From: Michael Ellerman <mpe@ellerman•id.au>
To: Nathan Chancellor <nathan@kernel•org>, masahiroy@kernel•org
Cc: nicolas@fjasle•eu, linux-kbuild@vger•kernel.org, trix@redhat•com,
llvm@lists•linux.dev, ndesaulniers@google•com, npiggin@gmail•com,
Nathan Chancellor <nathan@kernel•org>,
linuxppc-dev@lists•ozlabs.org
Subject: Re: [PATCH v2 06/14] powerpc/vdso: Remove unused '-s' flag from ASFLAGS
Date: Wed, 25 Jan 2023 15:12:24 +1100 [thread overview]
Message-ID: <87y1prp80n.fsf@mpe.ellerman.id.au> (raw)
In-Reply-To: <20221228-drop-qunused-arguments-v2-6-9adbddd20d86@kernel.org>
Nathan Chancellor <nathan@kernel•org> writes:
> When clang's -Qunused-arguments is dropped from KBUILD_CPPFLAGS, it
> warns:
>
> clang-16: error: argument unused during compilation: '-s' [-Werror,-Wunused-command-line-argument]
>
> The compiler's '-s' flag is a linking option (it is passed along to the
> linker directly), which means it does nothing when the linker is not
> invoked by the compiler. The kernel builds all .o files with '-c', which
> stops the compilation pipeline before linking, so '-s' can be safely
> dropped from ASFLAGS.
>
> Signed-off-by: Nathan Chancellor <nathan@kernel•org>
> Reviewed-by: Nick Desaulniers <ndesaulniers@google•com>
> Reviewed-by: Segher Boessenkool <segher@kernel•crashing.org>
> ---
> Cc: mpe@ellerman•id.au
Acked-by: Michael Ellerman <mpe@ellerman•id.au> (powerpc)
cheers
next prev parent reply other threads:[~2023-01-25 4:13 UTC|newest]
Thread overview: 23+ messages / expand[flat|nested] mbox.gz Atom feed top
2023-01-12 3:04 [PATCH v2 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Nathan Chancellor
2023-01-12 3:05 ` [PATCH v2 05/14] powerpc: Remove linker flag from KBUILD_AFLAGS Nathan Chancellor
2023-01-25 4:11 ` Michael Ellerman
2023-01-26 1:29 ` Masahiro Yamada
2023-01-26 2:07 ` Nathan Chancellor
2023-01-26 4:22 ` Masahiro Yamada
2023-01-26 10:05 ` Michael Ellerman
2023-01-12 3:05 ` [PATCH v2 06/14] powerpc/vdso: Remove unused '-s' flag from ASFLAGS Nathan Chancellor
2023-01-25 4:12 ` Michael Ellerman [this message]
2023-01-12 3:05 ` [PATCH v2 07/14] powerpc/vdso: Improve linker flags Nathan Chancellor
2023-01-12 18:02 ` Sedat Dilek
2023-01-12 18:21 ` Nathan Chancellor
2023-01-12 18:47 ` Sedat Dilek
2023-01-22 17:27 ` Masahiro Yamada
2023-01-22 18:01 ` Nathan Chancellor
2023-01-23 15:07 ` Segher Boessenkool
2023-01-24 16:14 ` Nathan Chancellor
2023-01-24 16:30 ` Segher Boessenkool
2023-01-12 3:05 ` [PATCH v2 08/14] powerpc/vdso: Remove an unsupported flag from vgettimeofday-32.o with clang Nathan Chancellor
2023-01-22 17:28 ` [PATCH v2 00/14] Remove clang's -Qunused-arguments from KBUILD_CPPFLAGS Masahiro Yamada
2023-01-23 13:58 ` Naresh Kamboju
2023-01-23 16:11 ` Nathan Chancellor
2023-01-24 15:29 ` Naresh Kamboju
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