From: Nathan Chancellor <nathan@kernel.org>
To: Nick Desaulniers <ndesaulniers@google.com>
Cc: Masahiro Yamada <masahiroy@kernel.org>,
Michal Marek <michal.lkml@markovi.net>, Tom Rix <trix@redhat.com>,
linux-kbuild@vger.kernel.org, linux-kernel@vger.kernel.org,
llvm@lists.linux.dev, x86@kernel.org,
Dmitrii Bundin <dmitrii.bundin.a@gmail.com>,
Fangrui Song <maskray@google.com>,
Alexey Alexandrov <aalexand@google.com>,
Bill Wendling <morbo@google.com>,
Greg Thelen <gthelen@google.com>, Andi Kleen <ak@linux.intel.com>
Subject: Re: [PATCH v2 5/5] Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT
Date: Wed, 31 Aug 2022 13:23:00 -0700 [thread overview]
Message-ID: <Yw/DJLu10nw4aUDw@dev-arch.thelio-3990X> (raw)
In-Reply-To: <20220831184408.2778264-6-ndesaulniers@google.com>
On Wed, Aug 31, 2022 at 11:44:08AM -0700, Nick Desaulniers wrote:
> Dmitrii, Fangrui, and Mashahiro note:
>
> Before GCC 11 and Clang 12 -gsplit-dwarf implicitly uses -g2.
>
> Fix CONFIG_DEBUG_INFO_SPLIT for gcc-11+ & clang-12+ which now need -g
> specified in order for -gsplit-dwarf to work at all.
>
> -gsplit-dwarf has been mutually exclusive with -g since support for
> CONFIG_DEBUG_INFO_SPLIT was introduced in
> commit 866ced950bcd ("kbuild: Support split debug info v4")
> I don't think it ever needed to be.
>
> Link: https://lore.kernel.org/lkml/20220815013317.26121-1-dmitrii.bundin.a@gmail.com/
> Link: https://lore.kernel.org/lkml/CAK7LNARPAmsJD5XKAw7m_X2g7Fi-CAAsWDQiP7+ANBjkg7R7ng@mail.gmail.com/
> Link: https://reviews.llvm.org/D80391
> Cc: Andi Kleen <ak@linux.intel.com>
> Reported-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
> Reported-by: Fangrui Song <maskray@google.com>
> Reported-by: Masahiro Yamada <masahiroy@kernel.org>
> Suggested-by: Dmitrii Bundin <dmitrii.bundin.a@gmail.com>
> Signed-off-by: Nick Desaulniers <ndesaulniers@google.com>
Reviewed-by: Nathan Chancellor <nathan@kernel.org>
> ---
> Changes v1 -> v2:
> * Add reference to 866ced950bcd, cc Andi, in commit message.
>
> scripts/Makefile.debug | 6 ++----
> 1 file changed, 2 insertions(+), 4 deletions(-)
>
> diff --git a/scripts/Makefile.debug b/scripts/Makefile.debug
> index 46e88f0ca998..b6eb532af3cc 100644
> --- a/scripts/Makefile.debug
> +++ b/scripts/Makefile.debug
> @@ -1,10 +1,8 @@
> -DEBUG_CFLAGS :=
> +DEBUG_CFLAGS := -g
> +KBUILD_AFLAGS += -g
>
> ifdef CONFIG_DEBUG_INFO_SPLIT
> DEBUG_CFLAGS += -gsplit-dwarf
> -else
> -DEBUG_CFLAGS += -g
> -KBUILD_AFLAGS += -g
> endif
>
> ifdef CONFIG_DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
> --
> 2.37.2.672.g94769d06f0-goog
>
prev parent reply other threads:[~2022-08-31 20:23 UTC|newest]
Thread overview: 19+ messages / expand[flat|nested] mbox.gz Atom feed top
2022-08-31 18:44 [PATCH v2 0/5] fix debug info for asm and DEBUG_INFO_SPLIT Nick Desaulniers
2022-08-31 18:44 ` [PATCH v2 1/5] x86/boot/compressed: prefer cc-option for CFLAGS additions Nick Desaulniers
2022-08-31 19:41 ` Nathan Chancellor
2022-08-31 18:44 ` [PATCH v2 2/5] Makefile.compiler: Use KBUILD_AFLAGS for as-option Nick Desaulniers
2022-08-31 19:53 ` Nathan Chancellor
2022-09-05 9:09 ` Masahiro Yamada
2022-09-06 16:08 ` Nathan Chancellor
2022-09-07 4:14 ` Masahiro Yamada
2022-09-07 3:12 ` Nick Desaulniers
2022-09-07 4:27 ` Masahiro Yamada
2022-08-31 18:44 ` [PATCH v2 3/5] Makefile.compiler: replace cc-ifversion with compiler-specific macros Nick Desaulniers
2022-08-31 20:08 ` Nathan Chancellor
2022-09-05 6:44 ` Masahiro Yamada
2022-08-31 18:44 ` [PATCH v2 4/5] Makefile.debug: re-enable debug info for .S files Nick Desaulniers
2022-08-31 20:22 ` Nathan Chancellor
2022-09-05 7:49 ` Masahiro Yamada
2022-09-07 4:27 ` Nick Desaulniers
2022-08-31 18:44 ` [PATCH v2 5/5] Makefile.debug: set -g unconditional on CONFIG_DEBUG_INFO_SPLIT Nick Desaulniers
2022-08-31 20:23 ` Nathan Chancellor [this message]
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