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

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Date:   Mon, 3 Oct 2022 09:47:11 -0700
From:   Nathan Chancellor <nathan@...nel.org>
To:     Masahiro Yamada <masahiroy@...nel.org>
Cc:     linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH 1/3] Kconfig.debug: simplify the dependency of
 DEBUG_INFO_DWARF4/5

On Mon, Oct 03, 2022 at 03:11:05AM +0900, Masahiro Yamada 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.
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>

Good point!

Reviewed-by: Nathan Chancellor <nathan@...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
>