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