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