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=$5
7 8
>> 9 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
>> 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/generated/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
>> 36 else
>> 37 VERSION=$KBUILD_BUILD_VERSION
>> 38 fi
>> 39
>> 40 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
>> 41 TIMESTAMP=`date`
>> 42 else
>> 43 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
>> 44 fi
8 if test -z "$KBUILD_BUILD_USER"; then 45 if test -z "$KBUILD_BUILD_USER"; then
9 LINUX_COMPILE_BY=$(whoami | sed 's/\\/ 46 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
10 else 47 else
11 LINUX_COMPILE_BY=$KBUILD_BUILD_USER 48 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
12 fi 49 fi
13 if test -z "$KBUILD_BUILD_HOST"; then 50 if test -z "$KBUILD_BUILD_HOST"; then
14 LINUX_COMPILE_HOST=`uname -n` !! 51 LINUX_COMPILE_HOST=`hostname`
15 else 52 else
16 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST 53 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
17 fi 54 fi
18 55
19 LD_VERSION=$(LC_ALL=C $LD -v | head -n1 | !! 56 UTS_VERSION="#$VERSION"
20 sed -e 's/(compatible with [^) !! 57 CONFIG_FLAGS=""
>> 58 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
>> 59 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
>> 60 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
>> 61
>> 62 # Truncate to maximum length
>> 63
>> 64 UTS_LEN=64
>> 65 UTS_TRUNCATE="cut -b -$UTS_LEN"
21 66
22 cat <<EOF !! 67 # Generate a temporary compile.h
23 #define UTS_MACHINE "${UTS_MACHINE !! 68
24 #define LINUX_COMPILE_BY "${LINUX_COMPI !! 69 ( echo /\* This file is auto generated, version $VERSION \*/
25 #define LINUX_COMPILE_HOST "${LINUX_COMPI !! 70 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
26 #define LINUX_COMPILER "${CC_VERSION} !! 71
27 EOF !! 72 echo \#define UTS_MACHINE \"$ARCH\"
>> 73
>> 74 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
>> 75
>> 76 echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
>> 77 echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
>> 78
>> 79 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version '`\"
>> 80 ) > .tmpcompile
>> 81
>> 82 # Only replace the real compile.h if the new one is different,
>> 83 # in order to preserve the timestamp and avoid unnecessary
>> 84 # recompilations.
>> 85 # We don't consider the file changed if only the date/time changed,
>> 86 # unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for
>> 87 # reproducible builds with that value referring to a commit timestamp).
>> 88 # A kernel config change will increase the generation number, thus
>> 89 # causing compile.h to be updated (including date/time) due to the
>> 90 # changed comment in the
>> 91 # first line.
>> 92
>> 93 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
>> 94 IGNORE_PATTERN="UTS_VERSION"
>> 95 else
>> 96 IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED"
>> 97 fi
>> 98
>> 99 if [ -r $TARGET ] && \
>> 100 grep -v $IGNORE_PATTERN $TARGET > .tmpver.1 && \
>> 101 grep -v $IGNORE_PATTERN .tmpcompile > .tmpver.2 && \
>> 102 cmp -s .tmpver.1 .tmpver.2; then
>> 103 rm -f .tmpcompile
>> 104 else
>> 105 vecho " UPD $TARGET"
>> 106 mv -f .tmpcompile $TARGET
>> 107 fi
>> 108 rm -f .tmpver.1 .tmpver.2
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