commit 87c94bfb8ad354fb43d2caf870d7ca0b3f98dab3
author Sam Ravnborg <sam@neptun.ravnborg.org> Sun Apr 01 21:49:27 2007 +0200
committer Sam Ravnborg <sam@ravnborg.org> Wed May 02 20:58:09 2007 +0200
tree 796c87da12f564e5ecb5a0c1d57ea94c9dd7604a
parent b72e53f8bbbec8421316220291d8a8002a5562ba

kbuild: override build timestamp & version

Introduce KBUILD_BUILD_VERSION to make it
possible to override kernel build version
during build time.

Introduce KBUILD_BUILD_TIMESTAMP to make it
possible to override kernel build timestamp
during build time.

But variables are useful mainly by distros
that want to pass info from an SCM when
building the kernel. Timestamp could be last
checkin date for a file etc.

The idea came from Olaf Hering <olaf@aepfle.de>

Cc: Olaf Hering <olaf@aepfle.de>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>

scripts/mkcompile_h

diff --git a/scripts/mkcompile_h b/scripts/mkcompile_h
index 82d0af4..a8740df 100755
--- a/scripts/mkcompile_h
+++ b/scripts/mkcompile_h
@@ -18,19 +18,32 @@
 # Do not expand names
 set -f
 
-if [ -r .version ]; then
-  VERSION=`cat .version`
+# Fix the language to get consistent output
+LC_ALL=C
+export LC_ALL
+
+if [ -z "$KBUILD_BUILD_VERSION" ]; then
+	if [ -r .version ]; then
+		VERSION=`cat .version`
+	else
+		VERSION=0
+		echo 0 > .version
+	fi
 else
-  VERSION=0
-  echo 0 > .version
+	VERSION=$KBUILD_BUILD_VERSION
 fi
 
+if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
+	TIMESTAMP=`date`
+else
+	TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
+fi
 
 UTS_VERSION="#$VERSION"
 CONFIG_FLAGS=""
 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
-UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS `LC_ALL=C LANG=C date`"
+UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
 
 # Truncate to maximum length
 
@@ -46,7 +59,7 @@
 
   echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
 
-  echo \#define LINUX_COMPILE_TIME \"`LC_ALL=C LANG=C date +%T`\"
+  echo \#define LINUX_COMPILE_TIME \"`date +%T`\"
   echo \#define LINUX_COMPILE_BY \"`whoami`\"
   echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
 
@@ -58,7 +71,7 @@
     echo \#define LINUX_COMPILE_DOMAIN
   fi
 
-  echo \#define LINUX_COMPILER \"`LC_ALL=C LANG=C $CC -v 2>&1 | tail -n 1`\"
+  echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
 ) > .tmpcompile
 
 # Only replace the real compile.h if the new one is different,