linux-kernel - Re: [PATCH 1/3] Kconfig.debug: simplify the dependency of DEBUG_INFO

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Date:   Mon, 3 Oct 2022 09:53:13 -0700
From:   Nick Desaulniers <ndesaulniers@...gle.com>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nathan Chancellor <nathan@...nel.org>
Subject: Re: [PATCH 1/3] Kconfig.debug: simplify the dependency of DEBUG_INFO_DWARF4/5

On Sun, Oct 2, 2022 at 11:11 AM Masahiro Yamada <masahiroy@...nel.org> wrote:
>
> Commit c0a5c81ca9be ("Kconfig.debug: drop GCC 5+ version check for
> DWARF5") could have cleaned up the code a bit deeper.
>
> "CC_IS_CLANG &&" is unneeded. No functional change is intended.

This implies that there are only 2 compilers capable of building the
kernel; consider also removing
include/linux/compiler-intel.h
if ICC is no longer supported.  Otherwise, what implications does this
patch have for ICC?

>
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
>
>  lib/Kconfig.debug | 4 ++--
>  1 file changed, 2 insertions(+), 2 deletions(-)
>
> diff --git a/lib/Kconfig.debug b/lib/Kconfig.debug
> index d3e5f36bb01e..f4b2165f24db 100644
> --- a/lib/Kconfig.debug
> +++ b/lib/Kconfig.debug
> @@ -264,7 +264,7 @@ config DEBUG_INFO_DWARF_TOOLCHAIN_DEFAULT
>  config DEBUG_INFO_DWARF4
>         bool "Generate DWARF Version 4 debuginfo"
>         select DEBUG_INFO
> -       depends on !CC_IS_CLANG || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)))
> +       depends on !CC_IS_CLANG || AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)
>         help
>           Generate DWARF v4 debug info. This requires gcc 4.5+, binutils 2.35.2
>           if using clang without clang's integrated assembler, and gdb 7.0+.
> @@ -276,7 +276,7 @@ config DEBUG_INFO_DWARF4
>  config DEBUG_INFO_DWARF5
>         bool "Generate DWARF Version 5 debuginfo"
>         select DEBUG_INFO
> -       depends on !CC_IS_CLANG || (CC_IS_CLANG && (AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)))
> +       depends on !CC_IS_CLANG || AS_IS_LLVM || (AS_IS_GNU && AS_VERSION >= 23502)
>         help
>           Generate DWARF v5 debug info. Requires binutils 2.35.2, gcc 5.0+ (gcc
>           5.0+ accepts the -gdwarf-5 flag but only had partial support for some
> --
> 2.34.1
>


-- 
Thanks,
~Nick Desaulniers