blob: a8740df07b09fc1b08c603620bc1ccaaf783199e [file] [log] [blame]
Linus Torvalds1da177e2005-04-16 15:20:36 -07001TARGET=$1
2ARCH=$2
3SMP=$3
Sam Ravnborgbd5bdd82005-07-14 20:18:07 +00004PREEMPT=$4
5CC=$5
Linus Torvalds1da177e2005-04-16 15:20:36 -07006
7# If compile.h exists already and we don't own autoconf.h
8# (i.e. we're not the same user who did make *config), don't
9# modify compile.h
10# So "sudo make install" won't change the "compiled by <user>"
11# do "compiled by root"
12
13if [ -r $TARGET -a ! -O include/linux/autoconf.h ]; then
14 echo " SKIPPED $TARGET"
15 exit 0
16fi
17
18# Do not expand names
19set -f
20
Sam Ravnborg87c94bf2007-04-01 21:49:27 +020021# Fix the language to get consistent output
22LC_ALL=C
23export LC_ALL
24
25if [ -z "$KBUILD_BUILD_VERSION" ]; then
26 if [ -r .version ]; then
27 VERSION=`cat .version`
28 else
29 VERSION=0
30 echo 0 > .version
31 fi
Linus Torvalds1da177e2005-04-16 15:20:36 -070032else
Sam Ravnborg87c94bf2007-04-01 21:49:27 +020033 VERSION=$KBUILD_BUILD_VERSION
Linus Torvalds1da177e2005-04-16 15:20:36 -070034fi
35
Sam Ravnborg87c94bf2007-04-01 21:49:27 +020036if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
37 TIMESTAMP=`date`
38else
39 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
40fi
Linus Torvalds1da177e2005-04-16 15:20:36 -070041
42UTS_VERSION="#$VERSION"
Sam Ravnborgbd5bdd82005-07-14 20:18:07 +000043CONFIG_FLAGS=""
44if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
45if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
Sam Ravnborg87c94bf2007-04-01 21:49:27 +020046UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
Linus Torvalds1da177e2005-04-16 15:20:36 -070047
48# Truncate to maximum length
49
50UTS_LEN=64
51UTS_TRUNCATE="sed -e s/\(.\{1,$UTS_LEN\}\).*/\1/"
52
53# Generate a temporary compile.h
54
55( echo /\* This file is auto generated, version $VERSION \*/
Sam Ravnborgbd5bdd82005-07-14 20:18:07 +000056 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
57
Linus Torvalds1da177e2005-04-16 15:20:36 -070058 echo \#define UTS_MACHINE \"$ARCH\"
59
60 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
61
Sam Ravnborg87c94bf2007-04-01 21:49:27 +020062 echo \#define LINUX_COMPILE_TIME \"`date +%T`\"
Linus Torvalds1da177e2005-04-16 15:20:36 -070063 echo \#define LINUX_COMPILE_BY \"`whoami`\"
64 echo \#define LINUX_COMPILE_HOST \"`hostname | $UTS_TRUNCATE`\"
65
66 if [ -x /bin/dnsdomainname ]; then
67 echo \#define LINUX_COMPILE_DOMAIN \"`dnsdomainname | $UTS_TRUNCATE`\"
68 elif [ -x /bin/domainname ]; then
69 echo \#define LINUX_COMPILE_DOMAIN \"`domainname | $UTS_TRUNCATE`\"
70 else
71 echo \#define LINUX_COMPILE_DOMAIN
72 fi
73
Sam Ravnborg87c94bf2007-04-01 21:49:27 +020074 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | tail -n 1`\"
Linus Torvalds1da177e2005-04-16 15:20:36 -070075) > .tmpcompile
76
77# Only replace the real compile.h if the new one is different,
78# in order to preserve the timestamp and avoid unnecessary
79# recompilations.
80# We don't consider the file changed if only the date/time changed.
81# A kernel config change will increase the generation number, thus
82# causing compile.h to be updated (including date/time) due to the
83# changed comment in the
84# first line.
85
86if [ -r $TARGET ] && \
87 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' $TARGET > .tmpver.1 && \
88 grep -v 'UTS_VERSION\|LINUX_COMPILE_TIME' .tmpcompile > .tmpver.2 && \
89 cmp -s .tmpver.1 .tmpver.2; then
90 rm -f .tmpcompile
91else
92 echo " UPD $TARGET"
93 mv -f .tmpcompile $TARGET
94fi
95rm -f .tmpver.1 .tmpver.2