linux-kernel - Re: avr32 build failures in linux-next

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Date:	Sat, 6 Feb 2016 07:50:41 -0800
From:	Guenter Roeck <linux@...ck-us.net>
To:	Hans-Christian Noren Egtvedt <egtvedt@...fundet.no>,
	Sudip Mukherjee <sudipm.mukherjee@...il.com>
Cc:	Haavard Skinnemoen <hskinnemoen@...il.com>,
	"linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>
Subject: Re: avr32 build failures in linux-next

On 02/06/2016 03:57 AM, Hans-Christian Noren Egtvedt wrote:
> Around Fri 05 Feb 2016 22:02:12 +0530 or thereabout, Sudip Mukherjee wrote:
>> On Friday 05 February 2016 09:32 PM, Guenter Roeck wrote:
>>> Hi,
>>>
>>> I am getting persistent build failures with av32 in linux-next.
>>
>> me too.
>
> linux-next is Torvalds master branch?
>

No. We are talking about
git://git.kernel.org/pub/scm/linux/kernel/git/next/linux-next.git

>>> Example for avr32:defconfig:
>>>
>>> fs/built-in.o: In function `anon_inode_getfile':
>>> (.text+0x2ae90): relocation truncated to fit: R_AVR32_21S against
>>> `.text'+296c0
>>>
>>> All builds but avr32:allnoconfig fail with such truncated relocations.
>
> Weirdly I do not get this when I build torvalds/master with allnoconfig.
>
> The avr32 kernel was never very fond of CONFIG_CC_OPTIMIZE_FOR_SIZE=n, it
> was always built with CONFIG_CC_OPTIMIZE_FOR_SIZE=y for actual usage.
>
>>> Toolchain used is the old gcc 4.2.4 toolchain from kernel.org. I have been
>>> unable to find or build newer versions of gcc for avr32.
>>>
>>> Does anyone know if a more recent toolchain for avr32 is available ?
>>
>> https://sourceware.org/ml/crossgcc/2015-10/msg00050.html
>> says avr32 has been depreciated.
>
> Last release of avr32-linux GCC was the 4.2.4 patches in Buildroot for AVR32.
>
> Atmel never upstreamed the AVR32 patches for GCC.
>
>>> Another question is if the avr32 kernel still supported, or if I should
>>> just stop trying to build test it. Any thoughts ?
>>
>> I have already stopped building it.
>
> I build the kernel and try to fix small issues here and there.
>
> If it is too unstable for you in the test bench, feel free to remove it.
>

I'll keep building it for now, until it fails to build in mainline.

Guenter