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Subject: Re: Error: kernelrelease not valid - run 'make prepare' to update it
To:     Masahiro Yamada <masahiroy@kernel.org>
Cc:     kernel test robot <lkp@intel.com>,
        clang-built-linux <clang-built-linux@googlegroups.com>,
        kbuild-all@lists.01.org,
        Linux Kernel Mailing List <linux-kernel@vger.kernel.org>,
        Nathan Chancellor <nathan@kernel.org>
References: <202108111155.RvN9J3Hs-lkp@intel.com>
 <5ec75ad9-a861-4402-9c16-ae7cb0aaeaba@infradead.org>
 <CAK7LNATk21qWbgWORfmCLPD3Cieon-fwtuLtFhgOo1XORWJT6g@mail.gmail.com>
From:   Randy Dunlap <rdunlap@infradead.org>
Message-ID: <cd21ef08-1c4a-d039-d861-cd1c5e6eba02@infradead.org>
Date:   Fri, 13 Aug 2021 08:11:28 -0700
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On 8/13/21 3:18 AM, Masahiro Yamada wrote:
> On Wed, Aug 11, 2021 at 12:19 PM Randy Dunlap <rdunlap@infradead.org> wrote:
>>
>> On 8/10/21 8:16 PM, kernel test robot wrote:
>>> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
>>> head:   9e723c5380c6e14fb91a8b6950563d040674afdb
>>> commit: ba64beb17493a4bfec563100c86a462a15926f24 kbuild: check the minimum assembler version in Kconfig
>>> date:   4 months ago
>>> config: riscv-randconfig-r025-20210810 (attached as .config)
>>> compiler: clang version 14.0.0 (https://github.com/llvm/llvm-project d39ebdae674c8efc84ebe8dc32716ec353220530)
>>> 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://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/commit/?id=ba64beb17493a4bfec563100c86a462a15926f24
>>>           git remote add linus https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git
>>>           git fetch --no-tags linus master
>>>           git checkout ba64beb17493a4bfec563100c86a462a15926f24
>>>           # save the attached .config to linux build tree
>>>           mkdir build_dir
>>>           COMPILER_INSTALL_PATH=$HOME/0day COMPILER=clang make.cross O=build_dir ARCH=riscv prepare
>>>
>>> If you fix the issue, kindly add following tag as appropriate
>>> Reported-by: kernel test robot <lkp@intel.com>
>>>
>>> All errors (new ones prefixed by >>):
>>>
>>>>> Error: kernelrelease not valid - run 'make prepare' to update it
>>> --
>>>      clang --target=riscv64-linux-gnu -no-integrated-as --prefix=riscv64-linux-gnu- -Werror=unknown-warning-option: unknown assembler invoked
>>>      scripts/Kconfig.include:50: Sorry, this assembler is not supported.
>>>      make[3]: *** [scripts/kconfig/Makefile:63: syncconfig] Error 1
>>>      make[2]: *** [Makefile:617: syncconfig] Error 2
>>>      make[1]: *** [Makefile:726: include/config/auto.conf.cmd] Error 2
>>>      make[1]: Failed to remake makefile 'include/config/auto.conf.cmd'.
>>>      make[1]: Failed to remake makefile 'include/config/auto.conf'.
>>>>> Error: kernelrelease not valid - run 'make prepare' to update it
>>>      make[1]: Target 'prepare' not remade because of errors.
>>>      make: *** [Makefile:215: __sub-make] Error 2
>>>      make: Target 'prepare' not remade because of errors.
>>
>> Yes, I have noticed this one and a few other ('static') make targets that
>> should not need a .config file. I have a note to myself to ask about these,
>> so thanks for bringing it up.
> 
> 
> I think it is unrelated.
> 
> 
> 
> The 0-day bot has already shown the real reason
> of the error:
> 
>     clang --target=riscv64-linux-gnu -no-integrated-as
> --prefix=riscv64-linux-gnu- -Werror=unknown-warning-option: unknown
> assembler invoked
>     scripts/Kconfig.include:50: Sorry, this assembler is not supported.
> 
> 
> 
> 
> This happens when the proper toolchains are not found.
> 
> That is, make.cross passed CROSS_COMPILE=riscv64-linux-gnu-
> to the make command line, but riscv64-linux-gnu binutils
> are not installed on the system.
> 
> 
> 
> Without installing binutils-riscv64-linux-gnu,
> I can see a similar error log.

Hi,

Thanks for the detailed info. I get it.

-- 
~Randy