linux-kernel - [PATCH] kbuild: add documentation of KBUILD_BUILD

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Message-Id: <1428216268-3545-1-git-send-email-hofrat@osadl.org>
Date:	Sun,  5 Apr 2015 08:44:28 +0200
From:	Nicholas Mc Guire <hofrat@...dl.org>
To:	Michal Marek <mmarek@...e.cz>
Cc:	Jonathan Corbet <corbet@....net>, linux-kbuild@...r.kernel.org,
	linux-doc@...r.kernel.org, linux-kernel@...r.kernel.org,
	Nicholas Mc Guire <hofrat@...dl.org>
Subject: [PATCH] kbuild: add documentation of KBUILD_BUILD_VERSION

KBUILD_BUILD_VERSION is currently not documented but it is
needed when rebuilding a kernel that should result in the identical
binary. This is a brief documentation of KBUILD_BUILD_VERSION.

Signed-off-by: Nicholas Mc Guire <hofrat@...dl.org>
---

Patch is against 4.0-rc6 (localversion-next is -next-20150402)

 Documentation/kbuild/kbuild.txt |    8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/Documentation/kbuild/kbuild.txt b/Documentation/kbuild/kbuild.txt
index 6466704..7ad01d9 100644
--- a/Documentation/kbuild/kbuild.txt
+++ b/Documentation/kbuild/kbuild.txt
@@ -213,6 +213,14 @@ UTS_VERSION definition (uname -v in the running kernel). The value has to
 be a string that can be passed to date -d. The default value
 is the output of the date command at one point during build.
 
+KBUILD_BUILD_VERSION
+--------------------------------------------------
+Setting this to an integer overrides the build version number used in the
+UTS_VERSION definition (uname -v in the running kernel shown as e.g. #1).
+The default value is set to 0 if .version does not yet exist and is
+generated by incrementing the current value in .version by one if it
+already exists.
+
 KBUILD_BUILD_USER, KBUILD_BUILD_HOST
 --------------------------------------------------
 These two variables allow to override the user@...t string displayed during
-- 
1.7.10.4

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