linux-kernel - Re: nds32 build failures

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Date:   Thu, 10 May 2018 21:31:46 -0700
From:   Guenter Roeck <private@...ck-us.net>
To:     Arnd Bergmann <arnd@...db.de>, Greentime Hu <green.hu@...il.com>
Cc:     "linux-kernel@...r.kernel.org" <linux-kernel@...r.kernel.org>,
        Vincent Chen <vincentc@...estech.com>,
        Greentime Hu <greentime@...estech.com>, kito.cheng@...il.com,
        wuiw@...estech.com
Subject: Re: nds32 build failures

On 05/10/2018 07:40 PM, Arnd Bergmann wrote:
> On Wed, Apr 18, 2018 at 3:19 AM, Greentime Hu <green.hu@...il.com> wrote:
>> 2018-04-17 20:47 GMT+08:00 Arnd Bergmann <arnd@...db.de>:
>>> On Mon, Apr 16, 2018 at 11:06 AM, Greentime Hu <green.hu@...il.com> wrote:
>>>> 2018-04-16 11:58 GMT+08:00 Guenter Roeck <private@...ck-us.net>:
>>>>
>>>> This built failure is because the toolchain version you used is not
>>>> supported the latest intrinsic function/macro.
>>>> We are sending the latest patchset now and we expect the whole new
>>>> features will be supported in gcc8.0.0 and binutil2.31+.
>>>>
>>>> If you'd like to get these new features of toolchain, you may use the
>>>> github version.
>>>> This is the built-script repo. https://github.com/andestech/build_script.git
>>> I've taken the gcc-6.3 sources from there, and updated them to gcc-6.4.0
>>> in order to build a nds32le-linux toolchain based on the same version as
>>> the other ones.
>>>
>>> Unfortunately neither the usual binutils-2.29.1 nor your binutils worked
>>> for me, but I eventually managed to get a build using the binutils-2.30
>>> release.
>>>
>>> With this, I could build a mainline kernel with a couple of warnings,
>>> but an 'allmodconfig' build still failed.
>>>
>>> Guenter, can you try my binary from
>>> www.kernel.org/pub/tools/crosstool/files/bin/x86_64/6.4.0/x86_64-gcc-6.4.0-nolibc-nds32le-linux.tar.xz
>>> ?
>>>
>>> If that works for you, I'll update the front-page and remove the nds32-elf
>>> toolchains.
>>>
>>> Greentime, do you have a patch set for gcc-7.3 as well, or are 6.3 and 8.0 the
>>> only working compilers for nds32le-linux?
>>>
>> Hi, all:
>>
>> I just discuss with our toolchain colleagues. We have only gcc6.3 and
>> gcc8.0 for nds32le-linux.
>> I have the ld segmentation fault issue too when building kernel with
>> 'allmodconfig'. We are dealing with it.
> I've tried building the mainline gcc-8.1 sources for nds32le-linux and
> still got a failure with those (building gcc), building a nds32le-elf gcc-8.1.0
> worked fine, but that fails to build the vdso (no support for -fPIC), so
> it's again unusable for building kernels. Any other ideas?
FWIW, nds32 in linux-next doesn't build for me at all, at least not with
nds32le-linux-gcc (GCC) 6.4.0 from kernel.org. I have not tried any
other versions.

Guenter