linux-kernel - Re: [PATCH v2] Documentation: kbuild: note CONFIG_DEBUG

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Message-ID: <e11c90fa-0363-4092-863f-240b31504209@infradead.org>
Date: Wed, 24 Sep 2025 16:15:55 -0700
From: Randy Dunlap <rdunlap@...radead.org>
To: Nicolas Schier <nsc@...nel.org>, Nathan Chancellor <nathan@...nel.org>,
 Jonathan Corbet <corbet@....net>
Cc: Ard Biesheuvel <ardb@...nel.org>, Ben Hutchings <ben@...adent.org.uk>,
 Masahiro Yamada <masahiroy@...nel.org>, linux-doc@...r.kernel.org,
 linux-kbuild@...r.kernel.org, linux-kernel@...r.kernel.org
Subject: Re: [PATCH v2] Documentation: kbuild: note CONFIG_DEBUG_EFI in
 reproducible builds



On 9/24/25 12:47 PM, Nicolas Schier wrote:
> From: Masahiro Yamada <masahiroy@...nel.org>
> 
> 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>
> Signed-off-by: Nicolas Schier <nsc@...nel.org>

Reviewed-by: Randy Dunlap <rdunlap@...radead.org>
Tested-by: Randy Dunlap <rdunlap@...radead.org>

Thanks.

> ---
> Changes in v2:
>   * Fixed a grammar typo (Randy)
>   * v1: https://lore.kernel.org/linux-kbuild/20250625125809.2504963-1-masahiroy@kernel.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 f2dcc39044e66ddd165646e0b51ccb0209aca7dd..96d208e578cd53d3f0c4a24ec983a9179260345d 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` embed absolute paths in
> +object files. Such options should be disabled.
> +
>  Generated files in source packages
>  ----------------------------------
>  
> 
> ---
> base-commit: cec1e6e5d1ab33403b809f79cd20d6aff124ccfe
> change-id: 20250924-kbuild-doc-config-debug-efi-in-reproducible-builds-eb7489a8d185
> 
> Best regards,

-- 
~Randy