| TARGET=$1 |
| ARCH=$2 |
| SMP=$3 |
| CC=$4 |
| |
| if [ -r ../.version ]; then |
| VERSION=`cat ../.version` |
| else |
| VERSION=0 |
| echo 0 > ../.version |
| fi |
| |
| |
| UTS_VERSION="#$VERSION" |
| if [ -n "$SMP" ] ; then UTS_VERSION="$UTS_VERSION SMP"; fi |
| UTS_VERSION="$UTS_VERSION `LANG=C date`" |
| |
| # 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 $VERSION \*/ |
| |
| echo \#define UTS_MACHINE \"$ARCH\" |
| |
| echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" |
| |
| echo \#define LINUX_COMPILE_TIME \"`LANG=C 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 -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 |
| echo ' (unchanged)' |
| rm -f .tmpcompile |
| else |
| echo ' (updated)' |
| mv -f .tmpcompile $TARGET |
| fi |
| rm -f .tmpver.1 .tmpver.2 |