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