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Message-ID: <ZQm2W9r2a+cgeaEM@rli9-mobl>
Date:   Tue, 19 Sep 2023 22:55:23 +0800
From:   Philip Li <philip.li@...el.com>
To:     kernel test robot <lkp@...el.com>
CC:     Masahiro Yamada <masahiroy@...nel.org>, <llvm@...ts.linux.dev>,
        <oe-kbuild-all@...ts.linux.dev>, <linux-kernel@...r.kernel.org>,
        "Nathan Chancellor" <nathan@...nel.org>
Subject: Re: warning: unknown warning option '-Wrestrict'

On Tue, Sep 19, 2023 at 10:40:57PM +0800, kernel test robot wrote:
> tree:   https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git master
> head:   2cf0f715623872823a72e451243bbf555d10d032
> commit: feb843a469fb0ab00d2d23cfb9bcc379791011bb kbuild: add $(CLANG_FLAGS) to KBUILD_CPPFLAGS
> date:   4 months ago
> config: um-allnoconfig (https://download.01.org/0day-ci/archive/20230919/202309192257.IAbw1lnx-lkp@intel.com/config)
> compiler: clang version 17.0.0 (https://github.com/llvm/llvm-project.git 4a5ac14ee968ff0ad5d2cc1ffa0299048db4c88a)
> reproduce (this is a W=1 build): (https://download.01.org/0day-ci/archive/20230919/202309192257.IAbw1lnx-lkp@intel.com/reproduce)
> 
> If you fix the issue in a separate patch/commit (i.e. not just a new version of
> the same patch/commit), kindly add following tags
> | Reported-by: kernel test robot <lkp@...el.com>
> | Closes: https://lore.kernel.org/oe-kbuild-all/202309192257.IAbw1lnx-lkp@intel.com/
> 
> All warnings (new ones prefixed by >>):

Sorry for the false report. Kindly ignore this.

> 
> >> warning: unknown warning option '-Wrestrict' [-Wunknown-warning-option]
> >> warning: unknown warning option '-Wformat-overflow'; did you mean '-Wshift-overflow'? [-Wunknown-warning-option]
> >> warning: unknown warning option '-Wformat-truncation' [-Wunknown-warning-option]
> >> warning: unknown warning option '-Wstringop-overflow'; did you mean '-Wshift-overflow'? [-Wunknown-warning-option]
>    arch/x86/um/user-offsets.c:17:6: warning: no previous prototype for function 'foo' [-Wmissing-prototypes]
>       17 | void foo(void)
>          |      ^
>    arch/x86/um/user-offsets.c:17:1: note: declare 'static' if the function is not intended to be used outside of this translation unit
>       17 | void foo(void)
>          | ^
>          | static 
>    5 warnings generated.
>    error: unknown warning option '-Wrestrict' [-Werror,-Wunknown-warning-option]
>    error: unknown warning option '-Wformat-overflow'; did you mean '-Wshift-overflow'? [-Werror,-Wunknown-warning-option]
>    error: unknown warning option '-Wformat-truncation' [-Werror,-Wunknown-warning-option]
>    error: unknown warning option '-Wstringop-overflow'; did you mean '-Wshift-overflow'? [-Werror,-Wunknown-warning-option]
>    make[2]: *** [scripts/Makefile.build:252: scripts/mod/empty.o] Error 1
>    error: unknown warning option '-Wrestrict' [-Werror,-Wunknown-warning-option]
>    error: unknown warning option '-Wformat-overflow'; did you mean '-Wshift-overflow'? [-Werror,-Wunknown-warning-option]
>    error: unknown warning option '-Wformat-truncation' [-Werror,-Wunknown-warning-option]
>    error: unknown warning option '-Wstringop-overflow'; did you mean '-Wshift-overflow'? [-Werror,-Wunknown-warning-option]
>    make[2]: *** [scripts/Makefile.build:114: scripts/mod/devicetable-offsets.s] Error 1
>    make[2]: Target 'scripts/mod/' not remade because of errors.
>    make[1]: *** [Makefile:1286: prepare0] Error 2
>    make[1]: Target 'prepare' not remade because of errors.
>    make: *** [Makefile:226: __sub-make] Error 2
>    make: Target 'prepare' not remade because of errors.
> 
> -- 
> 0-DAY CI Kernel Test Service
> https://github.com/intel/lkp-tests/wiki
> 

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