# --- T2-COPYRIGHT-NOTE-BEGIN ---
# T2 SDE: package/*/linux/linux-conf.in
# Copyright (C) 2004 - 2023 The T2 SDE Project
# Copyright (C) 1998 - 2003 ROCK Linux Project
# 
# This Copyright note is generated by scripts/Create-CopyPatch,
# more information can be found in the files COPYING and README.
# 
# This program is free software; you can redistribute it and/or modify
# it under the terms of the GNU General Public License version 2.
# --- T2-COPYRIGHT-NOTE-END ---

if [ ! "$lx_cpu" ]; then
	lx_cpu=`echo $arch | arch2uname |
	sed 's/mips64/mips/;s/bfin/blackfin/;s/aarch64/arm64/;s/hppa.*/parisc/;s/riscv64/riscv/;s/s390x/s390/'`
	# unifications since ~2.6
	lx_cpu=`echo $lx_cpu |
	sed 's/i386/x86/;s/x86_64/x86/;s/ppc.*/powerpc/;s/loongarch64/loongarch/;s/sparc64/sparc/'`
fi
lx_extraversion=""
lx_kernelrelease=""
lx_customconf="\$base/config/$config/linux.cfg"

# cleanups in this fat directory are a bit expensive
nocvsinsrcdir=0
chownsrcdir=0

# inject a possible pre-/ post-release patch
# we filter out .tar`s to avoid trouble with the linuxsh kernel drop-in trees
var_insert patchfiles " " "`match_source_file patch-.* | grep -v '\.tar\.'`"

makeopt="${SDECFG_PARALLEL_MAX:+-j$SDECFG_PARALLEL_MAX}"
var_append makeopt ' ' 'ARCH=$lx_cpu CROSS_COMPILE=$archprefix HOSTCC=cc CC=$KCC'
makeinstopt="$makeopt"

auto_config () {
	if [ -f $base/architecture/$arch/linux.conf ]; then
		echo "  using: architecture/$arch/linux.conf"
		cat  $base/architecture/$arch/linux.conf >> .config
	elif [ -f $base/architecture/$arch/linux.conf.sh ]; then
		echo "  using: architecture/$arch/linux.conf.sh"
		. $base/architecture/$arch/linux.conf.sh >> .config
	elif [ -f $base/architecture/$arch/linux.conf.m4 ]; then
		echo "  using: architecture/$arch/linux.conf.m4"
		m4 -I $base/architecture/$arch -I $base/architecture/share \
		   $base/architecture/$arch/linux.conf.m4 >> .config
	else
		echo "  using: no SDE linux kernel config found"
		cat arch/$lx_cpu/defconfig >> .config
	fi
	case "$SDECFG_OPT" in
	  size*|smart) echo "CONFIG_CC_OPTIMIZE_FOR_SIZE=y" >> .config ;;
	  *) echo "# CONFIG_CC_OPTIMIZE_FOR_SIZE is not set" >> .config ;;
	esac
	cp .config{,.1}

	# all modules needs to be first so modules can be disabled by i.e.
	# the targets later
	echo "Enabling all modules ..."
	yes '' | eval $MAKE $makeopt no2modconfig > /dev/null; cp .config{,.2}

	if [ -f $base/target/$target/linux.conf.sh ]; then
		confscripts="$base/target/$target/linux.conf.sh $confscripts"
	fi

	for x in $confscripts; do
		echo "  running: $x"
		sh $x .config
	done
	cp .config{,.3}

	# merge various text/plain config files
	for x in $base/config/$config/linux.cfg \
	         $base/target/$target/linux.conf; do
	   if [ -f $x ]; then
		echo "  merging: '$x'"
		tag="$(sed '/CONFIG_/ ! d; s,.*CONFIG_\([^ =]*\).*,\1,' \
			$x | tr '\n' '|')"
		egrep -v "\bCONFIG_($tag)\b" < .config > .config.4
		sed 's,\(CONFIG_.*\)=n,# \1 is not set,' \
			$x >> .config.4
		cp .config{.4,}
	   fi
	done

	# create a valid .config
	yes '' | eval $MAKE $makeopt oldconfig > /dev/null; cp .config{,.5}

	# last disable broken stuff
	rm -f /tmp/$$.sed
	list="CONFIG_THIS_DOES_NOT_EXIST"
	for x in $pkg_linux_brokenfiles; do
	    if [ -f "$x" ]; then
		echo "Disable broken file: $x"
		list="$list `tr ' ' '\t' < $x | cut -f1 | grep '^CONFIG_'`"
	    fi
	done
	for x in $list; do
		echo "s,^$x=.\$,# $x is not set,;" >> /tmp/$$.sed
	done

	sed -f /tmp/$$.sed < .config > .config.6
	cp .config{.6,}; rm -f /tmp/$$.sed

	# create a valid .config (dependencies might need to be disabled)
	yes '' | eval $MAKE $makeopt oldconfig > /dev/null

	# save final config
	cp .config{,_modules}

	echo "Creating config without modules ...."
	sed "s,\(CONFIG_.*\)=m,# \1 is not set," .config > .config_new
	mv .config_new .config
	# create a valid .config (dependencies might need to be disabled)
	yes '' | eval $MAKE $makeopt oldconfig > /dev/null
	mv .config .config_nomods

	# which .config to use?
	if [ "$SDECFG_PKG_LINUX_CONFIG_STYLE" = "modules" ]; then
		cp .config{_modules,}
	else
		cp .config{_nomods,}
	fi
}

lx_grabextraversion () {
	local ev
	ev=$(sed -n -e 's,^[ \t]*EXTRAVERSION[ \t]*=[ \t]*\([^ \t]*\),\1,p' Makefile | tail -n 1)
	if [ "$ev" ]; then
		lx_extraversion="${lx_extraversion}${ev}"
		# keep intact but commented since the second EXTRAVERSION
		# definition, and clean the first.
		sed -i -e 's,^\([ \t]*EXTRAVERSION[ \t]*=.*\),#\1,g' \
		       -e 's,^#\(EXTRAVERSION =\).*,\1,' Makefile
	fi
}
lx_injectextraversion () {
	# inject final EXTRAVERSION into Makefile
	sed -i -e "s,^\([ \t]*EXTRAVERSION[ \t]*\)=.*,\1= ${lx_extraversion},g" Makefile

	# update version.h - we only do this, because some other freaky
	# projects like rsbac change EXTRAVERSION in other Makefiles ...
	local rerun=""
	(eval $MAKE $makeopt include/generated/utsrelease.h ||
	  eval $MAKE $makeopt include/linux/utsrelease.h ||
	  eval $MAKE $makeopt include/linux/version.h) |
		grep -q "is up to date" && rerun=1
	if [ "$rerun" ]; then
		echo "WARNING: Your system's timer resolution is too low ..."
		sleep 1; touch Makefile
		eval $MAKE $makeopt include/generated/utsrelease.h ||
		eval $MAKE $makeopt include/linux/utsrelease.h ||
		eval $MAKE $makeopt include/linux/version.h
	fi

	# get kernel_release
	rerun=1
	while true; do
		for fn in include/generated/utsrelease.h \
		          include/linux/utsrelease.h \
	                  include/linux/version.h; do
			[ -f $fn ] && versionh=$fn && break
		done

		lx_kernelrelease="$(echo -e "#include \"$versionh\"\nUTS_RELEASE" |
		                     $KCC -E - | tail -n 1 | cut -d '"' -f 2)"
		if [ -z "$lx_kernelrelease" -a "$rerun" ]; then
			$MAKE $makeopt .kernelrelease include/linux/version.h
			$MAKE $makeopt include/generated/utsrelease.h ||
			$MAKE $makeopt include/linux/utsrelease.h
			rerun=; continue
		fi
		break
	done

	if [ ! "$lx_kernelrelease" -o "$lx_kernelrelease" = "UTS_RELEASE" ]; then
		abort "Could not grab final kernel version!"
	fi
}

lx_filter_patch () {
	local prefix="`sed -n '/^-EXTRAVERSION =/ { s/^-EXTRAVERSION =//p; q }' $1`"
	# whitespace after EXTRAVERSION must be preserve to apply
	expr=
	# only tweak EXTRAVERSION if no space content
	[ "${prefix%% }" ] && var_append expr ';' "s/^-EXTRAVERSION =.*/-EXTRAVERSION =/"
	var_append expr ';' "s/^+EXTRAVERSION = *$prefix/+EXTRAVERSION =/"

	sed -e "$expr" $1
}

lx_patch () {
	echo "Generic linux patching ..."

	# grab extraversion from vanilla
	lx_grabextraversion

	apply_patchfiles lx_grabextraversion lx_filter_patch

	# some arches (avr32, sh64 at the time of writing) have a "defect" Makefile
	# and do not work without a .config ...
	yes '' | eval $MAKE $makeopt oldconfig > /dev/null

	echo "Redefining VERSION  ..."
	lx_extraversion="${lx_extraversion}-t2"
	lx_injectextraversion
	echo "... linux source patching for ${lx_extraversion} finished."

	echo "Clean up the *.orig and *~ files ... "
	rm -f .config.old .config
}

lx_config() {
	echo "Generic linux configuration ..."
	if [ "$SDECFG_PKG_LINUX_CONFIG_STYLE" = none ]; then
		echo "Using $lx_customconf."
		echo "Since automatic generation is disabled ..."
		eval cp -v $lx_customconf .config || true
	else
		echo "Automatically creating default configuration ...."
		auto_config
	fi

	# regrab for stuff like rsbac ... :-(
	lx_injectextraversion

	echo "... configuration of $lx_kernelrelease finished!"
}

pkg_linux_brokenfiles="$base/architecture/$arch/linux-disable.lst \
	$base/package/*/linux/disable-broken.lst \
	$pkg_linux_brokenfiles"