1TARGET=$1 2ARCH=$2 3SMP=$3 4PREEMPT=$4 5CC=$5 6 7# If compile.h exists already and we don't own autoconf.h 8# (i.e. we're not the same user who did make *config), don't 9# modify compile.h 10# So "sudo make install" won't change the "compiled by <user>" 11# do "compiled by root" 12 13if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then 14 echo " SKIPPED $TARGET" 15 exit 0 16fi 17 18# Do not expand names 19set -f 20 21# Fix the language to get consistent output 22LC_ALL=C 23export LC_ALL 24 25if [ -z "$KBUILD_BUILD_VERSION" ]; then 26 if [ -r .version ]; then 27 VERSION=`cat .version` 28 else 29 VERSION=0 30 echo 0 > .version 31 fi 32else 33 VERSION=$KBUILD_BUILD_VERSION 34fi 35 36if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then 37 TIMESTAMP=`date` 38else 39 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP 40fi 41 42UTS_VERSION="#$VERSION" 43CONFIG_FLAGS="" 44if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi 45if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi 46UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" 47 48# Truncate to maximum length 49 50UTS_LEN=64 51UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/" 52 53# Generate a temporary compile.h 54 55( echo /\* This file is auto generated, version $VERSION \*/ 56 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi 57 58 echo \#define UTS_MACHINE \"$ARCH\" 59 60 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" 61 62 echo \#define LINUX_COMPILE_TIME \"`date +%T`\" 63 echo \#define LINUX_COMPILE_BY \"`whoami`\" 64 echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\" 65 66 if [ -x /bin/dnsdomainname ]; then 67 echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\" 68 elif [ -x /bin/domainname ]; then 69 echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\" 70 else 71 echo \#define LINUX_COMPILE_DOMAIN 72 fi 73 74 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\" 75) > .tmpcompile 76 77# Only replace the real compile.h if the new one is different, 78# in order to preserve the timestamp and avoid unnecessary 79# recompilations. 80# We don't consider the file changed if only the date/time changed. 81# A kernel config change will increase the generation number, thus 82# causing compile.h to be updated (including date/time) due to the 83# changed comment in the 84# first line. 85 86if [ -r $TARGET ] && \ 87 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \ 88 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \ 89 cmp -s .tmpver.1 .tmpver.2; then 90 rm -f .tmpcompile 91else 92 echo " UPD $TARGET" 93 mv -f .tmpcompile $TARGET 94fi 95rm -f .tmpver.1 .tmpver.2 96