linux-kernel - Re: [PATCH] Documentation: kbuild: note CONFIG_DEBUG

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Message-ID: <0f006fbf-c930-40aa-b08a-8e1b7275ea43@infradead.org>
Date: Wed, 25 Jun 2025 10:07:21 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: Masahiro Yamada <masahiroy@...nel.org>, linux-kbuild@...r.kernel.org
Cc: Ard Biesheuvel <ardb@...nel.org>, Ben Hutchings <ben@...adent.org.uk>,
 Jonathan Corbet <corbet@....net>, Nathan Chancellor <nathan@...nel.org>,
 Nicolas Schier <nicolas.schier@...ux.dev>, linux-doc@...r.kernel.org,
 linux-kernel@...r.kernel.org
Subject: Re: [PATCH] Documentation: kbuild: note CONFIG_DEBUG_EFI in
 reproducible builds

Hi,

On 6/25/25 5:57 AM, Masahiro Yamada wrote:
> CONFIG_EFI_DEBUG embeds absolute file paths into object files, which
> makes the resulting vmlinux specific to the build environment.
> 
> Add a note about this in reproducible-builds.rst
> 
> Signed-off-by: Masahiro Yamada <masahiroy@...nel.org>
> ---
> 
>  Documentation/kbuild/reproducible-builds.rst | 3 +++
>  1 file changed, 3 insertions(+)
> 
> diff --git a/Documentation/kbuild/reproducible-builds.rst b/Documentation/kbuild/reproducible-builds.rst
> index f2dcc39044e6..7a16dbc275ca 100644
> --- a/Documentation/kbuild/reproducible-builds.rst
> +++ b/Documentation/kbuild/reproducible-builds.rst
> @@ -61,6 +61,9 @@ supported.
>  The Reproducible Builds web site has more information about these
>  `prefix-map options`_.
>  
> +Some CONFIG options such as `CONFIG_DEBUG_EFI` embeds absolute paths in

               options                            embed

> +object files. Such options should be disabled.
> +
>  Generated files in source packages
>  ----------------------------------
>  

-- 
~Randy