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 |
4b950bb9 TG |
8 | PREEMPT_RT=$5 |
9 | CC=$6 | |
1da177e4 | 10 | |
d03fab43 MF |
11 | vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } |
12 | ||
1da177e4 LT |
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 | ||
264a2683 | 19 | if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then |
d03fab43 | 20 | vecho " SKIPPED $TARGET" |
1da177e4 LT |
21 | exit 0 |
22 | fi | |
23 | ||
24 | # Do not expand names | |
25 | set -f | |
26 | ||
87c94bfb SR |
27 | # Fix the language to get consistent output |
28 | LC_ALL=C | |
29 | export LC_ALL | |
30 | ||
31 | if [ -z "$KBUILD_BUILD_VERSION" ]; then | |
37131ec4 | 32 | VERSION=$(cat .version 2>/dev/null || echo 1) |
1da177e4 | 33 | else |
87c94bfb | 34 | VERSION=$KBUILD_BUILD_VERSION |
1da177e4 LT |
35 | fi |
36 | ||
87c94bfb SR |
37 | if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then |
38 | TIMESTAMP=`date` | |
39 | else | |
40 | TIMESTAMP=$KBUILD_BUILD_TIMESTAMP | |
41 | fi | |
53e6892c | 42 | if test -z "$KBUILD_BUILD_USER"; then |
f0772604 | 43 | LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/') |
53e6892c MM |
44 | else |
45 | LINUX_COMPILE_BY=$KBUILD_BUILD_USER | |
46 | fi | |
47 | if test -z "$KBUILD_BUILD_HOST"; then | |
48 | LINUX_COMPILE_HOST=`hostname` | |
49 | else | |
50 | LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST | |
51 | fi | |
1da177e4 LT |
52 | |
53 | UTS_VERSION="#$VERSION" | |
bd5bdd87 SR |
54 | CONFIG_FLAGS="" |
55 | if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi | |
56 | if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi | |
4b950bb9 | 57 | if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi |
1da177e4 LT |
58 | |
59 | # Truncate to maximum length | |
1da177e4 | 60 | UTS_LEN=64 |
e8193650 | 61 | UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)" |
1da177e4 LT |
62 | |
63 | # Generate a temporary compile.h | |
64 | ||
b79c6aa6 | 65 | { echo /\* This file is auto generated, version $VERSION \*/ |
bd5bdd87 | 66 | if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi |
38385f8f | 67 | |
1da177e4 LT |
68 | echo \#define UTS_MACHINE \"$ARCH\" |
69 | ||
e8193650 | 70 | echo \#define UTS_VERSION \"$UTS_VERSION\" |
1da177e4 | 71 | |
c8f3dea9 | 72 | printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY" |
e8193650 | 73 | echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\" |
1da177e4 | 74 | |
adcc3f7c | 75 | echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\" |
b79c6aa6 | 76 | } > .tmpcompile |
1da177e4 LT |
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 | |
38385f8f | 83 | # causing compile.h to be updated (including date/time) due to the |
1da177e4 LT |
84 | # changed comment in the |
85 | # first line. | |
86 | ||
87 | if [ -r $TARGET ] && \ | |
061296dc MM |
88 | grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \ |
89 | grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \ | |
1da177e4 LT |
90 | cmp -s .tmpver.1 .tmpver.2; then |
91 | rm -f .tmpcompile | |
92 | else | |
d03fab43 | 93 | vecho " UPD $TARGET" |
1da177e4 LT |
94 | mv -f .tmpcompile $TARGET |
95 | fi | |
96 | rm -f .tmpver.1 .tmpver.2 |