linux-kernel - Re: nds32 build failures

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Message-ID: <CAK8P3a1xDCS1X-4UETB5WW5txD38hrRUGKAfqU=SUy93o3DH5g@mail.gmail.com>
Date:   Thu, 10 May 2018 22:40:20 -0400
From:   Arnd Bergmann <arnd@...db.de>
To:     Greentime Hu <green.hu@...il.com>
Cc:     Guenter Roeck <private@...ck-us.net>,
        "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 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?

          Arnd