2 # SPDX-License-Identifier: GPL-2.0
11 vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; }
16 # Fix the language to get consistent output
20 if [ -z "$KBUILD_BUILD_VERSION" ]; then
21 VERSION=$(cat .version 2>/dev/null || echo 1)
23 VERSION=$KBUILD_BUILD_VERSION
26 if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then
29 TIMESTAMP=$KBUILD_BUILD_TIMESTAMP
31 if test -z "$KBUILD_BUILD_USER"; then
32 LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/')
34 LINUX_COMPILE_BY=$KBUILD_BUILD_USER
36 if test -z "$KBUILD_BUILD_HOST"; then
37 LINUX_COMPILE_HOST=`hostname`
39 LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST
42 UTS_VERSION="#$VERSION"
44 if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi
45 if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi
46 if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi
48 # Truncate to maximum length
50 UTS_VERSION="$(echo $UTS_VERSION $CONFIG_FLAGS $TIMESTAMP | cut -b -$UTS_LEN)"
52 # Generate a temporary compile.h
54 { echo /\* This file is auto generated, version $VERSION \*/
55 if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi
57 echo \#define UTS_MACHINE \"$ARCH\"
59 echo \#define UTS_VERSION \"$UTS_VERSION\"
61 printf '#define LINUX_COMPILE_BY "%s"\n' "$LINUX_COMPILE_BY"
62 echo \#define LINUX_COMPILE_HOST \"$LINUX_COMPILE_HOST\"
64 echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\"
67 # Only replace the real compile.h if the new one is different,
68 # in order to preserve the timestamp and avoid unnecessary
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
72 # causing compile.h to be updated (including date/time) due to the
73 # changed comment in the
76 if [ -r $TARGET ] && \
77 grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \
78 grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \
79 cmp -s .tmpver.1 .tmpver.2; then
83 mv -f .tmpcompile $TARGET
85 rm -f .tmpver.1 .tmpver.2