linux-kernel - Re: [PATCH 2/2] Makefile: Only specify '--prefix=' when building with clang + GNU as

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Date:   Thu, 30 Sep 2021 03:32:09 +0800
From:   kernel test robot <lkp@...el.com>
To:     Nathan Chancellor <nathan@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Michal Marek <michal.lkml@...kovi.net>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        clang-built-linux@...glegroups.com,
        Nathan Chancellor <nathan@...nel.org>
Subject: Re: [PATCH 2/2] Makefile: Only specify '--prefix=' when building
 with clang + GNU as

Hi Nathan,

I love your patch! Perhaps something to improve:

[auto build test WARNING on 7a7fd0de4a9804299793e564a555a49c1fc924cb]

url:    https://github.com/0day-ci/linux/commits/Nathan-Chancellor/Makefile-Remove-gcc-toolchain-flag/20210929-112213
base:   7a7fd0de4a9804299793e564a555a49c1fc924cb
config: x86_64-randconfig-a011-20210929 (attached as .config)
compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project dc6e8dfdfe7efecfda318d43a06fae18b40eb498)
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/0day-ci/linux/commit/74a168f9e88d9edf5aaa8209d2c39e676de2857a
        git remote add linux-review https://github.com/0day-ci/linux
        git fetch --no-tags linux-review Nathan-Chancellor/Makefile-Remove-gcc-toolchain-flag/20210929-112213
        git checkout 74a168f9e88d9edf5aaa8209d2c39e676de2857a
        # save the attached .config 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 arch/x86/

If you fix the issue, kindly add following tag as appropriate
Reported-by: kernel test robot <lkp@...el.com>

All warnings (new ones prefixed by >>):

>> arch/x86/platform/pvh/head.S:22:2: warning: DWARF2 only supports one section per compilation unit
    .section ".head.text","ax"
    ^


vim +22 arch/x86/platform/pvh/head.S

7243b93345f7f8d arch/x86/xen/xen-pvh.S Boris Ostrovsky 2017-02-05  21  
7243b93345f7f8d arch/x86/xen/xen-pvh.S Boris Ostrovsky 2017-02-05 @22  	__HEAD
7243b93345f7f8d arch/x86/xen/xen-pvh.S Boris Ostrovsky 2017-02-05  23  

---
0-DAY CI Kernel Test Service, Intel Corporation
https://lists.01.org/hyperkitty/list/kbuild-all@lists.01.org

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