linux-kernel - Re: arch/riscv/kernel/vdso/vdso-syms.S:2: Error: junk at end of line, first unrecognized character is `@'

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Date:   Fri, 22 Jan 2021 00:08:02 -0700
From:   Nathan Chancellor <natechancellor@...il.com>
To:     kernel test robot <lkp@...el.com>
Cc:     Palmer Dabbelt <palmerdabbelt@...gle.com>, kbuild-all@...ts.01.org,
        clang-built-linux@...glegroups.com, linux-kernel@...r.kernel.org
Subject: Re: arch/riscv/kernel/vdso/vdso-syms.S:2: Error: junk at end of
 line, first unrecognized character is `@'

On Fri, Jan 22, 2021 at 09:41:35AM +0800, kernel test robot wrote:
> Hi Palmer,
> 
> First bad commit (maybe != root cause):
> 
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   9f29bd8b2e7132b409178d1367dae1813017bd0e
> commit: c2c81bb2f69138f902e1a58d3bef6ad97fb8a92c RISC-V: Fix the VDSO symbol generaton for binutils-2.35+
> date:   3 months ago
> config: riscv-randconfig-r002-20210122 (attached as .config)
> compiler: clang version 12.0.0 (https://github.com/llvm/llvm-project bd3a387ee76f58caa0d7901f3f84e9bb3d006f27)
> 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 riscv cross compiling tool for clang build
>         # apt-get install binutils-riscv64-linux-gnu
>         # https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=c2c81bb2f69138f902e1a58d3bef6ad97fb8a92c
>         git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>         git fetch --no-tags linus master
>         git checkout c2c81bb2f69138f902e1a58d3bef6ad97fb8a92c
>         # save the attached .config to linux build tree
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross ARCH=riscv 
> 
> If you fix the issue, kindly add following tag as appropriate
> Reported-by: kernel test robot <lkp@...el.com>
> 
> All errors (new ones prefixed by >>):
> 
>    arch/riscv/kernel/vdso/vdso-syms.S: Assembler messages:
> >> arch/riscv/kernel/vdso/vdso-syms.S:2: Error: junk at end of line, first unrecognized character is `@'
>    arch/riscv/kernel/vdso/vdso-syms.S:4: Error: junk at end of line, first unrecognized character is `@'
>    arch/riscv/kernel/vdso/vdso-syms.S:6: Error: junk at end of line, first unrecognized character is `@'
>    arch/riscv/kernel/vdso/vdso-syms.S:8: Error: junk at end of line, first unrecognized character is `@'
>    arch/riscv/kernel/vdso/vdso-syms.S:10: Error: junk at end of line, first unrecognized character is `@'
>    arch/riscv/kernel/vdso/vdso-syms.S:12: Error: junk at end of line, first unrecognized character is `@'
>    clang-12: error: assembler command failed with exit code 1 (use -v to see invocation)
> 
> ---
> 0-DAY CI Kernel Test Service, Intel Corporation
> https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

I believe this is https://github.com/ClangBuiltLinux/linux/issues/1266.

Cheers,
Nathan