| #!/bin/sh |
| # SPDX-License-Identifier: GPL-2.0 |
| |
| TARGET=$1 |
| ARCH=$2 |
| SMP=$3 |
| PREEMPT=$4 |
| PREEMPT_RT=$5 |
| CC=$6 |
| |
| vecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } |
| |
| # If compile.h exists already and we don't own autoconf.h |
| # (i.e. we're not the same user who did make *config), don't |
| # modify compile.h |
| # So "sudo make install" won't change the "compiled by <user>" |
| # do "compiled by root" |
| |
| if [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then |
| vecho " SKIPPED $TARGET" |
| exit 0 |
| fi |
| |
| # Do not expand names |
| set -f |
| |
| # Fix the language to get consistent output |
| LC_ALL=C |
| export LC_ALL |
| |
| if [ -z "$KBUILD_BUILD_VERSION" ]; then |
| VERSION=$(cat .version 2>/dev/null || echo 1) |
| else |
| VERSION=$KBUILD_BUILD_VERSION |
| fi |
| |
| if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then |
| TIMESTAMP=`date` |
| else |
| TIMESTAMP=$KBUILD_BUILD_TIMESTAMP |
| fi |
| if test -z "$KBUILD_BUILD_USER"; then |
| LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/') |
| else |
| LINUX_COMPILE_BY=$KBUILD_BUILD_USER |
| fi |
| if test -z "$KBUILD_BUILD_HOST"; then |
| LINUX_COMPILE_HOST=`hostname` |
| else |
| LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST |
| fi |
| |
| UTS_VERSION="#$VERSION" |
| CONFIG_FLAGS="" |
| if [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi |
| if [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi |
| if [ -n "$PREEMPT_RT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT_RT"; fi |
| UTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" |
| |
| # Truncate to maximum length |
| |
| UTS_LEN=64 |
| UTS_TRUNCATE="cut -b -$UTS_LEN" |
| |
| # Generate a temporary compile.h |
| |
| { echo /\* This file is auto generated, version $VERSION \*/ |
| if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi |
| |
| echo \#define UTS_MACHINE \"$ARCH\" |
| |
| echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" |
| |
| echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\" |
| echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\" |
| |
| echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\" |
| } > .tmpcompile |
| |
| # Only replace the real compile.h if the new one is different, |
| # in order to preserve the timestamp and avoid unnecessary |
| # recompilations. |
| # We don't consider the file changed if only the date/time changed, |
| # unless KBUILD_BUILD_TIMESTAMP was explicitly set (e.g. for |
| # reproducible builds with that value referring to a commit timestamp). |
| # A kernel config change will increase the generation number, thus |
| # causing compile.h to be updated (including date/time) due to the |
| # changed comment in the |
| # first line. |
| |
| if [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then |
| IGNORE_PATTERN="UTS_VERSION" |
| else |
| IGNORE_PATTERN="NOT_A_PATTERN_TO_BE_MATCHED" |
| fi |
| |
| if [ -r $TARGET ] && \ |
| grep -v $IGNORE_PATTERN $TARGET > .tmpver.1 && \ |
| grep -v $IGNORE_PATTERN .tmpcompile > .tmpver.2 && \ |
| cmp -s .tmpver.1 .tmpver.2; then |
| rm -f .tmpcompile |
| else |
| vecho " UPD $TARGET" |
| mv -f .tmpcompile $TARGET |
| fi |
| rm -f .tmpver.1 .tmpver.2 |