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