diff --git a/eclass/kernel-2-src-prepare-overlay.eclass b/eclass/kernel-2-src-prepare-overlay.eclass
new file mode 100644
index 0000000..955ef95
--- /dev/null
+++ b/eclass/kernel-2-src-prepare-overlay.eclass
@@ -0,0 +1,1658 @@
+# Copyright 1999-2019 Gentoo Authors
+# Distributed under the terms of the GNU General Public License v2
+
+# @ECLASS: kernel-2-src-prepare-overlay.eclass
+# @MAINTAINER:
+# Gentoo Kernel project <kernel@gentoo.org>
+# @AUTHOR:
+# John Mylchreest <johnm@gentoo.org>
+# Mike Pagano <mpagano@gentoo.org>
+# <so many, many others, please add yourself>
+# @SUPPORTED_EAPIS: 2 3 4 5 6
+# @BLURB: Eclass for kernel packages
+# @DESCRIPTION:
+# This is the kernel.eclass rewrite for a clean base regarding the 2.6
+# series of kernel with back-compatibility for 2.4
+# Please direct your bugs to the current eclass maintainer :)
+# added functionality:
+# unipatch		- a flexible, singular method to extract, add and remove patches.
+
+# @ECLASS-VARIABLE: K_USEPV
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# When setting the EXTRAVERSION variable, it should
+# add PV to the end.
+# this is useful for things like wolk. IE:
+# EXTRAVERSION would be something like : -wolk-4.19-r1
+
+# @ECLASS-VARIABLE:  K_NOSETEXTRAVERSION
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# if this is set then EXTRAVERSION will not be
+# automatically set within the kernel Makefile
+
+# @ECLASS-VARIABLE: K_NOUSENAME
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# if this is set then EXTRAVERSION will not include the
+# first part of ${PN} in EXTRAVERSION
+
+# @ECLASS-VARIABLE: K_NOUSEPR
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# if this is set then EXTRAVERSION will not include the
+# anything based on ${PR}.
+
+# @ECLASS-VARIABLE: K_PREPATCHED
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# if the patchset is prepatched (ie: mm-sources,
+# ck-sources, ac-sources) it will use PR (ie: -r5) as
+# the patchset version for
+# and not use it as a true package revision
+
+# @ECLASS-VARIABLE:  K_EXTRAEINFO
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# this is a new-line seperated list of einfo displays in
+# postinst and can be used to carry additional postinst
+# messages
+
+# @ECLASS-VARIABLE:  K_EXTRAELOG
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# same as K_EXTRAEINFO except using elog instead of einfo
+
+# @ECLASS-VARIABLE:  K_EXTRAEWARN
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# same as K_EXTRAEINFO except using ewarn instead of einfo
+
+# @ECLASS-VARIABLE:  K_SYMLINK
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# if this is set, then forcably create symlink anyway
+
+# @ECLASS-VARIABLE:  K_BASE_VER
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# for git-sources, declare the base version this patch is
+# based off of.
+
+# @ECLASS-VARIABLE:  K_DEFCONFIG
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Allow specifying a different defconfig target.
+# If length zero, defaults to "defconfig".
+
+# @ECLASS-VARIABLE:  K_WANT_GENPATCHES
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# Apply genpatches to kernel source. Provide any
+# combination of "base", "extras" or "experimental".
+
+# @ECLASS-VARIABLE:  K_EXP_GENPATCHES_PULL
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# If set, we pull "experimental" regardless of the USE FLAG
+# but expect the ebuild maintainer to use K_EXP_GENPATCHES_LIST.
+
+# @ECLASS-VARIABLE:  K_EXP_GENPATCHES_NOUSE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# If set, no USE flag will be provided for "experimental";
+# as a result the user cannot choose to apply those patches.
+
+# @ECLASS-VARIABLE:  K_EXP_GENPATCHES_LIST
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# A list of patches to pick from "experimental" to apply when
+# the USE flag is unset and K_EXP_GENPATCHES_PULL is set.
+
+# @ECLASS-VARIABLE:  K_FROM_GIT
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# If set, this variable signals that the kernel sources derives
+# from a git tree and special handling will be applied so that
+# any patches that are applied will actually apply.
+
+# @ECLASS-VARIABLE:  K_GENPATCHES_VER
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# The version of the genpatches tarball(s) to apply.
+# A value of "5" would apply genpatches-2.6.12-5 to
+# my-sources-2.6.12.ebuild
+
+# @ECLASS-VARIABLE:  K_SECURITY_UNSUPPORTED
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# If set, this kernel is unsupported by Gentoo Security
+# to the current eclass maintainer :)
+
+# @ECLASS-VARIABLE:  K_DEBLOB_AVAILABLE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# A value of "0" will disable all of the optional deblob
+# code. If empty, will be set to "1" if deblobbing is
+# possible. Test ONLY for "1".
+
+# @ECLASS-VARIABLE:  K_DEBLOB_TAG
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# This will be the version of deblob script. It's a upstream SVN tag
+# such asw -gnu or -gnu1.
+
+# @ECLASS-VARIABLE:  K_PREDEBLOBBED
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# This kernel was already deblobbed elsewhere.
+# If false, either optional deblobbing will be available
+# or the license will note the inclusion of linux-firmware code.
+
+# @ECLASS-VARIABLE:  K_LONGTERM
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# If set, the eclass will search for the kernel source
+# in the long term directories on the upstream servers
+# as the location has been changed by upstream
+
+# @ECLASS-VARIABLE:  H_SUPPORTEDARCH
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# this should be a space separated list of ARCH's which
+# can be supported by the headers ebuild
+
+# @ECLASS-VARIABLE:  UNIPATCH_LIST
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# space delimetered list of patches to be applied to the kernel
+
+# @ECLASS-VARIABLE:  UNIPATCH_EXCLUDE
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# An addition var to support exlusion based completely
+# on "<passedstring>*" and not "<passedno#>_*"
+# this should _NOT_ be used from the ebuild as this is
+# reserved for end users passing excludes from the cli
+
+# @ECLASS-VARIABLE:  UNIPATCH_DOCS
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# space delimemeted list of docs to be installed to
+# the doc dir
+
+# @ECLASS-VARIABLE:  UNIPATCH_STRICTORDER
+# @DEFAULT_UNSET
+# @DESCRIPTION:
+# if this is set places patches into directories of
+# order, so they are applied in the order passed
+# Changing any other variable in this eclass is not supported; you can request
+# for additional variables to be added by contacting the current maintainer.
+# If you do change them, there is a chance that we will not fix resulting bugs;
+# that of course does not mean we're not willing to help.
+
+inherit toolchain-funcs
+[[ ${EAPI:-0} == [012345] ]] && inherit epatch
+[[ ${EAPI:-0} == [0123456] ]] && inherit estack eapi7-ver
+case ${EAPI:-0} in
+	2|3|4|5|6)
+		EXPORT_FUNCTIONS src_{unpack,prepare,compile,install,test} \
+			pkg_{setup,preinst,postinst,postrm} ;;
+	*) die "${ECLASS}: EAPI ${EAPI} not supported" ;;
+esac
+
+# Added by Daniel Ostrow <dostrow@gentoo.org>
+# This is an ugly hack to get around an issue with a 32-bit userland on ppc64.
+# I will remove it when I come up with something more reasonable.
+[[ ${PROFILE_ARCH} == "ppc64" ]] && CHOST="powerpc64-${CHOST#*-}"
+
+export CTARGET=${CTARGET:-${CHOST}}
+if [[ ${CTARGET} == ${CHOST} && ${CATEGORY/cross-} != ${CATEGORY} ]]; then
+	export CTARGET=${CATEGORY/cross-}
+fi
+
+HOMEPAGE="https://www.kernel.org/ https://wiki.gentoo.org/wiki/Kernel ${HOMEPAGE}"
+: ${LICENSE:="GPL-2"}
+
+# This is the latest KV_PATCH of the deblob tool available from the
+# libre-sources upstream. If you bump this, you MUST regenerate the Manifests
+# for ALL kernel-2-src-prepare-overlay consumer packages where deblob is available.
+: ${DEBLOB_MAX_VERSION:=38}
+
+# No need to run scanelf/strip on kernel sources/headers (bug #134453).
+RESTRICT="binchecks strip"
+
+# set LINUX_HOSTCFLAGS if not already set
+: ${LINUX_HOSTCFLAGS:="-Wall -Wstrict-prototypes -Os -fomit-frame-pointer -I${S}/include"}
+
+
+# @FUNCTION: debug-print-kernel2-variables
+# @USAGE:
+# @DESCRIPTION:
+# this function exists only to help debug kernel-2-src-prepare-overlay.eclass
+# if you are adding new functionality in, put a call to it
+# at the start of src_unpack, or during SRC_URI/dep generation.
+
+debug-print-kernel2-variables() {
+	for v in PVR CKV OKV KV KV_FULL KV_MAJOR KV_MINOR KV_PATCH RELEASETYPE \
+			RELEASE UNIPATCH_LIST_DEFAULT UNIPATCH_LIST_GENPATCHES \
+			UNIPATCH_LIST S KERNEL_URI K_WANT_GENPATCHES ; do
+		debug-print "${v}: ${!v}"
+	done
+}
+
+# @FUNCTION: handle_genpatches
+# @USAGE: [--set-unipatch-list]
+# @DESCRIPTION:
+# add genpatches to list of patches to apply if wanted
+
+handle_genpatches() {
+	local tarball want_unipatch_list
+	[[ -z ${K_WANT_GENPATCHES} || -z ${K_GENPATCHES_VER} ]] && return 1
+
+	if [[ -n ${1} ]]; then
+		# set UNIPATCH_LIST_GENPATCHES only on explicit request
+		# since that requires 'use' call which can be used only in phase
+		# functions, while the function is also called in global scope
+		if [[ ${1} == --set-unipatch-list ]]; then
+			want_unipatch_list=1
+		else
+			die "Usage: ${FUNCNAME} [--set-unipatch-list]"
+		fi
+	fi
+
+	debug-print "Inside handle_genpatches"
+	local OKV_ARRAY
+	IFS="." read -r -a OKV_ARRAY <<<"${OKV}"
+
+	# for > 3.0 kernels, handle genpatches tarball name
+	# genpatches for 3.0 and 3.0.1 might be named
+	# genpatches-3.0-1.base.tar.xz and genpatches-3.0-2.base.tar.xz
+	# respectively.  Handle this.
+
+	for i in ${K_WANT_GENPATCHES} ; do
+		if [[ ${KV_MAJOR} -ge 3 ]]; then
+			if [[ ${#OKV_ARRAY[@]} -ge 3 ]]; then
+				tarball="genpatches-${KV_MAJOR}.${KV_MINOR}-${K_GENPATCHES_VER}.${i}.tar.xz"
+			else
+				tarball="genpatches-${KV_MAJOR}.${KV_PATCH}-${K_GENPATCHES_VER}.${i}.tar.xz"
+			fi
+		else
+			tarball="genpatches-${OKV}-${K_GENPATCHES_VER}.${i}.tar.xz"
+		fi
+
+		local use_cond_start="" use_cond_end=""
+
+		if [[ "${i}" == "experimental" && -z ${K_EXP_GENPATCHES_PULL} && -z ${K_EXP_GENPATCHES_NOUSE} ]] ; then
+			use_cond_start="experimental? ( "
+			use_cond_end=" )"
+
+			if [[ -n ${want_unipatch_list} ]] && use experimental ; then
+				UNIPATCH_LIST_GENPATCHES+=" ${DISTDIR}/${tarball}"
+				debug-print "genpatches tarball: $tarball"
+			fi
+		elif [[ -n ${want_unipatch_list} ]]; then
+			UNIPATCH_LIST_GENPATCHES+=" ${DISTDIR}/${tarball}"
+			debug-print "genpatches tarball: $tarball"
+		fi
+		GENPATCHES_URI+=" ${use_cond_start}$(echo https://dev.gentoo.org/~{alicef,mpagano,whissi}/dist/genpatches/${tarball})${use_cond_end}"
+	done
+}
+
+# @FUNCTION: detect_version
+# @USAGE:
+# @DESCRIPTION:
+# this function will detect and set
+# - OKV: Original Kernel Version (2.6.0/2.6.0-test11)
+# - KV: Kernel Version (2.6.0-gentoo/2.6.0-test11-gentoo-r1)
+# - EXTRAVERSION: The additional version appended to OKV (-gentoo/-gentoo-r1)
+detect_version() {
+
+	# We've already run, so nothing to do here.
+	[[ -n ${KV_FULL} ]] && return 0
+
+	# CKV is used as a comparison kernel version, which is used when
+	# PV doesnt reflect the genuine kernel version.
+	# this gets set to the portage style versioning. ie:
+	#   CKV=2.6.11_rc4
+	CKV=${CKV:-${PV}}
+	OKV=${OKV:-${CKV}}
+	OKV=${OKV/_beta/-test}
+	OKV=${OKV/_rc/-rc}
+	OKV=${OKV/-r*}
+	OKV=${OKV/_p*}
+
+	KV_MAJOR=$(ver_cut 1 ${OKV})
+	# handle if OKV is X.Y or X.Y.Z (e.g. 3.0 or 3.0.1)
+	local OKV_ARRAY
+	IFS="." read -r -a OKV_ARRAY <<<"${OKV}"
+
+	# if KV_MAJOR >= 3, then we have no more KV_MINOR
+	#if [[ ${KV_MAJOR} -lt 3 ]]; then
+	if [[ ${#OKV_ARRAY[@]} -ge 3 ]]; then
+		KV_MINOR=$(ver_cut 2 ${OKV})
+		KV_PATCH=$(ver_cut 3 ${OKV})
+		if [[ ${KV_MAJOR}${KV_MINOR}${KV_PATCH} -ge 269 ]]; then
+			KV_EXTRA=$(ver_cut 4- ${OKV})
+			KV_EXTRA=${KV_EXTRA/[-_]*}
+		else
+			KV_PATCH=$(ver_cut 3- ${OKV})
+		fi
+	else
+		KV_PATCH=$(ver_cut 2 ${OKV})
+		KV_EXTRA=$(ver_cut 3- ${OKV})
+		KV_EXTRA=${KV_EXTRA/[-_]*}
+	fi
+
+	debug-print "KV_EXTRA is ${KV_EXTRA}"
+
+	KV_PATCH=${KV_PATCH/[-_]*}
+
+	local v n=0 missing
+	#if [[ ${KV_MAJOR} -lt 3 ]]; then
+	if [[ ${#OKV_ARRAY[@]} -ge 3 ]]; then
+		for v in CKV OKV KV_{MAJOR,MINOR,PATCH} ; do
+			[[ -z ${!v} ]] && n=1 && missing="${missing}${v} ";
+		done
+	else
+		for v in CKV OKV KV_{MAJOR,PATCH} ; do
+			[[ -z ${!v} ]] && n=1 && missing="${missing}${v} ";
+		done
+	fi
+
+	[[ $n -eq 1 ]] && \
+		eerror "Missing variables: ${missing}" && \
+		die "Failed to extract kernel version (try explicit CKV in ebuild)!"
+	unset v n missing
+
+#	if [[ ${KV_MAJOR} -ge 3 ]]; then
+	if [[ ${#OKV_ARRAY[@]} -lt 3 ]]; then
+		KV_PATCH_ARR=(${KV_PATCH//\./ })
+
+		# at this point 031412, Linus is putting all 3.x kernels in a
+		# 3.x directory, may need to revisit when 4.x is released
+		KERNEL_BASE_URI="https://www.kernel.org/pub/linux/kernel/v${KV_MAJOR}.x"
+
+		[[ -n "${K_LONGTERM}" ]] &&
+			KERNEL_BASE_URI="${KERNEL_BASE_URI}/longterm/v${KV_MAJOR}.${KV_PATCH_ARR}"
+	else
+		#KERNEL_BASE_URI="https://www.kernel.org/pub/linux/kernel/v${KV_MAJOR}.0"
+		#KERNEL_BASE_URI="https://www.kernel.org/pub/linux/kernel/v${KV_MAJOR}.${KV_MINOR}"
+		if [[ ${KV_MAJOR} -ge 3 ]]; then
+			KERNEL_BASE_URI="https://www.kernel.org/pub/linux/kernel/v${KV_MAJOR}.x"
+		else
+			KERNEL_BASE_URI="https://www.kernel.org/pub/linux/kernel/v${KV_MAJOR}.${KV_MINOR}"
+		fi
+
+		[[ -n "${K_LONGTERM}" ]] &&
+			#KERNEL_BASE_URI="${KERNEL_BASE_URI}/longterm"
+			KERNEL_BASE_URI="${KERNEL_BASE_URI}/longterm/v${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}"
+	fi
+
+	debug-print "KERNEL_BASE_URI is ${KERNEL_BASE_URI}"
+
+	if [[ ${#OKV_ARRAY[@]} -ge 3 ]] && [[ ${KV_MAJOR} -ge 3 ]]; then
+		# handle non genpatch using sources correctly
+		if [[ -z ${K_WANT_GENPATCHES} && -z ${K_GENPATCHES_VER} && ${KV_PATCH} -gt 0 ]]; then
+			KERNEL_URI="${KERNEL_BASE_URI}/patch-${OKV}.xz"
+			UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${CKV}.xz"
+		fi
+		KERNEL_URI="${KERNEL_URI} ${KERNEL_BASE_URI}/linux-${KV_MAJOR}.${KV_MINOR}.tar.xz"
+	else
+		KERNEL_URI="${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+	fi
+
+	RELEASE=${CKV/${OKV}}
+	RELEASE=${RELEASE/_beta}
+	RELEASE=${RELEASE/_rc/-rc}
+	RELEASE=${RELEASE/_pre/-pre}
+	# We cannot trivally call kernel_is here, because it calls us to detect the
+	# version
+	#kernel_is ge 2 6 && RELEASE=${RELEASE/-pre/-git}
+	[ $(($KV_MAJOR * 1000 + ${KV_MINOR:-0})) -ge 2006 ] && RELEASE=${RELEASE/-pre/-git}
+	RELEASETYPE=${RELEASE//[0-9]}
+
+	# Now we know that RELEASE is the -rc/-git
+	# and RELEASETYPE is the same but with its numerics stripped
+	# we can work on better sorting EXTRAVERSION.
+	# first of all, we add the release
+	EXTRAVERSION="${RELEASE}"
+	debug-print "0 EXTRAVERSION:${EXTRAVERSION}"
+	[[ -n ${KV_EXTRA} ]] && [[ ${KV_MAJOR} -lt 3 ]] && EXTRAVERSION=".${KV_EXTRA}${EXTRAVERSION}"
+
+	debug-print "1 EXTRAVERSION:${EXTRAVERSION}"
+	if [[ -n "${K_NOUSEPR}" ]]; then
+		# Don't add anything based on PR to EXTRAVERSION
+		debug-print "1.0 EXTRAVERSION:${EXTRAVERSION}"
+	elif [[ -n ${K_PREPATCHED} ]]; then
+		debug-print "1.1 EXTRAVERSION:${EXTRAVERSION}"
+		EXTRAVERSION="${EXTRAVERSION}-${PN/-*}${PR/r}"
+	elif [[ "${ETYPE}" = "sources" ]]; then
+		debug-print "1.2 EXTRAVERSION:${EXTRAVERSION}"
+		# For some sources we want to use the PV in the extra version
+		# This is because upstream releases with a completely different
+		# versioning scheme.
+		case ${PN/-*} in
+		     wolk) K_USEPV=1;;
+		  vserver) K_USEPV=1;;
+		esac
+
+		[[ -z "${K_NOUSENAME}" ]] && EXTRAVERSION="${EXTRAVERSION}-${PN/-*}"
+		[[ -n "${K_USEPV}" ]]     && EXTRAVERSION="${EXTRAVERSION}-${PV//_/-}"
+		[[ -n "${PR//r0}" ]] && EXTRAVERSION="${EXTRAVERSION}-${PR}"
+	fi
+	debug-print "2 EXTRAVERSION:${EXTRAVERSION}"
+
+	# The only messing around which should actually effect this is for KV_EXTRA
+	# since this has to limit OKV to MAJ.MIN.PAT and strip EXTRA off else
+	# KV_FULL evaluates to MAJ.MIN.PAT.EXT.EXT after EXTRAVERSION
+
+	if [[ -n ${KV_EXTRA} ]]; then
+		if [[ -n ${KV_MINOR} ]]; then
+			OKV="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}"
+		else
+			OKV="${KV_MAJOR}.${KV_PATCH}"
+		fi
+		KERNEL_URI="${KERNEL_BASE_URI}/patch-${CKV}.xz
+					${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+		UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${CKV}.xz"
+	fi
+
+	# We need to set this using OKV, but we need to set it before we do any
+	# messing around with OKV based on RELEASETYPE
+	KV_FULL=${OKV}${EXTRAVERSION}
+
+	# we will set this for backwards compatibility.
+	S="${WORKDIR}"/linux-${KV_FULL}
+	KV=${KV_FULL}
+
+	# -rc-git pulls can be achieved by specifying CKV
+	# for example:
+	#   CKV="2.6.11_rc3_pre2"
+	# will pull:
+	#   linux-2.6.10.tar.xz & patch-2.6.11-rc3.xz & patch-2.6.11-rc3-git2.xz
+
+	if [[ ${KV_MAJOR}${KV_MINOR} -eq 26 ]]; then
+
+		if [[ ${RELEASETYPE} == -rc ]] || [[ ${RELEASETYPE} == -pre ]]; then
+			OKV="${KV_MAJOR}.${KV_MINOR}.$((${KV_PATCH} - 1))"
+			KERNEL_URI="${KERNEL_BASE_URI}/testing/patch-${CKV//_/-}.xz
+						${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+			UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${CKV//_/-}.xz"
+		fi
+
+		if [[ ${RELEASETYPE} == -git ]]; then
+			KERNEL_URI="${KERNEL_BASE_URI}/snapshots/patch-${OKV}${RELEASE}.xz
+						${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+			UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${OKV}${RELEASE}.xz"
+		fi
+
+		if [[ ${RELEASETYPE} == -rc-git ]]; then
+			OKV="${KV_MAJOR}.${KV_MINOR}.$((${KV_PATCH} - 1))"
+			KERNEL_URI="${KERNEL_BASE_URI}/snapshots/patch-${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${RELEASE}.xz
+						${KERNEL_BASE_URI}/testing/patch-${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${RELEASE/-git*}.xz
+						${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+
+			UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${RELEASE/-git*}.xz ${DISTDIR}/patch-${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}${RELEASE}.xz"
+		fi
+	else
+		KV_PATCH_ARR=(${KV_PATCH//\./ })
+
+		# the different majorminor versions have different patch start versions
+		OKV_DICT=(["2"]="${KV_MAJOR}.$((${KV_PATCH_ARR} - 1))" ["3"]="2.6.39" ["4"]="3.19")
+
+		if [[ ${RELEASETYPE} == -rc ]] || [[ ${RELEASETYPE} == -pre ]]; then
+
+			OKV=${K_BASE_VER:-$OKV_DICT["${KV_MAJOR}"]}
+
+			# as of 12/5/2017, the rc patch is no longer offered as a compressed
+			# file, and no longer is it mirrored on kernel.org
+			if ver_test "${KV_MAJOR}.${KV_PATCH}" -ge "4.12"; then
+				KERNEL_URI="https://git.kernel.org/torvalds/p/v${KV_FULL}/v${OKV} -> patch-${KV_FULL}.patch
+							${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+				UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${CKV//_/-}.patch"
+			else
+				KERNEL_URI="${KERNEL_BASE_URI}/testing/patch-${CKV//_/-}.xz
+							${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+				UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${CKV//_/-}.xz"
+			fi
+		fi
+
+		if [[ ${RELEASETYPE} == -git ]]; then
+			KERNEL_URI="${KERNEL_BASE_URI}/snapshots/patch-${OKV}${RELEASE}.xz
+						${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+			UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${OKV}${RELEASE}.xz"
+		fi
+
+		if [[ ${RELEASETYPE} == -rc-git ]]; then
+			OKV=${K_BASE_VER:-$OKV_DICT["${KV_MAJOR}"]}
+			KERNEL_URI="${KERNEL_BASE_URI}/snapshots/patch-${KV_MAJOR}.${KV_PATCH}${RELEASE}.xz
+						${KERNEL_BASE_URI}/testing/patch-${KV_MAJOR}.${KV_PATCH}${RELEASE/-git*}.xz
+						${KERNEL_BASE_URI}/linux-${OKV}.tar.xz"
+
+			UNIPATCH_LIST_DEFAULT="${DISTDIR}/patch-${KV_MAJOR}.${KV_PATCH}${RELEASE/-git*}.xz ${DISTDIR}/patch-${KV_MAJOR}.${KV_PATCH}${RELEASE}.xz"
+		fi
+
+
+	fi
+
+	debug-print-kernel2-variables
+
+	handle_genpatches
+}
+
+# @FUNCTION: kernel_is
+# @USAGE: <conditional version | version>
+# @DESCRIPTION:
+# user for comparing kernel versions
+# or just identifying a version
+# e.g kernel_is 2 4
+# e.g kernel_is ge 4.8.11
+# Note: duplicated in linux-info.eclass
+kernel_is() {
+	# ALL of these should be set before we can safely continue this function.
+	# some of the sources have in the past had only one set.
+	local v n=0
+	for v in OKV KV_{MAJOR,MINOR,PATCH} ; do [[ -z ${!v} ]] && n=1 ; done
+	[[ $n -eq 1 ]] && detect_version
+	unset v n
+
+	# Now we can continue
+	local operator test value
+
+	case ${1#-} in
+	  lt) operator="-lt"; shift;;
+	  gt) operator="-gt"; shift;;
+	  le) operator="-le"; shift;;
+	  ge) operator="-ge"; shift;;
+	  eq) operator="-eq"; shift;;
+	   *) operator="-eq";;
+	esac
+	[[ $# -gt 3 ]] && die "Error in kernel-2-src-prepare-overlay_kernel_is(): too many parameters"
+
+	: $(( test = (KV_MAJOR << 16) + (KV_MINOR << 8) + KV_PATCH ))
+	: $(( value = (${1:-${KV_MAJOR}} << 16) + (${2:-${KV_MINOR}} << 8) + ${3:-${KV_PATCH}} ))
+	[ ${test} ${operator} ${value} ]
+}
+
+# @FUNCTION: kernel_is_2_4
+# @USAGE:
+# @DESCRIPTION:
+# return true if kernel is version 2.4
+kernel_is_2_4() {
+	kernel_is 2 4
+}
+
+# @FUNCTION: kernel_is_2_6
+# @USAGE:
+# @DESCRIPTION:
+# return true if kernel is version 2.6
+kernel_is_2_6() {
+	kernel_is 2 6 || kernel_is 2 5
+}
+
+# Capture the sources type and set DEPENDs
+if [[ ${ETYPE} == sources ]]; then
+	DEPEND="!build? (
+		sys-apps/sed
+		>=sys-devel/binutils-2.11.90.0.31
+		sys-devel/bison
+		sys-devel/flex
+	)"
+	RDEPEND="!build? (
+		dev-lang/perl
+		sys-devel/bc
+		sys-devel/make
+		>=sys-libs/ncurses-5.2
+		virtual/libelf
+	)"
+
+	SLOT="${PVR}"
+	DESCRIPTION="Sources based on the Linux Kernel."
+	IUSE="symlink build"
+
+	# Bug #266157, deblob for libre support
+	if [[ -z ${K_PREDEBLOBBED} ]] ; then
+		# Bug #359865, force a call to detect_version if needed
+		kernel_is ge 2 6 27 && \
+			[[ -z "${K_DEBLOB_AVAILABLE}" ]] && \
+				kernel_is le 2 6 ${DEBLOB_MAX_VERSION} && \
+					K_DEBLOB_AVAILABLE=1
+		if [[ ${K_DEBLOB_AVAILABLE} == "1" ]] ; then
+			PYTHON_COMPAT=( python2_7 )
+
+			inherit python-any-r1
+
+			IUSE="${IUSE} deblob"
+
+			# Reflect that kernels contain firmware blobs unless otherwise
+			# stripped. Starting with version 4.14, the whole firmware
+			# tree has been dropped from the kernel.
+			kernel_is lt 4 14 && LICENSE+=" !deblob? ( linux-firmware )"
+
+			DEPEND+=" deblob? ( ${PYTHON_DEPS} )"
+
+			if [[ -n KV_MINOR ]]; then
+				DEBLOB_PV="${KV_MAJOR}.${KV_MINOR}.${KV_PATCH}"
+			else
+				DEBLOB_PV="${KV_MAJOR}.${KV_PATCH}"
+			fi
+
+			if [[ ${KV_MAJOR} -ge 3 ]]; then
+				DEBLOB_PV="${KV_MAJOR}.${KV_MINOR}"
+			fi
+
+			# deblob svn tag, default is -gnu, to change, use K_DEBLOB_TAG in ebuild
+			K_DEBLOB_TAG=${K_DEBLOB_TAG:--gnu}
+			DEBLOB_A="deblob-${DEBLOB_PV}"
+			DEBLOB_CHECK_A="deblob-check-${DEBLOB_PV}"
+			DEBLOB_HOMEPAGE="https://www.fsfla.org/svn/fsfla/software/linux-libre/releases/tags/"
+			DEBLOB_URI_PATH="${DEBLOB_PV}${K_DEBLOB_TAG}"
+			DEBLOB_CHECK_URI="${DEBLOB_HOMEPAGE}/${DEBLOB_URI_PATH}/deblob-check -> ${DEBLOB_CHECK_A}"
+			DEBLOB_URI="${DEBLOB_HOMEPAGE}/${DEBLOB_URI_PATH}/${DEBLOB_A}"
+			HOMEPAGE="${HOMEPAGE} ${DEBLOB_HOMEPAGE}"
+
+			KERNEL_URI="${KERNEL_URI}
+				deblob? (
+					${DEBLOB_URI}
+					${DEBLOB_CHECK_URI}
+				)"
+		elif kernel_is lt 4 14; then
+			# Deblobbing is not available, so just mark kernels older
+			# than 4.14 as tainted with non-libre materials.
+			LICENSE+=" linux-firmware"
+		fi
+	fi
+
+elif [[ ${ETYPE} == headers ]]; then
+	DESCRIPTION="Linux system headers"
+	IUSE="headers-only"
+
+	# Since we should NOT honour KBUILD_OUTPUT in headers
+	# lets unset it here.
+	unset KBUILD_OUTPUT
+
+	SLOT="0"
+fi
+
+# Cross-compile support functions
+
+# @FUNCTION: kernel_header_destdir
+# @USAGE:
+# @DESCRIPTION:
+# return header destination directory
+kernel_header_destdir() {
+	[[ ${CTARGET} == ${CHOST} ]] \
+		&& echo /usr/include \
+		|| echo /usr/${CTARGET}/usr/include
+}
+
+# @FUNCTION: cross_pre_c_headers
+# @USAGE:
+# @DESCRIPTION:
+# set use if necessary for cross compile support
+cross_pre_c_headers() {
+	use headers-only && [[ ${CHOST} != ${CTARGET} ]]
+}
+
+# @FUNCTION: env_setup_xmakeopts
+# @USAGE:
+# @DESCRIPTION:
+# set the ARCH/CROSS_COMPILE when cross compiling
+
+env_setup_xmakeopts() {
+	# Kernel ARCH != portage ARCH
+	export KARCH=$(tc-arch-kernel)
+
+	# When cross-compiling, we need to set the ARCH/CROSS_COMPILE
+	# variables properly or bad things happen !
+	xmakeopts="ARCH=${KARCH}"
+	if [[ ${CTARGET} != ${CHOST} ]] && ! cross_pre_c_headers ; then
+		xmakeopts="${xmakeopts} CROSS_COMPILE=${CTARGET}-"
+	elif type -p ${CHOST}-ar > /dev/null ; then
+		xmakeopts="${xmakeopts} CROSS_COMPILE=${CHOST}-"
+	fi
+	export xmakeopts
+}
+
+# @FUNCTION: unpack_2_4
+# @USAGE:
+# @DESCRIPTION:
+# unpack and generate .config for 2.4 kernels
+
+unpack_2_4() {
+	# this file is required for other things to build properly,
+	# so we autogenerate it
+	make -s mrproper ${xmakeopts} || die "make mrproper failed"
+	make -s symlinks ${xmakeopts} || die "make symlinks failed"
+	make -s include/linux/version.h ${xmakeopts} || die "make include/linux/version.h failed"
+	echo ">>> version.h compiled successfully."
+}
+
+# @FUNCTION: unpack_2_6
+# @USAGE:
+# @DESCRIPTION:
+# unpack and generate .config for 2.6 kernels
+
+unpack_2_6() {
+	# this file is required for other things to build properly, so we
+	# autogenerate it ... generate a .config to keep version.h build from
+	# spitting out an annoying warning
+	make -s mrproper ${xmakeopts} 2>/dev/null \
+		|| die "make mrproper failed"
+
+	# quick fix for bug #132152 which triggers when it cannot include linux
+	# headers (ie, we have not installed it yet)
+	if ! make -s defconfig ${xmakeopts} &>/dev/null 2>&1 ; then
+		touch .config
+		eerror "make defconfig failed."
+		eerror "assuming you dont have any headers installed yet and continuing"
+	fi
+
+	make -s include/linux/version.h ${xmakeopts} 2>/dev/null \
+		|| die "make include/linux/version.h failed"
+	rm -f .config >/dev/null
+}
+
+# @FUNCTION: universal_unpack
+# @USAGE:
+# @DESCRIPTION:
+# unpack kernel sources
+
+universal_unpack() {
+	debug-print "Inside universal_unpack"
+
+	local OKV_ARRAY
+	IFS="." read -r -a OKV_ARRAY <<<"${OKV}"
+
+	cd "${WORKDIR}"
+	if [[ ${#OKV_ARRAY[@]} -ge 3 ]] && [[ ${KV_MAJOR} -ge 3 ]]; then
+		unpack linux-${KV_MAJOR}.${KV_MINOR}.tar.xz
+	else
+		unpack linux-${OKV}.tar.xz
+	fi
+
+	if [[ -d "linux" ]]; then
+		debug-print "Moving linux to linux-${KV_FULL}"
+		mv linux linux-${KV_FULL} \
+			|| die "Unable to move source tree to ${KV_FULL}."
+	elif [[ "${OKV}" != "${KV_FULL}" ]]; then
+		if [[ ${#OKV_ARRAY[@]} -ge 3 ]] && [[ ${KV_MAJOR} -ge 3 ]] &&
+			[[ "${ETYPE}" = "sources" ]]; then
+			debug-print "moving linux-${KV_MAJOR}.${KV_MINOR} to linux-${KV_FULL} "
+			mv linux-${KV_MAJOR}.${KV_MINOR} linux-${KV_FULL} \
+				|| die "Unable to move source tree to ${KV_FULL}."
+		else
+			debug-print "moving linux-${OKV} to linux-${KV_FULL} "
+			mv linux-${OKV} linux-${KV_FULL} \
+				|| die "Unable to move source tree to ${KV_FULL}."
+		fi
+	elif [[ ${#OKV_ARRAY[@]} -ge 3 ]] && [[ ${KV_MAJOR} -ge 3 ]]; then
+		mv linux-${KV_MAJOR}.${KV_MINOR} linux-${KV_FULL} \
+			|| die "Unable to move source tree to ${KV_FULL}."
+	fi
+	cd "${S}"
+
+	# remove all backup files
+	find . -iname "*~" -exec rm {} \; 2> /dev/null
+
+}
+
+# @FUNCTION: unpack_set_extraversion
+# @USAGE:
+# @DESCRIPTION:
+# handle EXTRAVERSION
+
+unpack_set_extraversion() {
+	cd "${S}"
+	sed -i -e "s:^\(EXTRAVERSION =\).*:\1 ${EXTRAVERSION}:" Makefile
+	cd "${OLDPWD}"
+}
+
+# @FUNCTION: unpack_fix_install_path
+# @USAGE:
+# @DESCRIPTION:
+# Should be done after patches have been applied
+# Otherwise patches that modify the same area of Makefile will fail
+
+unpack_fix_install_path() {
+	cd "${S}"
+	sed	-i -e 's:#export\tINSTALL_PATH:export\tINSTALL_PATH:' Makefile
+}
+
+# Compile Functions
+
+# @FUNCTION: compile_headers
+# @USAGE:
+# @DESCRIPTION:
+# header compilation
+
+compile_headers() {
+	env_setup_xmakeopts
+
+	# if we couldnt obtain HOSTCFLAGS from the Makefile,
+	# then set it to something sane
+	local HOSTCFLAGS=$(getfilevar HOSTCFLAGS "${S}"/Makefile)
+	HOSTCFLAGS=${HOSTCFLAGS:--Wall -Wstrict-prototypes -O2 -fomit-frame-pointer}
+
+	if kernel_is 2 4; then
+		yes "" | make oldconfig ${xmakeopts}
+		echo ">>> make oldconfig complete"
+		make dep ${xmakeopts}
+	elif kernel_is 2 6; then
+		# 2.6.18 introduces headers_install which means we dont need any
+		# of this crap anymore :D
+		kernel_is ge 2 6 18 && return 0
+
+		# autoconf.h isnt generated unless it already exists. plus, we have
+		# no guarantee that any headers are installed on the system...
+		[[ -f ${EROOT}usr/include/linux/autoconf.h ]] \
+			|| touch include/linux/autoconf.h
+
+		# if K_DEFCONFIG isn't set, force to "defconfig"
+		# needed by mips
+		if [[ -z ${K_DEFCONFIG} ]]; then
+			if kernel_is ge 2 6 16 ; then
+				case ${CTARGET} in
+					powerpc64*)	K_DEFCONFIG="ppc64_defconfig";;
+					powerpc*)	K_DEFCONFIG="pmac32_defconfig";;
+					*)			K_DEFCONFIG="defconfig";;
+				esac
+			else
+				K_DEFCONFIG="defconfig"
+			fi
+		fi
+
+		# if there arent any installed headers, then there also isnt an asm
+		# symlink in /usr/include/, and make defconfig will fail, so we have
+		# to force an include path with $S.
+		HOSTCFLAGS="${HOSTCFLAGS} -I${S}/include/"
+		ln -sf asm-${KARCH} "${S}"/include/asm || die
+		cross_pre_c_headers && return 0
+
+		make ${K_DEFCONFIG} HOSTCFLAGS="${HOSTCFLAGS}" ${xmakeopts} || die "defconfig failed (${K_DEFCONFIG})"
+		if compile_headers_tweak_config ; then
+			yes "" | make oldconfig HOSTCFLAGS="${HOSTCFLAGS}" ${xmakeopts} || die "2nd oldconfig failed"
+		fi
+		make prepare HOSTCFLAGS="${HOSTCFLAGS}" ${xmakeopts} || die "prepare failed"
+		make prepare-all HOSTCFLAGS="${HOSTCFLAGS}" ${xmakeopts} || die "prepare failed"
+	fi
+}
+
+# @FUNCTION: compile_headers_tweak_config
+# @USAGE:
+# @DESCRIPTION:
+# some targets can be very very picky, so let's finesse the
+# .config based upon any info we may have
+
+compile_headers_tweak_config() {
+	case ${CTARGET} in
+	sh*)
+		sed -i '/CONFIG_CPU_SH/d' .config || die
+		echo "CONFIG_CPU_SH${CTARGET:2:1}=y" >> .config
+		return 0;;
+	esac
+
+	# no changes, so lets do nothing
+	return 1
+}
+
+# install functions
+
+# @FUNCTION: install_universal
+# @USAGE:
+# @DESCRIPTION:
+# Fix permissions in tarball
+
+install_universal() {
+	cd "${WORKDIR}"
+	chown -R 0:0 * >& /dev/null
+	chmod -R a+r-w+X,u+w *
+	cd ${OLDPWD}
+}
+
+# @FUNCTION: install_headers
+# @USAGE:
+# @DESCRIPTION:
+# Install headers
+
+install_headers() {
+	local ddir=$(kernel_header_destdir)
+
+	# 2.6.18 introduces headers_install which means we dont need any
+	# of this crap anymore :D
+	if kernel_is ge 2 6 18 ; then
+		env_setup_xmakeopts
+		emake headers_install INSTALL_HDR_PATH="${ED}"${ddir}/.. ${xmakeopts} || die
+
+		# let other packages install some of these headers
+		rm -rf "${ED}"${ddir}/scsi || die #glibc/uclibc/etc...
+		return 0
+	fi
+
+	# Do not use "linux/*" as that can cause problems with very long
+	# $S values where the cmdline to cp is too long
+	pushd "${S}" >/dev/null
+	dodir ${ddir}/linux
+	cp -pPR "${S}"/include/linux "${ED}"${ddir}/ || die
+	rm -rf "${ED}"${ddir}/linux/modules || die
+
+	dodir ${ddir}/asm
+	cp -pPR "${S}"/include/asm/* "${ED}"${ddir}/asm || die
+
+	if kernel_is 2 6 ; then
+		dodir ${ddir}/asm-generic
+		cp -pPR "${S}"/include/asm-generic/* "${ED}"${ddir}/asm-generic || die
+	fi
+
+	# clean up
+	find "${D}" -name '*.orig' -exec rm -f {} \;
+
+	popd >/dev/null
+}
+
+# @FUNCTION: install_sources
+# @USAGE:
+# @DESCRIPTION:
+# Install sources
+
+install_sources() {
+	local file
+
+	cd "${S}"
+	dodir /usr/src
+	echo ">>> Copying sources ..."
+
+	file="$(find ${WORKDIR} -iname "docs" -type d)"
+	if [[ -n ${file} ]]; then
+		for file in $(find ${file} -type f); do
+			echo "${file//*docs\/}" >> "${S}"/patches.txt
+			echo "===================================================" >> "${S}"/patches.txt
+			cat ${file} >> "${S}"/patches.txt
+			echo "===================================================" >> "${S}"/patches.txt
+			echo "" >> "${S}"/patches.txt
+		done
+	fi
+
+	mv "${WORKDIR}"/linux* "${ED}"usr/src || die
+
+	if [[ -n "${UNIPATCH_DOCS}" ]] ; then
+		for i in ${UNIPATCH_DOCS}; do
+			dodoc "${T}"/${i}
+		done
+	fi
+}
+
+# @FUNCTION: preinst_headers
+# @USAGE:
+# @DESCRIPTION:
+# Headers preinst steps
+
+preinst_headers() {
+	local ddir=$(kernel_header_destdir)
+	[[ -L ${EPREFIX}${ddir}/linux ]] && { rm "${EPREFIX}"${ddir}/linux || die; }
+	[[ -L ${EPREFIX}${ddir}/asm ]] && { rm "${EPREFIX}"${ddir}/asm || die; }
+}
+
+# @FUNCTION: postinst_sources
+# @USAGE:
+# @DESCRIPTION:
+# Sources post installation function.
+# see inline comments
+
+postinst_sources() {
+	local MAKELINK=0
+
+	# if we have USE=symlink, then force K_SYMLINK=1
+	use symlink && K_SYMLINK=1
+
+	# We do support security on a deblobbed kernel, bug #555878.
+	# If some particular kernel version doesn't have security
+	# supported because of USE=deblob or otherwise, one can still
+	# set K_SECURITY_UNSUPPORTED on a per ebuild basis.
+	#[[ $K_DEBLOB_AVAILABLE == 1 ]] && \
+	#	use deblob && \
+	#	K_SECURITY_UNSUPPORTED=deblob
+
+	# if we are to forcably symlink, delete it if it already exists first.
+	if [[ ${K_SYMLINK} > 0 ]]; then
+		[[ -h ${EROOT}usr/src/linux ]] && { rm "${EROOT}"usr/src/linux || die; }
+		MAKELINK=1
+	fi
+
+	# if the link doesnt exist, lets create it
+	[[ ! -h ${EROOT}usr/src/linux ]] && MAKELINK=1
+
+	if [[ ${MAKELINK} == 1 ]]; then
+		ln -sf linux-${KV_FULL} "${EROOT}"usr/src/linux || die
+	fi
+
+	# Don't forget to make directory for sysfs
+	[[ ! -d ${EROOT}sys ]] && kernel_is 2 6 && { mkdir "${EROOT}"sys || die ; }
+
+	echo
+	elog "If you are upgrading from a previous kernel, you may be interested"
+	elog "in the following document:"
+	elog "  - General upgrade guide: https://wiki.gentoo.org/wiki/Kernel/Upgrade"
+	echo
+
+	# if K_EXTRAEINFO is set then lets display it now
+	if [[ -n ${K_EXTRAEINFO} ]]; then
+		echo ${K_EXTRAEINFO} | fmt |
+		while read -s ELINE; do	einfo "${ELINE}"; done
+	fi
+
+	# if K_EXTRAELOG is set then lets display it now
+	if [[ -n ${K_EXTRAELOG} ]]; then
+		echo ${K_EXTRAELOG} | fmt |
+		while read -s ELINE; do	elog "${ELINE}"; done
+	fi
+
+	# if K_EXTRAEWARN is set then lets display it now
+	if [[ -n ${K_EXTRAEWARN} ]]; then
+		echo ${K_EXTRAEWARN} | fmt |
+		while read -s ELINE; do ewarn "${ELINE}"; done
+	fi
+
+	# optionally display security unsupported message
+	#  Start with why
+	if [[ -n ${K_SECURITY_UNSUPPORTED} ]]; then
+		ewarn "${PN} is UNSUPPORTED by Gentoo Security."
+	fi
+	#  And now the general message.
+	if [[ -n ${K_SECURITY_UNSUPPORTED} ]]; then
+		ewarn "This means that it is likely to be vulnerable to recent security issues."
+		echo
+		ewarn "Upstream kernel developers recommend always running the latest "
+		ewarn "release of any current long term supported Linux kernel version."
+		ewarn "To see a list of these versions, their most current release and "
+		ewarn "long term support status, please go to https://www.kernel.org ."
+		echo
+		ewarn "For specific information on why this kernel is unsupported, please read:"
+		ewarn "https://wiki.gentoo.org/wiki/Project:Kernel_Security"
+	fi
+
+	# warn sparc users that they need to do cross-compiling with >= 2.6.25(bug #214765)
+	KV_MAJOR=$(ver_cut 1 ${OKV})
+	KV_MINOR=$(ver_cut 2 ${OKV})
+	KV_PATCH=$(ver_cut 3 ${OKV})
+	if [[ "$(tc-arch)" = "sparc" ]]; then
+		if [[ $(gcc-major-version) -lt 4 && $(gcc-minor-version) -lt 4 ]]; then
+			if [[ ${KV_MAJOR} -ge 3 || ${KV_MAJOR}.${KV_MINOR}.${KV_PATCH} > 2.6.24 ]] ; then
+				echo
+				elog "NOTE: Since 2.6.25 the kernel Makefile has changed in a way that"
+				elog "you now need to do"
+				elog "  make CROSS_COMPILE=sparc64-unknown-linux-gnu-"
+				elog "instead of just"
+				elog "  make"
+				elog "to compile the kernel. For more information please browse to"
+				elog "https://bugs.gentoo.org/show_bug.cgi?id=214765"
+				echo
+			fi
+		fi
+	fi
+}
+
+# pkg_setup functions
+
+# @FUNCTION: setup_headers
+# @USAGE:
+# @DESCRIPTION:
+# Determine if ${PN} supports arch
+
+setup_headers() {
+	[[ -z ${H_SUPPORTEDARCH} ]] && H_SUPPORTEDARCH=${PN/-*/}
+	for i in ${H_SUPPORTEDARCH}; do
+		[[ $(tc-arch) == "${i}" ]] && H_ACCEPT_ARCH="yes"
+	done
+
+	if [[ ${H_ACCEPT_ARCH} != "yes" ]]; then
+		echo
+		eerror "This version of ${PN} does not support $(tc-arch)."
+		eerror "Please merge the appropriate sources, in most cases"
+		eerror "(but not all) this will be called $(tc-arch)-headers."
+		die "Package unsupported for $(tc-arch)"
+	fi
+}
+
+# @FUNCTION: unipatch
+# @USAGE: <list of patches to apply>
+# @DESCRIPTION:
+# Universal function that will apply patches to source
+
+unipatch() {
+	local i x y z extention PIPE_CMD UNIPATCH_DROP KPATCH_DIR PATCH_DEPTH ELINE
+	local STRICT_COUNT PATCH_LEVEL myLC_ALL myLANG
+
+	# set to a standard locale to ensure sorts are ordered properly.
+	myLC_ALL="${LC_ALL}"
+	myLANG="${LANG}"
+	LC_ALL="C"
+	LANG=""
+
+	[ -z "${KPATCH_DIR}" ] && KPATCH_DIR="${WORKDIR}/patches/"
+	[ ! -d ${KPATCH_DIR} ] && mkdir -p ${KPATCH_DIR}
+
+	# We're gonna need it when doing patches with a predefined patchlevel
+	eshopts_push -s extglob
+
+	# This function will unpack all passed tarballs, add any passed patches,
+	# and remove any passed patchnumbers
+	# usage can be either via an env var or by params
+	# although due to the nature we pass this within this eclass
+	# it shall be by param only.
+	# -z "${UNIPATCH_LIST}" ] && UNIPATCH_LIST="${@}"
+	UNIPATCH_LIST="${@}"
+
+	#unpack any passed tarballs
+	for i in ${UNIPATCH_LIST}; do
+		if echo ${i} | grep -qs -e "\.tar" -e "\.tbz" -e "\.tgz" ; then
+			if [ -n "${UNIPATCH_STRICTORDER}" ]; then
+				unset z
+				STRICT_COUNT=$((10#${STRICT_COUNT} + 1))
+				for((y=0; y<$((6 - ${#STRICT_COUNT})); y++));
+					do z="${z}0";
+				done
+				PATCH_ORDER="${z}${STRICT_COUNT}"
+
+				mkdir -p "${KPATCH_DIR}/${PATCH_ORDER}"
+				pushd "${KPATCH_DIR}/${PATCH_ORDER}" >/dev/null
+				unpack ${i##*/}
+				popd >/dev/null
+			else
+				pushd "${KPATCH_DIR}" >/dev/null
+				unpack ${i##*/}
+				popd >/dev/null
+			fi
+
+			[[ ${i} == *:* ]] && echo ">>> Strict patch levels not currently supported for tarballed patchsets"
+		else
+			extention=${i/*./}
+			extention=${extention/:*/}
+			PIPE_CMD=""
+			case ${extention} in
+				     xz) PIPE_CMD="xz -dc";;
+				   lzma) PIPE_CMD="lzma -dc";;
+				    bz2) PIPE_CMD="bzip2 -dc";;
+				 patch*) PIPE_CMD="cat";;
+				   diff) PIPE_CMD="cat";;
+				 gz|Z|z) PIPE_CMD="gzip -dc";;
+				ZIP|zip) PIPE_CMD="unzip -p";;
+				      *) UNIPATCH_DROP="${UNIPATCH_DROP} ${i/:*/}";;
+			esac
+
+			PATCH_LEVEL=${i/*([^:])?(:)}
+			i=${i/:*/}
+			x=${i/*\//}
+			x=${x/\.${extention}/}
+
+			if [ -n "${PIPE_CMD}" ]; then
+				if [ ! -r "${i}" ]; then
+					echo
+					eerror "FATAL: unable to locate:"
+					eerror "${i}"
+					eerror "for read-only. The file either has incorrect permissions"
+					eerror "or does not exist."
+					die Unable to locate ${i}
+				fi
+
+				if [ -n "${UNIPATCH_STRICTORDER}" ]; then
+					unset z
+					STRICT_COUNT=$((10#${STRICT_COUNT} + 1))
+					for((y=0; y<$((6 - ${#STRICT_COUNT})); y++));
+						do z="${z}0";
+					done
+					PATCH_ORDER="${z}${STRICT_COUNT}"
+
+					mkdir -p ${KPATCH_DIR}/${PATCH_ORDER}/
+					$(${PIPE_CMD} ${i} > ${KPATCH_DIR}/${PATCH_ORDER}/${x}.patch${PATCH_LEVEL}) || die "uncompressing patch failed"
+				else
+					$(${PIPE_CMD} ${i} > ${KPATCH_DIR}/${x}.patch${PATCH_LEVEL}) || die "uncompressing patch failed"
+				fi
+			fi
+		fi
+
+		# If experimental was not chosen by the user, drop experimental patches not in K_EXP_GENPATCHES_LIST.
+		if [[ "${i}" == *"genpatches-"*".experimental."* && -n ${K_EXP_GENPATCHES_PULL} ]] ; then
+			if [[ -z ${K_EXP_GENPATCHES_NOUSE} ]] && use experimental; then
+				continue
+			fi
+
+			local j
+			for j in ${KPATCH_DIR}/*/50*_*.patch*; do
+				for k in ${K_EXP_GENPATCHES_LIST} ; do
+					[[ "$(basename ${j})" == ${k}* ]] && continue 2
+				done
+				UNIPATCH_DROP+=" $(basename ${j})"
+			done
+		else
+			UNIPATCH_LIST_GENPATCHES+=" ${DISTDIR}/${tarball}"
+			debug-print "genpatches tarball: $tarball"
+
+			local GCC_MAJOR_VER=$(gcc-major-version)
+			local GCC_MINOR_VER=$(gcc-minor-version)
+
+			# optimization patch for gcc < 8.X and kernel > 4.13
+			if kernel_is ge 4 13 ; then 
+				if [[ ${GCC_MAJOR_VER} -lt 8 ]] && [[ ${GCC_MAJOR_VER} -gt 4 ]]; then
+					UNIPATCH_DROP+=" 5011_enable-cpu-optimizations-for-gcc8.patch"
+					UNIPATCH_DROP+=" 5012_enable-cpu-optimizations-for-gcc91.patch"
+				# optimization patch for gcc >= 8 and kernel ge 4.13
+				elif [[ "${GCC_MAJOR_VER}" -eq 8 ]]; then
+					# support old kernels for a period. For now, remove as all gcc versions required are masked
+					UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc.patch"
+					UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc-4.9.patch"
+					UNIPATCH_DROP+=" 5012_enable-cpu-optimizations-for-gcc91.patch"
+				elif [[ "${GCC_MAJOR_VER}" -eq 9 ]] && [[ ${GCC_MINOR_VER} -ge 1 ]]; then
+					UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc.patch"
+					UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc-4.9.patch"
+					UNIPATCH_DROP+=" 5011_enable-cpu-optimizations-for-gcc8.patch"
+				else
+					UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc.patch"
+					UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc-4.9.patch"
+					UNIPATCH_DROP+=" 5011_enable-cpu-optimizations-for-gcc8.patch"
+					UNIPATCH_DROP+=" 5012_enable-cpu-optimizations-for-gcc91.patch"
+				fi
+			else
+				UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc.patch"
+				UNIPATCH_DROP+=" 5010_enable-additional-cpu-optimizations-for-gcc-4.9.patch"
+				UNIPATCH_DROP+=" 5011_enable-cpu-optimizations-for-gcc8.patch"
+				UNIPATCH_DROP+=" 5012_enable-cpu-optimizations-for-gcc91.patch"
+			fi
+		fi
+	done
+
+	#populate KPATCH_DIRS so we know where to look to remove the excludes
+	x=${KPATCH_DIR}
+	KPATCH_DIR=""
+	for i in $(find ${x} -type d | sort -n); do
+		KPATCH_DIR="${KPATCH_DIR} ${i}"
+	done
+
+	# do not apply fbcondecor patch to sparc/sparc64 as it breaks boot
+	# bug #272676
+	if [[ "$(tc-arch)" = "sparc" || "$(tc-arch)" = "sparc64" ]]; then
+		if [[ ${KV_MAJOR} -ge 3 || ${KV_MAJOR}.${KV_MINOR}.${KV_PATCH} > 2.6.28 ]]; then
+			if [[ ! -z ${K_WANT_GENPATCHES} ]] ; then
+				UNIPATCH_DROP="${UNIPATCH_DROP} *_fbcondecor*.patch"
+				echo
+				ewarn "fbcondecor currently prevents sparc/sparc64 from booting"
+				ewarn "for kernel versions >= 2.6.29. Removing fbcondecor patch."
+				ewarn "See https://bugs.gentoo.org/show_bug.cgi?id=272676 for details"
+				echo
+			fi
+		fi
+	fi
+
+	#so now lets get rid of the patchno's we want to exclude
+	UNIPATCH_DROP="${UNIPATCH_EXCLUDE} ${UNIPATCH_DROP}"
+	for i in ${UNIPATCH_DROP}; do
+		ebegin "Excluding Patch #${i}"
+		for x in ${KPATCH_DIR}; do rm -f ${x}/${i}* 2>/dev/null; done
+		eend $?
+	done
+
+	# and now, finally, we patch it :)
+	for x in ${KPATCH_DIR}; do
+		for i in $(find ${x} -maxdepth 1 -iname "*.patch*" -or -iname "*.diff*" | sort -n); do
+			STDERR_T="${T}/${i/*\//}"
+			STDERR_T="${STDERR_T/.patch*/.err}"
+
+			[ -z ${i/*.patch*/} ] && PATCH_DEPTH=${i/*.patch/}
+			#[ -z ${i/*.diff*/} ]  && PATCH_DEPTH=${i/*.diff/}
+
+			if [ -z "${PATCH_DEPTH}" ]; then PATCH_DEPTH=0; fi
+
+			####################################################################
+			# IMPORTANT: This is temporary code to support Linux git 3.15_rc1! #
+			#                                                                  #
+			# The patch contains a removal of a symlink, followed by addition  #
+			# of a file with the same name as the symlink in the same          #
+			# location; this causes the dry-run to fail, filed bug #507656.    #
+			#                                                                  #
+			# https://bugs.gentoo.org/show_bug.cgi?id=507656                   #
+			####################################################################
+			if [[ -n ${K_FROM_GIT} ]] ; then
+				if [[ ${KV_MAJOR} -gt 3 || ( ${KV_MAJOR} -eq 3 && ${KV_PATCH} -gt 15 ) &&
+					${RELEASETYPE} == -rc ]] ; then
+					ebegin "Applying ${i/*\//} (-p1)"
+					if [ $(patch -p1 --no-backup-if-mismatch -f < ${i} >> ${STDERR_T}) "$?" -le 2 ]; then
+						eend 0
+						rm ${STDERR_T} || die
+						break
+					else
+						eend 1
+						eerror "Failed to apply patch ${i/*\//}"
+						eerror "Please attach ${STDERR_T} to any bug you may post."
+						eshopts_pop
+						die "Failed to apply ${i/*\//} on patch depth 1."
+					fi
+				fi
+			fi
+			####################################################################
+
+			while [ ${PATCH_DEPTH} -lt 5 ]; do
+				echo "Attempting Dry-run:" >> ${STDERR_T}
+				echo "cmd: patch -p${PATCH_DEPTH} --no-backup-if-mismatch --dry-run -f < ${i}" >> ${STDERR_T}
+				echo "=======================================================" >> ${STDERR_T}
+				if [ $(patch -p${PATCH_DEPTH} --no-backup-if-mismatch --dry-run -f < ${i} >> ${STDERR_T}) $? -eq 0 ]; then
+					ebegin "Applying ${i/*\//} (-p${PATCH_DEPTH})"
+					echo "Attempting patch:" > ${STDERR_T}
+					echo "cmd: patch -p${PATCH_DEPTH} --no-backup-if-mismatch -f < ${i}" >> ${STDERR_T}
+					echo "=======================================================" >> ${STDERR_T}
+					if [ $(patch -p${PATCH_DEPTH} --no-backup-if-mismatch -f < ${i} >> ${STDERR_T}) "$?" -eq 0 ]; then
+						eend 0
+						rm ${STDERR_T} || die
+						break
+					else
+						eend 1
+						eerror "Failed to apply patch ${i/*\//}"
+						eerror "Please attach ${STDERR_T} to any bug you may post."
+						eshopts_pop
+						die "Failed to apply ${i/*\//} on patch depth ${PATCH_DEPTH}."
+					fi
+				else
+					PATCH_DEPTH=$((${PATCH_DEPTH} + 1))
+				fi
+			done
+			if [ ${PATCH_DEPTH} -eq 5 ]; then
+				eerror "Failed to dry-run patch ${i/*\//}"
+				eerror "Please attach ${STDERR_T} to any bug you may post."
+				eshopts_pop
+				die "Unable to dry-run patch on any patch depth lower than 5."
+			fi
+		done
+	done
+
+	# When genpatches is used, we want to install 0000_README which documents
+	# the patches that were used; such that the user can see them, bug #301478.
+	if [[ ! -z ${K_WANT_GENPATCHES} ]] ; then
+		UNIPATCH_DOCS="${UNIPATCH_DOCS} 0000_README"
+	fi
+
+	# When files listed in UNIPATCH_DOCS are found in KPATCH_DIR's, we copy it
+	# to the temporary directory and remember them in UNIPATCH_DOCS to install
+	# them during the install phase.
+	local tmp
+	for x in ${KPATCH_DIR}; do
+		for i in ${UNIPATCH_DOCS}; do
+			if [[ -f ${x}/${i} ]] ; then
+				tmp="${tmp} ${i}"
+				cp -f "${x}/${i}" "${T}"/ || die
+			fi
+		done
+	done
+	UNIPATCH_DOCS="${tmp}"
+
+	# clean up  KPATCH_DIR's - fixes bug #53610
+	for x in ${KPATCH_DIR}; do rm -Rf ${x}; done
+
+	LC_ALL="${myLC_ALL}"
+	LANG="${myLANG}"
+	eshopts_pop
+}
+
+# @FUNCTION: getfilevar
+# @USAGE: <variable> <configfile>
+# @DESCRIPTION:
+# pulled from linux-info
+
+getfilevar() {
+	local workingdir basefname basedname xarch=$(tc-arch-kernel)
+
+	if [[ -z ${1} ]] && [[ ! -f ${2} ]]; then
+		echo -e "\n"
+		eerror "getfilevar requires 2 variables, with the second a valid file."
+		eerror "   getfilevar <VARIABLE> <CONFIGFILE>"
+	else
+		workingdir=${PWD}
+		basefname=$(basename ${2})
+		basedname=$(dirname ${2})
+		unset ARCH
+
+		cd ${basedname}
+		echo -e "include ${basefname}\ne:\n\t@echo \$(${1})" | \
+			make ${BUILD_FIXES} -s -f - e 2>/dev/null
+		cd ${workingdir}
+
+		ARCH=${xarch}
+	fi
+}
+
+# @FUNCTION: detect_arch
+# @USAGE:
+# @DESCRIPTION:
+# This function sets ARCH_URI and ARCH_PATCH
+# with the neccessary info for the arch sepecific compatibility
+# patchsets.
+
+detect_arch() {
+
+	local ALL_ARCH LOOP_ARCH LOOP_ARCH_L COMPAT_URI i TC_ARCH_KERNEL
+
+	# COMPAT_URI is the contents of ${ARCH}_URI
+	# ARCH_URI is the URI for all the ${ARCH}_URI patches
+	# ARCH_PATCH is ARCH_URI broken into files for UNIPATCH
+
+	ARCH_URI=""
+	ARCH_PATCH=""
+	TC_ARCH_KERNEL=""
+	ALL_ARCH="ALPHA AMD64 ARM HPPA IA64 M68K MIPS PPC PPC64 S390 SH SPARC X86"
+
+	for LOOP_ARCH in ${ALL_ARCH}; do
+		COMPAT_URI="${LOOP_ARCH}_URI"
+		COMPAT_URI="${!COMPAT_URI}"
+
+		declare -l LOOP_ARCH_L=${LOOP_ARCH}
+
+		[[ -n ${COMPAT_URI} ]] && \
+			ARCH_URI="${ARCH_URI} ${LOOP_ARCH_L}? ( ${COMPAT_URI} )"
+
+		declare -u TC_ARCH_KERNEL=$(tc-arch-kernel)
+		if [[ ${LOOP_ARCH} == ${TC_ARCH_KERNEL} ]]; then
+			for i in ${COMPAT_URI}; do
+				ARCH_PATCH="${ARCH_PATCH} ${DISTDIR}/${i/*\//}"
+			done
+		fi
+
+	done
+}
+
+# @FUNCTION: headers___fix
+# @USAGE:
+# @DESCRIPTION:
+# Voodoo to partially fix broken upstream headers.
+# note: do not put inline/asm/volatile together (breaks "inline asm volatile")
+
+headers___fix() {
+	sed -i \
+		-e '/^\#define.*_TYPES_H/{:loop n; bloop}' \
+		-e 's:\<\([us]\(8\|16\|32\|64\)\)\>:__\1:g' \
+		-e "s/\([[:space:]]\)inline\([[:space:](]\)/\1__inline__\2/g" \
+		-e "s/\([[:space:]]\)asm\([[:space:](]\)/\1__asm__\2/g" \
+		-e "s/\([[:space:]]\)volatile\([[:space:](]\)/\1__volatile__\2/g" \
+		"$@"
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_src_unpack
+# @USAGE:
+# @DESCRIPTION:
+# unpack sources, handle genpatches, deblob
+
+kernel-2-src-prepare-overlay_src_unpack() {
+	universal_unpack
+	debug-print "Doing unipatch"
+
+	# request UNIPATCH_LIST_GENPATCHES in phase since it calls 'use'
+	handle_genpatches --set-unipatch-list
+	[[ -n ${UNIPATCH_LIST} || -n ${UNIPATCH_LIST_DEFAULT} || -n ${UNIPATCH_LIST_GENPATCHES} ]] && \
+		unipatch "${UNIPATCH_LIST_DEFAULT} ${UNIPATCH_LIST_GENPATCHES} ${UNIPATCH_LIST}"
+
+	debug-print "Doing premake"
+
+	# allow ebuilds to massage the source tree after patching but before
+	# we run misc `make` functions below
+	[[ $(type -t kernel-2-src-prepare-overlay_hook_premake) == "function" ]] && kernel-2-src-prepare-overlay_hook_premake
+
+	debug-print "Doing unpack_set_extraversion"
+
+	[[ -z ${K_NOSETEXTRAVERSION} ]] && unpack_set_extraversion
+	unpack_fix_install_path
+
+	# Setup xmakeopts and cd into sourcetree.
+	env_setup_xmakeopts
+	cd "${S}"
+
+	# We dont need a version.h for anything other than headers
+	# at least, I should hope we dont. If this causes problems
+	# take out the if/fi block and inform me please.
+	# unpack_2_6 should now be 2.6.17 safe anyways
+	if [[ ${ETYPE} == headers ]]; then
+		kernel_is 2 4 && unpack_2_4
+		kernel_is 2 6 && unpack_2_6
+	fi
+
+	if [[ $K_DEBLOB_AVAILABLE == 1 ]] && use deblob ; then
+		cp "${DISTDIR}/${DEBLOB_A}" "${T}" || die "cp ${DEBLOB_A} failed"
+		cp "${DISTDIR}/${DEBLOB_CHECK_A}" "${T}/deblob-check" || die "cp ${DEBLOB_CHECK_A} failed"
+		chmod +x "${T}/${DEBLOB_A}" "${T}/deblob-check" || die "chmod deblob scripts failed"
+	fi
+
+	# fix a problem on ppc where TOUT writes to /usr/src/linux breaking sandbox
+	# only do this for kernel < 2.6.27 since this file does not exist in later
+	# kernels
+	if [[ -n ${KV_MINOR} &&  ${KV_MAJOR}.${KV_MINOR}.${KV_PATCH} < 2.6.27 ]] ; then
+		sed -i \
+			-e 's|TOUT      := .tmp_gas_check|TOUT  := $(T).tmp_gas_check|' \
+			"${S}"/arch/ppc/Makefile
+	else
+		sed -i \
+			-e 's|TOUT      := .tmp_gas_check|TOUT  := $(T).tmp_gas_check|' \
+			"${S}"/arch/powerpc/Makefile
+	fi
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_src_prepare
+# @USAGE:
+# @DESCRIPTION:
+# Apply any user patches
+
+kernel-2-src-prepare-overlay_src_prepare() {
+
+	debug-print "Applying any user patches"
+
+	# apply any user patches
+	case ${EAPI:-0} in
+		0|1|2|3|4|5) epatch_user ;;
+		6) eapply_user ;;
+	esac
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_src_compile
+# @USAGE:
+# @DESCRIPTION:
+# conpile headers or run deblob script
+
+kernel-2-src-prepare-overlay_src_compile() {
+	cd "${S}"
+	[[ ${ETYPE} == headers ]] && compile_headers
+
+	if [[ $K_DEBLOB_AVAILABLE == 1 ]] && use deblob ; then
+		echo ">>> Running deblob script ..."
+		python_setup
+		sh "${T}/${DEBLOB_A}" --force || die "Deblob script failed to run!!!"
+	fi
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_src_test
+# @USAGE:
+# @DESCRIPTION:
+# if you leave it to the default src_test, it will run make to
+# find whether test/check targets are present; since "make test"
+# actually produces a few support files, they are installed even
+# though the package is binchecks-restricted.
+#
+# Avoid this altogether by making the function moot.
+kernel-2-src-prepare-overlay_src_test() { :; }
+
+# @FUNCTION: kernel-2-src-prepare-overlay_pkg_preinst
+# @DESCRIPTION:
+# if ETYPE = headers, call preinst_headers
+
+kernel-2-src-prepare-overlay_pkg_preinst() {
+	[[ ${ETYPE} == headers ]] && preinst_headers
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_src_install
+# @USAGE:
+# @DESCRIPTION:
+# Install headers or sources dependant on ETYPE
+
+kernel-2-src-prepare-overlay_src_install() {
+	install_universal
+	[[ ${ETYPE} == headers ]] && install_headers
+	[[ ${ETYPE} == sources ]] && install_sources
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_pkg_postinst
+# @USAGE:
+# @DESCRIPTION:
+# call postinst_sources for ETYPE = sources
+
+kernel-2-src-prepare-overlay_pkg_postinst() {
+	[[ ${ETYPE} == sources ]] && postinst_sources
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_pkg_setup
+# @USAGE:
+# @DESCRIPTION:
+# check for supported kernel version, die if ETYPE is unknown, call setup_headers
+# if necessary
+
+kernel-2-src-prepare-overlay_pkg_setup() {
+	if kernel_is 2 4; then
+		if [[ $(gcc-major-version) -ge 4 ]] ; then
+			echo
+			ewarn "Be warned !! >=sys-devel/gcc-4.0.0 isn't supported with linux-2.4!"
+			ewarn "Either switch to another gcc-version (via gcc-config) or use a"
+			ewarn "newer kernel that supports gcc-4."
+			echo
+			ewarn "Also be aware that bugreports about gcc-4 not working"
+			ewarn "with linux-2.4 based ebuilds will be closed as INVALID!"
+			echo
+		fi
+	fi
+
+	ABI="${KERNEL_ABI}"
+	if [[ ${ETYPE} != sources ]] && [[ ${ETYPE} != headers ]]; then
+		eerror "Unknown ETYPE=\"${ETYPE}\", must be \"sources\" or \"headers\""
+		die "Unknown ETYPE=\"${ETYPE}\", must be \"sources\" or \"headers\""
+	fi
+
+	[[ ${ETYPE} == headers ]] && setup_headers
+	[[ ${ETYPE} == sources ]] && echo ">>> Preparing to unpack ..."
+}
+
+# @FUNCTION: kernel-2-src-prepare-overlay_pkg_postrm
+# @USAGE:
+# @DESCRIPTION:
+# Notify the user that after a depclean, there may be sources
+# left behind that need to be manually cleaned
+
+kernel-2-src-prepare-overlay_pkg_postrm() {
+	# This warning only makes sense for kernel sources.
+	[[ ${ETYPE} == headers ]] && return 0
+
+	# If there isn't anything left behind, then don't complain.
+	[[ -e ${EROOT}usr/src/linux-${KV_FULL} ]] || return 0
+	echo
+	ewarn "Note: Even though you have successfully unmerged "
+	ewarn "your kernel package, directories in kernel source location: "
+	ewarn "${EROOT}usr/src/linux-${KV_FULL}"
+	ewarn "with modified files will remain behind. By design, package managers"
+	ewarn "will not remove these modified files and the directories they reside in."
+	echo
+	ewarn "For more detailed kernel removal instructions, please see: "
+	ewarn "https://wiki.gentoo.org/wiki/Kernel/Removal"
+	echo
+}
diff --git a/sys-kernel/ck-sources/ck-sources-5.4.35.ebuild b/sys-kernel/ck-sources/ck-sources-5.4.35.ebuild
index 2e59b98..3ba3b08 100644
--- a/sys-kernel/ck-sources/ck-sources-5.4.35.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.4.35.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="35"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.4.36.ebuild b/sys-kernel/ck-sources/ck-sources-5.4.36.ebuild
index 20278a3..b65f94b 100644
--- a/sys-kernel/ck-sources/ck-sources-5.4.36.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.4.36.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="36"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.4.37.ebuild b/sys-kernel/ck-sources/ck-sources-5.4.37.ebuild
index e7c3680..008ca7d 100644
--- a/sys-kernel/ck-sources/ck-sources-5.4.37.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.4.37.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="37"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.4.38.ebuild b/sys-kernel/ck-sources/ck-sources-5.4.38.ebuild
index 6b7b8b9..33ce3dc 100644
--- a/sys-kernel/ck-sources/ck-sources-5.4.38.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.4.38.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="38"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.4.39.ebuild b/sys-kernel/ck-sources/ck-sources-5.4.39.ebuild
index 91b3b88..85ac912 100644
--- a/sys-kernel/ck-sources/ck-sources-5.4.39.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.4.39.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="39"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.5.19.ebuild b/sys-kernel/ck-sources/ck-sources-5.5.19.ebuild
index aabe91c..b670c4e 100644
--- a/sys-kernel/ck-sources/ck-sources-5.5.19.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.5.19.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="21"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.6.10.ebuild b/sys-kernel/ck-sources/ck-sources-5.6.10.ebuild
index 332e1b0..a23d11e 100644
--- a/sys-kernel/ck-sources/ck-sources-5.6.10.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.6.10.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="13"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.6.11.ebuild b/sys-kernel/ck-sources/ck-sources-5.6.11.ebuild
index 107a32f..7d6e387 100644
--- a/sys-kernel/ck-sources/ck-sources-5.6.11.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.6.11.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="15"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.6.7.ebuild b/sys-kernel/ck-sources/ck-sources-5.6.7.ebuild
index bcf6450..fbed2f4 100644
--- a/sys-kernel/ck-sources/ck-sources-5.6.7.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.6.7.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="10"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.6.8.ebuild b/sys-kernel/ck-sources/ck-sources-5.6.8.ebuild
index bcf6450..fbed2f4 100644
--- a/sys-kernel/ck-sources/ck-sources-5.6.8.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.6.8.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="10"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/ck-sources/ck-sources-5.6.9.ebuild b/sys-kernel/ck-sources/ck-sources-5.6.9.ebuild
index aeb82cf..22de397 100644
--- a/sys-kernel/ck-sources/ck-sources-5.6.9.ebuild
+++ b/sys-kernel/ck-sources/ck-sources-5.6.9.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="12"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/liquorix-sources/liquorix-sources-5.5.19.ebuild b/sys-kernel/liquorix-sources/liquorix-sources-5.5.19.ebuild
index 893a984..421f8ee 100644
--- a/sys-kernel/liquorix-sources/liquorix-sources-5.5.19.ebuild
+++ b/sys-kernel/liquorix-sources/liquorix-sources-5.5.19.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="1"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/liquorix-sources/liquorix-sources-5.6.10.ebuild b/sys-kernel/liquorix-sources/liquorix-sources-5.6.10.ebuild
index 5a62e37..be5b451 100644
--- a/sys-kernel/liquorix-sources/liquorix-sources-5.6.10.ebuild
+++ b/sys-kernel/liquorix-sources/liquorix-sources-5.6.10.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/liquorix-sources/liquorix-sources-5.6.11.ebuild b/sys-kernel/liquorix-sources/liquorix-sources-5.6.11.ebuild
index 5a62e37..be5b451 100644
--- a/sys-kernel/liquorix-sources/liquorix-sources-5.6.11.ebuild
+++ b/sys-kernel/liquorix-sources/liquorix-sources-5.6.11.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/liquorix-sources/liquorix-sources-5.6.7.ebuild b/sys-kernel/liquorix-sources/liquorix-sources-5.6.7.ebuild
index 5a62e37..be5b451 100644
--- a/sys-kernel/liquorix-sources/liquorix-sources-5.6.7.ebuild
+++ b/sys-kernel/liquorix-sources/liquorix-sources-5.6.7.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/liquorix-sources/liquorix-sources-5.6.8.ebuild b/sys-kernel/liquorix-sources/liquorix-sources-5.6.8.ebuild
index 5a62e37..be5b451 100644
--- a/sys-kernel/liquorix-sources/liquorix-sources-5.6.8.ebuild
+++ b/sys-kernel/liquorix-sources/liquorix-sources-5.6.8.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/liquorix-sources/liquorix-sources-5.6.9.ebuild b/sys-kernel/liquorix-sources/liquorix-sources-5.6.9.ebuild
index 5a62e37..be5b451 100644
--- a/sys-kernel/liquorix-sources/liquorix-sources-5.6.9.ebuild
+++ b/sys-kernel/liquorix-sources/liquorix-sources-5.6.9.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/pf-sources/pf-sources-5.5_p7.ebuild b/sys-kernel/pf-sources/pf-sources-5.5_p7.ebuild
index 2a683a5..437f674 100644
--- a/sys-kernel/pf-sources/pf-sources-5.5_p7.ebuild
+++ b/sys-kernel/pf-sources/pf-sources-5.5_p7.ebuild
@@ -23,7 +23,7 @@ K_SECURITY_UNSUPPORTED="1"
 # already included in pf-sources
 K_WANT_GENPATCHES="base extras"
 
-inherit eutils kernel-2
+inherit eutils kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="Linux kernel fork that includes the pf-kernel patchset and Gentoo's genpatches"
diff --git a/sys-kernel/pf-sources/pf-sources-5.5_p8.ebuild b/sys-kernel/pf-sources/pf-sources-5.5_p8.ebuild
index 2a683a5..437f674 100644
--- a/sys-kernel/pf-sources/pf-sources-5.5_p8.ebuild
+++ b/sys-kernel/pf-sources/pf-sources-5.5_p8.ebuild
@@ -23,7 +23,7 @@ K_SECURITY_UNSUPPORTED="1"
 # already included in pf-sources
 K_WANT_GENPATCHES="base extras"
 
-inherit eutils kernel-2
+inherit eutils kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="Linux kernel fork that includes the pf-kernel patchset and Gentoo's genpatches"
diff --git a/sys-kernel/xanmod-sources/xanmod-sources-5.5.10.ebuild b/sys-kernel/xanmod-sources/xanmod-sources-5.5.10.ebuild
index 457ddbc..ae73605 100644
--- a/sys-kernel/xanmod-sources/xanmod-sources-5.5.10.ebuild
+++ b/sys-kernel/xanmod-sources/xanmod-sources-5.5.10.ebuild
@@ -6,7 +6,7 @@ K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 XANMOD_VERSION="2"
 ETYPE="sources"
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="A general-purpose kernel with custom settings and new features"
@@ -23,6 +23,6 @@ src_prepare() {
 
 	kernel-2_src_prepare
 
-	rm ${S}/.config || die
+	rm "${S}"/.config || die
 
 }
diff --git a/sys-kernel/xanmod-sources/xanmod-sources-5.5.13.ebuild b/sys-kernel/xanmod-sources/xanmod-sources-5.5.13.ebuild
index 591344a..6081688 100644
--- a/sys-kernel/xanmod-sources/xanmod-sources-5.5.13.ebuild
+++ b/sys-kernel/xanmod-sources/xanmod-sources-5.5.13.ebuild
@@ -6,7 +6,7 @@ K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 XANMOD_VERSION="1"
 ETYPE="sources"
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="A general-purpose kernel with custom settings and new features"
@@ -23,6 +23,6 @@ src_prepare() {
 
 	kernel-2_src_prepare
 
-	rm ${S}/.config || die
+	rm "${S}"/.config || die
 
 }
diff --git a/sys-kernel/xanmod-sources/xanmod-sources-5.6.10.ebuild b/sys-kernel/xanmod-sources/xanmod-sources-5.6.10.ebuild
index 591344a..6081688 100644
--- a/sys-kernel/xanmod-sources/xanmod-sources-5.6.10.ebuild
+++ b/sys-kernel/xanmod-sources/xanmod-sources-5.6.10.ebuild
@@ -6,7 +6,7 @@ K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 XANMOD_VERSION="1"
 ETYPE="sources"
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="A general-purpose kernel with custom settings and new features"
@@ -23,6 +23,6 @@ src_prepare() {
 
 	kernel-2_src_prepare
 
-	rm ${S}/.config || die
+	rm "${S}"/.config || die
 
 }
diff --git a/sys-kernel/xanmod-sources/xanmod-sources-5.6.5.ebuild b/sys-kernel/xanmod-sources/xanmod-sources-5.6.5.ebuild
index 591344a..6081688 100644
--- a/sys-kernel/xanmod-sources/xanmod-sources-5.6.5.ebuild
+++ b/sys-kernel/xanmod-sources/xanmod-sources-5.6.5.ebuild
@@ -6,7 +6,7 @@ K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 XANMOD_VERSION="1"
 ETYPE="sources"
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="A general-purpose kernel with custom settings and new features"
@@ -23,6 +23,6 @@ src_prepare() {
 
 	kernel-2_src_prepare
 
-	rm ${S}/.config || die
+	rm "${S}"/.config || die
 
 }
diff --git a/sys-kernel/xanmod-sources/xanmod-sources-5.6.6.ebuild b/sys-kernel/xanmod-sources/xanmod-sources-5.6.6.ebuild
index 591344a..6081688 100644
--- a/sys-kernel/xanmod-sources/xanmod-sources-5.6.6.ebuild
+++ b/sys-kernel/xanmod-sources/xanmod-sources-5.6.6.ebuild
@@ -6,7 +6,7 @@ K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 XANMOD_VERSION="1"
 ETYPE="sources"
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="A general-purpose kernel with custom settings and new features"
@@ -23,6 +23,6 @@ src_prepare() {
 
 	kernel-2_src_prepare
 
-	rm ${S}/.config || die
+	rm "${S}"/.config || die
 
 }
diff --git a/sys-kernel/xanmod-sources/xanmod-sources-5.6.8.ebuild b/sys-kernel/xanmod-sources/xanmod-sources-5.6.8.ebuild
index 591344a..6081688 100644
--- a/sys-kernel/xanmod-sources/xanmod-sources-5.6.8.ebuild
+++ b/sys-kernel/xanmod-sources/xanmod-sources-5.6.8.ebuild
@@ -6,7 +6,7 @@ K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 XANMOD_VERSION="1"
 ETYPE="sources"
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 
 DESCRIPTION="A general-purpose kernel with custom settings and new features"
@@ -23,6 +23,6 @@ src_prepare() {
 
 	kernel-2_src_prepare
 
-	rm ${S}/.config || die
+	rm "${S}"/.config || die
 
 }
diff --git a/sys-kernel/zen-sources/zen-sources-5.6.10.ebuild b/sys-kernel/zen-sources/zen-sources-5.6.10.ebuild
index a962d06..1a3ac09 100644
--- a/sys-kernel/zen-sources/zen-sources-5.6.10.ebuild
+++ b/sys-kernel/zen-sources/zen-sources-5.6.10.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/zen-sources/zen-sources-5.6.11.ebuild b/sys-kernel/zen-sources/zen-sources-5.6.11.ebuild
index a962d06..1a3ac09 100644
--- a/sys-kernel/zen-sources/zen-sources-5.6.11.ebuild
+++ b/sys-kernel/zen-sources/zen-sources-5.6.11.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/zen-sources/zen-sources-5.6.7.ebuild b/sys-kernel/zen-sources/zen-sources-5.6.7.ebuild
index a962d06..1a3ac09 100644
--- a/sys-kernel/zen-sources/zen-sources-5.6.7.ebuild
+++ b/sys-kernel/zen-sources/zen-sources-5.6.7.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/zen-sources/zen-sources-5.6.8.ebuild b/sys-kernel/zen-sources/zen-sources-5.6.8.ebuild
index a962d06..1a3ac09 100644
--- a/sys-kernel/zen-sources/zen-sources-5.6.8.ebuild
+++ b/sys-kernel/zen-sources/zen-sources-5.6.8.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch
 
diff --git a/sys-kernel/zen-sources/zen-sources-5.6.9.ebuild b/sys-kernel/zen-sources/zen-sources-5.6.9.ebuild
index a962d06..1a3ac09 100644
--- a/sys-kernel/zen-sources/zen-sources-5.6.9.ebuild
+++ b/sys-kernel/zen-sources/zen-sources-5.6.9.ebuild
@@ -8,7 +8,7 @@ K_GENPATCHES_VER="2"
 K_SECURITY_UNSUPPORTED="1"
 K_NOSETEXTRAVERSION="1"
 
-inherit kernel-2
+inherit kernel-2-src-prepare-overlay
 detect_version
 detect_arch