linux-kernel - Re: ld.lld: error: undefined symbol: _

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Date:   Thu, 1 Dec 2022 09:16:10 +0100
From:   Miquel Raynal <miquel.raynal@...tlin.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Mikhail Zhilkin <csharper2005@...il.com>, llvm@...ts.linux.dev,
        oe-kbuild-all@...ts.linux.dev, linux-kernel@...r.kernel.org,
        NOGUCHI Hiroshi <drvlabo@...il.com>
Subject: Re: ld.lld: error: undefined symbol: __udivdi3

Hi Mikhail, Hiroshi,

lkp@...el.com wrote on Thu, 1 Dec 2022 01:46:36 +0800:

> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   01f856ae6d0ca5ad0505b79bf2d22d7ca439b2a1
> commit: 9b78ef0c7997052e9eaa0f7a4513d546fa17358c mtd: parsers: add support for Sercomm partitions
> date:   6 months ago
> config: mips-randconfig-r033-20221128
> compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 6e4cea55f0d1104408b26ac574566a0e4de48036)
> 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
>         # install mips cross compiling tool for clang build
>         # apt-get install binutils-mipsel-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=9b78ef0c7997052e9eaa0f7a4513d546fa17358c
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout 9b78ef0c7997052e9eaa0f7a4513d546fa17358c
>         # save the config file
>         mkdir build_dir && cp config build_dir/.config
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=mips SHELL=/bin/bash
> 
> If you fix the issue, kindly add following tag where applicable
> | Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
> >> ld.lld: error: undefined symbol: __udivdi3  
>    >>> referenced by scpart.c
>    >>>               mtd/parsers/scpart.o:(scpart_parse) in archive drivers/built-in.a  
> 

Can you please try to reproduce this with a mips toolchain as advised
and send a fix?

Thanks,
Miquèl