linux-kernel - Re: [ammarfaizi2-block:google/android/kernel/common/android-4.19-q-release 5202/7636] ld.lld: error: -plugin-opt=-: ld.lld: Unknown command line argument '-stack-alignment=8'. Try: 'ld.lld --help'

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Date:   Wed, 16 Mar 2022 09:52:31 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     kernel test robot <lkp@...el.com>
Cc:     Sami Tolvanen <samitolvanen@...gle.com>, llvm@...ts.linux.dev,
        kbuild-all@...ts.01.org,
        GNU/Weeb Mailing List <gwml@...r.gnuweeb.org>,
        linux-kernel@...r.kernel.org
Subject: Re:
 [ammarfaizi2-block:google/android/kernel/common/android-4.19-q-release
 5202/7636] ld.lld: error: -plugin-opt=-: ld.lld: Unknown command line
 argument '-stack-alignment=8'.  Try: 'ld.lld --help'

On Wed, Mar 16, 2022 at 08:30:29AM +0800, kernel test robot wrote:
> tree:   https://github.com/ammarfaizi2/linux-block google/android/kernel/common/android-4.19-q-release
> head:   1a3500dc59324a85c20f025cfa6485a1a0debbdf
> commit: 205cde74877d624ef7d24a6692e6e9337b19a541 [5202/7636] ANDROID: x86: add support for CONFIG_LTO_CLANG
> config: x86_64-randconfig-c007 (https://download.01.org/0day-ci/archive/20220316/202203160848.kydLIYip-lkp@intel.com/config)
> compiler: clang version 15.0.0 (https://github.com/llvm/llvm-project a6b2f50fb47da3baeee10b1906da6e30ac5d26ec)
> 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
>         # https://github.com/ammarfaizi2/linux-block/commit/205cde74877d624ef7d24a6692e6e9337b19a541
>         git remote add ammarfaizi2-block https://github.com/ammarfaizi2/linux-block
>         git fetch --no-tags ammarfaizi2-block google/android/kernel/common/android-4.19-q-release
>         git checkout 205cde74877d624ef7d24a6692e6e9337b19a541
>         # save the config file to linux build tree
>         mkdir build_dir
>         COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross W=1 O=build_dir ARCH=x86_64 SHELL=/bin/bash
> 
> 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 >>):
> 
> >> ld.lld: error: -plugin-opt=-: ld.lld: Unknown command line argument '-stack-alignment=8'.  Try: 'ld.lld --help'
>    ld.lld: Did you mean '--stackrealign=8'?
> --
>    lib/irq_regs.o: no symbols
> >> ld.lld: error: -plugin-opt=-: ld.lld: Unknown command line argument '-stack-alignment=8'.  Try: 'ld.lld --help'
>    ld.lld: Did you mean '--stackrealign=8'?

Already fixed:

https://android.googlesource.com/kernel/common/+/c1baa3321020cdd2ea9248d9b1ec512abf6f1c24

Bisecting an old tree with a new compiler is probably going to show
quite a few issues, given how often we have to add changes to the kernel
to get newer compilers to work.

Cheers,
Nathan