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 CC=$5
7 9
>> 10 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
>> 11
>> 12 # If compile.h exists already and we don't own autoconf.h
>> 13 # (i.e. we're not the same user who did make *config), don't
>> 14 # modify compile.h
>> 15 # So "sudo make install" won't change the "compiled by <user>"
>> 16 # do "compiled by root"
>> 17
>> 18 if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
>> 19 vecho " SKIPPED $TARGET"
>> 20 exit 0
>> 21 fi
>> 22
>> 23 # Do not expand names
>> 24 set -f
>> 25
>> 26 # Fix the language to get consistent output
>> 27 LC_ALL=C
>> 28 export LC_ALL
>> 29
>> 30 if [ -z "$KBUILD_BUILD_VERSION" ]; then
>> 31 if [ -r .version ]; then
>> 32 VERSION=`cat .version`
>> 33 else
>> 34 VERSION=0
>> 35 echo 0 > .version
>> 36 fi
>> 37 else
>> 38 VERSION=$KBUILD_BUILD_VERSION
>> 39 fi
>> 40
>> 41 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
>> 42 TIMESTAMP=`date`
>> 43 else
>> 44 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
>> 45 fi
8 if test -z "$KBUILD_BUILD_USER"; then 46 if test -z "$KBUILD_BUILD_USER"; then
9 LINUX_COMPILE_BY=$(whoami | sed 's/\\/ 47 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
10 else 48 else
11 LINUX_COMPILE_BY=$KBUILD_BUILD_USER 49 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
12 fi 50 fi
13 if test -z "$KBUILD_BUILD_HOST"; then 51 if test -z "$KBUILD_BUILD_HOST"; then
14 LINUX_COMPILE_HOST=`uname -n` !! 52 LINUX_COMPILE_HOST=`hostname`
15 else 53 else
16 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST 54 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
17 fi 55 fi
18 56
19 LD_VERSION=$(LC_ALL=C $LD -v | head -n1 | !! 57 UTS_VERSION="#$VERSION"
20 sed -e 's/(compatible with [^) !! 58 CONFIG_FLAGS=""
>> 59 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
>> 60 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
>> 61 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
>> 62
>> 63 # Truncate to maximum length
>> 64
>> 65 UTS_LEN=64
>> 66 UTS_TRUNCATE="cut -b -$UTS_LEN"
21 67
22 cat <<EOF !! 68 # Generate a temporary compile.h
23 #define UTS_MACHINE "${UTS_MACHINE !! 69
24 #define LINUX_COMPILE_BY "${LINUX_COMPI !! 70 ( echo /\* This file is auto generated, version $VERSION \*/
25 #define LINUX_COMPILE_HOST "${LINUX_COMPI !! 71 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
26 #define LINUX_COMPILER "${CC_VERSION} !! 72
27 EOF !! 73 echo \#define UTS_MACHINE \"$ARCH\"
>> 74
>> 75 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
>> 76
>> 77 echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
>> 78 echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
>> 79
>> 80 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
>> 81 ) > .tmpcompile
>> 82
>> 83 # Only replace the real compile.h if the new one is different,
>> 84 # in order to preserve the timestamp and avoid unnecessary
>> 85 # recompilations.
>> 86 # We don't consider the file changed if only the date/time changed,
>> 87 # unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for
>> 88 # reproducible builds with that value referring to a commit timestamp).
>> 89 # A kernel config change will increase the generation number, thus
>> 90 # causing compile.h to be updated (including date/time) due to the
>> 91 # changed comment in the
>> 92 # first line.
>> 93
>> 94 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
>> 95 IGNORE_PATTERN="UTS_VERSION"
>> 96 else
>> 97 IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED"
>> 98 fi
>> 99
>> 100 if [ -r $TARGET ] && \
>> 101 grep -v $IGNORE_PATTERN $TARGET > .tmpver.1 && \
>> 102 grep -v $IGNORE_PATTERN .tmpcompile > .tmpver.2 && \
>> 103 cmp -s .tmpver.1 .tmpver.2; then
>> 104 rm -f .tmpcompile
>> 105 else
>> 106 vecho " UPD $TARGET"
>> 107 mv -f .tmpcompile $TARGET
>> 108 fi
>> 109 rm -f .tmpver.1 .tmpver.2
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