1*1da177e4SLinus TorvaldsTARGET=$1 2*1da177e4SLinus TorvaldsARCH=$2 3*1da177e4SLinus TorvaldsSMP=$3 4*1da177e4SLinus TorvaldsCC=$4 5*1da177e4SLinus Torvalds 6*1da177e4SLinus Torvalds# If compile.h exists already and we don't own autoconf.h 7*1da177e4SLinus Torvalds# (i.e. we're not the same user who did make *config), don't 8*1da177e4SLinus Torvalds# modify compile.h 9*1da177e4SLinus Torvalds# So "sudo make install" won't change the "compiled by <user>" 10*1da177e4SLinus Torvalds# do "compiled by root" 11*1da177e4SLinus Torvalds 12*1da177e4SLinus Torvaldsif [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then 13*1da177e4SLinus Torvalds echo " SKIPPED $TARGET" 14*1da177e4SLinus Torvalds exit 0 15*1da177e4SLinus Torvaldsfi 16*1da177e4SLinus Torvalds 17*1da177e4SLinus Torvalds# Do not expand names 18*1da177e4SLinus Torvaldsset -f 19*1da177e4SLinus Torvalds 20*1da177e4SLinus Torvaldsif [ -r .version ]; then 21*1da177e4SLinus Torvalds VERSION=`cat .version` 22*1da177e4SLinus Torvaldselse 23*1da177e4SLinus Torvalds VERSION=0 24*1da177e4SLinus Torvalds echo 0 > .version 25*1da177e4SLinus Torvaldsfi 26*1da177e4SLinus Torvalds 27*1da177e4SLinus Torvalds 28*1da177e4SLinus TorvaldsUTS_VERSION="#$VERSION" 29*1da177e4SLinus Torvaldsif [ -n "$SMP" ] ; then UTS_VERSION="$UTS_VERSION SMP"; fi 30*1da177e4SLinus TorvaldsUTS_VERSION="$UTS_VERSION `LC_ALL=C LANG=C date`" 31*1da177e4SLinus Torvalds 32*1da177e4SLinus Torvalds# Truncate to maximum length 33*1da177e4SLinus Torvalds 34*1da177e4SLinus TorvaldsUTS_LEN=64 35*1da177e4SLinus TorvaldsUTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/" 36*1da177e4SLinus Torvalds 37*1da177e4SLinus Torvalds# Generate a temporary compile.h 38*1da177e4SLinus Torvalds 39*1da177e4SLinus Torvalds( echo /\* This file is auto generated, version $VERSION \*/ 40*1da177e4SLinus Torvalds 41*1da177e4SLinus Torvalds echo \#define UTS_MACHINE \"$ARCH\" 42*1da177e4SLinus Torvalds 43*1da177e4SLinus Torvalds echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" 44*1da177e4SLinus Torvalds 45*1da177e4SLinus Torvalds echo \#define LINUX_COMPILE_TIME \"`LC_ALL=C LANG=C date +%T`\" 46*1da177e4SLinus Torvalds echo \#define LINUX_COMPILE_BY \"`whoami`\" 47*1da177e4SLinus Torvalds echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\" 48*1da177e4SLinus Torvalds 49*1da177e4SLinus Torvalds if [ -x /bin/dnsdomainname ]; then 50*1da177e4SLinus Torvalds echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\" 51*1da177e4SLinus Torvalds elif [ -x /bin/domainname ]; then 52*1da177e4SLinus Torvalds echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\" 53*1da177e4SLinus Torvalds else 54*1da177e4SLinus Torvalds echo \#define LINUX_COMPILE_DOMAIN 55*1da177e4SLinus Torvalds fi 56*1da177e4SLinus Torvalds 57*1da177e4SLinus Torvalds echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\" 58*1da177e4SLinus Torvalds) > .tmpcompile 59*1da177e4SLinus Torvalds 60*1da177e4SLinus Torvalds# Only replace the real compile.h if the new one is different, 61*1da177e4SLinus Torvalds# in order to preserve the timestamp and avoid unnecessary 62*1da177e4SLinus Torvalds# recompilations. 63*1da177e4SLinus Torvalds# We don't consider the file changed if only the date/time changed. 64*1da177e4SLinus Torvalds# A kernel config change will increase the generation number, thus 65*1da177e4SLinus Torvalds# causing compile.h to be updated (including date/time) due to the 66*1da177e4SLinus Torvalds# changed comment in the 67*1da177e4SLinus Torvalds# first line. 68*1da177e4SLinus Torvalds 69*1da177e4SLinus Torvaldsif [ -r $TARGET ] && \ 70*1da177e4SLinus Torvalds grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \ 71*1da177e4SLinus Torvalds grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \ 72*1da177e4SLinus Torvalds cmp -s .tmpver.1 .tmpver.2; then 73*1da177e4SLinus Torvalds rm -f .tmpcompile 74*1da177e4SLinus Torvaldselse 75*1da177e4SLinus Torvalds echo " UPD $TARGET" 76*1da177e4SLinus Torvalds mv -f .tmpcompile $TARGET 77*1da177e4SLinus Torvaldsfi 78*1da177e4SLinus Torvaldsrm -f .tmpver.1 .tmpver.2 79