linux-kernel - Re: [PATCH] Makefile: Don't try to add '-fcatch-undefined-behavior' flag

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Message-ID: <CAK7LNASsm9wrL5JkpVpp0qm5jBd22sHukqYe_iJGJXe0RO8ECg@mail.gmail.com>
Date:   Mon, 13 May 2019 11:23:10 +0900
From:   Masahiro Yamada <yamada.masahiro@...ionext.com>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Michal Marek <michal.lkml@...kovi.net>,
        Linux Kbuild mailing list <linux-kbuild@...r.kernel.org>,
        Linux Kernel Mailing List <linux-kernel@...r.kernel.org>,
        clang-built-linux <clang-built-linux@...glegroups.com>,
        Nick Desaulniers <ndesaulniers@...gle.com>,
        Arnd Bergmann <arnd@...db.de>
Subject: Re: [PATCH] Makefile: Don't try to add '-fcatch-undefined-behavior' flag

On Thu, May 9, 2019 at 8:49 PM Nathan Chancellor
<natechancellor@...il.com> wrote:
>
> This is no longer a valid option in clang, it was removed in 3.5, which
> we don't support.
>
> https://github.com/llvm/llvm-project/commit/cb3f812b6b9fab8f3b41414f24e90222170417b4
>
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>
> ---
>
> Let me know if you want this incremental to your patch. I figured it
> made more sense to remove this then do the cc-option/cc-disable-warning
> removal because it will simplify the commit message.

Applied to linux-kbuild.
Thanks.


>  Makefile | 1 -
>  1 file changed, 1 deletion(-)
>
> diff --git a/Makefile b/Makefile
> index d24f5a8009ee..e4788eb2c9b9 100644
> --- a/Makefile
> +++ b/Makefile
> @@ -740,7 +740,6 @@ KBUILD_CFLAGS += $(call cc-disable-warning, tautological-compare)
>  # source of a reference will be _MergedGlobals and not on of the whitelisted names.
>  # See modpost pattern 2
>  KBUILD_CFLAGS += $(call cc-option, -mno-global-merge,)
> -KBUILD_CFLAGS += $(call cc-option, -fcatch-undefined-behavior)
>  else
>
>  # These warnings generated too much noise in a regular build.
> --
> 2.21.0
>


-- 
Best Regards
Masahiro Yamada