9 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
11 # If compile.h exists already and we don't own autoconf.h
12 # (i.e. we're not the same user who did make *config), don't
14 # So "sudo make install" won't change the "compiled by <user>"
15 # do "compiled by root"
17 if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
18 vecho " SKIPPED $TARGET"
25 # Fix the language to get consistent output
29 if [ -z "$KBUILD_BUILD_VERSION" ]; then
30 if [ -r .version ]; then
31 VERSION=`cat .version`
37 VERSION=$KBUILD_BUILD_VERSION
40 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
43 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
45 if test -z "$KBUILD_BUILD_USER"; then
46 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
48 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
50 if test -z "$KBUILD_BUILD_HOST"; then
51 LINUX_COMPILE_HOST=`hostname`
53 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
56 UTS_VERSION="#$VERSION"
58 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
59 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
60 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
62 # Truncate to maximum length
65 UTS_TRUNCATE="cut -b -$UTS_LEN"
67 # Generate a temporary compile.h
69 ( echo /\* This file is auto generated, version $VERSION \*/
70 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
72 echo \#define UTS_MACHINE \"$ARCH\"
74 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
76 echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
77 echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
79 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version '`\"
82 # Only replace the real compile.h if the new one is different,
83 # in order to preserve the timestamp and avoid unnecessary
85 # We don't consider the file changed if only the date/time changed,
86 # unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for
87 # reproducible builds with that value referring to a commit timestamp).
88 # A kernel config change will increase the generation number, thus
89 # causing compile.h to be updated (including date/time) due to the
90 # changed comment in the
93 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
94 IGNORE_PATTERN="UTS_VERSION"
96 IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED"
99 if [ -r $TARGET ] && \
100 grep -v $IGNORE_PATTERN $TARGET > .tmpver.1 && \
101 grep -v $IGNORE_PATTERN .tmpcompile > .tmpver.2 && \
102 cmp -s .tmpver.1 .tmpver.2; then
106 mv -f .tmpcompile $TARGET
108 rm -f .tmpver.1 .tmpver.2