117c5ca98SFelipe Contreras#!/bin/sh 2b2441318SGreg Kroah-Hartman# SPDX-License-Identifier: GPL-2.0 317c5ca98SFelipe Contreras 41da177e4SLinus TorvaldsTARGET=$1 51da177e4SLinus TorvaldsARCH=$2 61da177e4SLinus TorvaldsSMP=$3 7bd5bdd87SSam RavnborgPREEMPT=$4 8bd5bdd87SSam RavnborgCC=$5 91da177e4SLinus Torvalds 10d03fab43SMike Frysingervecho() { [ "${quiet}" = "silent_" ] || echo "$@" ; } 11d03fab43SMike Frysinger 121da177e4SLinus Torvalds# If compile.h exists already and we don't own autoconf.h 131da177e4SLinus Torvalds# (i.e. we're not the same user who did make *config), don't 141da177e4SLinus Torvalds# modify compile.h 151da177e4SLinus Torvalds# So "sudo make install" won't change the "compiled by <user>" 161da177e4SLinus Torvalds# do "compiled by root" 171da177e4SLinus Torvalds 18264a2683SSam Ravnborgif [ -r $TARGET -a ! -O include/generated/autoconf.h ]; then 19d03fab43SMike Frysinger vecho " SKIPPED $TARGET" 201da177e4SLinus Torvalds exit 0 211da177e4SLinus Torvaldsfi 221da177e4SLinus Torvalds 231da177e4SLinus Torvalds# Do not expand names 241da177e4SLinus Torvaldsset -f 251da177e4SLinus Torvalds 2687c94bfbSSam Ravnborg# Fix the language to get consistent output 2787c94bfbSSam RavnborgLC_ALL=C 2887c94bfbSSam Ravnborgexport LC_ALL 2987c94bfbSSam Ravnborg 3087c94bfbSSam Ravnborgif [ -z "$KBUILD_BUILD_VERSION" ]; then 311da177e4SLinus Torvalds if [ -r .version ]; then 321da177e4SLinus Torvalds VERSION=`cat .version` 331da177e4SLinus Torvalds else 341da177e4SLinus Torvalds VERSION=0 351da177e4SLinus Torvalds echo 0 > .version 361da177e4SLinus Torvalds fi 3787c94bfbSSam Ravnborgelse 3887c94bfbSSam Ravnborg VERSION=$KBUILD_BUILD_VERSION 3987c94bfbSSam Ravnborgfi 401da177e4SLinus Torvalds 4187c94bfbSSam Ravnborgif [ -z "$KBUILD_BUILD_TIMESTAMP" ]; then 4287c94bfbSSam Ravnborg TIMESTAMP=`date` 4387c94bfbSSam Ravnborgelse 4487c94bfbSSam Ravnborg TIMESTAMP=$KBUILD_BUILD_TIMESTAMP 4587c94bfbSSam Ravnborgfi 4653e6892cSMichal Marekif test -z "$KBUILD_BUILD_USER"; then 47f0772604SMarcin Nowakowski LINUX_COMPILE_BY=$(whoami | sed 's/\\/\\\\/') 4853e6892cSMichal Marekelse 4953e6892cSMichal Marek LINUX_COMPILE_BY=$KBUILD_BUILD_USER 5053e6892cSMichal Marekfi 5153e6892cSMichal Marekif test -z "$KBUILD_BUILD_HOST"; then 5253e6892cSMichal Marek LINUX_COMPILE_HOST=`hostname` 5353e6892cSMichal Marekelse 5453e6892cSMichal Marek LINUX_COMPILE_HOST=$KBUILD_BUILD_HOST 5553e6892cSMichal Marekfi 561da177e4SLinus Torvalds 571da177e4SLinus TorvaldsUTS_VERSION="#$VERSION" 58bd5bdd87SSam RavnborgCONFIG_FLAGS="" 59bd5bdd87SSam Ravnborgif [ -n "$SMP" ] ; then CONFIG_FLAGS="SMP"; fi 60bd5bdd87SSam Ravnborgif [ -n "$PREEMPT" ] ; then CONFIG_FLAGS="$CONFIG_FLAGS PREEMPT"; fi 6187c94bfbSSam RavnborgUTS_VERSION="$UTS_VERSION $CONFIG_FLAGS $TIMESTAMP" 621da177e4SLinus Torvalds 631da177e4SLinus Torvalds# Truncate to maximum length 641da177e4SLinus Torvalds 651da177e4SLinus TorvaldsUTS_LEN=64 6617c5ca98SFelipe ContrerasUTS_TRUNCATE="cut -b -$UTS_LEN" 671da177e4SLinus Torvalds 681da177e4SLinus Torvalds# Generate a temporary compile.h 691da177e4SLinus Torvalds 701da177e4SLinus Torvalds( echo /\* This file is auto generated, version $VERSION \*/ 71bd5bdd87SSam Ravnborg if [ -n "$CONFIG_FLAGS" ] ; then echo "/* $CONFIG_FLAGS */"; fi 721da177e4SLinus Torvalds 731da177e4SLinus Torvalds echo \#define UTS_MACHINE \"$ARCH\" 741da177e4SLinus Torvalds 751da177e4SLinus Torvalds echo \#define UTS_VERSION \"`echo $UTS_VERSION | $UTS_TRUNCATE`\" 761da177e4SLinus Torvalds 7753e6892cSMichal Marek echo \#define LINUX_COMPILE_BY \"`echo $LINUX_COMPILE_BY | $UTS_TRUNCATE`\" 7853e6892cSMichal Marek echo \#define LINUX_COMPILE_HOST \"`echo $LINUX_COMPILE_HOST | $UTS_TRUNCATE`\" 791da177e4SLinus Torvalds 80adcc3f7cSJonathan Liu echo \#define LINUX_COMPILER \"`$CC -v 2>&1 | grep ' version ' | sed 's/[[:space:]]*$//'`\" 811da177e4SLinus Torvalds) > .tmpcompile 821da177e4SLinus Torvalds 831da177e4SLinus Torvalds# Only replace the real compile.h if the new one is different, 841da177e4SLinus Torvalds# in order to preserve the timestamp and avoid unnecessary 851da177e4SLinus Torvalds# recompilations. 861da177e4SLinus Torvalds# We don't consider the file changed if only the date/time changed. 871da177e4SLinus Torvalds# A kernel config change will increase the generation number, thus 881da177e4SLinus Torvalds# causing compile.h to be updated (including date/time) due to the 891da177e4SLinus Torvalds# changed comment in the 901da177e4SLinus Torvalds# first line. 911da177e4SLinus Torvalds 921da177e4SLinus Torvaldsif [ -r $TARGET ] && \ 93061296dcSMichal Marek grep -v 'UTS_VERSION' $TARGET > .tmpver.1 && \ 94061296dcSMichal Marek grep -v 'UTS_VERSION' .tmpcompile > .tmpver.2 && \ 951da177e4SLinus Torvalds cmp -s .tmpver.1 .tmpver.2; then 961da177e4SLinus Torvalds rm -f .tmpcompile 971da177e4SLinus Torvaldselse 98d03fab43SMike Frysinger vecho " UPD $TARGET" 991da177e4SLinus Torvalds mv -f .tmpcompile $TARGET 1001da177e4SLinus Torvaldsfi 1011da177e4SLinus Torvaldsrm -f .tmpver.1 .tmpver.2 102