/tipc/Kconfig
> @@ -6,6 +6,7 @@
>  menuconfig TIPC
>         tristate "The TIPC Protocol"
>         depends on INET
> +       depends on IPV6 || IPV6=n
> 

Thanks. Works for me.

Acked-by: Randy Dunlap <rdunlap@...radead.org> # build-tested

Please make a proper patch and send it to the maintainers.
-- 
~Randy