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Commit | Line | Data |
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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 |
4b950bb9 TG |
8 | PREEMPT_RT=$5 |
9 | CC=$6 | |
1da177e4 | 10 | |
d03fab43 MF |
11 | vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } |
12 | ||
1da177e4 LT |
13 | # Do not expand names |
14 | set -f | |
15 | ||
87c94bfb SR |
16 | # Fix the language to get consistent output |
17 | LC_ALL=C | |
18 | export LC_ALL | |
19 | ||
20 | if [ -z "$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 | |
37 | LINUX_COMPILE_HOST=`hostname` | |
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 "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi | |
45 | if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi | |
4b950bb9 | 46 | if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi |
1da177e4 LT |
47 | |
48 | # Truncate to maximum length | |
1da177e4 | 49 | UTS_LEN=64 |
e8193650 | 50 | UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)" |
1da177e4 LT |
51 | |
52 | # Generate a temporary compile.h | |
53 | ||
b79c6aa6 | 54 | { echo /\* This file is auto generated, version $VERSION \*/ |
bd5bdd87 | 55 | if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi |
38385f8f | 56 | |
1da177e4 LT |
57 | echo \#define UTS_MACHINE \"$ARCH\" |
58 | ||
e8193650 | 59 | echo \#define UTS_VERSION \"$UTS_VERSION\" |
1da177e4 | 60 | |
c8f3dea9 | 61 | printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY" |
e8193650 | 62 | echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\" |
1da177e4 | 63 | |
adcc3f7c | 64 | echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\" |
b79c6aa6 | 65 | } > .tmpcompile |
1da177e4 LT |
66 | |
67 | # Only replace the real compile.h if the new one is different, | |
68 | # in order to preserve the timestamp and avoid unnecessary | |
69 | # recompilations. | |
70 | # We don't consider the file changed if only the date/time changed. | |
71 | # A kernel config change will increase the generation number, thus | |
38385f8f | 72 | # causing compile.h to be updated (including date/time) due to the |
1da177e4 LT |
73 | # changed comment in the |
74 | # first line. | |
75 | ||
76 | if [ -r $TARGET ] && \ | |
061296dc MM |
77 | grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \ |
78 | grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \ | |
1da177e4 LT |
79 | cmp -s .tmpver.1 .tmpver.2; then |
80 | rm -f .tmpcompile | |
81 | else | |
d03fab43 | 82 | vecho " UPD $TARGET" |
1da177e4 LT |
83 | mv -f .tmpcompile $TARGET |
84 | fi | |
85 | rm -f .tmpver.1 .tmpver.2 |