TARGET=$1 ARCH=$2 SMP=$3 PREEMPT=$4 CC=$5 # If compile.h exists already and we don't own autoconf.h # (i.e. we're not the same user who did make *config), don't # modify compile.h # So "sudo make install" won't change the "compiled by <user>" # do "compiled by root" if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then echo " SKIPPED $TARGET" exit 0 fi # Do not expand names set -f # Fix the language to get consistent output LC_ALL=C export LC_ALL if [ -z "$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 $TIMESTAMP" # Truncate to maximum length UTS_LEN=64 UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/" # Generate a temporary compile.h ( echo /\* This file is auto generated, version $VERSION \*/ if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi echo \#define UTS_MACHINE \"$ARCH\" echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" echo \#define LINUX_COMPILE_TIME \"`date +%T`\" echo \#define LINUX_COMPILE_BY \"`whoami`\" echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\" if [ -x /bin/dnsdomainname ]; then echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\" elif [ -x /bin/domainname ]; then echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\" else echo \#define LINUX_COMPILE_DOMAIN fi echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\" ) > .tmpcompile # Only replace the real compile.h if the new one is different, # in order to preserve the timestamp and avoid unnecessary # recompilations. # We don't consider the file changed if only the date/time changed. # A kernel config change will increase the generation number, thus # causing compile.h to be updated (including date/time) due to the # changed comment in the # first line. if [ -r $TARGET ] && \ grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \ grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \ cmp -s .tmpver.1 .tmpver.2; then rm -f .tmpcompile else echo " UPD $TARGET" mv -f .tmpcompile $TARGET fi rm -f .tmpver.1 .tmpver.2