1 #!/bin/sh !! 1 TARGET=$1
2 # SPDX-License-Identifier: GPL-2.0 !! 2 ARCH=$2
>> 3 SMP=$3
>> 4 CC=$4
3 5
4 UTS_MACHINE=$1 !! 6 # If compile.h exists already and we don't own autoconf.h
5 CC_VERSION="$2" !! 7 # (i.e. we're not the same user who did make *config), don't
6 LD=$3 !! 8 # modify compile.h
>> 9 # So "sudo make install" won't change the "compiled by <user>"
>> 10 # do "compiled by root"
7 11
8 if test -z "$KBUILD_BUILD_USER"; then !! 12 if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then
9 LINUX_COMPILE_BY=$(whoami | sed 's/\\/ !! 13 echo " SKIPPED $TARGET"
10 else !! 14 exit 0
11 LINUX_COMPILE_BY=$KBUILD_BUILD_USER <<
12 fi 15 fi
13 if test -z "$KBUILD_BUILD_HOST"; then !! 16
14 LINUX_COMPILE_HOST=`uname -n` !! 17 # Do not expand names
>> 18 set -f
>> 19
>> 20 if [ -r .version ]; then
>> 21 VERSION=`cat .version`
15 else 22 else
16 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST !! 23 VERSION=0
>> 24 echo 0 > .version
17 fi 25 fi
18 26
19 LD_VERSION=$(LC_ALL=C $LD -v | head -n1 | <<
20 sed -e 's/(compatible with [^) <<
21 27
22 cat <<EOF !! 28 UTS_VERSION="#$VERSION"
23 #define UTS_MACHINE "${UTS_MACHINE !! 29 if [ -n "$SMP" ] ; then UTS_VERSION="$UTS_VERSION SMP"; fi
24 #define LINUX_COMPILE_BY "${LINUX_COMPI !! 30 UTS_VERSION="$UTS_VERSION `LC_ALL=C LANG=C date`"
25 #define LINUX_COMPILE_HOST "${LINUX_COMPI !! 31
26 #define LINUX_COMPILER "${CC_VERSION} !! 32 # Truncate to maximum length
27 EOF !! 33
>> 34 UTS_LEN=64
>> 35 UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/"
>> 36
>> 37 # Generate a temporary compile.h
>> 38
>> 39 ( echo /\* This file is auto generated, version $VERSION \*/
>> 40
>> 41 echo \#define UTS_MACHINE \"$ARCH\"
>> 42
>> 43 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
>> 44
>> 45 echo \#define LINUX_COMPILE_TIME \"`LC_ALL=C LANG=C date +%T`\"
>> 46 echo \#define LINUX_COMPILE_BY \"`whoami`\"
>> 47 echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
>> 48
>> 49 if [ -x /bin/dnsdomainname ]; then
>> 50 echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\"
>> 51 elif [ -x /bin/domainname ]; then
>> 52 echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\"
>> 53 else
>> 54 echo \#define LINUX_COMPILE_DOMAIN
>> 55 fi
>> 56
>> 57 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
>> 58 ) > .tmpcompile
>> 59
>> 60 # Only replace the real compile.h if the new one is different,
>> 61 # in order to preserve the timestamp and avoid unnecessary
>> 62 # recompilations.
>> 63 # We don't consider the file changed if only the date/time changed.
>> 64 # A kernel config change will increase the generation number, thus
>> 65 # causing compile.h to be updated (including date/time) due to the
>> 66 # changed comment in the
>> 67 # first line.
>> 68
>> 69 if [ -r $TARGET ] && \
>> 70 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \
>> 71 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \
>> 72 cmp -s .tmpver.1 .tmpver.2; then
>> 73 rm -f .tmpcompile
>> 74 else
>> 75 echo " UPD $TARGET"
>> 76 mv -f .tmpcompile $TARGET
>> 77 fi
>> 78 rm -f .tmpver.1 .tmpver.2
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