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