2 # SPDX-License-Identifier: GPL-2.0
10 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
12 # If compile.h exists already and we don't own autoconf.h
13 # (i.e. we're not the same user who did make *config), don't
15 # So "sudo make install" won't change the "compiled by <user>"
16 # do "compiled by root"
18 if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then
19 vecho " SKIPPED $TARGET"
26 # Fix the language to get consistent output
30 if [ -z "$KBUILD_BUILD_VERSION" ]; then
31 VERSION=$(cat .version 2>/dev/null || echo 1)
33 VERSION=$KBUILD_BUILD_VERSION
36 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
39 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
41 if test -z "$KBUILD_BUILD_USER"; then
42 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
44 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
46 if test -z "$KBUILD_BUILD_HOST"; then
47 LINUX_COMPILE_HOST=`hostname`
49 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
52 UTS_VERSION="#$VERSION"
54 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
55 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
56 UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP"
58 # Truncate to maximum length
61 UTS_TRUNCATE="cut -b -$UTS_LEN"
63 # Generate a temporary compile.h
65 ( echo /\* This file is auto generated, version $VERSION \*/
66 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
68 echo \#define UTS_MACHINE \"$ARCH\"
70 echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\"
72 echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\"
73 echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\"
75 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
78 # Only replace the real compile.h if the new one is different,
79 # in order to preserve the timestamp and avoid unnecessary
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
83 # causing compile.h to be updated (including date/time) due to the
84 # changed comment in the
87 if [ -r $TARGET ] && \
88 grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \
89 grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \
90 cmp -s .tmpver.1 .tmpver.2; then
94 mv -f .tmpcompile $TARGET
96 rm -f .tmpver.1 .tmpver.2