17c5ca9883
UTS_TRUNCATTE is simpler this way, and now editors idetify this as a shell script. Signed-off-by: Felipe Contreras <felipe.contreras@gmail.com> Acked-by: WANG Cong <xiyou.wangcong@gmail.com> Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
103 lines
2.6 KiB
Bash
Executable file
103 lines
2.6 KiB
Bash
Executable file
#!/bin/sh
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TARGET=$1
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ARCH=$2
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SMP=$3
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PREEMPT=$4
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CC=$5
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vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
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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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vecho " SKIPPED $TARGET"
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exit 0
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fi
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# Do not expand names
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set -f
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# Fix the language to get consistent output
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LC_ALL=C
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export LC_ALL
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if [ -z "$KBUILD_BUILD_VERSION" ]; then
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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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else
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VERSION=$KBUILD_BUILD_VERSION
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fi
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if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
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TIMESTAMP=`date`
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else
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TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
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fi
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UTS_VERSION="#$VERSION"
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CONFIG_FLAGS=""
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if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
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if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
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UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
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# Truncate to maximum length
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UTS_LEN=64
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UTS_TRUNCATE="cut -b -$UTS_LEN"
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# Generate a temporary compile.h
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( echo /\* This file is auto generated, version $VERSION \*/
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if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
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echo \#define UTS_MACHINE \"$ARCH\"
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echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
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echo \#define LINUX_COMPILE_TIME \"`date +%T`\"
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echo \#define LINUX_COMPILE_BY \"`whoami`\"
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echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
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if [ -x /bin/dnsdomainname ]; then
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domain=`dnsdomainname 2> /dev/null`
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elif [ -x /bin/domainname ]; then
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domain=`domainname 2> /dev/null`
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fi
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if [ -n "$domain" ]; then
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echo \#define LINUX_COMPILE_DOMAIN \"`echo $domain | $UTS_TRUNCATE`\"
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else
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echo \#define LINUX_COMPILE_DOMAIN
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fi
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echo \#define LINUX_COMPILER \"`$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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vecho " 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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