1 #!/bin/sh 1 #!/bin/sh
2 # SPDX-License-Identifier: GPL-2.0 <<
3 2
4 UTS_MACHINE=$1 !! 3 TARGET=$1
5 CC_VERSION="$2" !! 4 ARCH=$2
6 LD=$3 !! 5 SMP=$3
>> 6 PREEMPT=$4
>> 7 CC=$5
7 8
8 if test -z "$KBUILD_BUILD_USER"; then !! 9 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
9 LINUX_COMPILE_BY=$(whoami | sed 's/\\/ !! 10
>> 11 # If compile.h exists already and we don't own autoconf.h
>> 12 # (i.e. we're not the same user who did make *config), don't
>> 13 # modify compile.h
>> 14 # So "sudo make install" won't change the "compiled by <user>"
>> 15 # do "compiled by root"
>> 16
>> 17 if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then
>> 18 vecho " SKIPPED $TARGET"
>> 19 exit 0
>> 20 fi
>> 21
>> 22 # Do not expand names
>> 23 set -f
>> 24
>> 25 # Fix the language to get consistent output
>> 26 LC_ALL=C
>> 27 export LC_ALL
>> 28
>> 29 if [ -z "$KBUILD_BUILD_VERSION" ]; then
>> 30 if [ -r .version ]; then
>> 31 VERSION=`cat .version`
>> 32 else
>> 33 VERSION=0
>> 34 echo 0 > .version
>> 35 fi
10 else 36 else
11 LINUX_COMPILE_BY=$KBUILD_BUILD_USER !! 37 VERSION=$KBUILD_BUILD_VERSION
12 fi 38 fi
13 if test -z "$KBUILD_BUILD_HOST"; then !! 39
14 LINUX_COMPILE_HOST=`uname -n` !! 40 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
>> 41 TIMESTAMP=`date`
15 else 42 else
16 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST !! 43 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
17 fi 44 fi
18 45
19 LD_VERSION=$(LC_ALL=C $LD -v | head -n1 | !! 46 UTS_VERSION="#$VERSION"
20 sed -e 's/(compatible with [^) !! 47 CONFIG_FLAGS=""
>> 48 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
>> 49 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
>> 50 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
>> 51
>> 52 # Truncate to maximum length
>> 53
>> 54 UTS_LEN=64
>> 55 UTS_TRUNCATE="cut -b -$UTS_LEN"
>> 56
>> 57 # Generate a temporary compile.h
21 58
22 cat <<EOF !! 59 ( echo /\* This file is auto generated, version $VERSION \*/
23 #define UTS_MACHINE "${UTS_MACHINE !! 60 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
24 #define LINUX_COMPILE_BY "${LINUX_COMPI !! 61
25 #define LINUX_COMPILE_HOST "${LINUX_COMPI !! 62 echo \#define UTS_MACHINE \"$ARCH\"
26 #define LINUX_COMPILER "${CC_VERSION} !! 63
27 EOF !! 64 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
>> 65
>> 66 echo \#define LINUX_COMPILE_TIME \"`date +%T`\"
>> 67 echo \#define LINUX_COMPILE_BY \"`whoami`\"
>> 68 echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
>> 69
>> 70 if [ -x /bin/dnsdomainname ]; then
>> 71 domain=`dnsdomainname 2> /dev/null`
>> 72 elif [ -x /bin/domainname ]; then
>> 73 domain=`domainname 2> /dev/null`
>> 74 fi
>> 75
>> 76 if [ -n "$domain" ]; then
>> 77 echo \#define LINUX_COMPILE_DOMAIN \"`echo $domain | $UTS_TRUNCATE`\"
>> 78 else
>> 79 echo \#define LINUX_COMPILE_DOMAIN
>> 80 fi
>> 81
>> 82 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
>> 83 ) > .tmpcompile
>> 84
>> 85 # Only replace the real compile.h if the new one is different,
>> 86 # in order to preserve the timestamp and avoid unnecessary
>> 87 # recompilations.
>> 88 # We don't consider the file changed if only the date/time changed.
>> 89 # A kernel config change will increase the generation number, thus
>> 90 # causing compile.h to be updated (including date/time) due to the
>> 91 # changed comment in the
>> 92 # first line.
>> 93
>> 94 if [ -r $TARGET ] && \
>> 95 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \
>> 96 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \
>> 97 cmp -s .tmpver.1 .tmpver.2; then
>> 98 rm -f .tmpcompile
>> 99 else
>> 100 vecho " UPD $TARGET"
>> 101 mv -f .tmpcompile $TARGET
>> 102 fi
>> 103 rm -f .tmpver.1 .tmpver.2
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