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Commit 87c94bfb authored by Sam Ravnborg's avatar Sam Ravnborg Committed by Sam Ravnborg
Browse files

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: default avatarSam Ravnborg <sam@ravnborg.org>
parent b72e53f8

scripts/mkcompile_h

+20 −7
Original line number Diff line number Diff line
@@ -18,19 +18,32 @@ fi 
# Do not expand names

set -f



# 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=$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 @@ UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/" 


  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 @@ UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/" 
    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,