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1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3
4TARGET=$1
5ARCH=$2
6SMP=$3
7PREEMPT=$4
8PREEMPT_RT=$5
9CC=$6
10
11vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
12
13# If compile.h exists already and we don't own autoconf.h
14# (i.e. we're not the same user who did make *config), don't
15# modify compile.h
16# So "sudo make install" won't change the "compiled by <user>"
17# do "compiled by root"
18
19if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
20 vecho " SKIPPED $TARGET"
21 exit 0
22fi
23
24# Do not expand names
25set -f
26
27# Fix the language to get consistent output
28LC_ALL=C
29export LC_ALL
30
31if [ -z "$KBUILD_BUILD_VERSION" ]; then
32 VERSION=$(cat .version 2>/dev/null || echo 1)
33else
34 VERSION=$KBUILD_BUILD_VERSION
35fi
36
37if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
38 TIMESTAMP=`date`
39else
40 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
41fi
42if test -z "$KBUILD_BUILD_USER"; then
43 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
44else
45 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
46fi
47if test -z "$KBUILD_BUILD_HOST"; then
48 LINUX_COMPILE_HOST=`hostname`
49else
50 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
51fi
52
53UTS_VERSION="#$VERSION"
54CONFIG_FLAGS=""
55if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
56if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
57if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi
58UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
59
60# Truncate to maximum length
61
62UTS_LEN=64
63UTS_TRUNCATE="cut -b -$UTS_LEN"
64
65# Generate a temporary compile.h
66
67{ echo /\* This file is auto generated, version $VERSION \*/
68 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
69
70 echo \#define UTS_MACHINE \"$ARCH\"
71
72 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
73
74 echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
75 echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
76
77 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
78} > .tmpcompile
79
80# Only replace the real compile.h if the new one is different,
81# in order to preserve the timestamp and avoid unnecessary
82# recompilations.
83# We don't consider the file changed if only the date/time changed.
84# A kernel config change will increase the generation number, thus
85# causing compile.h to be updated (including date/time) due to the
86# changed comment in the
87# first line.
88
89if [ -r $TARGET ] && \
90 grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \
91 grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \
92 cmp -s .tmpver.1 .tmpver.2; then
93 rm -f .tmpcompile
94else
95 vecho " UPD $TARGET"
96 mv -f .tmpcompile $TARGET
97fi
98rm -f .tmpver.1 .tmpver.2
1#!/bin/sh
2# SPDX-License-Identifier: GPL-2.0
3
4TARGET=$1
5ARCH=$2
6SMP=$3
7PREEMPT=$4
8PREEMPT_RT=$5
9CC_VERSION="$6"
10LD=$7
11
12# Do not expand names
13set -f
14
15# Fix the language to get consistent output
16LC_ALL=C
17export LC_ALL
18
19if [ -z "$KBUILD_BUILD_VERSION" ]; then
20 VERSION=$(cat .version 2>/dev/null || echo 1)
21else
22 VERSION=$KBUILD_BUILD_VERSION
23fi
24
25if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
26 TIMESTAMP=`date`
27else
28 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
29fi
30if test -z "$KBUILD_BUILD_USER"; then
31 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
32else
33 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
34fi
35if test -z "$KBUILD_BUILD_HOST"; then
36 LINUX_COMPILE_HOST=`uname -n`
37else
38 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
39fi
40
41UTS_VERSION="#$VERSION"
42CONFIG_FLAGS=""
43if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
44if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
45if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi
46
47# Truncate to maximum length
48UTS_LEN=64
49UTS_VERSION="$(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 "/* $CONFIG_FLAGS */"; fi
55
56 echo \#define UTS_MACHINE \"$ARCH\"
57
58 echo \#define UTS_VERSION \"$UTS_VERSION\"
59
60 printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
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, $LD_VERSION"
66} > .tmpcompile
67
68# Only replace the real compile.h if the new one is different,
69# in order to preserve the timestamp and avoid unnecessary
70# recompilations.
71# We don't consider the file changed if only the date/time changed,
72# unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for
73# reproducible builds with that value referring to a commit timestamp).
74# A kernel config change will increase the generation number, thus
75# causing compile.h to be updated (including date/time) due to the
76# changed comment in the
77# first line.
78
79if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
80 IGNORE_PATTERN="UTS_VERSION"
81else
82 IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED"
83fi
84
85if [ -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
90else
91 echo " UPD $TARGET"
92 mv -f .tmpcompile $TARGET
93fi
94rm -f .tmpver.1 .tmpver.2