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

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Message-ID: <20250625125809.2504963-1-masahiroy@kernel.org>
Date: Wed, 25 Jun 2025 21:57:40 +0900
From: Masahiro Yamada <masahiroy@...nel.org>
To: linux-kbuild@...r.kernel.org
Cc: Ard Biesheuvel <ardb@...nel.org>,
	Ben Hutchings <ben@...adent.org.uk>,
	Masahiro Yamada <masahiroy@...nel.org>,
	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: [PATCH] Documentation: kbuild: note CONFIG_DEBUG_EFI in reproducible builds

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