linux-kernel - [esmil:visionfive 1/42] arch/riscv/lib/string.c:90:7: error: redefinition of '_

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Message-ID: <202209090127.x1z9vvlp-lkp@intel.com>
Date:   Fri, 9 Sep 2022 01:34:21 +0800
From:   kernel test robot <lkp@...el.com>
To:     Matteo Croce <mcroce@...rosoft.com>
Cc:     llvm@...ts.linux.dev, kbuild-all@...ts.01.org,
        linux-kernel@...r.kernel.org,
        Emil Renner Berthing <kernel@...il.dk>
Subject: [esmil:visionfive 1/42] arch/riscv/lib/string.c:90:7: error:
 redefinition of '__memcpy'

tree:   https://github.com/esmil/linux visionfive
head:   044c1f5e968de7d30940431fbb90da599074ea1c
commit: c247f6e6c7ba6abb92177ba2a742f60a3244d6d2 [1/42] riscv: optimized memcpy
config: riscv-randconfig-r021-20220907 (https://download.01.org/0day-ci/archive/20220909/202209090127.x1z9vvlp-lkp@intel.com/config)
compiler: clang version 16.0.0 (https://github.com/llvm/llvm-project 1546df49f5a6d09df78f569e4137ddb365a3e827)
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://github.com/esmil/linux/commit/c247f6e6c7ba6abb92177ba2a742f60a3244d6d2
        git remote add esmil https://github.com/esmil/linux
        git fetch --no-tags esmil visionfive
        git checkout c247f6e6c7ba6abb92177ba2a742f60a3244d6d2
        # 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=riscv SHELL=/bin/bash arch/riscv/

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

All error/warnings (new ones prefixed by >>):

>> arch/riscv/lib/string.c:90:57: warning: attribute declaration must precede definition [-Wignored-attributes]
   void *memcpy(void *dest, const void *src, size_t count) __weak __alias(__memcpy);
                                                           ^
   include/linux/compiler_attributes.h:372:56: note: expanded from macro '__weak'
   #define __weak                          __attribute__((__weak__))
                                                          ^
   arch/riscv/lib/string.c:31:7: note: previous definition is here
   void *__memcpy(void *dest, const void *src, size_t count)
         ^
>> arch/riscv/lib/string.c:90:7: error: redefinition of '__memcpy'
   void *memcpy(void *dest, const void *src, size_t count) __weak __alias(__memcpy);
         ^
   arch/riscv/include/asm/string.h:25:31: note: expanded from macro 'memcpy'
   #define memcpy(dst, src, len) __memcpy(dst, src, len)
                                 ^
   arch/riscv/lib/string.c:31:7: note: previous definition is here
   void *__memcpy(void *dest, const void *src, size_t count)
         ^
   1 warning and 1 error generated.


vim +/__memcpy +90 arch/riscv/lib/string.c

    89	
  > 90	void *memcpy(void *dest, const void *src, size_t count) __weak __alias(__memcpy);

-- 
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https://01.org/lkp