netdev - Re: [net-next:master 488/665] verifier.c:undefined reference to `_

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Message-ID: <7d99f346-2e0b-05bb-b2ae-434647e2a299@sifive.com>
Date:   Mon, 13 Nov 2017 21:14:15 -0800
From:   Jim Wilson <jimw@...ive.com>
To:     Fengguang Wu <fengguang.wu@...el.com>,
        GCC Development <gcc@....gnu.org>
Cc:     Alexei Starovoitov <ast@...com>, netdev@...r.kernel.org,
        kbuild-all@...org
Subject: Re: [net-next:master 488/665] verifier.c:undefined reference to
 `__multi3'

On 11/11/2017 05:33 PM, Fengguang Wu wrote:
> CC gcc list. According to Alexei:
> 
>           This is a known issue with gcc 7 on mips that is "optimizing"
>           normal 64-bit multiply into 128-bit variant.
>           Nothing to fix on the kernel side.

I filed a bug report.  This is now
     https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82981

I found a helpful thread at
     https://www.linux-mips.org/archives/linux-mips/2017-08/msg00041.html
that had enough info for me to reproduce and file the bug report.

Jim