1TARGET=$1 2ARCH=$2 3SMP=$3 4PREEMPT=$4 5CC=$5 6 7vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } 8 9# If compile.h exists already and we don't own autoconf.h 10# (i.e. we're not the same user who did make *config), don't 11# modify compile.h 12# So "sudo make install" won't change the "compiled by <user>" 13# do "compiled by root" 14 15if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then 16 vecho " SKIPPED $TARGET" 17 exit 0 18fi 19 20# Do not expand names 21set -f 22 23# Fix the language to get consistent output 24LC_ALL=C 25export LC_ALL 26 27if [ -z "$KBUILD_BUILD_VERSION" ]; then 28 if [ -r .version ]; then 29 VERSION=`cat .version` 30 else 31 VERSION=0 32 echo 0 > .version 33 fi 34else 35 VERSION=$KBUILD_BUILD_VERSION 36fi 37 38if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then 39 TIMESTAMP=`date` 40else 41 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP 42fi 43 44UTS_VERSION="#$VERSION" 45CONFIG_FLAGS="" 46if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi 47if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi 48UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" 49 50# Truncate to maximum length 51 52UTS_LEN=64 53UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/" 54 55# Generate a temporary compile.h 56 57( echo /\* This file is auto generated, version $VERSION \*/ 58 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi 59 60 echo \#define UTS_MACHINE \"$ARCH\" 61 62 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" 63 64 echo \#define LINUX_COMPILE_TIME \"`date +%T`\" 65 echo \#define LINUX_COMPILE_BY \"`whoami`\" 66 echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\" 67 68 if [ -x /bin/dnsdomainname ]; then 69 echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\" 70 elif [ -x /bin/domainname ]; then 71 echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\" 72 else 73 echo \#define LINUX_COMPILE_DOMAIN 74 fi 75 76 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\" 77) > .tmpcompile 78 79# Only replace the real compile.h if the new one is different, 80# in order to preserve the timestamp and avoid unnecessary 81# recompilations. 82# We don't consider the file changed if only the date/time changed. 83# A kernel config change will increase the generation number, thus 84# causing compile.h to be updated (including date/time) due to the 85# changed comment in the 86# first line. 87 88if [ -r $TARGET ] && \ 89 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \ 90 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \ 91 cmp -s .tmpver.1 .tmpver.2; then 92 rm -f .tmpcompile 93else 94 vecho " UPD $TARGET" 95 mv -f .tmpcompile $TARGET 96fi 97rm -f .tmpver.1 .tmpver.2 98