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@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 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
+object files. Such options should be disabled.
+
 Generated files in source packages
 ----------------------------------
 
-- 
2.43.0

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@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 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