[PATCH v2] Documentation: kbuild: note CONFIG_DEBUG_EFI in reproducible builds

[Nicolas Schier]

From: Masahiro Yamada <masahiroy@xxxxxxxxxx>

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@xxxxxxxxxx>
Signed-off-by: Nicolas Schier <nsc@xxxxxxxxxx>
---
Changes in v2:
  * Fixed a grammar typo (Randy)
  * v1: https://lore.kernel.org/linux-kbuild/20250625125809.2504963-1-masahiroy@xxxxxxxxxx
---
 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,
-- 
Nicolas