diff --git a/lib/compilation.sh b/lib/compilation.sh
deleted file mode 100644
index e3f6e3bf18..0000000000
--- a/lib/compilation.sh
+++ /dev/null
@@ -1,1158 +0,0 @@
-#!/bin/bash
-#
-# Copyright (c) 2013-2021 Igor Pecovnik, igor.pecovnik@gma**.com
-#
-# This file is licensed under the terms of the GNU General Public
-# License version 2. This program is licensed "as is" without any
-# warranty of any kind, whether express or implied.
-#
-# This file is a part of the Armbian build script
-# https://github.com/armbian/build/
-
-# Functions:
-
-# compile_atf
-# compile_uboot
-# compile_kernel
-# compile_firmware
-# compile_armbian-config
-# compile_xilinx_bootgen
-# grab_version
-# find_toolchain
-# advanced_patch
-# process_patch_file
-# userpatch_create
-# overlayfs_wrapper
-
-
-
-
-compile_atf()
-{
-	if [[ $CLEAN_LEVEL == *make* ]]; then
-		display_alert "Cleaning" "$ATFSOURCEDIR" "info"
-		(cd "${SRC}/cache/sources/${ATFSOURCEDIR}"; make distclean > /dev/null 2>&1)
-	fi
-
-	if [[ $USE_OVERLAYFS == yes ]]; then
-		local atfdir
-		atfdir=$(overlayfs_wrapper "wrap" "$SRC/cache/sources/$ATFSOURCEDIR" "atf_${LINUXFAMILY}_${BRANCH}")
-	else
-		local atfdir="$SRC/cache/sources/$ATFSOURCEDIR"
-	fi
-	cd "$atfdir" || exit
-
-	display_alert "Compiling ATF" "" "info"
-
-# build aarch64
-  if [[ $(dpkg --print-architecture) == amd64 ]]; then
-
-	local toolchain
-	toolchain=$(find_toolchain "$ATF_COMPILER" "$ATF_USE_GCC")
-	[[ -z $toolchain ]] && exit_with_error "Could not find required toolchain" "${ATF_COMPILER}gcc $ATF_USE_GCC"
-
-	if [[ -n $ATF_TOOLCHAIN2 ]]; then
-		local toolchain2_type toolchain2_ver toolchain2
-		toolchain2_type=$(cut -d':' -f1 <<< "${ATF_TOOLCHAIN2}")
-		toolchain2_ver=$(cut -d':' -f2 <<< "${ATF_TOOLCHAIN2}")
-		toolchain2=$(find_toolchain "$toolchain2_type" "$toolchain2_ver")
-		[[ -z $toolchain2 ]] && exit_with_error "Could not find required toolchain" "${toolchain2_type}gcc $toolchain2_ver"
-	fi
-
-# build aarch64
-  fi
-
-	display_alert "Compiler version" "${ATF_COMPILER}gcc $(eval env PATH="${toolchain}:${PATH}" "${ATF_COMPILER}gcc" -dumpversion)" "info"
-
-	local target_make target_patchdir target_files
-	target_make=$(cut -d';' -f1 <<< "${ATF_TARGET_MAP}")
-	target_patchdir=$(cut -d';' -f2 <<< "${ATF_TARGET_MAP}")
-	target_files=$(cut -d';' -f3 <<< "${ATF_TARGET_MAP}")
-
-	advanced_patch "atf" "${ATFPATCHDIR}" "$BOARD" "$target_patchdir" "$BRANCH" "${LINUXFAMILY}-${BOARD}-${BRANCH}"
-
-	# create patch for manual source changes
-	[[ $CREATE_PATCHES == yes ]] && userpatch_create "atf"
-
-	echo -e "\n\t==  atf  ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
-	# ENABLE_BACKTRACE="0" has been added to workaround a regression in ATF.
-	# Check: https://github.com/armbian/build/issues/1157
-	eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${toolchain2}:${PATH}" \
-		'make ENABLE_BACKTRACE="0" $target_make $CTHREADS \
-		CROSS_COMPILE="$CCACHE $ATF_COMPILER"' 2>> "${DEST}"/${LOG_SUBPATH}/compilation.log \
-		${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
-		${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" --progressbox "Compiling ATF..." $TTY_Y $TTY_X'} \
-		${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
-
-	[[ ${PIPESTATUS[0]} -ne 0 ]] && exit_with_error "ATF compilation failed"
-
-	[[ $(type -t atf_custom_postprocess) == function ]] && atf_custom_postprocess
-
-	atftempdir=$(mktemp -d)
-	chmod 700 ${atftempdir}
-	trap "ret=\$?; rm -rf \"${atftempdir}\" ; exit \$ret" 0 1 2 3 15
-
-	# copy files to temp directory
-	for f in $target_files; do
-		local f_src
-		f_src=$(cut -d':' -f1 <<< "${f}")
-		if [[ $f == *:* ]]; then
-			local f_dst
-			f_dst=$(cut -d':' -f2 <<< "${f}")
-		else
-			local f_dst
-			f_dst=$(basename "${f_src}")
-		fi
-		[[ ! -f $f_src ]] && exit_with_error "ATF file not found" "$(basename "${f_src}")"
-		cp "${f_src}" "${atftempdir}/${f_dst}"
-	done
-
-	# copy license file to pack it to u-boot package later
-	[[ -f license.md ]] && cp license.md "${atftempdir}"/
-}
-
-
-
-
-compile_uboot()
-{
-	# not optimal, but extra cleaning before overlayfs_wrapper should keep sources directory clean
-	if [[ $CLEAN_LEVEL == *make* ]]; then
-		display_alert "Cleaning" "$BOOTSOURCEDIR" "info"
-		(cd "${SRC}/cache/sources/${BOOTSOURCEDIR}"; make clean > /dev/null 2>&1)
-	fi
-
-	if [[ $USE_OVERLAYFS == yes ]]; then
-		local ubootdir
-		ubootdir=$(overlayfs_wrapper "wrap" "$SRC/cache/sources/$BOOTSOURCEDIR" "u-boot_${LINUXFAMILY}_${BRANCH}")
-	else
-		local ubootdir="$SRC/cache/sources/$BOOTSOURCEDIR"
-	fi
-	cd "${ubootdir}" || exit
-
-	# read uboot version
-	local version hash
-	version=$(grab_version "$ubootdir")
-	hash=$(improved_git --git-dir="$ubootdir"/.git rev-parse HEAD)
-
-	display_alert "Compiling u-boot" "$version" "info"
-
-# build aarch64
-  if [[ $(dpkg --print-architecture) == amd64 ]]; then
-
-	local toolchain
-	toolchain=$(find_toolchain "$UBOOT_COMPILER" "$UBOOT_USE_GCC")
-	[[ -z $toolchain ]] && exit_with_error "Could not find required toolchain" "${UBOOT_COMPILER}gcc $UBOOT_USE_GCC"
-
-	if [[ -n $UBOOT_TOOLCHAIN2 ]]; then
-		local toolchain2_type toolchain2_ver toolchain2
-		toolchain2_type=$(cut -d':' -f1 <<< "${UBOOT_TOOLCHAIN2}")
-		toolchain2_ver=$(cut -d':' -f2 <<< "${UBOOT_TOOLCHAIN2}")
-		toolchain2=$(find_toolchain "$toolchain2_type" "$toolchain2_ver")
-		[[ -z $toolchain2 ]] && exit_with_error "Could not find required toolchain" "${toolchain2_type}gcc $toolchain2_ver"
-	fi
-
-# build aarch64
-  fi
-
-	display_alert "Compiler version" "${UBOOT_COMPILER}gcc $(eval env PATH="${toolchain}:${toolchain2}:${PATH}" "${UBOOT_COMPILER}gcc" -dumpversion)" "info"
-	[[ -n $toolchain2 ]] && display_alert "Additional compiler version" "${toolchain2_type}gcc $(eval env PATH="${toolchain}:${toolchain2}:${PATH}" "${toolchain2_type}gcc" -dumpversion)" "info"
-
-	# create directory structure for the .deb package
-	uboottempdir=$(mktemp -d)
-	chmod 700 ${uboottempdir}
-	trap "ret=\$?; rm -rf \"${uboottempdir}\" ; exit \$ret" 0 1 2 3 15
-	local uboot_name=${CHOSEN_UBOOT}_${REVISION}_${ARCH}
-	rm -rf $uboottempdir/$uboot_name
-	mkdir -p $uboottempdir/$uboot_name/usr/lib/{u-boot,$uboot_name} $uboottempdir/$uboot_name/DEBIAN
-
-	# process compilation for one or multiple targets
-	while read -r target; do
-		local target_make target_patchdir target_files
-		target_make=$(cut -d';' -f1 <<< "${target}")
-		target_patchdir=$(cut -d';' -f2 <<< "${target}")
-		target_files=$(cut -d';' -f3 <<< "${target}")
-
-		# needed for multiple targets and for calling compile_uboot directly
-		display_alert "Checking out to clean sources"
-		improved_git checkout -f -q HEAD
-
-		if [[ $CLEAN_LEVEL == *make* ]]; then
-			display_alert "Cleaning" "$BOOTSOURCEDIR" "info"
-			(cd "${SRC}/cache/sources/${BOOTSOURCEDIR}"; make clean > /dev/null 2>&1)
-		fi
-
-		advanced_patch "u-boot" "$BOOTPATCHDIR" "$BOARD" "$target_patchdir" "$BRANCH" "${LINUXFAMILY}-${BOARD}-${BRANCH}"
-
-		# create patch for manual source changes
-		[[ $CREATE_PATCHES == yes ]] && userpatch_create "u-boot"
-
-		if [[ -n $ATFSOURCE ]]; then
-			cp -Rv "${atftempdir}"/*.bin . 2>/dev/null || \
-			cp -Rv "${atftempdir}"/*.elf . 2>/dev/null
-			[[ $? -ne 0 ]] && exit_with_error "ATF binary not found"
-			rm -rf "${atftempdir}"
-		fi
-
-		echo -e "\n\t== u-boot make $BOOTCONFIG ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
-		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${toolchain2}:${PATH}" \
-			'make $CTHREADS $BOOTCONFIG \
-			CROSS_COMPILE="$CCACHE $UBOOT_COMPILER"' 2>> "${DEST}"/${LOG_SUBPATH}/compilation.log \
-			${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
-			${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
-
-		# armbian specifics u-boot settings
-		[[ -f .config ]] && sed -i 's/CONFIG_LOCALVERSION=""/CONFIG_LOCALVERSION="-armbian"/g' .config
-		[[ -f .config ]] && sed -i 's/CONFIG_LOCALVERSION_AUTO=.*/# CONFIG_LOCALVERSION_AUTO is not set/g' .config
-
-		# for modern kernel and non spi targets
-		if [[ ${BOOTBRANCH} =~ ^tag:v201[8-9](.*) && ${target} != "spi" && -f .config ]]; then
-
-			sed -i 's/^.*CONFIG_ENV_IS_IN_FAT.*/# CONFIG_ENV_IS_IN_FAT is not set/g' .config
-			sed -i 's/^.*CONFIG_ENV_IS_IN_EXT4.*/CONFIG_ENV_IS_IN_EXT4=y/g' .config
-			sed -i 's/^.*CONFIG_ENV_IS_IN_MMC.*/# CONFIG_ENV_IS_IN_MMC is not set/g' .config
-			sed -i 's/^.*CONFIG_ENV_IS_NOWHERE.*/# CONFIG_ENV_IS_NOWHERE is not set/g' .config | echo \
-			"# CONFIG_ENV_IS_NOWHERE is not set" >> .config
-			echo 'CONFIG_ENV_EXT4_INTERFACE="mmc"' >> .config
-			echo 'CONFIG_ENV_EXT4_DEVICE_AND_PART="0:auto"' >> .config
-			echo 'CONFIG_ENV_EXT4_FILE="/boot/boot.env"' >> .config
-
-		fi
-
-		[[ -f tools/logos/udoo.bmp ]] && cp "${SRC}"/packages/blobs/splash/udoo.bmp tools/logos/udoo.bmp
-		touch .scmversion
-
-		# $BOOTDELAY can be set in board family config, ensure autoboot can be stopped even if set to 0
-		[[ $BOOTDELAY == 0 ]] && echo -e "CONFIG_ZERO_BOOTDELAY_CHECK=y" >> .config
-		[[ -n $BOOTDELAY ]] && sed -i "s/^CONFIG_BOOTDELAY=.*/CONFIG_BOOTDELAY=${BOOTDELAY}/" .config || [[ -f .config ]] && echo "CONFIG_BOOTDELAY=${BOOTDELAY}" >> .config
-
-		# workaround when two compilers are needed
-		cross_compile="CROSS_COMPILE=$CCACHE $UBOOT_COMPILER";
-		[[ -n $UBOOT_TOOLCHAIN2 ]] && cross_compile="ARMBIAN=foe"; # empty parameter is not allowed
-
-		echo -e "\n\t== u-boot make $target_make ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
-		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${toolchain2}:${PATH}" \
-			'make $target_make $CTHREADS \
-			"${cross_compile}"' 2>>"${DEST}"/${LOG_SUBPATH}/compilation.log \
-			${PROGRESS_LOG_TO_FILE:+' | tee -a "${DEST}"/${LOG_SUBPATH}/compilation.log'} \
-			${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" --progressbox "Compiling u-boot..." $TTY_Y $TTY_X'} \
-			${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'} ';EVALPIPE=(${PIPESTATUS[@]})'
-
-		[[ ${EVALPIPE[0]} -ne 0 ]] && exit_with_error "U-boot compilation failed"
-
-		[[ $(type -t uboot_custom_postprocess) == function ]] && uboot_custom_postprocess
-
-		# copy files to build directory
-		for f in $target_files; do
-			local f_src
-			f_src=$(cut -d':' -f1 <<< "${f}")
-			if [[ $f == *:* ]]; then
-				local f_dst
-				f_dst=$(cut -d':' -f2 <<< "${f}")
-			else
-				local f_dst
-				f_dst=$(basename "${f_src}")
-			fi
-			[[ ! -f $f_src ]] && exit_with_error "U-boot file not found" "$(basename "${f_src}")"
-			cp "${f_src}" "$uboottempdir/${uboot_name}/usr/lib/${uboot_name}/${f_dst}"
-		done
-	done <<< "$UBOOT_TARGET_MAP"
-
-	# set up postinstall script
-	if [[ $BOARD == tinkerboard ]]; then
-		cat <<-EOF > "$uboottempdir/${uboot_name}/DEBIAN/postinst"
-		#!/bin/bash
-		source /usr/lib/u-boot/platform_install.sh
-		[[ \$DEVICE == /dev/null ]] && exit 0
-		if [[ -z \$DEVICE ]]; then
-			DEVICE="/dev/mmcblk0"
-			# proceed to other options.
-			[ ! -b \$DEVICE ] && DEVICE="/dev/mmcblk1"
-			[ ! -b \$DEVICE ] && DEVICE="/dev/mmcblk2"
-		fi
-		[[ \$(type -t setup_write_uboot_platform) == function ]] && setup_write_uboot_platform
-		if [[ -b \$DEVICE ]]; then
-			echo "Updating u-boot on \$DEVICE" >&2
-			write_uboot_platform \$DIR \$DEVICE
-			sync
-		else
-			echo "Device \$DEVICE does not exist, skipping" >&2
-		fi
-		exit 0
-		EOF
-		chmod 755 "$uboottempdir/${uboot_name}/DEBIAN/postinst"
-	fi
-
-	# declare -f on non-defined function does not do anything
-	cat <<-EOF > "$uboottempdir/${uboot_name}/usr/lib/u-boot/platform_install.sh"
-	DIR=/usr/lib/$uboot_name
-	$(declare -f write_uboot_platform)
-	$(declare -f write_uboot_platform_mtd)
-	$(declare -f setup_write_uboot_platform)
-	EOF
-
-	# set up control file
-	cat <<-EOF > "$uboottempdir/${uboot_name}/DEBIAN/control"
-	Package: linux-u-boot-${BOARD}-${BRANCH}
-	Version: $REVISION
-	Architecture: $ARCH
-	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
-	Installed-Size: 1
-	Section: kernel
-	Priority: optional
-	Provides: armbian-u-boot
-	Replaces: armbian-u-boot
-	Conflicts: armbian-u-boot, u-boot-sunxi
-	Description: Uboot loader $version
-	EOF
-
-	# copy config file to the package
-	# useful for FEL boot with overlayfs_wrapper
-	[[ -f .config && -n $BOOTCONFIG ]] && cp .config "$uboottempdir/${uboot_name}/usr/lib/u-boot/${BOOTCONFIG}"
-	# copy license files from typical locations
-	[[ -f COPYING ]] && cp COPYING "$uboottempdir/${uboot_name}/usr/lib/u-boot/LICENSE"
-	[[ -f Licenses/README ]] && cp Licenses/README "$uboottempdir/${uboot_name}/usr/lib/u-boot/LICENSE"
-	[[ -n $atftempdir && -f $atftempdir/license.md ]] && cp "${atftempdir}/license.md" "$uboottempdir/${uboot_name}/usr/lib/u-boot/LICENSE.atf"
-
-	display_alert "Building deb" "${uboot_name}.deb" "info"
-	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "$uboottempdir/${uboot_name}" "$uboottempdir/${uboot_name}.deb" >> "${DEST}"/${LOG_SUBPATH}/output.log 2>&1
-	rm -rf "$uboottempdir/${uboot_name}"
-	[[ -n $atftempdir ]] && rm -rf "${atftempdir}"
-
-	[[ ! -f $uboottempdir/${uboot_name}.deb ]] && exit_with_error "Building u-boot package failed"
-
-	rsync --remove-source-files -rq "$uboottempdir/${uboot_name}.deb" "${DEB_STORAGE}/"
-	rm -rf "$uboottempdir"
-}
-
-create_linux-source_package ()
-{
-	ts=$(date +%s)
-	local sources_pkg_dir tmp_src_dir
-	tmp_src_dir=$(mktemp -d)
-	trap "ret=\$?; rm -rf \"${tmp_src_dir}\" ; exit \$ret" 0 1 2 3 15
-	sources_pkg_dir=${tmp_src_dir}/${CHOSEN_KSRC}_${REVISION}_all
-	mkdir -p "${sources_pkg_dir}"/usr/src/ \
-		"${sources_pkg_dir}"/usr/share/doc/linux-source-${version}-${LINUXFAMILY} \
-		"${sources_pkg_dir}"/DEBIAN
-
-	cp "${SRC}/config/kernel/${LINUXCONFIG}.config" "default_${LINUXCONFIG}.config"
-	xz < .config > "${sources_pkg_dir}/usr/src/${LINUXCONFIG}_${version}_${REVISION}_config.xz"
-
-	display_alert "Compressing sources for the linux-source package"
-	tar cp --directory="$kerneldir" --exclude='.git' --owner=root . \
-		| pv -p -b -r -s "$(du -sb "$kerneldir" --exclude=='.git' | cut -f1)" \
-		| pixz -4 > "${sources_pkg_dir}/usr/src/linux-source-${version}-${LINUXFAMILY}.tar.xz"
-	cp COPYING "${sources_pkg_dir}/usr/share/doc/linux-source-${version}-${LINUXFAMILY}/LICENSE"
-
-	cat <<-EOF > "${sources_pkg_dir}"/DEBIAN/control
-	Package: linux-source-${version}-${BRANCH}-${LINUXFAMILY}
-	Version: ${version}-${BRANCH}-${LINUXFAMILY}+${REVISION}
-	Architecture: all
-	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
-	Section: kernel
-	Priority: optional
-	Depends: binutils, coreutils
-	Provides: linux-source, linux-source-${version}-${LINUXFAMILY}
-	Recommends: gcc, make
-	Description: This package provides the source code for the Linux kernel $version
-	EOF
-
-	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} -z0 "${sources_pkg_dir}" "${sources_pkg_dir}.deb"
-	rsync --remove-source-files -rq "${sources_pkg_dir}.deb" "${DEB_STORAGE}/"
-
-	te=$(date +%s)
-	display_alert "Make the linux-source package" "$(($te - $ts)) sec." "info"
-	rm -rf "${tmp_src_dir}"
-}
-
-compile_kernel()
-{
-	if [[ $CLEAN_LEVEL == *make* ]]; then
-		display_alert "Cleaning" "$LINUXSOURCEDIR" "info"
-		(cd "${SRC}/cache/sources/${LINUXSOURCEDIR}"; make ARCH="${ARCHITECTURE}" clean >/dev/null 2>&1)
-	fi
-
-	if [[ $USE_OVERLAYFS == yes ]]; then
-		local kerneldir
-		kerneldir=$(overlayfs_wrapper "wrap" "$SRC/cache/sources/$LINUXSOURCEDIR" "kernel_${LINUXFAMILY}_${BRANCH}")
-	else
-		local kerneldir="$SRC/cache/sources/$LINUXSOURCEDIR"
-	fi
-	cd "${kerneldir}" || exit
-
-	rm -f localversion
-
-	# read kernel version
-	local version hash
-	version=$(grab_version "$kerneldir")
-
-	# read kernel git hash
-	hash=$(improved_git --git-dir="$kerneldir"/.git rev-parse HEAD)
-
-	# Apply a series of patches if a series file exists
-	if test -f "${SRC}"/patch/kernel/${KERNELPATCHDIR}/series.conf; then
-		display_alert "series.conf file visible. Apply"
-		series_conf="${SRC}"/patch/kernel/${KERNELPATCHDIR}/series.conf
-
-		# apply_patch_series <target dir> <full path to series file>
-		apply_patch_series "${kerneldir}" "$series_conf"
-	fi
-
-	# build 3rd party drivers
-	compilation_prepare
-
-	advanced_patch "kernel" "$KERNELPATCHDIR" "$BOARD" "" "$BRANCH" "$LINUXFAMILY-$BRANCH"
-
-	# create patch for manual source changes in debug mode
-	[[ $CREATE_PATCHES == yes ]] && userpatch_create "kernel"
-
-	# re-read kernel version after patching
-	local version
-	version=$(grab_version "$kerneldir")
-
-	display_alert "Compiling $BRANCH kernel" "$version" "info"
-
-	# compare with the architecture of the current Debian node
-	# if it matches we use the system compiler
-	if $(dpkg-architecture -e "${ARCH}"); then
-		display_alert "Native compilation"
-	elif [[ $(dpkg --print-architecture) == amd64 ]]; then
-		local toolchain
-		toolchain=$(find_toolchain "$KERNEL_COMPILER" "$KERNEL_USE_GCC")
-		[[ -z $toolchain ]] && exit_with_error "Could not find required toolchain" "${KERNEL_COMPILER}gcc $KERNEL_USE_GCC"
-	else
-		exit_with_error "Architecture [$ARCH] is not supported"
-	fi
-
-	display_alert "Compiler version" "${KERNEL_COMPILER}gcc $(eval env PATH="${toolchain}:${PATH}" "${KERNEL_COMPILER}gcc" -dumpversion)" "info"
-
-	# copy kernel config
-	if [[ $KERNEL_KEEP_CONFIG == yes && -f "${DEST}"/config/$LINUXCONFIG.config ]]; then
-		display_alert "Using previous kernel config" "${DEST}/config/$LINUXCONFIG.config" "info"
-		cp -p "${DEST}/config/${LINUXCONFIG}.config" .config
-	else
-		if [[ -f $USERPATCHES_PATH/$LINUXCONFIG.config ]]; then
-			display_alert "Using kernel config provided by user" "userpatches/$LINUXCONFIG.config" "info"
-			cp -p "${USERPATCHES_PATH}/${LINUXCONFIG}.config" .config
-		else
-			display_alert "Using kernel config file" "config/kernel/$LINUXCONFIG.config" "info"
-			cp -p "${SRC}/config/kernel/${LINUXCONFIG}.config" .config
-		fi
-	fi
-
-	call_extension_method "custom_kernel_config" << 'CUSTOM_KERNEL_CONFIG'
-*Kernel .config is in place, still clean from git version*
-Called after ${LINUXCONFIG}.config is put in place (.config).
-Before any olddefconfig any Kconfig make is called.
-A good place to customize the .config directly.
-CUSTOM_KERNEL_CONFIG
-
-
-	# hack for OdroidXU4. Copy firmare files
-	if [[ $BOARD == odroidxu4 ]]; then
-		mkdir -p "${kerneldir}/firmware/edid"
-		cp "${SRC}"/packages/blobs/odroidxu4/*.bin "${kerneldir}/firmware/edid"
-	fi
-
-	# hack for deb builder. To pack what's missing in headers pack.
-	cp "${SRC}"/patch/misc/headers-debian-byteshift.patch /tmp
-
-	if [[ $KERNEL_CONFIGURE != yes ]]; then
-		if [[ $BRANCH == default ]]; then
-			eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-				'make ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" silentoldconfig'
-		else
-			# TODO: check if required
-			eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-				'make ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" olddefconfig'
-		fi
-	else
-		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-			'make $CTHREADS ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" oldconfig'
-		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-			'make $CTHREADS ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" ${KERNEL_MENUCONFIG:-menuconfig}'
-
-		[[ ${PIPESTATUS[0]} -ne 0 ]] && exit_with_error "Error kernel menuconfig failed"
-
-		# store kernel config in easily reachable place
-		display_alert "Exporting new kernel config" "$DEST/config/$LINUXCONFIG.config" "info"
-		cp .config "${DEST}/config/${LINUXCONFIG}.config"
-		# export defconfig too if requested
-		if [[ $KERNEL_EXPORT_DEFCONFIG == yes ]]; then
-			eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-				'make ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" savedefconfig'
-			[[ -f defconfig ]] && cp defconfig "${DEST}/config/${LINUXCONFIG}.defconfig"
-		fi
-	fi
-
-	# create linux-source package - with already patched sources
-	# We will build this package first and clear the memory.
-	if [[ $BUILD_KSRC != no ]]; then
-		create_linux-source_package
-	fi
-
-	echo -e "\n\t== kernel ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
-	eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-		'make $CTHREADS ARCH=$ARCHITECTURE \
-		CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" \
-		$SRC_LOADADDR \
-		LOCALVERSION="-$LINUXFAMILY" \
-		$KERNEL_IMAGE_TYPE ${KERNEL_EXTRA_TARGETS:-modules dtbs} 2>>$DEST/${LOG_SUBPATH}/compilation.log' \
-		${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
-		${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" \
-		--progressbox "Compiling kernel..." $TTY_Y $TTY_X'} \
-		${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
-
-	if [[ ${PIPESTATUS[0]} -ne 0 || ! -f arch/$ARCHITECTURE/boot/$KERNEL_IMAGE_TYPE ]]; then
-		grep -i error $DEST/${LOG_SUBPATH}/compilation.log
-		exit_with_error "Kernel was not built" "@host"
-	fi
-
-	# different packaging for 4.3+
-	if linux-version compare "${version}" ge 4.3; then
-		local kernel_packing="bindeb-pkg"
-	else
-		local kernel_packing="deb-pkg"
-	fi
-
-	display_alert "Creating packages"
-
-	# produce deb packages: image, headers, firmware, dtb
-	echo -e "\n\t== deb packages: image, headers, firmware, dtb ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
-	eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
-		'make $CTHREADS $kernel_packing \
-		KDEB_PKGVERSION=$REVISION \
-		KDEB_COMPRESS=${DEB_COMPRESS} \
-		BRANCH=$BRANCH \
-		LOCALVERSION="-${LINUXFAMILY}" \
-		KBUILD_DEBARCH=$ARCH \
-		ARCH=$ARCHITECTURE \
-		DEBFULLNAME="$MAINTAINER" \
-		DEBEMAIL="$MAINTAINERMAIL" \
-		CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" 2>>$DEST/${LOG_SUBPATH}/compilation.log' \
-		${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
-		${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" --progressbox "Creating kernel packages..." $TTY_Y $TTY_X'} \
-		${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
-
-	cd .. || exit
-	# remove firmare image packages here - easier than patching ~40 packaging scripts at once
-	rm -f linux-firmware-image-*.deb
-
-	rsync --remove-source-files -rq ./*.deb "${DEB_STORAGE}/" || exit_with_error "Failed moving kernel DEBs"
-
-	# store git hash to the file and create a change log
-	HASHTARGET="${SRC}/cache/hash"$([[ ${BETA} == yes ]] && echo "-beta")"/linux-image-${BRANCH}-${LINUXFAMILY}"
-	OLDHASHTARGET=$(head -1 "${HASHTARGET}.githash" 2>/dev/null)
-
-	# check if OLDHASHTARGET commit exists otherwise use oldest
-	if  [[ -z ${KERNEL_VERSION_LEVEL} ]]; then
-		git -C ${kerneldir} cat-file -t ${OLDHASHTARGET} >/dev/null 2>&1
-		[[ $? -ne 0 ]] && OLDHASHTARGET=$(git -C ${kerneldir} show HEAD~199 --pretty=format:"%H" --no-patch)
-	else
-		git -C ${kerneldir} cat-file -t ${OLDHASHTARGET} >/dev/null 2>&1
-		[[ $? -ne 0 ]] && OLDHASHTARGET=$(git -C ${kerneldir} rev-list --max-parents=0 HEAD)
-	fi
-
-	[[ -z ${KERNELPATCHDIR} ]] && KERNELPATCHDIR=$LINUXFAMILY-$BRANCH
-	[[ -z ${LINUXCONFIG} ]] && LINUXCONFIG=linux-$LINUXFAMILY-$BRANCH
-
-	# calculate URL
-	if [[ "$KERNELSOURCE" == *"github.com"* ]]; then
-		URL="${KERNELSOURCE/git:/https:}/commit/${HASH}"
-	elif [[ "$KERNELSOURCE" == *"kernel.org"* ]]; then
-		URL="${KERNELSOURCE/git:/https:}/commit/?h=$(echo $KERNELBRANCH | cut -d":" -f2)&id=${HASH}"
-	else
-		URL="${KERNELSOURCE}/+/$HASH"
-	fi
-
-	# create change log
-	git --no-pager -C ${kerneldir} log --abbrev-commit --oneline --no-patch --no-merges --date-order --date=format:'%Y-%m-%d %H:%M:%S' --pretty=format:'%C(black bold)%ad%Creset%C(auto) | %s | <%an> | <a href='$URL'%H>%H</a>' ${OLDHASHTARGET}..${hash} > "${HASHTARGET}.gitlog"
-
-	# hash origin
-	echo "${hash}" > "${HASHTARGET}.githash"
-
-	# hash_patches
-	CALC_PATCHES=$(git -C $SRC log --format="%H" -1 -- $(realpath --relative-base="$SRC" "${SRC}/patch/kernel/${KERNELPATCHDIR}"))
-	[[ -z "$CALC_PATCHES" ]] && CALC_PATCHES="null"
-	echo "$CALC_PATCHES" >> "${HASHTARGET}.githash"
-
-	# hash_kernel_config
-	CALC_CONFIG=$(git -C $SRC log --format="%H" -1 -- $(realpath --relative-base="$SRC" "${SRC}/config/kernel/${LINUXCONFIG}.config"))
-	[[ -z "$CALC_CONFIG" ]] && CALC_CONFIG="null"
-	echo "$CALC_CONFIG" >> "${HASHTARGET}.githash"
-
-}
-
-
-
-
-compile_firmware()
-{
-	display_alert "Merging and packaging linux firmware" "@host" "info"
-
-	local firmwaretempdir plugin_dir
-
-	firmwaretempdir=$(mktemp -d)
-	chmod 700 ${firmwaretempdir}
-	trap "ret=\$?; rm -rf \"${firmwaretempdir}\" ; exit \$ret" 0 1 2 3 15
-	plugin_dir="armbian-firmware${FULL}"
-	mkdir -p "${firmwaretempdir}/${plugin_dir}/lib/firmware"
-
-	fetch_from_repo "$GITHUB_SOURCE/armbian/firmware" "armbian-firmware-git" "branch:master"
-	if [[ -n $FULL ]]; then
-		fetch_from_repo "$MAINLINE_FIRMWARE_SOURCE" "linux-firmware-git" "branch:main"
-		# cp : create hardlinks
-		cp -af --reflink=auto "${SRC}"/cache/sources/linux-firmware-git/* "${firmwaretempdir}/${plugin_dir}/lib/firmware/"
-		# cp : create hardlinks for ath11k WCN685x hw2.1 firmware since they are using the same firmware with hw2.0
-		cp -af --reflink=auto "${firmwaretempdir}/${plugin_dir}/lib/firmware/ath11k/WCN6855/hw2.0/" "${firmwaretempdir}/${plugin_dir}/lib/firmware/ath11k/WCN6855/hw2.1/"
-	fi
-	# overlay our firmware
-	# cp : create hardlinks
-	cp -af --reflink=auto "${SRC}"/cache/sources/armbian-firmware-git/* "${firmwaretempdir}/${plugin_dir}/lib/firmware/"
-
-	rm -rf "${firmwaretempdir}/${plugin_dir}"/lib/firmware/.git
-	cd "${firmwaretempdir}/${plugin_dir}" || exit
-
-	# set up control file
-	mkdir -p DEBIAN
-	cat <<-END > DEBIAN/control
-	Package: armbian-firmware${FULL}
-	Version: $REVISION
-	Architecture: all
-	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
-	Installed-Size: 1
-	Replaces: linux-firmware, firmware-brcm80211, firmware-ralink, firmware-samsung, firmware-realtek, armbian-firmware${REPLACE}
-	Section: kernel
-	Priority: optional
-	Description: Linux firmware${FULL}
-	END
-
-	cd "${firmwaretempdir}" || exit
-	# pack
-	mv "armbian-firmware${FULL}" "armbian-firmware${FULL}_${REVISION}_all"
-	display_alert "Building firmware package" "armbian-firmware${FULL}_${REVISION}_all" "info"
-	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "armbian-firmware${FULL}_${REVISION}_all" >> "${DEST}"/${LOG_SUBPATH}/install.log 2>&1
-	mv "armbian-firmware${FULL}_${REVISION}_all" "armbian-firmware${FULL}"
-	rsync -rq "armbian-firmware${FULL}_${REVISION}_all.deb" "${DEB_STORAGE}/"
-
-	# remove temp directory
-	rm -rf "${firmwaretempdir}"
-}
-
-
-
-
-compile_armbian-zsh()
-{
-
-	local tmp_dir armbian_zsh_dir
-	tmp_dir=$(mktemp -d)
-	chmod 700 ${tmp_dir}
-	trap "ret=\$?; rm -rf \"${tmp_dir}\" ; exit \$ret" 0 1 2 3 15
-	armbian_zsh_dir=armbian-zsh_${REVISION}_all
-	display_alert "Building deb" "armbian-zsh" "info"
-
-	fetch_from_repo "$GITHUB_SOURCE/ohmyzsh/ohmyzsh" "oh-my-zsh" "branch:master"
-	fetch_from_repo "$GITHUB_SOURCE/mroth/evalcache" "evalcache" "branch:master"
-
-	mkdir -p "${tmp_dir}/${armbian_zsh_dir}"/{DEBIAN,etc/skel/,etc/oh-my-zsh/,/etc/skel/.oh-my-zsh/cache}
-
-	# set up control file
-	cat <<-END > "${tmp_dir}/${armbian_zsh_dir}"/DEBIAN/control
-	Package: armbian-zsh
-	Version: $REVISION
-	Architecture: all
-	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
-	Depends: zsh, tmux
-	Section: utils
-	Priority: optional
-	Description: Armbian improved ZShell
-	END
-
-	# set up post install script
-	cat <<-END > "${tmp_dir}/${armbian_zsh_dir}"/DEBIAN/postinst
-	#!/bin/sh
-
-	# copy cache directory if not there yet
-	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$6"/.oh-my-zsh"}' /etc/passwd | xargs -i sh -c 'test ! -d {} && cp -R --attributes-only /etc/skel/.oh-my-zsh {}'
-	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$6"/.zshrc"}' /etc/passwd | xargs -i sh -c 'test ! -f {} && cp -R /etc/skel/.zshrc {}'
-
-	# fix owner permissions in home directory
-	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$1":"\$3" "\$6"/.oh-my-zsh"}' /etc/passwd | xargs -n2 chown -R
-	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$1":"\$3" "\$6"/.zshrc"}' /etc/passwd | xargs -n2 chown -R
-
-	# add support for bash profile
-	! grep emulate /etc/zsh/zprofile  >/dev/null && echo "emulate sh -c 'source /etc/profile'" >> /etc/zsh/zprofile
-	exit 0
-	END
-
-	cp -R "${SRC}"/cache/sources/oh-my-zsh "${tmp_dir}/${armbian_zsh_dir}"/etc/
-	cp -R "${SRC}"/cache/sources/evalcache "${tmp_dir}/${armbian_zsh_dir}"/etc/oh-my-zsh/plugins
-	cp "${tmp_dir}/${armbian_zsh_dir}"/etc/oh-my-zsh/templates/zshrc.zsh-template "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
-
-	chmod -R g-w,o-w "${tmp_dir}/${armbian_zsh_dir}"/etc/oh-my-zsh/
-
-	# we have common settings
-	sed -i "s/^export ZSH=.*/export ZSH=\/etc\/oh-my-zsh/" "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
-
-	# user cache
-	sed -i "/^export ZSH=.*/a export ZSH_CACHE_DIR=~\/.oh-my-zsh\/cache" "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
-
-	# define theme
-	sed -i 's/^ZSH_THEME=.*/ZSH_THEME="mrtazz"/' "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
-
-	# disable auto update since we provide update via package
-	sed -i "s/^# zstyle ':omz:update' mode disabled.*/zstyle ':omz:update' mode disabled/g" "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
-
-	# define default plugins
-	sed -i 's/^plugins=.*/plugins=(evalcache git git-extras debian tmux screen history extract colorize web-search docker)/' "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
-
-	chmod 755 "${tmp_dir}/${armbian_zsh_dir}"/DEBIAN/postinst
-
-	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "${tmp_dir}/${armbian_zsh_dir}" >> "${DEST}"/${LOG_SUBPATH}/output.log 2>&1
-	rsync --remove-source-files -rq "${tmp_dir}/${armbian_zsh_dir}.deb" "${DEB_STORAGE}/"
-	rm -rf "${tmp_dir}"
-
-}
-
-
-
-
-compile_armbian-config()
-{
-
-	local tmp_dir armbian_config_dir
-	tmp_dir=$(mktemp -d)
-	chmod 700 ${tmp_dir}
-	trap "ret=\$?; rm -rf \"${tmp_dir}\" ; exit \$ret" 0 1 2 3 15
-	armbian_config_dir=armbian-config_${REVISION}_all
-	display_alert "Building deb" "armbian-config" "info"
-
-	fetch_from_repo "$GITHUB_SOURCE/armbian/config" "armbian-config" "branch:master"
-	fetch_from_repo "$GITHUB_SOURCE/dylanaraps/neofetch" "neofetch" "tag:7.1.0"
-	fetch_from_repo "$GITHUB_SOURCE/complexorganizations/wireguard-manager" "wireguard-manager" "branch:main"
-
-	mkdir -p "${tmp_dir}/${armbian_config_dir}"/{DEBIAN,usr/bin/,usr/sbin/,usr/lib/armbian-config/}
-
-	# set up control file
-	cat <<-END > "${tmp_dir}/${armbian_config_dir}"/DEBIAN/control
-	Package: armbian-config
-	Version: $REVISION
-	Architecture: all
-	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
-	Replaces: armbian-bsp, neofetch
-	Depends: bash, iperf3, psmisc, curl, bc, expect, dialog, pv, zip, \
-	debconf-utils, unzip, build-essential, html2text, html2text, dirmngr, software-properties-common, debconf, jq
-	Recommends: armbian-bsp
-	Suggests: libpam-google-authenticator, qrencode, network-manager, sunxi-tools
-	Section: utils
-	Priority: optional
-	Description: Armbian configuration utility
-	END
-
-	install -m 755 "${SRC}"/cache/sources/neofetch/neofetch "${tmp_dir}/${armbian_config_dir}"/usr/bin/neofetch
-	cd "${tmp_dir}/${armbian_config_dir}"/usr/bin/
-	process_patch_file "${SRC}/patch/misc/add-armbian-neofetch.patch" "applying"
-
-	install -m 755 "${SRC}"/cache/sources/wireguard-manager/wireguard-manager.sh "${tmp_dir}/${armbian_config_dir}"/usr/bin/wireguard-manager
-	install -m 755 "${SRC}"/cache/sources/armbian-config/scripts/tv_grab_file "${tmp_dir}/${armbian_config_dir}"/usr/bin/tv_grab_file
-	install -m 755 "${SRC}"/cache/sources/armbian-config/debian-config "${tmp_dir}/${armbian_config_dir}"/usr/sbin/armbian-config
-	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-jobs "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/jobs.sh
-	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-submenu "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/submenu.sh
-	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-functions "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/functions.sh
-	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-functions-network "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/functions-network.sh
-	install -m 755 "${SRC}"/cache/sources/armbian-config/softy "${tmp_dir}/${armbian_config_dir}"/usr/sbin/softy
-	# fallback to replace armbian-config in BSP
-	ln -sf /usr/sbin/armbian-config "${tmp_dir}/${armbian_config_dir}"/usr/bin/armbian-config
-	ln -sf /usr/sbin/softy "${tmp_dir}/${armbian_config_dir}"/usr/bin/softy
-
-	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "${tmp_dir}/${armbian_config_dir}" >/dev/null
-	rsync --remove-source-files -rq "${tmp_dir}/${armbian_config_dir}.deb" "${DEB_STORAGE}/"
-	rm -rf "${tmp_dir}"
-}
-
-
-
-
-compile_plymouth-theme-armbian()
-{
-
-	local tmp_dir work_dir
-	tmp_dir=$(mktemp -d)
-	chmod 700 ${tmp_dir}
-	trap "ret=\$?; rm -rf \"${tmp_dir}\" ; exit \$ret" 0 1 2 3 15
-	plymouth_theme_armbian_dir=armbian-plymouth-theme_${REVISION}_all
-	display_alert "Building deb" "armbian-plymouth-theme" "info"
-
-	mkdir -p "${tmp_dir}/${plymouth_theme_armbian_dir}"/{DEBIAN,usr/share/plymouth/themes/armbian}
-
-	# set up control file
-	cat <<-END > "${tmp_dir}/${plymouth_theme_armbian_dir}"/DEBIAN/control
-	Package: armbian-plymouth-theme
-	Version: $REVISION
-	Architecture: all
-	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
-	Depends: plymouth, plymouth-themes
-	Section: universe/x11
-	Priority: optional
-	Description: boot animation, logger and I/O multiplexer - armbian theme
-	END
-
-	cp "${SRC}"/packages/plymouth-theme-armbian/debian/{postinst,prerm,postrm} \
-		"${tmp_dir}/${plymouth_theme_armbian_dir}"/DEBIAN/
-	chmod 755 "${tmp_dir}/${plymouth_theme_armbian_dir}"/DEBIAN/{postinst,prerm,postrm}
-
-	convert -resize 256x256 \
-		"${SRC}"/packages/plymouth-theme-armbian/armbian-logo.png \
-		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/bgrt-fallback.png
-
-	# convert -resize 52x52 \
-	# 	"${SRC}"/packages/plymouth-theme-armbian/spinner.gif \
-	# 	"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/animation-%04d.png
-
-	convert -resize 52x52 \
-		"${SRC}"/packages/plymouth-theme-armbian/spinner.gif \
-		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/throbber-%04d.png
-
-	cp "${SRC}"/packages/plymouth-theme-armbian/watermark.png \
-		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/
-
-	cp "${SRC}"/packages/plymouth-theme-armbian/{bullet,capslock,entry,keyboard,keymap-render,lock}.png \
-		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/
-
-	cp "${SRC}"/packages/plymouth-theme-armbian/armbian.plymouth \
-		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/
-
-	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "${tmp_dir}/${plymouth_theme_armbian_dir}" >/dev/null
-	rsync --remove-source-files -rq "${tmp_dir}/${plymouth_theme_armbian_dir}.deb" "${DEB_STORAGE}/"
-	rm -rf "${tmp_dir}"
-}
-
-
-
-
-compile_xilinx_bootgen()
-{
-	# Source code checkout
-	(fetch_from_repo "$GITHUB_SOURCE/Xilinx/bootgen.git" "xilinx-bootgen" "branch:master")
-
-	pushd "${SRC}"/cache/sources/xilinx-bootgen || exit
-
-	# Compile and install only if git commit hash changed
-	# need to check if /usr/local/bin/bootgen to detect new Docker containers with old cached sources
-	if [[ ! -f .commit_id || $(improved_git rev-parse @ 2>/dev/null) != $(<.commit_id) || ! -f /usr/local/bin/bootgen ]]; then
-		display_alert "Compiling" "xilinx-bootgen" "info"
-		make -s clean >/dev/null
-		make -s -j$(nproc) bootgen >/dev/null
-		mkdir -p /usr/local/bin/
-		install bootgen /usr/local/bin >/dev/null 2>&1
-		improved_git rev-parse @ 2>/dev/null > .commit_id
-	fi
-
-	popd
-}
-
-grab_version()
-{
-	local ver=()
-	ver[0]=$(grep "^VERSION" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^[[:digit:]]+')
-	ver[1]=$(grep "^PATCHLEVEL" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^[[:digit:]]+')
-	ver[2]=$(grep "^SUBLEVEL" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^[[:digit:]]+')
-	ver[3]=$(grep "^EXTRAVERSION" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^-rc[[:digit:]]+')
-	echo "${ver[0]:-0}${ver[1]:+.${ver[1]}}${ver[2]:+.${ver[2]}}${ver[3]}"
-}
-
-# find_toolchain <compiler_prefix> <expression>
-#
-# returns path to toolchain that satisfies <expression>
-#
-find_toolchain()
-{
-	[[ "${SKIP_EXTERNAL_TOOLCHAINS}" == "yes" ]] && { echo "/usr/bin"; return; }
-	local compiler=$1
-	local expression=$2
-	local dist=10
-	local toolchain=""
-	# extract target major.minor version from expression
-	local target_ver
-	target_ver=$(grep -oE "[[:digit:]]+\.[[:digit:]]" <<< "$expression")
-	for dir in "${SRC}"/cache/toolchain/*/; do
-		# check if is a toolchain for current $ARCH
-		[[ ! -f ${dir}bin/${compiler}gcc ]] && continue
-		# get toolchain major.minor version
-		local gcc_ver
-		gcc_ver=$("${dir}bin/${compiler}gcc" -dumpversion | grep -oE "^[[:digit:]]+\.[[:digit:]]")
-		# check if toolchain version satisfies requirement
-		awk "BEGIN{exit ! ($gcc_ver $expression)}" >/dev/null || continue
-		# check if found version is the closest to target
-		# may need different logic here with more than 1 digit minor version numbers
-		# numbers: 3.9 > 3.10; versions: 3.9 < 3.10
-		# dpkg --compare-versions can be used here if operators are changed
-		local d
-		d=$(awk '{x = $1 - $2}{printf "%.1f\n", (x > 0) ? x : -x}' <<< "$target_ver $gcc_ver")
-		if awk "BEGIN{exit ! ($d < $dist)}" >/dev/null ; then
-			dist=$d
-			toolchain=${dir}bin
-		fi
-	done
-	echo "$toolchain"
-	# logging a stack of used compilers.
-	if [[ -f "${DEST}"/${LOG_SUBPATH}/compiler.log ]]; then
-		if ! grep -q "$toolchain" "${DEST}"/${LOG_SUBPATH}/compiler.log; then
-			echo "$toolchain" >> "${DEST}"/${LOG_SUBPATH}/compiler.log;
-		fi
-	else
-			echo "$toolchain" >> "${DEST}"/${LOG_SUBPATH}/compiler.log;
-	fi
-}
-
-# advanced_patch <dest> <family> <board> <target> <branch> <description>
-#
-# parameters:
-# <dest>: u-boot, kernel, atf
-# <family>: u-boot: u-boot, u-boot-neo; kernel: sun4i-default, sunxi-next, ...
-# <board>: cubieboard, cubieboard2, cubietruck, ...
-# <target>: optional subdirectory
-# <description>: additional description text
-#
-# priority:
-# $USERPATCHES_PATH/<dest>/<family>/target_<target>
-# $USERPATCHES_PATH/<dest>/<family>/board_<board>
-# $USERPATCHES_PATH/<dest>/<family>/branch_<branch>
-# $USERPATCHES_PATH/<dest>/<family>
-# $SRC/patch/<dest>/<family>/target_<target>
-# $SRC/patch/<dest>/<family>/board_<board>
-# $SRC/patch/<dest>/<family>/branch_<branch>
-# $SRC/patch/<dest>/<family>
-#
-advanced_patch()
-{
-	local dest=$1
-	local family=$2
-	local board=$3
-	local target=$4
-	local branch=$5
-	local description=$6
-
-	display_alert "Started patching process for" "$dest $description" "info"
-	display_alert "Looking for user patches in" "userpatches/$dest/$family" "info"
-
-	local names=()
-	local dirs=(
-		"$USERPATCHES_PATH/$dest/$family/target_${target}:[\e[33mu\e[0m][\e[34mt\e[0m]"
-		"$USERPATCHES_PATH/$dest/$family/board_${board}:[\e[33mu\e[0m][\e[35mb\e[0m]"
-		"$USERPATCHES_PATH/$dest/$family/branch_${branch}:[\e[33mu\e[0m][\e[33mb\e[0m]"
-		"$USERPATCHES_PATH/$dest/$family:[\e[33mu\e[0m][\e[32mc\e[0m]"
-		"$SRC/patch/$dest/$family/target_${target}:[\e[32ml\e[0m][\e[34mt\e[0m]"
-		"$SRC/patch/$dest/$family/board_${board}:[\e[32ml\e[0m][\e[35mb\e[0m]"
-		"$SRC/patch/$dest/$family/branch_${branch}:[\e[32ml\e[0m][\e[33mb\e[0m]"
-		"$SRC/patch/$dest/$family:[\e[32ml\e[0m][\e[32mc\e[0m]"
-		)
-	local links=()
-
-	# required for "for" command
-	shopt -s nullglob dotglob
-	# get patch file names
-	for dir in "${dirs[@]}"; do
-		for patch in ${dir%%:*}/*.patch; do
-			names+=($(basename "${patch}"))
-		done
-		# add linked patch directories
-		if [[ -d ${dir%%:*} ]]; then
-			local findlinks
-			findlinks=$(find "${dir%%:*}" -maxdepth 1 -type l -print0 2>&1 | xargs -0)
-			[[ -n $findlinks ]] && readarray -d '' links < <(find "${findlinks}" -maxdepth 1 -type f -follow -print -iname "*.patch" -print | grep "\.patch$" | sed "s|${dir%%:*}/||g" 2>&1)
-		fi
-	done
-	# merge static and linked
-	names=("${names[@]}" "${links[@]}")
-	# remove duplicates
-	local names_s=($(echo "${names[@]}" | tr ' ' '\n' | LC_ALL=C sort -u | tr '\n' ' '))
-	# apply patches
-	for name in "${names_s[@]}"; do
-		for dir in "${dirs[@]}"; do
-			if [[ -f ${dir%%:*}/$name ]]; then
-				if [[ -s ${dir%%:*}/$name ]]; then
-					process_patch_file "${dir%%:*}/$name" "${dir##*:}"
-				else
-					display_alert "* ${dir##*:} $name" "skipped"
-				fi
-				break # next name
-			fi
-		done
-	done
-}
-
-# process_patch_file <file> <description>
-#
-# parameters:
-# <file>: path to patch file
-# <status>: additional status text
-#
-process_patch_file()
-{
-	local patch=$1
-	local status=$2
-
-	# detect and remove files which patch will create
-	lsdiff -s --strip=1 "${patch}" | grep '^+' | awk '{print $2}' | xargs -I % sh -c 'rm -f %'
-
-	echo "Processing file $patch" >> "${DEST}"/${LOG_SUBPATH}/patching.log
-	patch --batch --silent -p1 -N < "${patch}" >> "${DEST}"/${LOG_SUBPATH}/patching.log 2>&1
-
-	if [[ $? -ne 0 ]]; then
-		display_alert "* $status $(basename "${patch}")" "failed" "wrn"
-		[[ $EXIT_PATCHING_ERROR == yes ]] && exit_with_error "Aborting due to" "EXIT_PATCHING_ERROR"
-	else
-		display_alert "* $status $(basename "${patch}")" "" "info"
-	fi
-	echo >> "${DEST}"/${LOG_SUBPATH}/patching.log
-}
-
-
-# apply_patch_series <target dir> <full path to series file>
-apply_patch_series ()
-{
-	local t_dir="${1}"
-	local series="${2}"
-	local bzdir="$(dirname $series)"
-	local flag
-	local err_pt=$(mktemp /tmp/apply_patch_series_XXXXX)
-
-	list=$(awk '$0 !~ /^#.*|^-.*|^$/' "${series}")
-	skiplist=$(awk '$0 ~ /^-.*/{print $NF}' "${series}")
-
-	display_alert "apply a series of " "[$(echo $list | wc -w)] patches"
-	display_alert "skip [$(echo $skiplist | wc -w)] patches"
-
-	cd "${t_dir}" || exit 1
-	for p in $list
-	do
-		# Detect and remove files as '*.patch' which patch will create.
-		# So we need to delete the file before applying the patch if it exists.
-		lsdiff -s --strip=1 "$bzdir/$p" | \
-		awk '$0 ~ /^+.*patch$/{print $2}' | \
-		xargs -I % sh -c 'rm -f %'
-
-		patch --batch --silent --no-backup-if-mismatch -p1 -N < $bzdir/"$p" >>$err_pt 2>&1
-		flag=$?
-
-
-		case $flag in
-			0)	printf "[\033[32m done \033[0m]    %s\n" "${p}"
-				printf "[ done ]    %s\n" "${p}" >> "${DEST}"/debug/patching.log
-				;;
-			1)
-				printf "[\033[33m FAILED \033[0m]  %s\n" "${p}"
-				echo -e "[ FAILED ]  For ${p} \t\tprocess exit [ $flag ]" >>"${DEST}"/debug/patching.log
-				cat $err_pt >>"${DEST}"/debug/patching.log
-				;;
-			2)
-				printf "[\033[31m Patch wrong \033[0m] %s\n" "${p}"
-				echo -e "Patch wrong ${p}\t\tprocess exit [ $flag ]" >>"${DEST}"/debug/patching.log
-				cat $err_pt >>"${DEST}"/debug/patching.log
-				;;
-		esac
-		echo "" >$err_pt
-	done
-	echo "" >>"${DEST}"/debug/patching.log
-	rm $err_pt
-}
-
-userpatch_create()
-{
-	# create commit to start from clean source
-	git add .
-	git -c user.name='Armbian User' -c user.email='user@example.org' commit -q -m "Cleaning working copy"
-
-	local patch="$DEST/patch/$1-$LINUXFAMILY-$BRANCH.patch"
-
-	# apply previous user debug mode created patches
-	if [[ -f $patch ]]; then
-		display_alert "Applying existing $1 patch" "$patch" "wrn" && patch --batch --silent -p1 -N < "${patch}"
-		# read title of a patch in case Git is configured
-		if [[ -n $(git config user.email) ]]; then
-			COMMIT_MESSAGE=$(cat "${patch}" | grep Subject | sed -n -e '0,/PATCH/s/.*PATCH]//p' | xargs)
-			display_alert "Patch name extracted" "$COMMIT_MESSAGE" "wrn"
-		fi
-	fi
-
-	# prompt to alter source
-	display_alert "Make your changes in this directory:" "$(pwd)" "wrn"
-	display_alert "Press <Enter> after you are done" "waiting" "wrn"
-	read -r </dev/tty
-	tput cuu1
-	git add .
-	# create patch out of changes
-	if ! git diff-index --quiet --cached HEAD; then
-		# If Git is configured, create proper patch and ask for a name
-		if [[ -n $(git config user.email) ]]; then
-			display_alert "Add / change patch name" "$COMMIT_MESSAGE" "wrn"
-			read -e -p "Patch description: " -i "$COMMIT_MESSAGE" COMMIT_MESSAGE
-			[[ -z "$COMMIT_MESSAGE" ]] && COMMIT_MESSAGE="Patching something"
-			git commit -s -m "$COMMIT_MESSAGE"
-			git format-patch -1 HEAD --stdout --signature="Created with Armbian build tools $GITHUB_SOURCE/armbian/build" > "${patch}"
-			PATCHFILE=$(git format-patch -1 HEAD)
-			rm $PATCHFILE # delete the actual file
-			# create a symlink to have a nice name ready
-			find $DEST/patch/ -type l -delete # delete any existing
-			ln -sf $patch $DEST/patch/$PATCHFILE
-		else
-			git diff --staged > "${patch}"
-		fi
-		display_alert "You will find your patch here:" "$patch" "info"
-	else
-		display_alert "No changes found, skipping patch creation" "" "wrn"
-	fi
-	git reset --soft HEAD~
-	for i in {3..1..1}; do echo -n "$i." && sleep 1; done
-}
-
-# overlayfs_wrapper <operation> <workdir> <description>
-#
-# <operation>: wrap|cleanup
-# <workdir>: path to source directory
-# <description>: suffix for merged directory to help locating it in /tmp
-# return value: new directory
-#
-# Assumptions/notes:
-# - Ubuntu Xenial host
-# - /tmp is mounted as tmpfs
-# - there is enough space on /tmp
-# - UB if running multiple compilation tasks in parallel
-# - should not be used with CREATE_PATCHES=yes
-#
-overlayfs_wrapper()
-{
-	local operation="$1"
-	if [[ $operation == wrap ]]; then
-		local srcdir="$2"
-		local description="$3"
-		mkdir -p /tmp/overlay_components/ /tmp/armbian_build/
-		local tempdir workdir mergeddir
-		tempdir=$(mktemp -d --tmpdir="/tmp/overlay_components/")
-		workdir=$(mktemp -d --tmpdir="/tmp/overlay_components/")
-		mergeddir=$(mktemp -d --suffix="_$description" --tmpdir="/tmp/armbian_build/")
-		mount -t overlay overlay -o lowerdir="$srcdir",upperdir="$tempdir",workdir="$workdir" "$mergeddir"
-		# this is executed in a subshell, so use temp files to pass extra data outside
-		echo "$tempdir" >> /tmp/.overlayfs_wrapper_cleanup
-		echo "$mergeddir" >> /tmp/.overlayfs_wrapper_umount
-		echo "$mergeddir" >> /tmp/.overlayfs_wrapper_cleanup
-		echo "$mergeddir"
-		return
-	fi
-	if [[ $operation == cleanup ]]; then
-		if [[ -f /tmp/.overlayfs_wrapper_umount ]]; then
-			for dir in $(</tmp/.overlayfs_wrapper_umount); do
-				[[ $dir == /tmp/* ]] && umount -l "$dir" > /dev/null 2>&1
-			done
-		fi
-		if [[ -f /tmp/.overlayfs_wrapper_cleanup ]]; then
-			for dir in $(</tmp/.overlayfs_wrapper_cleanup); do
-				[[ $dir == /tmp/* ]] && rm -rf "$dir"
-			done
-		fi
-		rm -f /tmp/.overlayfs_wrapper_umount /tmp/.overlayfs_wrapper_cleanup
-	fi
-}
diff --git a/lib/functions/compilation/atf.sh b/lib/functions/compilation/atf.sh
new file mode 100644
index 0000000000..e3357abfee
--- /dev/null
+++ b/lib/functions/compilation/atf.sh
@@ -0,0 +1,83 @@
+compile_atf()
+{
+	if [[ $CLEAN_LEVEL == *make* ]]; then
+		display_alert "Cleaning" "$ATFSOURCEDIR" "info"
+		(cd "${SRC}/cache/sources/${ATFSOURCEDIR}"; make distclean > /dev/null 2>&1)
+	fi
+
+	if [[ $USE_OVERLAYFS == yes ]]; then
+		local atfdir
+		atfdir=$(overlayfs_wrapper "wrap" "$SRC/cache/sources/$ATFSOURCEDIR" "atf_${LINUXFAMILY}_${BRANCH}")
+	else
+		local atfdir="$SRC/cache/sources/$ATFSOURCEDIR"
+	fi
+	cd "$atfdir" || exit
+
+	display_alert "Compiling ATF" "" "info"
+
+# build aarch64
+  if [[ $(dpkg --print-architecture) == amd64 ]]; then
+
+	local toolchain
+	toolchain=$(find_toolchain "$ATF_COMPILER" "$ATF_USE_GCC")
+	[[ -z $toolchain ]] && exit_with_error "Could not find required toolchain" "${ATF_COMPILER}gcc $ATF_USE_GCC"
+
+	if [[ -n $ATF_TOOLCHAIN2 ]]; then
+		local toolchain2_type toolchain2_ver toolchain2
+		toolchain2_type=$(cut -d':' -f1 <<< "${ATF_TOOLCHAIN2}")
+		toolchain2_ver=$(cut -d':' -f2 <<< "${ATF_TOOLCHAIN2}")
+		toolchain2=$(find_toolchain "$toolchain2_type" "$toolchain2_ver")
+		[[ -z $toolchain2 ]] && exit_with_error "Could not find required toolchain" "${toolchain2_type}gcc $toolchain2_ver"
+	fi
+
+# build aarch64
+  fi
+
+	display_alert "Compiler version" "${ATF_COMPILER}gcc $(eval env PATH="${toolchain}:${PATH}" "${ATF_COMPILER}gcc" -dumpversion)" "info"
+
+	local target_make target_patchdir target_files
+	target_make=$(cut -d';' -f1 <<< "${ATF_TARGET_MAP}")
+	target_patchdir=$(cut -d';' -f2 <<< "${ATF_TARGET_MAP}")
+	target_files=$(cut -d';' -f3 <<< "${ATF_TARGET_MAP}")
+
+	advanced_patch "atf" "${ATFPATCHDIR}" "$BOARD" "$target_patchdir" "$BRANCH" "${LINUXFAMILY}-${BOARD}-${BRANCH}"
+
+	# create patch for manual source changes
+	[[ $CREATE_PATCHES == yes ]] && userpatch_create "atf"
+
+	echo -e "\n\t==  atf  ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
+	# ENABLE_BACKTRACE="0" has been added to workaround a regression in ATF.
+	# Check: https://github.com/armbian/build/issues/1157
+	eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${toolchain2}:${PATH}" \
+		'make ENABLE_BACKTRACE="0" $target_make $CTHREADS \
+		CROSS_COMPILE="$CCACHE $ATF_COMPILER"' 2>> "${DEST}"/${LOG_SUBPATH}/compilation.log \
+		${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
+		${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" --progressbox "Compiling ATF..." $TTY_Y $TTY_X'} \
+		${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
+
+	[[ ${PIPESTATUS[0]} -ne 0 ]] && exit_with_error "ATF compilation failed"
+
+	[[ $(type -t atf_custom_postprocess) == function ]] && atf_custom_postprocess
+
+	atftempdir=$(mktemp -d)
+	chmod 700 ${atftempdir}
+	trap "ret=\$?; rm -rf \"${atftempdir}\" ; exit \$ret" 0 1 2 3 15
+
+	# copy files to temp directory
+	for f in $target_files; do
+		local f_src
+		f_src=$(cut -d':' -f1 <<< "${f}")
+		if [[ $f == *:* ]]; then
+			local f_dst
+			f_dst=$(cut -d':' -f2 <<< "${f}")
+		else
+			local f_dst
+			f_dst=$(basename "${f_src}")
+		fi
+		[[ ! -f $f_src ]] && exit_with_error "ATF file not found" "$(basename "${f_src}")"
+		cp "${f_src}" "${atftempdir}/${f_dst}"
+	done
+
+	# copy license file to pack it to u-boot package later
+	[[ -f license.md ]] && cp license.md "${atftempdir}"/
+}
diff --git a/lib/functions/compilation/debs.sh b/lib/functions/compilation/debs.sh
new file mode 100644
index 0000000000..ba51358d46
--- /dev/null
+++ b/lib/functions/compilation/debs.sh
@@ -0,0 +1,253 @@
+compile_firmware()
+{
+	display_alert "Merging and packaging linux firmware" "@host" "info"
+
+	local firmwaretempdir plugin_dir
+
+	firmwaretempdir=$(mktemp -d)
+	chmod 700 ${firmwaretempdir}
+	trap "ret=\$?; rm -rf \"${firmwaretempdir}\" ; exit \$ret" 0 1 2 3 15
+	plugin_dir="armbian-firmware${FULL}"
+	mkdir -p "${firmwaretempdir}/${plugin_dir}/lib/firmware"
+
+	fetch_from_repo "$GITHUB_SOURCE/armbian/firmware" "armbian-firmware-git" "branch:master"
+	if [[ -n $FULL ]]; then
+		fetch_from_repo "$MAINLINE_FIRMWARE_SOURCE" "linux-firmware-git" "branch:main"
+		# cp : create hardlinks
+		cp -af --reflink=auto "${SRC}"/cache/sources/linux-firmware-git/* "${firmwaretempdir}/${plugin_dir}/lib/firmware/"
+		# cp : create hardlinks for ath11k WCN685x hw2.1 firmware since they are using the same firmware with hw2.0
+		cp -af --reflink=auto "${firmwaretempdir}/${plugin_dir}/lib/firmware/ath11k/WCN6855/hw2.0/" "${firmwaretempdir}/${plugin_dir}/lib/firmware/ath11k/WCN6855/hw2.1/"
+	fi
+	# overlay our firmware
+	# cp : create hardlinks
+	cp -af --reflink=auto "${SRC}"/cache/sources/armbian-firmware-git/* "${firmwaretempdir}/${plugin_dir}/lib/firmware/"
+
+	rm -rf "${firmwaretempdir}/${plugin_dir}"/lib/firmware/.git
+	cd "${firmwaretempdir}/${plugin_dir}" || exit
+
+	# set up control file
+	mkdir -p DEBIAN
+	cat <<-END > DEBIAN/control
+	Package: armbian-firmware${FULL}
+	Version: $REVISION
+	Architecture: all
+	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
+	Installed-Size: 1
+	Replaces: linux-firmware, firmware-brcm80211, firmware-ralink, firmware-samsung, firmware-realtek, armbian-firmware${REPLACE}
+	Section: kernel
+	Priority: optional
+	Description: Linux firmware${FULL}
+	END
+
+	cd "${firmwaretempdir}" || exit
+	# pack
+	mv "armbian-firmware${FULL}" "armbian-firmware${FULL}_${REVISION}_all"
+	display_alert "Building firmware package" "armbian-firmware${FULL}_${REVISION}_all" "info"
+	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "armbian-firmware${FULL}_${REVISION}_all" >> "${DEST}"/${LOG_SUBPATH}/install.log 2>&1
+	mv "armbian-firmware${FULL}_${REVISION}_all" "armbian-firmware${FULL}"
+	rsync -rq "armbian-firmware${FULL}_${REVISION}_all.deb" "${DEB_STORAGE}/"
+
+	# remove temp directory
+	rm -rf "${firmwaretempdir}"
+}
+
+compile_armbian-zsh()
+{
+
+	local tmp_dir armbian_zsh_dir
+	tmp_dir=$(mktemp -d)
+	chmod 700 ${tmp_dir}
+	trap "ret=\$?; rm -rf \"${tmp_dir}\" ; exit \$ret" 0 1 2 3 15
+	armbian_zsh_dir=armbian-zsh_${REVISION}_all
+	display_alert "Building deb" "armbian-zsh" "info"
+
+	fetch_from_repo "$GITHUB_SOURCE/ohmyzsh/ohmyzsh" "oh-my-zsh" "branch:master"
+	fetch_from_repo "$GITHUB_SOURCE/mroth/evalcache" "evalcache" "branch:master"
+
+	mkdir -p "${tmp_dir}/${armbian_zsh_dir}"/{DEBIAN,etc/skel/,etc/oh-my-zsh/,/etc/skel/.oh-my-zsh/cache}
+
+	# set up control file
+	cat <<-END > "${tmp_dir}/${armbian_zsh_dir}"/DEBIAN/control
+	Package: armbian-zsh
+	Version: $REVISION
+	Architecture: all
+	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
+	Depends: zsh, tmux
+	Section: utils
+	Priority: optional
+	Description: Armbian improved ZShell
+	END
+
+	# set up post install script
+	cat <<-END > "${tmp_dir}/${armbian_zsh_dir}"/DEBIAN/postinst
+	#!/bin/sh
+
+	# copy cache directory if not there yet
+	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$6"/.oh-my-zsh"}' /etc/passwd | xargs -i sh -c 'test ! -d {} && cp -R --attributes-only /etc/skel/.oh-my-zsh {}'
+	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$6"/.zshrc"}' /etc/passwd | xargs -i sh -c 'test ! -f {} && cp -R /etc/skel/.zshrc {}'
+
+	# fix owner permissions in home directory
+	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$1":"\$3" "\$6"/.oh-my-zsh"}' /etc/passwd | xargs -n2 chown -R
+	awk -F'[:]' '{if (\$3 >= 1000 && \$3 != 65534 || \$3 == 0) print ""\$1":"\$3" "\$6"/.zshrc"}' /etc/passwd | xargs -n2 chown -R
+
+	# add support for bash profile
+	! grep emulate /etc/zsh/zprofile  >/dev/null && echo "emulate sh -c 'source /etc/profile'" >> /etc/zsh/zprofile
+	exit 0
+	END
+
+	cp -R "${SRC}"/cache/sources/oh-my-zsh "${tmp_dir}/${armbian_zsh_dir}"/etc/
+	cp -R "${SRC}"/cache/sources/evalcache "${tmp_dir}/${armbian_zsh_dir}"/etc/oh-my-zsh/plugins
+	cp "${tmp_dir}/${armbian_zsh_dir}"/etc/oh-my-zsh/templates/zshrc.zsh-template "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
+
+	chmod -R g-w,o-w "${tmp_dir}/${armbian_zsh_dir}"/etc/oh-my-zsh/
+
+	# we have common settings
+	sed -i "s/^export ZSH=.*/export ZSH=\/etc\/oh-my-zsh/" "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
+
+	# user cache
+	sed -i "/^export ZSH=.*/a export ZSH_CACHE_DIR=~\/.oh-my-zsh\/cache" "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
+
+	# define theme
+	sed -i 's/^ZSH_THEME=.*/ZSH_THEME="mrtazz"/' "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
+
+	# disable auto update since we provide update via package
+	sed -i "s/^# zstyle ':omz:update' mode disabled.*/zstyle ':omz:update' mode disabled/g" "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
+
+	# define default plugins
+	sed -i 's/^plugins=.*/plugins=(evalcache git git-extras debian tmux screen history extract colorize web-search docker)/' "${tmp_dir}/${armbian_zsh_dir}"/etc/skel/.zshrc
+
+	chmod 755 "${tmp_dir}/${armbian_zsh_dir}"/DEBIAN/postinst
+
+	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "${tmp_dir}/${armbian_zsh_dir}" >> "${DEST}"/${LOG_SUBPATH}/output.log 2>&1
+	rsync --remove-source-files -rq "${tmp_dir}/${armbian_zsh_dir}.deb" "${DEB_STORAGE}/"
+	rm -rf "${tmp_dir}"
+
+}
+
+compile_armbian-config()
+{
+
+	local tmp_dir armbian_config_dir
+	tmp_dir=$(mktemp -d)
+	chmod 700 ${tmp_dir}
+	trap "ret=\$?; rm -rf \"${tmp_dir}\" ; exit \$ret" 0 1 2 3 15
+	armbian_config_dir=armbian-config_${REVISION}_all
+	display_alert "Building deb" "armbian-config" "info"
+
+	fetch_from_repo "$GITHUB_SOURCE/armbian/config" "armbian-config" "branch:master"
+	fetch_from_repo "$GITHUB_SOURCE/dylanaraps/neofetch" "neofetch" "tag:7.1.0"
+	fetch_from_repo "$GITHUB_SOURCE/complexorganizations/wireguard-manager" "wireguard-manager" "branch:main"
+
+	mkdir -p "${tmp_dir}/${armbian_config_dir}"/{DEBIAN,usr/bin/,usr/sbin/,usr/lib/armbian-config/}
+
+	# set up control file
+	cat <<-END > "${tmp_dir}/${armbian_config_dir}"/DEBIAN/control
+	Package: armbian-config
+	Version: $REVISION
+	Architecture: all
+	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
+	Replaces: armbian-bsp, neofetch
+	Depends: bash, iperf3, psmisc, curl, bc, expect, dialog, pv, zip, \
+	debconf-utils, unzip, build-essential, html2text, html2text, dirmngr, software-properties-common, debconf, jq
+	Recommends: armbian-bsp
+	Suggests: libpam-google-authenticator, qrencode, network-manager, sunxi-tools
+	Section: utils
+	Priority: optional
+	Description: Armbian configuration utility
+	END
+
+	install -m 755 "${SRC}"/cache/sources/neofetch/neofetch "${tmp_dir}/${armbian_config_dir}"/usr/bin/neofetch
+	cd "${tmp_dir}/${armbian_config_dir}"/usr/bin/
+	process_patch_file "${SRC}/patch/misc/add-armbian-neofetch.patch" "applying"
+
+	install -m 755 "${SRC}"/cache/sources/wireguard-manager/wireguard-manager.sh "${tmp_dir}/${armbian_config_dir}"/usr/bin/wireguard-manager
+	install -m 755 "${SRC}"/cache/sources/armbian-config/scripts/tv_grab_file "${tmp_dir}/${armbian_config_dir}"/usr/bin/tv_grab_file
+	install -m 755 "${SRC}"/cache/sources/armbian-config/debian-config "${tmp_dir}/${armbian_config_dir}"/usr/sbin/armbian-config
+	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-jobs "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/jobs.sh
+	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-submenu "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/submenu.sh
+	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-functions "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/functions.sh
+	install -m 644 "${SRC}"/cache/sources/armbian-config/debian-config-functions-network "${tmp_dir}/${armbian_config_dir}"/usr/lib/armbian-config/functions-network.sh
+	install -m 755 "${SRC}"/cache/sources/armbian-config/softy "${tmp_dir}/${armbian_config_dir}"/usr/sbin/softy
+	# fallback to replace armbian-config in BSP
+	ln -sf /usr/sbin/armbian-config "${tmp_dir}/${armbian_config_dir}"/usr/bin/armbian-config
+	ln -sf /usr/sbin/softy "${tmp_dir}/${armbian_config_dir}"/usr/bin/softy
+
+	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "${tmp_dir}/${armbian_config_dir}" >/dev/null
+	rsync --remove-source-files -rq "${tmp_dir}/${armbian_config_dir}.deb" "${DEB_STORAGE}/"
+	rm -rf "${tmp_dir}"
+}
+
+compile_xilinx_bootgen()
+{
+	# Source code checkout
+	(fetch_from_repo "$GITHUB_SOURCE/Xilinx/bootgen.git" "xilinx-bootgen" "branch:master")
+
+	pushd "${SRC}"/cache/sources/xilinx-bootgen || exit
+
+	# Compile and install only if git commit hash changed
+	# need to check if /usr/local/bin/bootgen to detect new Docker containers with old cached sources
+	if [[ ! -f .commit_id || $(improved_git rev-parse @ 2>/dev/null) != $(<.commit_id) || ! -f /usr/local/bin/bootgen ]]; then
+		display_alert "Compiling" "xilinx-bootgen" "info"
+		make -s clean >/dev/null
+		make -s -j$(nproc) bootgen >/dev/null
+		mkdir -p /usr/local/bin/
+		install bootgen /usr/local/bin >/dev/null 2>&1
+		improved_git rev-parse @ 2>/dev/null > .commit_id
+	fi
+
+	popd
+}
+
+compile_plymouth-theme-armbian()
+{
+
+	local tmp_dir work_dir
+	tmp_dir=$(mktemp -d)
+	chmod 700 ${tmp_dir}
+	trap "ret=\$?; rm -rf \"${tmp_dir}\" ; exit \$ret" 0 1 2 3 15
+	plymouth_theme_armbian_dir=armbian-plymouth-theme_${REVISION}_all
+	display_alert "Building deb" "armbian-plymouth-theme" "info"
+
+	mkdir -p "${tmp_dir}/${plymouth_theme_armbian_dir}"/{DEBIAN,usr/share/plymouth/themes/armbian}
+
+	# set up control file
+	cat <<-END > "${tmp_dir}/${plymouth_theme_armbian_dir}"/DEBIAN/control
+	Package: armbian-plymouth-theme
+	Version: $REVISION
+	Architecture: all
+	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
+	Depends: plymouth, plymouth-themes
+	Section: universe/x11
+	Priority: optional
+	Description: boot animation, logger and I/O multiplexer - armbian theme
+	END
+
+	cp "${SRC}"/packages/plymouth-theme-armbian/debian/{postinst,prerm,postrm} \
+		"${tmp_dir}/${plymouth_theme_armbian_dir}"/DEBIAN/
+	chmod 755 "${tmp_dir}/${plymouth_theme_armbian_dir}"/DEBIAN/{postinst,prerm,postrm}
+
+	convert -resize 256x256 \
+		"${SRC}"/packages/plymouth-theme-armbian/armbian-logo.png \
+		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/bgrt-fallback.png
+
+	# convert -resize 52x52 \
+	# 	"${SRC}"/packages/plymouth-theme-armbian/spinner.gif \
+	# 	"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/animation-%04d.png
+
+	convert -resize 52x52 \
+		"${SRC}"/packages/plymouth-theme-armbian/spinner.gif \
+		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/throbber-%04d.png
+
+	cp "${SRC}"/packages/plymouth-theme-armbian/watermark.png \
+		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/
+
+	cp "${SRC}"/packages/plymouth-theme-armbian/{bullet,capslock,entry,keyboard,keymap-render,lock}.png \
+		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/
+
+	cp "${SRC}"/packages/plymouth-theme-armbian/armbian.plymouth \
+		"${tmp_dir}/${plymouth_theme_armbian_dir}"/usr/share/plymouth/themes/armbian/
+
+	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "${tmp_dir}/${plymouth_theme_armbian_dir}" >/dev/null
+	rsync --remove-source-files -rq "${tmp_dir}/${plymouth_theme_armbian_dir}.deb" "${DEB_STORAGE}/"
+	rm -rf "${tmp_dir}"
+}
diff --git a/lib/functions/compilation/kernel-debs.sh b/lib/functions/compilation/kernel-debs.sh
new file mode 100644
index 0000000000..74179f171c
--- /dev/null
+++ b/lib/functions/compilation/kernel-debs.sh
@@ -0,0 +1,40 @@
+create_linux-source_package ()
+{
+	ts=$(date +%s)
+	local sources_pkg_dir tmp_src_dir
+	tmp_src_dir=$(mktemp -d)
+	trap "ret=\$?; rm -rf \"${tmp_src_dir}\" ; exit \$ret" 0 1 2 3 15
+	sources_pkg_dir=${tmp_src_dir}/${CHOSEN_KSRC}_${REVISION}_all
+	mkdir -p "${sources_pkg_dir}"/usr/src/ \
+		"${sources_pkg_dir}"/usr/share/doc/linux-source-${version}-${LINUXFAMILY} \
+		"${sources_pkg_dir}"/DEBIAN
+
+	cp "${SRC}/config/kernel/${LINUXCONFIG}.config" "default_${LINUXCONFIG}.config"
+	xz < .config > "${sources_pkg_dir}/usr/src/${LINUXCONFIG}_${version}_${REVISION}_config.xz"
+
+	display_alert "Compressing sources for the linux-source package"
+	tar cp --directory="$kerneldir" --exclude='.git' --owner=root . \
+		| pv -p -b -r -s "$(du -sb "$kerneldir" --exclude=='.git' | cut -f1)" \
+		| pixz -4 > "${sources_pkg_dir}/usr/src/linux-source-${version}-${LINUXFAMILY}.tar.xz"
+	cp COPYING "${sources_pkg_dir}/usr/share/doc/linux-source-${version}-${LINUXFAMILY}/LICENSE"
+
+	cat <<-EOF > "${sources_pkg_dir}"/DEBIAN/control
+	Package: linux-source-${version}-${BRANCH}-${LINUXFAMILY}
+	Version: ${version}-${BRANCH}-${LINUXFAMILY}+${REVISION}
+	Architecture: all
+	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
+	Section: kernel
+	Priority: optional
+	Depends: binutils, coreutils
+	Provides: linux-source, linux-source-${version}-${LINUXFAMILY}
+	Recommends: gcc, make
+	Description: This package provides the source code for the Linux kernel $version
+	EOF
+
+	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} -z0 "${sources_pkg_dir}" "${sources_pkg_dir}.deb"
+	rsync --remove-source-files -rq "${sources_pkg_dir}.deb" "${DEB_STORAGE}/"
+
+	te=$(date +%s)
+	display_alert "Make the linux-source package" "$(($te - $ts)) sec." "info"
+	rm -rf "${tmp_src_dir}"
+}
diff --git a/lib/functions/compilation/kernel.sh b/lib/functions/compilation/kernel.sh
new file mode 100644
index 0000000000..111cc41cf0
--- /dev/null
+++ b/lib/functions/compilation/kernel.sh
@@ -0,0 +1,217 @@
+compile_kernel()
+{
+	if [[ $CLEAN_LEVEL == *make* ]]; then
+		display_alert "Cleaning" "$LINUXSOURCEDIR" "info"
+		(cd "${SRC}/cache/sources/${LINUXSOURCEDIR}"; make ARCH="${ARCHITECTURE}" clean >/dev/null 2>&1)
+	fi
+
+	if [[ $USE_OVERLAYFS == yes ]]; then
+		local kerneldir
+		kerneldir=$(overlayfs_wrapper "wrap" "$SRC/cache/sources/$LINUXSOURCEDIR" "kernel_${LINUXFAMILY}_${BRANCH}")
+	else
+		local kerneldir="$SRC/cache/sources/$LINUXSOURCEDIR"
+	fi
+	cd "${kerneldir}" || exit
+
+	rm -f localversion
+
+	# read kernel version
+	local version hash
+	version=$(grab_version "$kerneldir")
+
+	# read kernel git hash
+	hash=$(improved_git --git-dir="$kerneldir"/.git rev-parse HEAD)
+
+	# Apply a series of patches if a series file exists
+	if test -f "${SRC}"/patch/kernel/${KERNELPATCHDIR}/series.conf; then
+		display_alert "series.conf file visible. Apply"
+		series_conf="${SRC}"/patch/kernel/${KERNELPATCHDIR}/series.conf
+
+		# apply_patch_series <target dir> <full path to series file>
+		apply_patch_series "${kerneldir}" "$series_conf"
+	fi
+
+	# build 3rd party drivers
+	compilation_prepare
+
+	advanced_patch "kernel" "$KERNELPATCHDIR" "$BOARD" "" "$BRANCH" "$LINUXFAMILY-$BRANCH"
+
+	# create patch for manual source changes in debug mode
+	[[ $CREATE_PATCHES == yes ]] && userpatch_create "kernel"
+
+	# re-read kernel version after patching
+	local version
+	version=$(grab_version "$kerneldir")
+
+	display_alert "Compiling $BRANCH kernel" "$version" "info"
+
+	# compare with the architecture of the current Debian node
+	# if it matches we use the system compiler
+	if $(dpkg-architecture -e "${ARCH}"); then
+		display_alert "Native compilation"
+	elif [[ $(dpkg --print-architecture) == amd64 ]]; then
+		local toolchain
+		toolchain=$(find_toolchain "$KERNEL_COMPILER" "$KERNEL_USE_GCC")
+		[[ -z $toolchain ]] && exit_with_error "Could not find required toolchain" "${KERNEL_COMPILER}gcc $KERNEL_USE_GCC"
+	else
+		exit_with_error "Architecture [$ARCH] is not supported"
+	fi
+
+	display_alert "Compiler version" "${KERNEL_COMPILER}gcc $(eval env PATH="${toolchain}:${PATH}" "${KERNEL_COMPILER}gcc" -dumpversion)" "info"
+
+	# copy kernel config
+	if [[ $KERNEL_KEEP_CONFIG == yes && -f "${DEST}"/config/$LINUXCONFIG.config ]]; then
+		display_alert "Using previous kernel config" "${DEST}/config/$LINUXCONFIG.config" "info"
+		cp -p "${DEST}/config/${LINUXCONFIG}.config" .config
+	else
+		if [[ -f $USERPATCHES_PATH/$LINUXCONFIG.config ]]; then
+			display_alert "Using kernel config provided by user" "userpatches/$LINUXCONFIG.config" "info"
+			cp -p "${USERPATCHES_PATH}/${LINUXCONFIG}.config" .config
+		else
+			display_alert "Using kernel config file" "config/kernel/$LINUXCONFIG.config" "info"
+			cp -p "${SRC}/config/kernel/${LINUXCONFIG}.config" .config
+		fi
+	fi
+
+	call_extension_method "custom_kernel_config" << 'CUSTOM_KERNEL_CONFIG'
+*Kernel .config is in place, still clean from git version*
+Called after ${LINUXCONFIG}.config is put in place (.config).
+Before any olddefconfig any Kconfig make is called.
+A good place to customize the .config directly.
+CUSTOM_KERNEL_CONFIG
+
+
+	# hack for OdroidXU4. Copy firmare files
+	if [[ $BOARD == odroidxu4 ]]; then
+		mkdir -p "${kerneldir}/firmware/edid"
+		cp "${SRC}"/packages/blobs/odroidxu4/*.bin "${kerneldir}/firmware/edid"
+	fi
+
+	# hack for deb builder. To pack what's missing in headers pack.
+	cp "${SRC}"/patch/misc/headers-debian-byteshift.patch /tmp
+
+	if [[ $KERNEL_CONFIGURE != yes ]]; then
+		if [[ $BRANCH == default ]]; then
+			eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+				'make ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" silentoldconfig'
+		else
+			# TODO: check if required
+			eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+				'make ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" olddefconfig'
+		fi
+	else
+		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+			'make $CTHREADS ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" oldconfig'
+		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+			'make $CTHREADS ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" ${KERNEL_MENUCONFIG:-menuconfig}'
+
+		[[ ${PIPESTATUS[0]} -ne 0 ]] && exit_with_error "Error kernel menuconfig failed"
+
+		# store kernel config in easily reachable place
+		display_alert "Exporting new kernel config" "$DEST/config/$LINUXCONFIG.config" "info"
+		cp .config "${DEST}/config/${LINUXCONFIG}.config"
+		# export defconfig too if requested
+		if [[ $KERNEL_EXPORT_DEFCONFIG == yes ]]; then
+			eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+				'make ARCH=$ARCHITECTURE CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" savedefconfig'
+			[[ -f defconfig ]] && cp defconfig "${DEST}/config/${LINUXCONFIG}.defconfig"
+		fi
+	fi
+
+	# create linux-source package - with already patched sources
+	# We will build this package first and clear the memory.
+	if [[ $BUILD_KSRC != no ]]; then
+		create_linux-source_package
+	fi
+
+	echo -e "\n\t== kernel ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
+	eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+		'make $CTHREADS ARCH=$ARCHITECTURE \
+		CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" \
+		$SRC_LOADADDR \
+		LOCALVERSION="-$LINUXFAMILY" \
+		$KERNEL_IMAGE_TYPE ${KERNEL_EXTRA_TARGETS:-modules dtbs} 2>>$DEST/${LOG_SUBPATH}/compilation.log' \
+		${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
+		${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" \
+		--progressbox "Compiling kernel..." $TTY_Y $TTY_X'} \
+		${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
+
+	if [[ ${PIPESTATUS[0]} -ne 0 || ! -f arch/$ARCHITECTURE/boot/$KERNEL_IMAGE_TYPE ]]; then
+		grep -i error $DEST/${LOG_SUBPATH}/compilation.log
+		exit_with_error "Kernel was not built" "@host"
+	fi
+
+	# different packaging for 4.3+
+	if linux-version compare "${version}" ge 4.3; then
+		local kernel_packing="bindeb-pkg"
+	else
+		local kernel_packing="deb-pkg"
+	fi
+
+	display_alert "Creating packages"
+
+	# produce deb packages: image, headers, firmware, dtb
+	echo -e "\n\t== deb packages: image, headers, firmware, dtb ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
+	eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${PATH}" \
+		'make $CTHREADS $kernel_packing \
+		KDEB_PKGVERSION=$REVISION \
+		KDEB_COMPRESS=${DEB_COMPRESS} \
+		BRANCH=$BRANCH \
+		LOCALVERSION="-${LINUXFAMILY}" \
+		KBUILD_DEBARCH=$ARCH \
+		ARCH=$ARCHITECTURE \
+		DEBFULLNAME="$MAINTAINER" \
+		DEBEMAIL="$MAINTAINERMAIL" \
+		CROSS_COMPILE="$CCACHE $KERNEL_COMPILER" 2>>$DEST/${LOG_SUBPATH}/compilation.log' \
+		${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
+		${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" --progressbox "Creating kernel packages..." $TTY_Y $TTY_X'} \
+		${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
+
+	cd .. || exit
+	# remove firmare image packages here - easier than patching ~40 packaging scripts at once
+	rm -f linux-firmware-image-*.deb
+
+	rsync --remove-source-files -rq ./*.deb "${DEB_STORAGE}/" || exit_with_error "Failed moving kernel DEBs"
+
+	# store git hash to the file and create a change log
+	HASHTARGET="${SRC}/cache/hash"$([[ ${BETA} == yes ]] && echo "-beta")"/linux-image-${BRANCH}-${LINUXFAMILY}"
+	OLDHASHTARGET=$(head -1 "${HASHTARGET}.githash" 2>/dev/null)
+
+	# check if OLDHASHTARGET commit exists otherwise use oldest
+	if  [[ -z ${KERNEL_VERSION_LEVEL} ]]; then
+		git -C ${kerneldir} cat-file -t ${OLDHASHTARGET} >/dev/null 2>&1
+		[[ $? -ne 0 ]] && OLDHASHTARGET=$(git -C ${kerneldir} show HEAD~199 --pretty=format:"%H" --no-patch)
+	else
+		git -C ${kerneldir} cat-file -t ${OLDHASHTARGET} >/dev/null 2>&1
+		[[ $? -ne 0 ]] && OLDHASHTARGET=$(git -C ${kerneldir} rev-list --max-parents=0 HEAD)
+	fi
+
+	[[ -z ${KERNELPATCHDIR} ]] && KERNELPATCHDIR=$LINUXFAMILY-$BRANCH
+	[[ -z ${LINUXCONFIG} ]] && LINUXCONFIG=linux-$LINUXFAMILY-$BRANCH
+
+	# calculate URL
+	if [[ "$KERNELSOURCE" == *"github.com"* ]]; then
+		URL="${KERNELSOURCE/git:/https:}/commit/${HASH}"
+	elif [[ "$KERNELSOURCE" == *"kernel.org"* ]]; then
+		URL="${KERNELSOURCE/git:/https:}/commit/?h=$(echo $KERNELBRANCH | cut -d":" -f2)&id=${HASH}"
+	else
+		URL="${KERNELSOURCE}/+/$HASH"
+	fi
+
+	# create change log
+	git --no-pager -C ${kerneldir} log --abbrev-commit --oneline --no-patch --no-merges --date-order --date=format:'%Y-%m-%d %H:%M:%S' --pretty=format:'%C(black bold)%ad%Creset%C(auto) | %s | <%an> | <a href='$URL'%H>%H</a>' ${OLDHASHTARGET}..${hash} > "${HASHTARGET}.gitlog"
+
+	# hash origin
+	echo "${hash}" > "${HASHTARGET}.githash"
+
+	# hash_patches
+	CALC_PATCHES=$(git -C $SRC log --format="%H" -1 -- $(realpath --relative-base="$SRC" "${SRC}/patch/kernel/${KERNELPATCHDIR}"))
+	[[ -z "$CALC_PATCHES" ]] && CALC_PATCHES="null"
+	echo "$CALC_PATCHES" >> "${HASHTARGET}.githash"
+
+	# hash_kernel_config
+	CALC_CONFIG=$(git -C $SRC log --format="%H" -1 -- $(realpath --relative-base="$SRC" "${SRC}/config/kernel/${LINUXCONFIG}.config"))
+	[[ -z "$CALC_CONFIG" ]] && CALC_CONFIG="null"
+	echo "$CALC_CONFIG" >> "${HASHTARGET}.githash"
+
+}
diff --git a/lib/functions/compilation/patch/patching.sh b/lib/functions/compilation/patch/patching.sh
new file mode 100644
index 0000000000..f761be5b04
--- /dev/null
+++ b/lib/functions/compilation/patch/patching.sh
@@ -0,0 +1,201 @@
+# advanced_patch <dest> <family> <board> <target> <branch> <description>
+#
+# parameters:
+# <dest>: u-boot, kernel, atf
+# <family>: u-boot: u-boot, u-boot-neo; kernel: sun4i-default, sunxi-next, ...
+# <board>: cubieboard, cubieboard2, cubietruck, ...
+# <target>: optional subdirectory
+# <description>: additional description text
+#
+# priority:
+# $USERPATCHES_PATH/<dest>/<family>/target_<target>
+# $USERPATCHES_PATH/<dest>/<family>/board_<board>
+# $USERPATCHES_PATH/<dest>/<family>/branch_<branch>
+# $USERPATCHES_PATH/<dest>/<family>
+# $SRC/patch/<dest>/<family>/target_<target>
+# $SRC/patch/<dest>/<family>/board_<board>
+# $SRC/patch/<dest>/<family>/branch_<branch>
+# $SRC/patch/<dest>/<family>
+#
+advanced_patch()
+{
+	local dest=$1
+	local family=$2
+	local board=$3
+	local target=$4
+	local branch=$5
+	local description=$6
+
+	display_alert "Started patching process for" "$dest $description" "info"
+	display_alert "Looking for user patches in" "userpatches/$dest/$family" "info"
+
+	local names=()
+	local dirs=(
+		"$USERPATCHES_PATH/$dest/$family/target_${target}:[\e[33mu\e[0m][\e[34mt\e[0m]"
+		"$USERPATCHES_PATH/$dest/$family/board_${board}:[\e[33mu\e[0m][\e[35mb\e[0m]"
+		"$USERPATCHES_PATH/$dest/$family/branch_${branch}:[\e[33mu\e[0m][\e[33mb\e[0m]"
+		"$USERPATCHES_PATH/$dest/$family:[\e[33mu\e[0m][\e[32mc\e[0m]"
+		"$SRC/patch/$dest/$family/target_${target}:[\e[32ml\e[0m][\e[34mt\e[0m]"
+		"$SRC/patch/$dest/$family/board_${board}:[\e[32ml\e[0m][\e[35mb\e[0m]"
+		"$SRC/patch/$dest/$family/branch_${branch}:[\e[32ml\e[0m][\e[33mb\e[0m]"
+		"$SRC/patch/$dest/$family:[\e[32ml\e[0m][\e[32mc\e[0m]"
+		)
+	local links=()
+
+	# required for "for" command
+	shopt -s nullglob dotglob
+	# get patch file names
+	for dir in "${dirs[@]}"; do
+		for patch in ${dir%%:*}/*.patch; do
+			names+=($(basename "${patch}"))
+		done
+		# add linked patch directories
+		if [[ -d ${dir%%:*} ]]; then
+			local findlinks
+			findlinks=$(find "${dir%%:*}" -maxdepth 1 -type l -print0 2>&1 | xargs -0)
+			[[ -n $findlinks ]] && readarray -d '' links < <(find "${findlinks}" -maxdepth 1 -type f -follow -print -iname "*.patch" -print | grep "\.patch$" | sed "s|${dir%%:*}/||g" 2>&1)
+		fi
+	done
+	# merge static and linked
+	names=("${names[@]}" "${links[@]}")
+	# remove duplicates
+	local names_s=($(echo "${names[@]}" | tr ' ' '\n' | LC_ALL=C sort -u | tr '\n' ' '))
+	# apply patches
+	for name in "${names_s[@]}"; do
+		for dir in "${dirs[@]}"; do
+			if [[ -f ${dir%%:*}/$name ]]; then
+				if [[ -s ${dir%%:*}/$name ]]; then
+					process_patch_file "${dir%%:*}/$name" "${dir##*:}"
+				else
+					display_alert "* ${dir##*:} $name" "skipped"
+				fi
+				break # next name
+			fi
+		done
+	done
+}
+
+# process_patch_file <file> <description>
+#
+# parameters:
+# <file>: path to patch file
+# <status>: additional status text
+#
+process_patch_file()
+{
+	local patch=$1
+	local status=$2
+
+	# detect and remove files which patch will create
+	lsdiff -s --strip=1 "${patch}" | grep '^+' | awk '{print $2}' | xargs -I % sh -c 'rm -f %'
+
+	echo "Processing file $patch" >> "${DEST}"/${LOG_SUBPATH}/patching.log
+	patch --batch --silent -p1 -N < "${patch}" >> "${DEST}"/${LOG_SUBPATH}/patching.log 2>&1
+
+	if [[ $? -ne 0 ]]; then
+		display_alert "* $status $(basename "${patch}")" "failed" "wrn"
+		[[ $EXIT_PATCHING_ERROR == yes ]] && exit_with_error "Aborting due to" "EXIT_PATCHING_ERROR"
+	else
+		display_alert "* $status $(basename "${patch}")" "" "info"
+	fi
+	echo >> "${DEST}"/${LOG_SUBPATH}/patching.log
+}
+
+
+# apply_patch_series <target dir> <full path to series file>
+apply_patch_series ()
+{
+	local t_dir="${1}"
+	local series="${2}"
+	local bzdir="$(dirname $series)"
+	local flag
+	local err_pt=$(mktemp /tmp/apply_patch_series_XXXXX)
+
+	list=$(awk '$0 !~ /^#.*|^-.*|^$/' "${series}")
+	skiplist=$(awk '$0 ~ /^-.*/{print $NF}' "${series}")
+
+	display_alert "apply a series of " "[$(echo $list | wc -w)] patches"
+	display_alert "skip [$(echo $skiplist | wc -w)] patches"
+
+	cd "${t_dir}" || exit 1
+	for p in $list
+	do
+		# Detect and remove files as '*.patch' which patch will create.
+		# So we need to delete the file before applying the patch if it exists.
+		lsdiff -s --strip=1 "$bzdir/$p" | \
+		awk '$0 ~ /^+.*patch$/{print $2}' | \
+		xargs -I % sh -c 'rm -f %'
+
+		patch --batch --silent --no-backup-if-mismatch -p1 -N < $bzdir/"$p" >>$err_pt 2>&1
+		flag=$?
+
+
+		case $flag in
+			0)	printf "[\033[32m done \033[0m]    %s\n" "${p}"
+				printf "[ done ]    %s\n" "${p}" >> "${DEST}"/debug/patching.log
+				;;
+			1)
+				printf "[\033[33m FAILED \033[0m]  %s\n" "${p}"
+				echo -e "[ FAILED ]  For ${p} \t\tprocess exit [ $flag ]" >>"${DEST}"/debug/patching.log
+				cat $err_pt >>"${DEST}"/debug/patching.log
+				;;
+			2)
+				printf "[\033[31m Patch wrong \033[0m] %s\n" "${p}"
+				echo -e "Patch wrong ${p}\t\tprocess exit [ $flag ]" >>"${DEST}"/debug/patching.log
+				cat $err_pt >>"${DEST}"/debug/patching.log
+				;;
+		esac
+		echo "" >$err_pt
+	done
+	echo "" >>"${DEST}"/debug/patching.log
+	rm $err_pt
+}
+
+userpatch_create()
+{
+	# create commit to start from clean source
+	git add .
+	git -c user.name='Armbian User' -c user.email='user@example.org' commit -q -m "Cleaning working copy"
+
+	local patch="$DEST/patch/$1-$LINUXFAMILY-$BRANCH.patch"
+
+	# apply previous user debug mode created patches
+	if [[ -f $patch ]]; then
+		display_alert "Applying existing $1 patch" "$patch" "wrn" && patch --batch --silent -p1 -N < "${patch}"
+		# read title of a patch in case Git is configured
+		if [[ -n $(git config user.email) ]]; then
+			COMMIT_MESSAGE=$(cat "${patch}" | grep Subject | sed -n -e '0,/PATCH/s/.*PATCH]//p' | xargs)
+			display_alert "Patch name extracted" "$COMMIT_MESSAGE" "wrn"
+		fi
+	fi
+
+	# prompt to alter source
+	display_alert "Make your changes in this directory:" "$(pwd)" "wrn"
+	display_alert "Press <Enter> after you are done" "waiting" "wrn"
+	read -r </dev/tty
+	tput cuu1
+	git add .
+	# create patch out of changes
+	if ! git diff-index --quiet --cached HEAD; then
+		# If Git is configured, create proper patch and ask for a name
+		if [[ -n $(git config user.email) ]]; then
+			display_alert "Add / change patch name" "$COMMIT_MESSAGE" "wrn"
+			read -e -p "Patch description: " -i "$COMMIT_MESSAGE" COMMIT_MESSAGE
+			[[ -z "$COMMIT_MESSAGE" ]] && COMMIT_MESSAGE="Patching something"
+			git commit -s -m "$COMMIT_MESSAGE"
+			git format-patch -1 HEAD --stdout --signature="Created with Armbian build tools $GITHUB_SOURCE/armbian/build" > "${patch}"
+			PATCHFILE=$(git format-patch -1 HEAD)
+			rm $PATCHFILE # delete the actual file
+			# create a symlink to have a nice name ready
+			find $DEST/patch/ -type l -delete # delete any existing
+			ln -sf $patch $DEST/patch/$PATCHFILE
+		else
+			git diff --staged > "${patch}"
+		fi
+		display_alert "You will find your patch here:" "$patch" "info"
+	else
+		display_alert "No changes found, skipping patch creation" "" "wrn"
+	fi
+	git reset --soft HEAD~
+	for i in {3..1..1}; do echo -n "$i." && sleep 1; done
+}
diff --git a/lib/functions/compilation/uboot.sh b/lib/functions/compilation/uboot.sh
new file mode 100644
index 0000000000..c74e69c6e9
--- /dev/null
+++ b/lib/functions/compilation/uboot.sh
@@ -0,0 +1,210 @@
+compile_uboot()
+{
+	# not optimal, but extra cleaning before overlayfs_wrapper should keep sources directory clean
+	if [[ $CLEAN_LEVEL == *make* ]]; then
+		display_alert "Cleaning" "$BOOTSOURCEDIR" "info"
+		(cd "${SRC}/cache/sources/${BOOTSOURCEDIR}"; make clean > /dev/null 2>&1)
+	fi
+
+	if [[ $USE_OVERLAYFS == yes ]]; then
+		local ubootdir
+		ubootdir=$(overlayfs_wrapper "wrap" "$SRC/cache/sources/$BOOTSOURCEDIR" "u-boot_${LINUXFAMILY}_${BRANCH}")
+	else
+		local ubootdir="$SRC/cache/sources/$BOOTSOURCEDIR"
+	fi
+	cd "${ubootdir}" || exit
+
+	# read uboot version
+	local version hash
+	version=$(grab_version "$ubootdir")
+	hash=$(improved_git --git-dir="$ubootdir"/.git rev-parse HEAD)
+
+	display_alert "Compiling u-boot" "$version" "info"
+
+# build aarch64
+  if [[ $(dpkg --print-architecture) == amd64 ]]; then
+
+	local toolchain
+	toolchain=$(find_toolchain "$UBOOT_COMPILER" "$UBOOT_USE_GCC")
+	[[ -z $toolchain ]] && exit_with_error "Could not find required toolchain" "${UBOOT_COMPILER}gcc $UBOOT_USE_GCC"
+
+	if [[ -n $UBOOT_TOOLCHAIN2 ]]; then
+		local toolchain2_type toolchain2_ver toolchain2
+		toolchain2_type=$(cut -d':' -f1 <<< "${UBOOT_TOOLCHAIN2}")
+		toolchain2_ver=$(cut -d':' -f2 <<< "${UBOOT_TOOLCHAIN2}")
+		toolchain2=$(find_toolchain "$toolchain2_type" "$toolchain2_ver")
+		[[ -z $toolchain2 ]] && exit_with_error "Could not find required toolchain" "${toolchain2_type}gcc $toolchain2_ver"
+	fi
+
+# build aarch64
+  fi
+
+	display_alert "Compiler version" "${UBOOT_COMPILER}gcc $(eval env PATH="${toolchain}:${toolchain2}:${PATH}" "${UBOOT_COMPILER}gcc" -dumpversion)" "info"
+	[[ -n $toolchain2 ]] && display_alert "Additional compiler version" "${toolchain2_type}gcc $(eval env PATH="${toolchain}:${toolchain2}:${PATH}" "${toolchain2_type}gcc" -dumpversion)" "info"
+
+	# create directory structure for the .deb package
+	uboottempdir=$(mktemp -d)
+	chmod 700 ${uboottempdir}
+	trap "ret=\$?; rm -rf \"${uboottempdir}\" ; exit \$ret" 0 1 2 3 15
+	local uboot_name=${CHOSEN_UBOOT}_${REVISION}_${ARCH}
+	rm -rf $uboottempdir/$uboot_name
+	mkdir -p $uboottempdir/$uboot_name/usr/lib/{u-boot,$uboot_name} $uboottempdir/$uboot_name/DEBIAN
+
+	# process compilation for one or multiple targets
+	while read -r target; do
+		local target_make target_patchdir target_files
+		target_make=$(cut -d';' -f1 <<< "${target}")
+		target_patchdir=$(cut -d';' -f2 <<< "${target}")
+		target_files=$(cut -d';' -f3 <<< "${target}")
+
+		# needed for multiple targets and for calling compile_uboot directly
+		display_alert "Checking out to clean sources"
+		improved_git checkout -f -q HEAD
+
+		if [[ $CLEAN_LEVEL == *make* ]]; then
+			display_alert "Cleaning" "$BOOTSOURCEDIR" "info"
+			(cd "${SRC}/cache/sources/${BOOTSOURCEDIR}"; make clean > /dev/null 2>&1)
+		fi
+
+		advanced_patch "u-boot" "$BOOTPATCHDIR" "$BOARD" "$target_patchdir" "$BRANCH" "${LINUXFAMILY}-${BOARD}-${BRANCH}"
+
+		# create patch for manual source changes
+		[[ $CREATE_PATCHES == yes ]] && userpatch_create "u-boot"
+
+		if [[ -n $ATFSOURCE ]]; then
+			cp -Rv "${atftempdir}"/*.bin . 2>/dev/null || \
+			cp -Rv "${atftempdir}"/*.elf . 2>/dev/null
+			[[ $? -ne 0 ]] && exit_with_error "ATF binary not found"
+			rm -rf "${atftempdir}"
+		fi
+
+		echo -e "\n\t== u-boot make $BOOTCONFIG ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
+		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${toolchain2}:${PATH}" \
+			'make $CTHREADS $BOOTCONFIG \
+			CROSS_COMPILE="$CCACHE $UBOOT_COMPILER"' 2>> "${DEST}"/${LOG_SUBPATH}/compilation.log \
+			${PROGRESS_LOG_TO_FILE:+' | tee -a $DEST/${LOG_SUBPATH}/compilation.log'} \
+			${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'}
+
+		# armbian specifics u-boot settings
+		[[ -f .config ]] && sed -i 's/CONFIG_LOCALVERSION=""/CONFIG_LOCALVERSION="-armbian"/g' .config
+		[[ -f .config ]] && sed -i 's/CONFIG_LOCALVERSION_AUTO=.*/# CONFIG_LOCALVERSION_AUTO is not set/g' .config
+
+		# for modern kernel and non spi targets
+		if [[ ${BOOTBRANCH} =~ ^tag:v201[8-9](.*) && ${target} != "spi" && -f .config ]]; then
+
+			sed -i 's/^.*CONFIG_ENV_IS_IN_FAT.*/# CONFIG_ENV_IS_IN_FAT is not set/g' .config
+			sed -i 's/^.*CONFIG_ENV_IS_IN_EXT4.*/CONFIG_ENV_IS_IN_EXT4=y/g' .config
+			sed -i 's/^.*CONFIG_ENV_IS_IN_MMC.*/# CONFIG_ENV_IS_IN_MMC is not set/g' .config
+			sed -i 's/^.*CONFIG_ENV_IS_NOWHERE.*/# CONFIG_ENV_IS_NOWHERE is not set/g' .config | echo \
+			"# CONFIG_ENV_IS_NOWHERE is not set" >> .config
+			echo 'CONFIG_ENV_EXT4_INTERFACE="mmc"' >> .config
+			echo 'CONFIG_ENV_EXT4_DEVICE_AND_PART="0:auto"' >> .config
+			echo 'CONFIG_ENV_EXT4_FILE="/boot/boot.env"' >> .config
+
+		fi
+
+		[[ -f tools/logos/udoo.bmp ]] && cp "${SRC}"/packages/blobs/splash/udoo.bmp tools/logos/udoo.bmp
+		touch .scmversion
+
+		# $BOOTDELAY can be set in board family config, ensure autoboot can be stopped even if set to 0
+		[[ $BOOTDELAY == 0 ]] && echo -e "CONFIG_ZERO_BOOTDELAY_CHECK=y" >> .config
+		[[ -n $BOOTDELAY ]] && sed -i "s/^CONFIG_BOOTDELAY=.*/CONFIG_BOOTDELAY=${BOOTDELAY}/" .config || [[ -f .config ]] && echo "CONFIG_BOOTDELAY=${BOOTDELAY}" >> .config
+
+		# workaround when two compilers are needed
+		cross_compile="CROSS_COMPILE=$CCACHE $UBOOT_COMPILER";
+		[[ -n $UBOOT_TOOLCHAIN2 ]] && cross_compile="ARMBIAN=foe"; # empty parameter is not allowed
+
+		echo -e "\n\t== u-boot make $target_make ==\n" >> "${DEST}"/${LOG_SUBPATH}/compilation.log
+		eval CCACHE_BASEDIR="$(pwd)" env PATH="${toolchain}:${toolchain2}:${PATH}" \
+			'make $target_make $CTHREADS \
+			"${cross_compile}"' 2>>"${DEST}"/${LOG_SUBPATH}/compilation.log \
+			${PROGRESS_LOG_TO_FILE:+' | tee -a "${DEST}"/${LOG_SUBPATH}/compilation.log'} \
+			${OUTPUT_DIALOG:+' | dialog --backtitle "$backtitle" --progressbox "Compiling u-boot..." $TTY_Y $TTY_X'} \
+			${OUTPUT_VERYSILENT:+' >/dev/null 2>/dev/null'} ';EVALPIPE=(${PIPESTATUS[@]})'
+
+		[[ ${EVALPIPE[0]} -ne 0 ]] && exit_with_error "U-boot compilation failed"
+
+		[[ $(type -t uboot_custom_postprocess) == function ]] && uboot_custom_postprocess
+
+		# copy files to build directory
+		for f in $target_files; do
+			local f_src
+			f_src=$(cut -d':' -f1 <<< "${f}")
+			if [[ $f == *:* ]]; then
+				local f_dst
+				f_dst=$(cut -d':' -f2 <<< "${f}")
+			else
+				local f_dst
+				f_dst=$(basename "${f_src}")
+			fi
+			[[ ! -f $f_src ]] && exit_with_error "U-boot file not found" "$(basename "${f_src}")"
+			cp "${f_src}" "$uboottempdir/${uboot_name}/usr/lib/${uboot_name}/${f_dst}"
+		done
+	done <<< "$UBOOT_TARGET_MAP"
+
+	# set up postinstall script
+	if [[ $BOARD == tinkerboard ]]; then
+		cat <<-EOF > "$uboottempdir/${uboot_name}/DEBIAN/postinst"
+		#!/bin/bash
+		source /usr/lib/u-boot/platform_install.sh
+		[[ \$DEVICE == /dev/null ]] && exit 0
+		if [[ -z \$DEVICE ]]; then
+			DEVICE="/dev/mmcblk0"
+			# proceed to other options.
+			[ ! -b \$DEVICE ] && DEVICE="/dev/mmcblk1"
+			[ ! -b \$DEVICE ] && DEVICE="/dev/mmcblk2"
+		fi
+		[[ \$(type -t setup_write_uboot_platform) == function ]] && setup_write_uboot_platform
+		if [[ -b \$DEVICE ]]; then
+			echo "Updating u-boot on \$DEVICE" >&2
+			write_uboot_platform \$DIR \$DEVICE
+			sync
+		else
+			echo "Device \$DEVICE does not exist, skipping" >&2
+		fi
+		exit 0
+		EOF
+		chmod 755 "$uboottempdir/${uboot_name}/DEBIAN/postinst"
+	fi
+
+	# declare -f on non-defined function does not do anything
+	cat <<-EOF > "$uboottempdir/${uboot_name}/usr/lib/u-boot/platform_install.sh"
+	DIR=/usr/lib/$uboot_name
+	$(declare -f write_uboot_platform)
+	$(declare -f write_uboot_platform_mtd)
+	$(declare -f setup_write_uboot_platform)
+	EOF
+
+	# set up control file
+	cat <<-EOF > "$uboottempdir/${uboot_name}/DEBIAN/control"
+	Package: linux-u-boot-${BOARD}-${BRANCH}
+	Version: $REVISION
+	Architecture: $ARCH
+	Maintainer: $MAINTAINER <$MAINTAINERMAIL>
+	Installed-Size: 1
+	Section: kernel
+	Priority: optional
+	Provides: armbian-u-boot
+	Replaces: armbian-u-boot
+	Conflicts: armbian-u-boot, u-boot-sunxi
+	Description: Uboot loader $version
+	EOF
+
+	# copy config file to the package
+	# useful for FEL boot with overlayfs_wrapper
+	[[ -f .config && -n $BOOTCONFIG ]] && cp .config "$uboottempdir/${uboot_name}/usr/lib/u-boot/${BOOTCONFIG}"
+	# copy license files from typical locations
+	[[ -f COPYING ]] && cp COPYING "$uboottempdir/${uboot_name}/usr/lib/u-boot/LICENSE"
+	[[ -f Licenses/README ]] && cp Licenses/README "$uboottempdir/${uboot_name}/usr/lib/u-boot/LICENSE"
+	[[ -n $atftempdir && -f $atftempdir/license.md ]] && cp "${atftempdir}/license.md" "$uboottempdir/${uboot_name}/usr/lib/u-boot/LICENSE.atf"
+
+	display_alert "Building deb" "${uboot_name}.deb" "info"
+	fakeroot dpkg-deb -b -Z${DEB_COMPRESS} "$uboottempdir/${uboot_name}" "$uboottempdir/${uboot_name}.deb" >> "${DEST}"/${LOG_SUBPATH}/output.log 2>&1
+	rm -rf "$uboottempdir/${uboot_name}"
+	[[ -n $atftempdir ]] && rm -rf "${atftempdir}"
+
+	[[ ! -f $uboottempdir/${uboot_name}.deb ]] && exit_with_error "Building u-boot package failed"
+
+	rsync --remove-source-files -rq "$uboottempdir/${uboot_name}.deb" "${DEB_STORAGE}/"
+	rm -rf "$uboottempdir"
+}
diff --git a/lib/functions/compilation/utils-compilation.sh b/lib/functions/compilation/utils-compilation.sh
new file mode 100644
index 0000000000..566c4f1b69
--- /dev/null
+++ b/lib/functions/compilation/utils-compilation.sh
@@ -0,0 +1,101 @@
+grab_version()
+{
+	local ver=()
+	ver[0]=$(grep "^VERSION" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^[[:digit:]]+')
+	ver[1]=$(grep "^PATCHLEVEL" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^[[:digit:]]+')
+	ver[2]=$(grep "^SUBLEVEL" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^[[:digit:]]+')
+	ver[3]=$(grep "^EXTRAVERSION" "${1}"/Makefile | head -1 | awk '{print $(NF)}' | grep -oE '^-rc[[:digit:]]+')
+	echo "${ver[0]:-0}${ver[1]:+.${ver[1]}}${ver[2]:+.${ver[2]}}${ver[3]}"
+}
+
+# find_toolchain <compiler_prefix> <expression>
+#
+# returns path to toolchain that satisfies <expression>
+#
+find_toolchain()
+{
+	[[ "${SKIP_EXTERNAL_TOOLCHAINS}" == "yes" ]] && { echo "/usr/bin"; return; }
+	local compiler=$1
+	local expression=$2
+	local dist=10
+	local toolchain=""
+	# extract target major.minor version from expression
+	local target_ver
+	target_ver=$(grep -oE "[[:digit:]]+\.[[:digit:]]" <<< "$expression")
+	for dir in "${SRC}"/cache/toolchain/*/; do
+		# check if is a toolchain for current $ARCH
+		[[ ! -f ${dir}bin/${compiler}gcc ]] && continue
+		# get toolchain major.minor version
+		local gcc_ver
+		gcc_ver=$("${dir}bin/${compiler}gcc" -dumpversion | grep -oE "^[[:digit:]]+\.[[:digit:]]")
+		# check if toolchain version satisfies requirement
+		awk "BEGIN{exit ! ($gcc_ver $expression)}" >/dev/null || continue
+		# check if found version is the closest to target
+		# may need different logic here with more than 1 digit minor version numbers
+		# numbers: 3.9 > 3.10; versions: 3.9 < 3.10
+		# dpkg --compare-versions can be used here if operators are changed
+		local d
+		d=$(awk '{x = $1 - $2}{printf "%.1f\n", (x > 0) ? x : -x}' <<< "$target_ver $gcc_ver")
+		if awk "BEGIN{exit ! ($d < $dist)}" >/dev/null ; then
+			dist=$d
+			toolchain=${dir}bin
+		fi
+	done
+	echo "$toolchain"
+	# logging a stack of used compilers.
+	if [[ -f "${DEST}"/${LOG_SUBPATH}/compiler.log ]]; then
+		if ! grep -q "$toolchain" "${DEST}"/${LOG_SUBPATH}/compiler.log; then
+			echo "$toolchain" >> "${DEST}"/${LOG_SUBPATH}/compiler.log;
+		fi
+	else
+			echo "$toolchain" >> "${DEST}"/${LOG_SUBPATH}/compiler.log;
+	fi
+}
+
+# overlayfs_wrapper <operation> <workdir> <description>
+#
+# <operation>: wrap|cleanup
+# <workdir>: path to source directory
+# <description>: suffix for merged directory to help locating it in /tmp
+# return value: new directory
+#
+# Assumptions/notes:
+# - Ubuntu Xenial host
+# - /tmp is mounted as tmpfs
+# - there is enough space on /tmp
+# - UB if running multiple compilation tasks in parallel
+# - should not be used with CREATE_PATCHES=yes
+#
+overlayfs_wrapper()
+{
+	local operation="$1"
+	if [[ $operation == wrap ]]; then
+		local srcdir="$2"
+		local description="$3"
+		mkdir -p /tmp/overlay_components/ /tmp/armbian_build/
+		local tempdir workdir mergeddir
+		tempdir=$(mktemp -d --tmpdir="/tmp/overlay_components/")
+		workdir=$(mktemp -d --tmpdir="/tmp/overlay_components/")
+		mergeddir=$(mktemp -d --suffix="_$description" --tmpdir="/tmp/armbian_build/")
+		mount -t overlay overlay -o lowerdir="$srcdir",upperdir="$tempdir",workdir="$workdir" "$mergeddir"
+		# this is executed in a subshell, so use temp files to pass extra data outside
+		echo "$tempdir" >> /tmp/.overlayfs_wrapper_cleanup
+		echo "$mergeddir" >> /tmp/.overlayfs_wrapper_umount
+		echo "$mergeddir" >> /tmp/.overlayfs_wrapper_cleanup
+		echo "$mergeddir"
+		return
+	fi
+	if [[ $operation == cleanup ]]; then
+		if [[ -f /tmp/.overlayfs_wrapper_umount ]]; then
+			for dir in $(</tmp/.overlayfs_wrapper_umount); do
+				[[ $dir == /tmp/* ]] && umount -l "$dir" > /dev/null 2>&1
+			done
+		fi
+		if [[ -f /tmp/.overlayfs_wrapper_cleanup ]]; then
+			for dir in $(</tmp/.overlayfs_wrapper_cleanup); do
+				[[ $dir == /tmp/* ]] && rm -rf "$dir"
+			done
+		fi
+		rm -f /tmp/.overlayfs_wrapper_umount /tmp/.overlayfs_wrapper_cleanup
+	fi
+}
diff --git a/lib/main.sh b/lib/main.sh
index c9d97d8218..a4b53c9016 100644
--- a/lib/main.sh
+++ b/lib/main.sh
@@ -64,8 +64,6 @@ backtitle="Armbian building script, https://www.armbian.com | https://docs.armbi
 # shellcheck source=import-functions.sh
 source "${SRC}/lib/import-functions.sh"
 
-# shellcheck source=compilation.sh
-source "${SRC}"/lib/compilation.sh                          # patching and compilation of kernel, uboot, ATF
 # shellcheck source=compilation-prepare.sh
 source "${SRC}"/lib/compilation-prepare.sh                  # drivers that are not upstreamed
 # shellcheck source=makeboarddeb.sh