Commit | Line | Data |
---|---|---|
17c5ca98 | 1 | #!/bin/sh |
b2441318 | 2 | # SPDX-License-Identifier: GPL-2.0 |
17c5ca98 | 3 | |
1da177e4 LT |
4 | TARGET=$1 |
5 | ARCH=$2 | |
6 | SMP=$3 | |
bd5bdd87 | 7 | PREEMPT=$4 |
a0a7e453 FW |
8 | PREEMPT_DYNAMIC=$5 |
9 | PREEMPT_RT=$6 | |
10 | CC_VERSION="$7" | |
11 | LD=$8 | |
1da177e4 | 12 | |
1da177e4 LT |
13 | # Do not expand names |
14 | set -f | |
15 | ||
87c94bfb SR |
16 | # Fix the language to get consistent output |
17 | LC_ALL=C | |
18 | export LC_ALL | |
19 | ||
20 | if [ -z "$KBUILD_BUILD_VERSION" ]; then | |
37131ec4 | 21 | VERSION=$(cat .version 2>/dev/null || echo 1) |
1da177e4 | 22 | else |
87c94bfb | 23 | VERSION=$KBUILD_BUILD_VERSION |
1da177e4 LT |
24 | fi |
25 | ||
87c94bfb SR |
26 | if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then |
27 | TIMESTAMP=`date` | |
28 | else | |
29 | TIMESTAMP=$KBUILD_BUILD_TIMESTAMP | |
30 | fi | |
53e6892c | 31 | if test -z "$KBUILD_BUILD_USER"; then |
f0772604 | 32 | LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/') |
53e6892c MM |
33 | else |
34 | LINUX_COMPILE_BY=$KBUILD_BUILD_USER | |
35 | fi | |
36 | if test -z "$KBUILD_BUILD_HOST"; then | |
1e66d50a | 37 | LINUX_COMPILE_HOST=`uname -n` |
53e6892c MM |
38 | else |
39 | LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST | |
40 | fi | |
1da177e4 LT |
41 | |
42 | UTS_VERSION="#$VERSION" | |
bd5bdd87 SR |
43 | CONFIG_FLAGS="" |
44 | if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi | |
a0a7e453 FW |
45 | |
46 | if [ -n "$PREEMPT_RT" ] ; then | |
47 | CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT" | |
48 | elif [ -n "$PREEMPT_DYNAMIC" ] ; then | |
49 | CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_DYNAMIC" | |
50 | elif [ -n "$PREEMPT" ] ; then | |
51 | CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT" | |
52 | fi | |
1da177e4 LT |
53 | |
54 | # Truncate to maximum length | |
1da177e4 | 55 | UTS_LEN=64 |
e8193650 | 56 | UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)" |
1da177e4 LT |
57 | |
58 | # Generate a temporary compile.h | |
59 | ||
b79c6aa6 | 60 | { echo /\* This file is auto generated, version $VERSION \*/ |
bd5bdd87 | 61 | if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi |
38385f8f | 62 | |
1da177e4 LT |
63 | echo \#define UTS_MACHINE \"$ARCH\" |
64 | ||
e8193650 | 65 | echo \#define UTS_VERSION \"$UTS_VERSION\" |
1da177e4 | 66 | |
c8f3dea9 | 67 | printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY" |
e8193650 | 68 | echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\" |
1da177e4 | 69 | |
4dcc9a88 KC |
70 | LD_VERSION=$($LD -v | head -n1 | sed 's/(compatible with [^)]*)//' \ |
71 | | sed 's/[[:space:]]*$//') | |
72 | printf '#define LINUX_COMPILER "%s"\n' "$CC_VERSION, $LD_VERSION" | |
b79c6aa6 | 73 | } > .tmpcompile |
1da177e4 LT |
74 | |
75 | # Only replace the real compile.h if the new one is different, | |
76 | # in order to preserve the timestamp and avoid unnecessary | |
77 | # recompilations. | |
a979522a MM |
78 | # We don't consider the file changed if only the date/time changed, |
79 | # unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for | |
80 | # reproducible builds with that value referring to a commit timestamp). | |
1da177e4 | 81 | # A kernel config change will increase the generation number, thus |
38385f8f | 82 | # causing compile.h to be updated (including date/time) due to the |
1da177e4 LT |
83 | # changed comment in the |
84 | # first line. | |
85 | ||
a979522a MM |
86 | if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then |
87 | IGNORE_PATTERN="UTS_VERSION" | |
88 | else | |
89 | IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED" | |
90 | fi | |
91 | ||
1da177e4 | 92 | if [ -r $TARGET ] && \ |
a979522a MM |
93 | grep -v $IGNORE_PATTERN $TARGET > .tmpver.1 && \ |
94 | grep -v $IGNORE_PATTERN .tmpcompile > .tmpver.2 && \ | |
1da177e4 LT |
95 | cmp -s .tmpver.1 .tmpver.2; then |
96 | rm -f .tmpcompile | |
97 | else | |
c39013ee | 98 | echo " UPD $TARGET" |
1da177e4 LT |
99 | mv -f .tmpcompile $TARGET |
100 | fi | |
101 | rm -f .tmpver.1 .tmpver.2 |