Upgrade epatch, estack, eutils, and ltprine eclasses to upstream.

The upgraded eutils is needed for upgrading sys-libs/readline. The other
eclasses are inherited by eutils, so they were upgraded together.

BUG=chromium:1117585
TEST=sudo emerge sys-libs/readline

Cq-Depend: chromium:2477724
Change-Id: Ifa1f840e5044bdebca6fcfc84f7bbdadb2eaa71f
Reviewed-on: https://chromium-review.googlesource.com/c/chromiumos/overlays/portage-stable/+/2360511
Tested-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Manoj Gupta <manojgupta@chromium.org>
Reviewed-by: Chris McDonald <cjmcdonald@chromium.org>
Reviewed-by: Benjamin Gordon <bmgordon@chromium.org>
diff --git a/eclass/epatch.eclass b/eclass/epatch.eclass
index 905f68f..da93641 100644
--- a/eclass/epatch.eclass
+++ b/eclass/epatch.eclass
@@ -1,9 +1,10 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2018 Gentoo Foundation
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: epatch.eclass
 # @MAINTAINER:
 # base-system@gentoo.org
+# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6
 # @BLURB: easy patch application functions
 # @DESCRIPTION:
 # An eclass providing epatch and epatch_user functions to easily apply
@@ -11,6 +12,13 @@
 
 if [[ -z ${_EPATCH_ECLASS} ]]; then
 
+case ${EAPI:-0} in
+	0|1|2|3|4|5|6)
+		;;
+	*)
+		die "${ECLASS}: banned in EAPI=${EAPI}; use eapply* instead";;
+esac
+
 inherit estack
 
 # @VARIABLE: EPATCH_SOURCE
diff --git a/eclass/estack.eclass b/eclass/estack.eclass
index f548abf..3f444ee 100644
--- a/eclass/estack.eclass
+++ b/eclass/estack.eclass
@@ -1,4 +1,4 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: estack.eclass
@@ -115,7 +115,8 @@
 	local cnt=${1:-bad}
 	case $# in
 	0) cnt=1 ;;
-	1) isdigit "${cnt}" || die "${FUNCNAME}: first arg must be a number: $*" ;;
+	1) [[ -z ${cnt//[0-9]} ]] \
+		|| die "${FUNCNAME}: first arg must be a number: $*" ;;
 	*) die "${FUNCNAME}: only accepts one arg: $*" ;;
 	esac
 
@@ -153,12 +154,13 @@
 #		eshopts_pop
 # @CODE
 eshopts_push() {
+	# Save both "shopt" and "set -o" option sets, because otherwise
+	# restoring posix would disable expand_aliases by side effect. #662586
+	estack_push eshopts "$(shopt -p -o) $(shopt -p)"
 	if [[ $1 == -[su] ]] ; then
-		estack_push eshopts "$(shopt -p)"
-		[[ $# -eq 0 ]] && return 0
+		[[ $# -le 1 ]] && return 0
 		shopt "$@" || die "${FUNCNAME}: bad options to shopt: $*"
 	else
-		estack_push eshopts "$(shopt -p -o)"
 		[[ $# -eq 0 ]] && return 0
 		set "$@" || die "${FUNCNAME}: bad options to set: $*"
 	fi
@@ -196,17 +198,5 @@
 	umask ${s} || die "${FUNCNAME}: sanity: could not restore umask: ${s}"
 }
 
-# @FUNCTION: isdigit
-# @USAGE: <number> [more numbers]
-# @DESCRIPTION:
-# Return true if all arguments are numbers.
-isdigit() {
-	local d
-	for d ; do
-		[[ ${d:-bad} == *[!0-9]* ]] && return 1
-	done
-	return 0
-}
-
 _ESTACK_ECLASS=1
 fi #_ESTACK_ECLASS
diff --git a/eclass/eutils.eclass b/eclass/eutils.eclass
index 33bc36c..20dec77 100644
--- a/eclass/eutils.eclass
+++ b/eclass/eutils.eclass
@@ -1,6 +1,5 @@
-# Copyright 1999-2014 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
-# $Header: /var/cvsroot/gentoo-x86/eclass/eutils.eclass,v 1.436 2014/07/11 08:21:58 ulm Exp $
 
 # @ECLASS: eutils.eclass
 # @MAINTAINER:
@@ -18,696 +17,13 @@
 if [[ -z ${_EUTILS_ECLASS} ]]; then
 _EUTILS_ECLASS=1
 
-inherit multilib toolchain-funcs
-
-if has "${EAPI:-0}" 0 1 2; then
-
-# @FUNCTION: epause
-# @USAGE: [seconds]
-# @DESCRIPTION:
-# Sleep for the specified number of seconds (default of 5 seconds).  Useful when
-# printing a message the user should probably be reading and often used in
-# conjunction with the ebeep function.  If the EPAUSE_IGNORE env var is set,
-# don't wait at all. Defined in EAPIs 0 1 and 2.
-epause() {
-	[[ -z ${EPAUSE_IGNORE} ]] && sleep ${1:-5}
-}
-
-# @FUNCTION: ebeep
-# @USAGE: [number of beeps]
-# @DESCRIPTION:
-# Issue the specified number of beeps (default of 5 beeps).  Useful when
-# printing a message the user should probably be reading and often used in
-# conjunction with the epause function.  If the EBEEP_IGNORE env var is set,
-# don't beep at all. Defined in EAPIs 0 1 and 2.
-ebeep() {
-	local n
-	if [[ -z ${EBEEP_IGNORE} ]] ; then
-		for ((n=1 ; n <= ${1:-5} ; n++)) ; do
-			echo -ne "\a"
-			sleep 0.1 &>/dev/null ; sleep 0,1 &>/dev/null
-			echo -ne "\a"
-			sleep 1
-		done
-	fi
-}
-
-else
-
-ebeep() {
-	ewarn "QA Notice: ebeep is not defined in EAPI=${EAPI}, please file a bug at http://bugs.gentoo.org"
-}
-
-epause() {
-	ewarn "QA Notice: epause is not defined in EAPI=${EAPI}, please file a bug at http://bugs.gentoo.org"
-}
-
-fi
-
-# @FUNCTION: eqawarn
-# @USAGE: [message]
-# @DESCRIPTION:
-# Proxy to ewarn for package managers that don't provide eqawarn and use the PM
-# implementation if available. Reuses PORTAGE_ELOG_CLASSES as set by the dev
-# profile.
-if ! declare -F eqawarn >/dev/null ; then
-	eqawarn() {
-		has qa ${PORTAGE_ELOG_CLASSES} && ewarn "$@"
-		:
-	}
-fi
-
-# @FUNCTION: ecvs_clean
-# @USAGE: [list of dirs]
-# @DESCRIPTION:
-# Remove CVS directories recursiveley.  Useful when a source tarball contains
-# internal CVS directories.  Defaults to $PWD.
-ecvs_clean() {
-	[[ -z $* ]] && set -- .
-	find "$@" -type d -name 'CVS' -prune -print0 | xargs -0 rm -rf
-	find "$@" -type f -name '.cvs*' -print0 | xargs -0 rm -rf
-}
-
-# @FUNCTION: esvn_clean
-# @USAGE: [list of dirs]
-# @DESCRIPTION:
-# Remove .svn directories recursiveley.  Useful when a source tarball contains
-# internal Subversion directories.  Defaults to $PWD.
-esvn_clean() {
-	[[ -z $* ]] && set -- .
-	find "$@" -type d -name '.svn' -prune -print0 | xargs -0 rm -rf
-}
-
-# @FUNCTION: estack_push
-# @USAGE: <stack> [items to push]
-# @DESCRIPTION:
-# Push any number of items onto the specified stack.  Pick a name that
-# is a valid variable (i.e. stick to alphanumerics), and push as many
-# items as you like onto the stack at once.
-#
-# The following code snippet will echo 5, then 4, then 3, then ...
-# @CODE
-#		estack_push mystack 1 2 3 4 5
-#		while estack_pop mystack i ; do
-#			echo "${i}"
-#		done
-# @CODE
-estack_push() {
-	[[ $# -eq 0 ]] && die "estack_push: incorrect # of arguments"
-	local stack_name="_ESTACK_$1_" ; shift
-	eval ${stack_name}+=\( \"\$@\" \)
-}
-
-# @FUNCTION: estack_pop
-# @USAGE: <stack> [variable]
-# @DESCRIPTION:
-# Pop a single item off the specified stack.  If a variable is specified,
-# the popped item is stored there.  If no more items are available, return
-# 1, else return 0.  See estack_push for more info.
-estack_pop() {
-	[[ $# -eq 0 || $# -gt 2 ]] && die "estack_pop: incorrect # of arguments"
-
-	# We use the fugly _estack_xxx var names to avoid collision with
-	# passing back the return value.  If we used "local i" and the
-	# caller ran `estack_pop ... i`, we'd end up setting the local
-	# copy of "i" rather than the caller's copy.  The _estack_xxx
-	# garbage is preferable to using $1/$2 everywhere as that is a
-	# bit harder to read.
-	local _estack_name="_ESTACK_$1_" ; shift
-	local _estack_retvar=$1 ; shift
-	eval local _estack_i=\${#${_estack_name}\[@\]}
-	# Don't warn -- let the caller interpret this as a failure
-	# or as normal behavior (akin to `shift`)
-	[[ $(( --_estack_i )) -eq -1 ]] && return 1
-
-	if [[ -n ${_estack_retvar} ]] ; then
-		eval ${_estack_retvar}=\"\${${_estack_name}\[${_estack_i}\]}\"
-	fi
-	eval unset ${_estack_name}\[${_estack_i}\]
-}
-
-# @FUNCTION: evar_push
-# @USAGE: <variable to save> [more vars to save]
-# @DESCRIPTION:
-# This let's you temporarily modify a variable and then restore it (including
-# set vs unset semantics).  Arrays are not supported at this time.
-#
-# This is meant for variables where using `local` does not work (such as
-# exported variables, or only temporarily changing things in a func).
-#
-# For example:
-# @CODE
-#		evar_push LC_ALL
-#		export LC_ALL=C
-#		... do some stuff that needs LC_ALL=C set ...
-#		evar_pop
-#
-#		# You can also save/restore more than one var at a time
-#		evar_push BUTTERFLY IN THE SKY
-#		... do stuff with the vars ...
-#		evar_pop     # This restores just one var, SKY
-#		... do more stuff ...
-#		evar_pop 3   # This pops the remaining 3 vars
-# @CODE
-evar_push() {
-	local var val
-	for var ; do
-		[[ ${!var+set} == "set" ]] \
-			&& val=${!var} \
-			|| val="unset_76fc3c462065bb4ca959f939e6793f94"
-		estack_push evar "${var}" "${val}"
-	done
-}
-
-# @FUNCTION: evar_push_set
-# @USAGE: <variable to save> [new value to store]
-# @DESCRIPTION:
-# This is a handy shortcut to save and temporarily set a variable.  If a value
-# is not specified, the var will be unset.
-evar_push_set() {
-	local var=$1
-	evar_push ${var}
-	case $# in
-	1) unset ${var} ;;
-	2) printf -v "${var}" '%s' "$2" ;;
-	*) die "${FUNCNAME}: incorrect # of args: $*" ;;
-	esac
-}
-
-# @FUNCTION: evar_pop
-# @USAGE: [number of vars to restore]
-# @DESCRIPTION:
-# Restore the variables to the state saved with the corresponding
-# evar_push call.  See that function for more details.
-evar_pop() {
-	local cnt=${1:-bad}
-	case $# in
-	0) cnt=1 ;;
-	1) isdigit "${cnt}" || die "${FUNCNAME}: first arg must be a number: $*" ;;
-	*) die "${FUNCNAME}: only accepts one arg: $*" ;;
-	esac
-
-	local var val
-	while (( cnt-- )) ; do
-		estack_pop evar val || die "${FUNCNAME}: unbalanced push"
-		estack_pop evar var || die "${FUNCNAME}: unbalanced push"
-		[[ ${val} == "unset_76fc3c462065bb4ca959f939e6793f94" ]] \
-			&& unset ${var} \
-			|| printf -v "${var}" '%s' "${val}"
-	done
-}
-
-# @FUNCTION: eshopts_push
-# @USAGE: [options to `set` or `shopt`]
-# @DESCRIPTION:
-# Often times code will want to enable a shell option to change code behavior.
-# Since changing shell options can easily break other pieces of code (which
-# assume the default state), eshopts_push is used to (1) push the current shell
-# options onto a stack and (2) pass the specified arguments to set.
-#
-# If the first argument is '-s' or '-u', we assume you want to call `shopt`
-# rather than `set` as there are some options only available via that.
-#
-# A common example is to disable shell globbing so that special meaning/care
-# may be used with variables/arguments to custom functions.  That would be:
-# @CODE
-#		eshopts_push -s noglob
-#		for x in ${foo} ; do
-#			if ...some check... ; then
-#				eshopts_pop
-#				return 0
-#			fi
-#		done
-#		eshopts_pop
-# @CODE
-eshopts_push() {
-	if [[ $1 == -[su] ]] ; then
-		estack_push eshopts "$(shopt -p)"
-		[[ $# -eq 0 ]] && return 0
-		shopt "$@" || die "${FUNCNAME}: bad options to shopt: $*"
-	else
-		estack_push eshopts $-
-		[[ $# -eq 0 ]] && return 0
-		set "$@" || die "${FUNCNAME}: bad options to set: $*"
-	fi
-}
-
-# @FUNCTION: eshopts_pop
-# @USAGE:
-# @DESCRIPTION:
-# Restore the shell options to the state saved with the corresponding
-# eshopts_push call.  See that function for more details.
-eshopts_pop() {
-	local s
-	estack_pop eshopts s || die "${FUNCNAME}: unbalanced push"
-	if [[ ${s} == "shopt -"* ]] ; then
-		eval "${s}" || die "${FUNCNAME}: sanity: invalid shopt options: ${s}"
-	else
-		set +$-     || die "${FUNCNAME}: sanity: invalid shell settings: $-"
-		set -${s}   || die "${FUNCNAME}: sanity: unable to restore saved shell settings: ${s}"
-	fi
-}
-
-# @FUNCTION: eumask_push
-# @USAGE: <new umask>
-# @DESCRIPTION:
-# Set the umask to the new value specified while saving the previous
-# value onto a stack.  Useful for temporarily changing the umask.
-eumask_push() {
-	estack_push eumask "$(umask)"
-	umask "$@" || die "${FUNCNAME}: bad options to umask: $*"
-}
-
-# @FUNCTION: eumask_pop
-# @USAGE:
-# @DESCRIPTION:
-# Restore the previous umask state.
-eumask_pop() {
-	[[ $# -eq 0 ]] || die "${FUNCNAME}: we take no options"
-	local s
-	estack_pop eumask s || die "${FUNCNAME}: unbalanced push"
-	umask ${s} || die "${FUNCNAME}: sanity: could not restore umask: ${s}"
-}
-
-# @FUNCTION: isdigit
-# @USAGE: <number> [more numbers]
-# @DESCRIPTION:
-# Return true if all arguments are numbers.
-isdigit() {
-	local d
-	for d ; do
-		[[ ${d:-bad} == *[!0-9]* ]] && return 1
-	done
-	return 0
-}
-
-# @VARIABLE: EPATCH_SOURCE
-# @DESCRIPTION:
-# Default directory to search for patches.
-EPATCH_SOURCE="${WORKDIR}/patch"
-# @VARIABLE: EPATCH_SUFFIX
-# @DESCRIPTION:
-# Default extension for patches (do not prefix the period yourself).
-EPATCH_SUFFIX="patch.bz2"
-# @VARIABLE: EPATCH_OPTS
-# @DESCRIPTION:
-# Options to pass to patch.  Meant for ebuild/package-specific tweaking
-# such as forcing the patch level (-p#) or fuzz (-F#) factor.  Note that
-# for single patch tweaking, you can also pass flags directly to epatch.
-EPATCH_OPTS=""
-# @VARIABLE: EPATCH_COMMON_OPTS
-# @DESCRIPTION:
-# Common options to pass to `patch`.  You probably should never need to
-# change these.  If you do, please discuss it with base-system first to
-# be sure.
-# @CODE
-#	-g0 - keep RCS, ClearCase, Perforce and SCCS happy #24571
-#	--no-backup-if-mismatch - do not leave .orig files behind
-#	-E - automatically remove empty files
-# @CODE
-EPATCH_COMMON_OPTS="-g0 -E --no-backup-if-mismatch"
-# @VARIABLE: EPATCH_EXCLUDE
-# @DESCRIPTION:
-# List of patches not to apply.	 Note this is only file names,
-# and not the full path.  Globs accepted.
-EPATCH_EXCLUDE=""
-# @VARIABLE: EPATCH_SINGLE_MSG
-# @DESCRIPTION:
-# Change the printed message for a single patch.
-EPATCH_SINGLE_MSG=""
-# @VARIABLE: EPATCH_MULTI_MSG
-# @DESCRIPTION:
-# Change the printed message for multiple patches.
-EPATCH_MULTI_MSG="Applying various patches (bugfixes/updates) ..."
-# @VARIABLE: EPATCH_FORCE
-# @DESCRIPTION:
-# Only require patches to match EPATCH_SUFFIX rather than the extended
-# arch naming style.
-EPATCH_FORCE="no"
-# @VARIABLE: EPATCH_USER_EXCLUDE
-# @DEFAULT_UNSET
-# @DESCRIPTION:
-# List of patches not to apply.	 Note this is only file names,
-# and not the full path.  Globs accepted.
-
-# @FUNCTION: epatch
-# @USAGE: [options] [patches] [dirs of patches]
-# @DESCRIPTION:
-# epatch is designed to greatly simplify the application of patches.  It can
-# process patch files directly, or directories of patches.  The patches may be
-# compressed (bzip/gzip/etc...) or plain text.  You generally need not specify
-# the -p option as epatch will automatically attempt -p0 to -p4 until things
-# apply successfully.
-#
-# If you do not specify any patches/dirs, then epatch will default to the
-# directory specified by EPATCH_SOURCE.
-#
-# Any options specified that start with a dash will be passed down to patch
-# for this specific invocation.  As soon as an arg w/out a dash is found, then
-# arg processing stops.
-#
-# When processing directories, epatch will apply all patches that match:
-# @CODE
-#	if ${EPATCH_FORCE} != "yes"
-#		??_${ARCH}_foo.${EPATCH_SUFFIX}
-#	else
-#		*.${EPATCH_SUFFIX}
-# @CODE
-# The leading ?? are typically numbers used to force consistent patch ordering.
-# The arch field is used to apply patches only for the host architecture with
-# the special value of "all" means apply for everyone.  Note that using values
-# other than "all" is highly discouraged -- you should apply patches all the
-# time and let architecture details be detected at configure/compile time.
-#
-# If EPATCH_SUFFIX is empty, then no period before it is implied when searching
-# for patches to apply.
-#
-# Refer to the other EPATCH_xxx variables for more customization of behavior.
-epatch() {
-	_epatch_draw_line() {
-		# create a line of same length as input string
-		[[ -z $1 ]] && set "$(printf "%65s" '')"
-		echo "${1//?/=}"
-	}
-
-	unset P4CONFIG P4PORT P4USER # keep perforce at bay #56402
-
-	# First process options.  We localize the EPATCH_OPTS setting
-	# from above so that we can pass it on in the loop below with
-	# any additional values the user has specified.
-	local EPATCH_OPTS=( ${EPATCH_OPTS[*]} )
-	while [[ $# -gt 0 ]] ; do
-		case $1 in
-		-*) EPATCH_OPTS+=( "$1" ) ;;
-		*) break ;;
-		esac
-		shift
-	done
-
-	# Let the rest of the code process one user arg at a time --
-	# each arg may expand into multiple patches, and each arg may
-	# need to start off with the default global EPATCH_xxx values
-	if [[ $# -gt 1 ]] ; then
-		local m
-		for m in "$@" ; do
-			epatch "${m}"
-		done
-		return 0
-	fi
-
-	local SINGLE_PATCH="no"
-	# no args means process ${EPATCH_SOURCE}
-	[[ $# -eq 0 ]] && set -- "${EPATCH_SOURCE}"
-
-	if [[ -f $1 ]] ; then
-		SINGLE_PATCH="yes"
-		set -- "$1"
-		# Use the suffix from the single patch (localize it); the code
-		# below will find the suffix for us
-		local EPATCH_SUFFIX=$1
-
-	elif [[ -d $1 ]] ; then
-		# We have to force sorting to C so that the wildcard expansion is consistent #471666.
-		evar_push_set LC_COLLATE C
-		# Some people like to make dirs of patches w/out suffixes (vim).
-		set -- "$1"/*${EPATCH_SUFFIX:+."${EPATCH_SUFFIX}"}
-		evar_pop
-
-	elif [[ -f ${EPATCH_SOURCE}/$1 ]] ; then
-		# Re-use EPATCH_SOURCE as a search dir
-		epatch "${EPATCH_SOURCE}/$1"
-		return $?
-
-	else
-		# sanity check ... if it isn't a dir or file, wtf man ?
-		[[ $# -ne 0 ]] && EPATCH_SOURCE=$1
-		echo
-		eerror "Cannot find \$EPATCH_SOURCE!  Value for \$EPATCH_SOURCE is:"
-		eerror
-		eerror "  ${EPATCH_SOURCE}"
-		eerror "  ( ${EPATCH_SOURCE##*/} )"
-		echo
-		die "Cannot find \$EPATCH_SOURCE!"
-	fi
-
-	# Now that we know we're actually going to apply something, merge
-	# all of the patch options back in to a single variable for below.
-	EPATCH_OPTS="${EPATCH_COMMON_OPTS} ${EPATCH_OPTS[*]}"
-
-	local PIPE_CMD
-	case ${EPATCH_SUFFIX##*\.} in
-		xz)      PIPE_CMD="xz -dc"    ;;
-		lzma)    PIPE_CMD="lzma -dc"  ;;
-		bz2)     PIPE_CMD="bzip2 -dc" ;;
-		gz|Z|z)  PIPE_CMD="gzip -dc"  ;;
-		ZIP|zip) PIPE_CMD="unzip -p"  ;;
-		*)       ;;
-	esac
-
-	[[ ${SINGLE_PATCH} == "no" ]] && einfo "${EPATCH_MULTI_MSG}"
-
-	local x
-	for x in "$@" ; do
-		# If the patch dir given contains subdirs, or our EPATCH_SUFFIX
-		# didn't match anything, ignore continue on
-		[[ ! -f ${x} ]] && continue
-
-		local patchname=${x##*/}
-
-		# Apply single patches, or forced sets of patches, or
-		# patches with ARCH dependant names.
-		#	???_arch_foo.patch
-		# Else, skip this input altogether
-		local a=${patchname#*_} # strip the ???_
-		a=${a%%_*}              # strip the _foo.patch
-		if ! [[ ${SINGLE_PATCH} == "yes" || \
-				${EPATCH_FORCE} == "yes" || \
-				${a} == all     || \
-				${a} == ${ARCH} ]]
-		then
-			continue
-		fi
-
-		# Let people filter things dynamically
-		if [[ -n ${EPATCH_EXCLUDE} ]] ; then
-			# let people use globs in the exclude
-			eshopts_push -o noglob
-
-			local ex
-			for ex in ${EPATCH_EXCLUDE} ; do
-				if [[ ${patchname} == ${ex} ]] ; then
-					einfo "  Skipping ${patchname} due to EPATCH_EXCLUDE ..."
-					eshopts_pop
-					continue 2
-				fi
-			done
-
-			for ex in ${EPATCH_USER_EXCLUDE} ; do
-				if [[ ${patchname} == ${ex} ]] ; then
-					einfo "  Skipping ${patchname} due to EPATCH_USER_EXCLUDE ..."
-					eshopts_pop
-					continue 2
-				fi
-			done
-
-			eshopts_pop
-		fi
-
-		if [[ ${SINGLE_PATCH} == "yes" ]] ; then
-			if [[ -n ${EPATCH_SINGLE_MSG} ]] ; then
-				einfo "${EPATCH_SINGLE_MSG}"
-			else
-				einfo "Applying ${patchname} ..."
-			fi
-		else
-			einfo "  ${patchname} ..."
-		fi
-
-		# most of the time, there will only be one run per unique name,
-		# but if there are more, make sure we get unique log filenames
-		local STDERR_TARGET="${T}/${patchname}.out"
-		if [[ -e ${STDERR_TARGET} ]] ; then
-			STDERR_TARGET="${T}/${patchname}-$$.out"
-		fi
-
-		printf "***** %s *****\nPWD: %s\n\n" "${patchname}" "${PWD}" > "${STDERR_TARGET}"
-
-		# Decompress the patch if need be
-		local count=0
-		local PATCH_TARGET
-		if [[ -n ${PIPE_CMD} ]] ; then
-			PATCH_TARGET="${T}/$$.patch"
-			echo "PIPE_COMMAND:  ${PIPE_CMD} ${x} > ${PATCH_TARGET}" >> "${STDERR_TARGET}"
-
-			if ! (${PIPE_CMD} "${x}" > "${PATCH_TARGET}") >> "${STDERR_TARGET}" 2>&1 ; then
-				echo
-				eerror "Could not extract patch!"
-				#die "Could not extract patch!"
-				count=5
-				break
-			fi
-		else
-			PATCH_TARGET=${x}
-		fi
-
-		# Check for absolute paths in patches.  If sandbox is disabled,
-		# people could (accidently) patch files in the root filesystem.
-		# Or trigger other unpleasantries #237667.  So disallow -p0 on
-		# such patches.
-		local abs_paths=$(egrep -n '^[-+]{3} /' "${PATCH_TARGET}" | awk '$2 != "/dev/null" { print }')
-		if [[ -n ${abs_paths} ]] ; then
-			count=1
-			printf "NOTE: skipping -p0 due to absolute paths in patch:\n%s\n" "${abs_paths}" >> "${STDERR_TARGET}"
-		fi
-		# Similar reason, but with relative paths.
-		local rel_paths=$(egrep -n '^[-+]{3} [^	]*[.][.]/' "${PATCH_TARGET}")
-		if [[ -n ${rel_paths} ]] ; then
-			echo
-			eerror "Rejected Patch: ${patchname} !"
-			eerror " ( ${PATCH_TARGET} )"
-			eerror
-			eerror "Your patch uses relative paths '../':"
-			eerror "${rel_paths}"
-			echo
-			die "you need to fix the relative paths in patch"
-		fi
-
-		# Dynamically detect the correct -p# ... i'm lazy, so shoot me :/
-		local patch_cmd
-		# Handle aliased patch command #404447 #461568
-		local patch="patch"
-		eval $(alias patch 2>/dev/null | sed 's:^alias ::')
-		while [[ ${count} -lt 5 ]] ; do
-			patch_cmd="${patch} -p${count} ${EPATCH_OPTS}"
-
-			# Generate some useful debug info ...
-			(
-			_epatch_draw_line "***** ${patchname} *****"
-			echo
-			echo "PATCH COMMAND:  ${patch_cmd} < '${PATCH_TARGET}'"
-			echo
-			_epatch_draw_line "***** ${patchname} *****"
-			${patch_cmd} --dry-run -f < "${PATCH_TARGET}" 2>&1
-			ret=$?
-			echo
-			echo "patch program exited with status ${ret}"
-			exit ${ret}
-			) >> "${STDERR_TARGET}"
-
-			if [ $? -eq 0 ] ; then
-				(
-				_epatch_draw_line "***** ${patchname} *****"
-				echo
-				echo "ACTUALLY APPLYING ${patchname} ..."
-				echo
-				_epatch_draw_line "***** ${patchname} *****"
-				${patch_cmd} < "${PATCH_TARGET}" 2>&1
-				ret=$?
-				echo
-				echo "patch program exited with status ${ret}"
-				exit ${ret}
-				) >> "${STDERR_TARGET}"
-
-				if [ $? -ne 0 ] ; then
-					echo
-					eerror "A dry-run of patch command succeeded, but actually"
-					eerror "applying the patch failed!"
-					#die "Real world sux compared to the dreamworld!"
-					count=5
-				fi
-				break
-			fi
-
-			: $(( count++ ))
-		done
-
-		# if we had to decompress the patch, delete the temp one
-		if [[ -n ${PIPE_CMD} ]] ; then
-			rm -f "${PATCH_TARGET}"
-		fi
-
-		if [[ ${count} -ge 5 ]] ; then
-			echo
-			eerror "Failed Patch: ${patchname} !"
-			eerror " ( ${PATCH_TARGET} )"
-			eerror
-			eerror "Include in your bugreport the contents of:"
-			eerror
-			eerror "  ${STDERR_TARGET}"
-			echo
-			die "Failed Patch: ${patchname}!"
-		fi
-
-		# if everything worked, delete the full debug patch log
-		rm -f "${STDERR_TARGET}"
-
-		# then log away the exact stuff for people to review later
-		cat <<-EOF >> "${T}/epatch.log"
-		PATCH: ${x}
-		CMD: ${patch_cmd}
-		PWD: ${PWD}
-
-		EOF
-		eend 0
-	done
-
-	[[ ${SINGLE_PATCH} == "no" ]] && einfo "Done with patching"
-	: # everything worked
-}
-
-# @FUNCTION: epatch_user
-# @USAGE:
-# @DESCRIPTION:
-# Applies user-provided patches to the source tree. The patches are
-# taken from /etc/portage/patches/<CATEGORY>/<P-PR|P|PN>[:SLOT]/, where the first
-# of these three directories to exist will be the one to use, ignoring
-# any more general directories which might exist as well. They must end
-# in ".patch" to be applied.
-#
-# User patches are intended for quick testing of patches without ebuild
-# modifications, as well as for permanent customizations a user might
-# desire. Obviously, there can be no official support for arbitrarily
-# patched ebuilds. So whenever a build log in a bug report mentions that
-# user patches were applied, the user should be asked to reproduce the
-# problem without these.
-#
-# Not all ebuilds do call this function, so placing patches in the
-# stated directory might or might not work, depending on the package and
-# the eclasses it inherits and uses. It is safe to call the function
-# repeatedly, so it is always possible to add a call at the ebuild
-# level. The first call is the time when the patches will be
-# applied.
-#
-# Ideally, this function should be called after gentoo-specific patches
-# have been applied, so that their code can be modified as well, but
-# before calls to e.g. eautoreconf, as the user patches might affect
-# autotool input files as well.
-epatch_user() {
-	[[ $# -ne 0 ]] && die "epatch_user takes no options"
-
-	# Allow multiple calls to this function; ignore all but the first
-	local applied="${T}/epatch_user.log"
-	[[ -e ${applied} ]] && return 2
-
-	# don't clobber any EPATCH vars that the parent might want
-	local EPATCH_SOURCE check base=${PORTAGE_CONFIGROOT%/}/etc/portage/patches
-	for check in ${CATEGORY}/{${P}-${PR},${P},${PN}}{,:${SLOT}}; do
-		EPATCH_SOURCE=${base}/${CTARGET}/${check}
-		[[ -r ${EPATCH_SOURCE} ]] || EPATCH_SOURCE=${base}/${CHOST}/${check}
-		[[ -r ${EPATCH_SOURCE} ]] || EPATCH_SOURCE=${base}/${check}
-		if [[ -d ${EPATCH_SOURCE} ]] ; then
-			EPATCH_SOURCE=${EPATCH_SOURCE} \
-			EPATCH_SUFFIX="patch" \
-			EPATCH_FORCE="yes" \
-			EPATCH_MULTI_MSG="Applying user patches from ${EPATCH_SOURCE} ..." \
-			epatch
-			echo "${EPATCH_SOURCE}" > "${applied}"
-			return 0
-		fi
-	done
-	echo "none" > "${applied}"
-	return 1
-}
+# implicitly inherited (now split) eclasses
+case ${EAPI:-0} in
+0|1|2|3|4|5|6)
+	inherit desktop epatch estack ltprune multilib preserve-libs \
+		toolchain-funcs vcs-clean
+	;;
+esac
 
 # @FUNCTION: emktemp
 # @USAGE: [temp dir]
@@ -756,427 +72,6 @@
 	sed -i 's/\r$//' -- "$@" || die
 }
 
-# @FUNCTION: make_desktop_entry
-# @USAGE: make_desktop_entry(<command>, [name], [icon], [type], [fields])
-# @DESCRIPTION:
-# Make a .desktop file.
-#
-# @CODE
-# binary:   what command does the app run with ?
-# name:     the name that will show up in the menu
-# icon:     the icon to use in the menu entry
-#           this can be relative (to /usr/share/pixmaps) or
-#           a full path to an icon
-# type:     what kind of application is this?
-#           for categories:
-#           http://standards.freedesktop.org/menu-spec/latest/apa.html
-#           if unset, function tries to guess from package's category
-# fields:	extra fields to append to the desktop file; a printf string
-# @CODE
-make_desktop_entry() {
-	[[ -z $1 ]] && die "make_desktop_entry: You must specify the executable"
-
-	local exec=${1}
-	local name=${2:-${PN}}
-	local icon=${3:-${PN}}
-	local type=${4}
-	local fields=${5}
-
-	if [[ -z ${type} ]] ; then
-		local catmaj=${CATEGORY%%-*}
-		local catmin=${CATEGORY##*-}
-		case ${catmaj} in
-			app)
-				case ${catmin} in
-					accessibility) type="Utility;Accessibility";;
-					admin)         type=System;;
-					antivirus)     type=System;;
-					arch)          type="Utility;Archiving";;
-					backup)        type="Utility;Archiving";;
-					cdr)           type="AudioVideo;DiscBurning";;
-					dicts)         type="Office;Dictionary";;
-					doc)           type=Documentation;;
-					editors)       type="Utility;TextEditor";;
-					emacs)         type="Development;TextEditor";;
-					emulation)     type="System;Emulator";;
-					laptop)        type="Settings;HardwareSettings";;
-					office)        type=Office;;
-					pda)           type="Office;PDA";;
-					vim)           type="Development;TextEditor";;
-					xemacs)        type="Development;TextEditor";;
-				esac
-				;;
-
-			dev)
-				type="Development"
-				;;
-
-			games)
-				case ${catmin} in
-					action|fps) type=ActionGame;;
-					arcade)     type=ArcadeGame;;
-					board)      type=BoardGame;;
-					emulation)  type=Emulator;;
-					kids)       type=KidsGame;;
-					puzzle)     type=LogicGame;;
-					roguelike)  type=RolePlaying;;
-					rpg)        type=RolePlaying;;
-					simulation) type=Simulation;;
-					sports)     type=SportsGame;;
-					strategy)   type=StrategyGame;;
-				esac
-				type="Game;${type}"
-				;;
-
-			gnome)
-				type="Gnome;GTK"
-				;;
-
-			kde)
-				type="KDE;Qt"
-				;;
-
-			mail)
-				type="Network;Email"
-				;;
-
-			media)
-				case ${catmin} in
-					gfx)
-						type=Graphics
-						;;
-					*)
-						case ${catmin} in
-							radio) type=Tuner;;
-							sound) type=Audio;;
-							tv)    type=TV;;
-							video) type=Video;;
-						esac
-						type="AudioVideo;${type}"
-						;;
-				esac
-				;;
-
-			net)
-				case ${catmin} in
-					dialup) type=Dialup;;
-					ftp)    type=FileTransfer;;
-					im)     type=InstantMessaging;;
-					irc)    type=IRCClient;;
-					mail)   type=Email;;
-					news)   type=News;;
-					nntp)   type=News;;
-					p2p)    type=FileTransfer;;
-					voip)   type=Telephony;;
-				esac
-				type="Network;${type}"
-				;;
-
-			sci)
-				case ${catmin} in
-					astro*)  type=Astronomy;;
-					bio*)    type=Biology;;
-					calc*)   type=Calculator;;
-					chem*)   type=Chemistry;;
-					elec*)   type=Electronics;;
-					geo*)    type=Geology;;
-					math*)   type=Math;;
-					physics) type=Physics;;
-					visual*) type=DataVisualization;;
-				esac
-				type="Education;Science;${type}"
-				;;
-
-			sys)
-				type="System"
-				;;
-
-			www)
-				case ${catmin} in
-					client) type=WebBrowser;;
-				esac
-				type="Network;${type}"
-				;;
-
-			*)
-				type=
-				;;
-		esac
-	fi
-	if [ "${SLOT}" == "0" ] ; then
-		local desktop_name="${PN}"
-	else
-		local desktop_name="${PN}-${SLOT}"
-	fi
-	local desktop="${T}/$(echo ${exec} | sed 's:[[:space:]/:]:_:g')-${desktop_name}.desktop"
-	#local desktop=${T}/${exec%% *:-${desktop_name}}.desktop
-
-	# Don't append another ";" when a valid category value is provided.
-	type=${type%;}${type:+;}
-
-	eshopts_push -s extglob
-	if [[ -n ${icon} && ${icon} != /* ]] && [[ ${icon} == *.xpm || ${icon} == *.png || ${icon} == *.svg ]]; then
-		ewarn "As described in the Icon Theme Specification, icon file extensions are not"
-		ewarn "allowed in .desktop files if the value is not an absolute path."
-		icon=${icon%.@(xpm|png|svg)}
-	fi
-	eshopts_pop
-
-	cat <<-EOF > "${desktop}"
-	[Desktop Entry]
-	Name=${name}
-	Type=Application
-	Comment=${DESCRIPTION}
-	Exec=${exec}
-	TryExec=${exec%% *}
-	Icon=${icon}
-	Categories=${type}
-	EOF
-
-	if [[ ${fields:-=} != *=* ]] ; then
-		# 5th arg used to be value to Path=
-		ewarn "make_desktop_entry: update your 5th arg to read Path=${fields}"
-		fields="Path=${fields}"
-	fi
-	[[ -n ${fields} ]] && printf '%b\n' "${fields}" >> "${desktop}"
-
-	(
-		# wrap the env here so that the 'insinto' call
-		# doesn't corrupt the env of the caller
-		insinto /usr/share/applications
-		doins "${desktop}"
-	) || die "installing desktop file failed"
-}
-
-# @FUNCTION: _eutils_eprefix_init
-# @INTERNAL
-# @DESCRIPTION:
-# Initialized prefix variables for EAPI<3.
-_eutils_eprefix_init() {
-	has "${EAPI:-0}" 0 1 2 && : ${ED:=${D}} ${EPREFIX:=} ${EROOT:=${ROOT}}
-}
-
-# @FUNCTION: validate_desktop_entries
-# @USAGE: [directories]
-# @MAINTAINER:
-# Carsten Lohrke <carlo@gentoo.org>
-# @DESCRIPTION:
-# Validate desktop entries using desktop-file-utils
-validate_desktop_entries() {
-	_eutils_eprefix_init
-	if [[ -x "${EPREFIX}"/usr/bin/desktop-file-validate ]] ; then
-		einfo "Checking desktop entry validity"
-		local directories=""
-		for d in /usr/share/applications $@ ; do
-			[[ -d ${ED}${d} ]] && directories="${directories} ${ED}${d}"
-		done
-		if [[ -n ${directories} ]] ; then
-			for FILE in $(find ${directories} -name "*\.desktop" \
-							-not -path '*.hidden*' | sort -u 2>/dev/null)
-			do
-				local temp=$(desktop-file-validate ${FILE} | grep -v "warning:" | \
-								sed -e "s|error: ||" -e "s|${FILE}:|--|g" )
-				[[ -n $temp ]] && elog ${temp/--/${FILE/${ED}/}:}
-			done
-		fi
-		echo ""
-	else
-		einfo "Passing desktop entry validity check. Install dev-util/desktop-file-utils, if you want to help to improve Gentoo."
-	fi
-}
-
-# @FUNCTION: make_session_desktop
-# @USAGE: <title> <command> [command args...]
-# @DESCRIPTION:
-# Make a GDM/KDM Session file.  The title is the file to execute to start the
-# Window Manager.  The command is the name of the Window Manager.
-#
-# You can set the name of the file via the ${wm} variable.
-make_session_desktop() {
-	[[ -z $1 ]] && eerror "$0: You must specify the title" && return 1
-	[[ -z $2 ]] && eerror "$0: You must specify the command" && return 1
-
-	local title=$1
-	local command=$2
-	local desktop=${T}/${wm:-${PN}}.desktop
-	shift 2
-
-	cat <<-EOF > "${desktop}"
-	[Desktop Entry]
-	Name=${title}
-	Comment=This session logs you into ${title}
-	Exec=${command} $*
-	TryExec=${command}
-	Type=XSession
-	EOF
-
-	(
-	# wrap the env here so that the 'insinto' call
-	# doesn't corrupt the env of the caller
-	insinto /usr/share/xsessions
-	doins "${desktop}"
-	)
-}
-
-# @FUNCTION: domenu
-# @USAGE: <menus>
-# @DESCRIPTION:
-# Install the list of .desktop menu files into the appropriate directory
-# (/usr/share/applications).
-domenu() {
-	(
-	# wrap the env here so that the 'insinto' call
-	# doesn't corrupt the env of the caller
-	local i j ret=0
-	insinto /usr/share/applications
-	for i in "$@" ; do
-		if [[ -f ${i} ]] ; then
-			doins "${i}"
-			((ret+=$?))
-		elif [[ -d ${i} ]] ; then
-			for j in "${i}"/*.desktop ; do
-				doins "${j}"
-				((ret+=$?))
-			done
-		else
-			((++ret))
-		fi
-	done
-	exit ${ret}
-	)
-}
-
-# @FUNCTION: newmenu
-# @USAGE: <menu> <newname>
-# @DESCRIPTION:
-# Like all other new* functions, install the specified menu as newname.
-newmenu() {
-	(
-	# wrap the env here so that the 'insinto' call
-	# doesn't corrupt the env of the caller
-	insinto /usr/share/applications
-	newins "$@"
-	)
-}
-
-# @FUNCTION: _iconins
-# @INTERNAL
-# @DESCRIPTION:
-# function for use in doicon and newicon
-_iconins() {
-	(
-	# wrap the env here so that the 'insinto' call
-	# doesn't corrupt the env of the caller
-	local funcname=$1; shift
-	local size dir
-	local context=apps
-	local theme=hicolor
-
-	while [[ $# -gt 0 ]] ; do
-		case $1 in
-		-s|--size)
-			if [[ ${2%%x*}x${2%%x*} == "$2" ]] ; then
-				size=${2%%x*}
-			else
-				size=${2}
-			fi
-			case ${size} in
-			16|22|24|32|36|48|64|72|96|128|192|256)
-				size=${size}x${size};;
-			scalable)
-				;;
-			*)
-				eerror "${size} is an unsupported icon size!"
-				exit 1;;
-			esac
-			shift 2;;
-		-t|--theme)
-			theme=${2}
-			shift 2;;
-		-c|--context)
-			context=${2}
-			shift 2;;
-		*)
-			if [[ -z ${size} ]] ; then
-				insinto /usr/share/pixmaps
-			else
-				insinto /usr/share/icons/${theme}/${size}/${context}
-			fi
-
-			if [[ ${funcname} == doicon ]] ; then
-				if [[ -f $1 ]] ; then
-					doins "${1}"
-				elif [[ -d $1 ]] ; then
-					shopt -s nullglob
-					doins "${1}"/*.{png,svg}
-					shopt -u nullglob
-				else
-					eerror "${1} is not a valid file/directory!"
-					exit 1
-				fi
-			else
-				break
-			fi
-			shift 1;;
-		esac
-	done
-	if [[ ${funcname} == newicon ]] ; then
-		newins "$@"
-	fi
-	) || die
-}
-
-# @FUNCTION: doicon
-# @USAGE: [options] <icons>
-# @DESCRIPTION:
-# Install icon into the icon directory /usr/share/icons or into
-# /usr/share/pixmaps if "--size" is not set.
-# This is useful in conjunction with creating desktop/menu files.
-#
-# @CODE
-#  options:
-#  -s, --size
-#    !!! must specify to install into /usr/share/icons/... !!!
-#    size of the icon, like 48 or 48x48
-#    supported icon sizes are:
-#    16 22 24 32 36 48 64 72 96 128 192 256 scalable
-#  -c, --context
-#    defaults to "apps"
-#  -t, --theme
-#    defaults to "hicolor"
-#
-# icons: list of icons
-#
-# example 1: doicon foobar.png fuqbar.svg suckbar.png
-# results in: insinto /usr/share/pixmaps
-#             doins foobar.png fuqbar.svg suckbar.png
-#
-# example 2: doicon -s 48 foobar.png fuqbar.png blobbar.png
-# results in: insinto /usr/share/icons/hicolor/48x48/apps
-#             doins foobar.png fuqbar.png blobbar.png
-# @CODE
-doicon() {
-	_iconins ${FUNCNAME} "$@"
-}
-
-# @FUNCTION: newicon
-# @USAGE: [options] <icon> <newname>
-# @DESCRIPTION:
-# Like doicon, install the specified icon as newname.
-#
-# @CODE
-# example 1: newicon foobar.png NEWNAME.png
-# results in: insinto /usr/share/pixmaps
-#             newins foobar.png NEWNAME.png
-#
-# example 2: newicon -s 48 foobar.png NEWNAME.png
-# results in: insinto /usr/share/icons/hicolor/48x48/apps
-#             newins foobar.png NEWNAME.png
-# @CODE
-newicon() {
-	_iconins ${FUNCNAME} "$@"
-}
-
 # @FUNCTION: strip-linguas
 # @USAGE: [<allow LINGUAS>|<-i|-u> <directories of .po files>]
 # @DESCRIPTION:
@@ -1226,186 +121,6 @@
 	export LINGUAS=${newls:1}
 }
 
-# @FUNCTION: preserve_old_lib
-# @USAGE: <libs to preserve> [more libs]
-# @DESCRIPTION:
-# These functions are useful when a lib in your package changes ABI SONAME.
-# An example might be from libogg.so.0 to libogg.so.1.  Removing libogg.so.0
-# would break packages that link against it.  Most people get around this
-# by using the portage SLOT mechanism, but that is not always a relevant
-# solution, so instead you can call this from pkg_preinst.  See also the
-# preserve_old_lib_notify function.
-preserve_old_lib() {
-	_eutils_eprefix_init
-	if [[ ${EBUILD_PHASE} != "preinst" ]] ; then
-		eerror "preserve_old_lib() must be called from pkg_preinst() only"
-		die "Invalid preserve_old_lib() usage"
-	fi
-	[[ -z $1 ]] && die "Usage: preserve_old_lib <library to preserve> [more libraries to preserve]"
-
-	# let portage worry about it
-	has preserve-libs ${FEATURES} && return 0
-
-	local lib dir
-	for lib in "$@" ; do
-		[[ -e ${EROOT}/${lib} ]] || continue
-		dir=${lib%/*}
-		dodir ${dir} || die "dodir ${dir} failed"
-		cp "${EROOT}"/${lib} "${ED}"/${lib} || die "cp ${lib} failed"
-		touch "${ED}"/${lib}
-	done
-}
-
-# @FUNCTION: preserve_old_lib_notify
-# @USAGE: <libs to notify> [more libs]
-# @DESCRIPTION:
-# Spit helpful messages about the libraries preserved by preserve_old_lib.
-preserve_old_lib_notify() {
-	if [[ ${EBUILD_PHASE} != "postinst" ]] ; then
-		eerror "preserve_old_lib_notify() must be called from pkg_postinst() only"
-		die "Invalid preserve_old_lib_notify() usage"
-	fi
-
-	# let portage worry about it
-	has preserve-libs ${FEATURES} && return 0
-
-	_eutils_eprefix_init
-
-	local lib notice=0
-	for lib in "$@" ; do
-		[[ -e ${EROOT}/${lib} ]] || continue
-		if [[ ${notice} -eq 0 ]] ; then
-			notice=1
-			ewarn "Old versions of installed libraries were detected on your system."
-			ewarn "In order to avoid breaking packages that depend on these old libs,"
-			ewarn "the libraries are not being removed.  You need to run revdep-rebuild"
-			ewarn "in order to remove these old dependencies.  If you do not have this"
-			ewarn "helper program, simply emerge the 'gentoolkit' package."
-			ewarn
-		fi
-		ewarn "  # revdep-rebuild --library '${lib}' && rm '${lib}'"
-	done
-}
-
-# @FUNCTION: built_with_use
-# @USAGE: [--hidden] [--missing <action>] [-a|-o] <DEPEND ATOM> <List of USE flags>
-# @DESCRIPTION:
-#
-# Deprecated: Use EAPI 2 use deps in DEPEND|RDEPEND and with has_version calls.
-#
-# A temporary hack until portage properly supports DEPENDing on USE
-# flags being enabled in packages.  This will check to see if the specified
-# DEPEND atom was built with the specified list of USE flags.  The
-# --missing option controls the behavior if called on a package that does
-# not actually support the defined USE flags (aka listed in IUSE).
-# The default is to abort (call die).  The -a and -o flags control
-# the requirements of the USE flags.  They correspond to "and" and "or"
-# logic.  So the -a flag means all listed USE flags must be enabled
-# while the -o flag means at least one of the listed IUSE flags must be
-# enabled.  The --hidden option is really for internal use only as it
-# means the USE flag we're checking is hidden expanded, so it won't be found
-# in IUSE like normal USE flags.
-#
-# Remember that this function isn't terribly intelligent so order of optional
-# flags matter.
-built_with_use() {
-	_eutils_eprefix_init
-	local hidden="no"
-	if [[ $1 == "--hidden" ]] ; then
-		hidden="yes"
-		shift
-	fi
-
-	local missing_action="die"
-	if [[ $1 == "--missing" ]] ; then
-		missing_action=$2
-		shift ; shift
-		case ${missing_action} in
-			true|false|die) ;;
-			*) die "unknown action '${missing_action}'";;
-		esac
-	fi
-
-	local opt=$1
-	[[ ${opt:0:1} = "-" ]] && shift || opt="-a"
-
-	local PKG=$(best_version $1)
-	[[ -z ${PKG} ]] && die "Unable to resolve $1 to an installed package"
-	shift
-
-	local USEFILE=${EROOT}/var/db/pkg/${PKG}/USE
-	local IUSEFILE=${EROOT}/var/db/pkg/${PKG}/IUSE
-
-	# if the IUSE file doesn't exist, the read will error out, we need to handle
-	# this gracefully
-	if [[ ! -e ${USEFILE} ]] || [[ ! -e ${IUSEFILE} && ${hidden} == "no" ]] ; then
-		case ${missing_action} in
-			true)	return 0;;
-			false)	return 1;;
-			die)	die "Unable to determine what USE flags $PKG was built with";;
-		esac
-	fi
-
-	if [[ ${hidden} == "no" ]] ; then
-		local IUSE_BUILT=( $(<"${IUSEFILE}") )
-		# Don't check USE_EXPAND #147237
-		local expand
-		for expand in $(echo ${USE_EXPAND} | tr '[:upper:]' '[:lower:]') ; do
-			if [[ $1 == ${expand}_* ]] ; then
-				expand=""
-				break
-			fi
-		done
-		if [[ -n ${expand} ]] ; then
-			if ! has $1 ${IUSE_BUILT[@]#[-+]} ; then
-				case ${missing_action} in
-					true)  return 0;;
-					false) return 1;;
-					die)   die "$PKG does not actually support the $1 USE flag!";;
-				esac
-			fi
-		fi
-	fi
-
-	local USE_BUILT=$(<${USEFILE})
-	while [[ $# -gt 0 ]] ; do
-		if [[ ${opt} = "-o" ]] ; then
-			has $1 ${USE_BUILT} && return 0
-		else
-			has $1 ${USE_BUILT} || return 1
-		fi
-		shift
-	done
-	[[ ${opt} = "-a" ]]
-}
-
-# @FUNCTION: epunt_cxx
-# @USAGE: [dir to scan]
-# @DESCRIPTION:
-# Many configure scripts wrongly bail when a C++ compiler could not be
-# detected.  If dir is not specified, then it defaults to ${S}.
-#
-# http://bugs.gentoo.org/73450
-epunt_cxx() {
-	local dir=$1
-	[[ -z ${dir} ]] && dir=${S}
-	ebegin "Removing useless C++ checks"
-	local f p any_found
-	while IFS= read -r -d '' f; do
-		for p in "${PORTDIR}"/eclass/ELT-patches/nocxx/*.patch ; do
-			if patch --no-backup-if-mismatch -p1 "${f}" "${p}" >/dev/null ; then
-				any_found=1
-				break
-			fi
-		done
-	done < <(find "${dir}" -name configure -print0)
-
-	if [[ -z ${any_found} ]]; then
-		eqawarn "epunt_cxx called unnecessarily (no C++ checks to punt)."
-	fi
-	eend 0
-}
-
 # @FUNCTION: make_wrapper
 # @USAGE: <wrapper> <target> [chdir] [libpaths] [installpath]
 # @DESCRIPTION:
@@ -1414,13 +129,12 @@
 # first optionally setting LD_LIBRARY_PATH to the colon-delimited
 # libpaths followed by optionally changing directory to chdir.
 make_wrapper() {
-	_eutils_eprefix_init
 	local wrapper=$1 bin=$2 chdir=$3 libdir=$4 path=$5
 	local tmpwrapper=$(emktemp)
+	has "${EAPI:-0}" 0 1 2 && local EPREFIX=""
 
 	(
 	echo '#!/bin/sh'
-	[[ -n ${chdir} ]] && printf 'cd "%s"\n' "${EPREFIX}${chdir}"
 	if [[ -n ${libdir} ]] ; then
 		local var
 		if [[ ${CHOST} == *-darwin* ]] ; then
@@ -1436,14 +150,16 @@
 			fi
 		EOF
 	fi
+	[[ -n ${chdir} ]] && printf 'cd "%s" &&\n' "${EPREFIX}${chdir}"
 	# We don't want to quote ${bin} so that people can pass complex
 	# things as ${bin} ... "./someprog --args"
-	printf 'exec %s "$@"\n' "${bin/#\//${EPREFIX}\/}"
+	printf 'exec %s "$@"\n' "${bin/#\//${EPREFIX}/}"
 	) > "${tmpwrapper}"
 	chmod go+rx "${tmpwrapper}"
 
 	if [[ -n ${path} ]] ; then
 		(
+		exeopts -m 0755
 		exeinto "${path}"
 		newexe "${tmpwrapper}" "${wrapper}"
 		) || die
@@ -1452,50 +168,11 @@
 	fi
 }
 
-# @FUNCTION: path_exists
-# @USAGE: [-a|-o] <paths>
-# @DESCRIPTION:
-# Check if the specified paths exist.  Works for all types of paths
-# (files/dirs/etc...).  The -a and -o flags control the requirements
-# of the paths.  They correspond to "and" and "or" logic.  So the -a
-# flag means all the paths must exist while the -o flag means at least
-# one of the paths must exist.  The default behavior is "and".  If no
-# paths are specified, then the return value is "false".
 path_exists() {
-	local opt=$1
-	[[ ${opt} == -[ao] ]] && shift || opt="-a"
-
-	# no paths -> return false
-	# same behavior as: [[ -e "" ]]
-	[[ $# -eq 0 ]] && return 1
-
-	local p r=0
-	for p in "$@" ; do
-		[[ -e ${p} ]]
-		: $(( r += $? ))
-	done
-
-	case ${opt} in
-		-a) return $(( r != 0 )) ;;
-		-o) return $(( r == $# )) ;;
-	esac
-}
-
-# @FUNCTION: in_iuse
-# @USAGE: <flag>
-# @DESCRIPTION:
-# Determines whether the given flag is in IUSE. Strips IUSE default prefixes
-# as necessary.
-#
-# Note that this function should not be used in the global scope.
-in_iuse() {
-	debug-print-function ${FUNCNAME} "${@}"
-	[[ ${#} -eq 1 ]] || die "Invalid args to ${FUNCNAME}()"
-
-	local flag=${1}
-	local liuse=( ${IUSE} )
-
-	has "${flag}" "${liuse[@]#[+-]}"
+	eerror "path_exists has been removed.  Please see the following post"
+	eerror "for a replacement snippet:"
+	eerror "https://blogs.gentoo.org/mgorny/2018/08/09/inlining-path_exists/"
+	die "path_exists is banned"
 }
 
 # @FUNCTION: use_if_iuse
@@ -1509,6 +186,54 @@
 	use $1
 }
 
+# @FUNCTION: optfeature
+# @USAGE: <short description> <package atom to match> [other atoms]
+# @DESCRIPTION:
+# Print out a message suggesting an optional package (or packages)
+# not currently installed which provides the described functionality.
+#
+# The following snippet would suggest app-misc/foo for optional foo support,
+# app-misc/bar or app-misc/baz[bar] for optional bar support
+# and either both app-misc/a and app-misc/b or app-misc/c for alphabet support.
+# @CODE
+#	optfeature "foo support" app-misc/foo
+#	optfeature "bar support" app-misc/bar app-misc/baz[bar]
+#	optfeature "alphabet support" "app-misc/a app-misc/b" app-misc/c
+# @CODE
+optfeature() {
+	debug-print-function ${FUNCNAME} "$@"
+	local i j msg
+	local desc=$1
+	local flag=0
+	shift
+	for i; do
+		for j in ${i}; do
+			if has_version "${j}"; then
+				flag=1
+			else
+				flag=0
+				break
+			fi
+		done
+		if [[ ${flag} -eq 1 ]]; then
+			break
+		fi
+	done
+	if [[ ${flag} -eq 0 ]]; then
+		for i; do
+			msg=" "
+			for j in ${i}; do
+				msg+=" ${j} and"
+			done
+			msg="${msg:0: -4} for ${desc}"
+			elog "${msg}"
+		done
+	fi
+}
+
+case ${EAPI:-0} in
+0|1|2|3|4)
+
 # @FUNCTION: usex
 # @USAGE: <USE flag> [true output] [false output] [true suffix] [false suffix]
 # @DESCRIPTION:
@@ -1516,164 +241,24 @@
 # and use the package manager implementation when available (i.e. EAPI >= 5).
 # If USE flag is set, echo [true output][true suffix] (defaults to "yes"),
 # otherwise echo [false output][false suffix] (defaults to "no").
-if has "${EAPI:-0}" 0 1 2 3 4; then
-	usex() { use "$1" && echo "${2-yes}$4" || echo "${3-no}$5" ; } #382963
-fi
+usex() { use "$1" && echo "${2-yes}$4" || echo "${3-no}$5" ; } #382963
 
-# @FUNCTION: prune_libtool_files
-# @USAGE: [--all|--modules]
-# @DESCRIPTION:
-# Locate unnecessary libtool files (.la) and libtool static archives
-# (.a) and remove them from installation image.
-#
-# By default, .la files are removed whenever the static linkage can
-# either be performed using pkg-config or doesn't introduce additional
-# flags.
-#
-# If '--modules' argument is passed, .la files for modules (plugins) are
-# removed as well. This is usually useful when the package installs
-# plugins and the plugin loader does not use .la files.
-#
-# If '--all' argument is passed, all .la files are removed without
-# performing any heuristic on them. You shouldn't ever use that,
-# and instead report a bug in the algorithm instead.
-#
-# The .a files are only removed whenever corresponding .la files state
-# that they should not be linked to, i.e. whenever these files
-# correspond to plugins.
-#
-# Note: if your package installs both static libraries and .pc files
-# which use variable substitution for -l flags, you need to add
-# pkg-config to your DEPEND.
-prune_libtool_files() {
-	debug-print-function ${FUNCNAME} "$@"
+;;
+esac
 
-	local removing_all removing_modules opt
-	_eutils_eprefix_init
-	for opt; do
-		case "${opt}" in
-			--all)
-				removing_all=1
-				removing_modules=1
-				;;
-			--modules)
-				removing_modules=1
-				;;
-			*)
-				die "Invalid argument to ${FUNCNAME}(): ${opt}"
-		esac
-	done
-
-	local f
-	local queue=()
-	while IFS= read -r -d '' f; do # for all .la files
-		local archivefile=${f/%.la/.a}
-
-		# The following check is done by libtool itself.
-		# It helps us avoid removing random files which match '*.la',
-		# see bug #468380.
-		if ! sed -n -e '/^# Generated by .*libtool/q0;4q1' "${f}"; then
-			continue
-		fi
-
-		[[ ${f} != ${archivefile} ]] || die 'regex sanity check failed'
-		local reason pkgconfig_scanned
-		local snotlink=$(sed -n -e 's:^shouldnotlink=::p' "${f}")
-
-		if [[ ${snotlink} == yes ]]; then
-
-			# Remove static libs we're not supposed to link against.
-			if [[ -f ${archivefile} ]]; then
-				einfo "Removing unnecessary ${archivefile#${D%/}} (static plugin)"
-				queue+=( "${archivefile}" )
-			fi
-
-			# The .la file may be used by a module loader, so avoid removing it
-			# unless explicitly requested.
-			if [[ ${removing_modules} ]]; then
-				reason='module'
-			fi
-
-		else
-
-			# Remove .la files when:
-			# - user explicitly wants us to remove all .la files,
-			# - respective static archive doesn't exist,
-			# - they are covered by a .pc file already,
-			# - they don't provide any new information (no libs & no flags).
-
-			if [[ ${removing_all} ]]; then
-				reason='requested'
-			elif [[ ! -f ${archivefile} ]]; then
-				reason='no static archive'
-			elif [[ ! $(sed -nre \
-					"s/^(dependency_libs|inherited_linker_flags)='(.*)'$/\2/p" \
-					"${f}") ]]; then
-				reason='no libs & flags'
-			else
-				if [[ ! ${pkgconfig_scanned} ]]; then
-					# Create a list of all .pc-covered libs.
-					local pc_libs=()
-					if [[ ! ${removing_all} ]]; then
-						local pc
-						local tf=${T}/prune-lt-files.pc
-						local pkgconf=$(tc-getPKG_CONFIG)
-
-						while IFS= read -r -d '' pc; do # for all .pc files
-							local arg libs
-
-							# Use pkg-config if available (and works),
-							# fallback to sed.
-							if ${pkgconf} --exists "${pc}" &>/dev/null; then
-								sed -e '/^Requires:/d' "${pc}" > "${tf}"
-								libs=$(${pkgconf} --libs "${tf}")
-							else
-								libs=$(sed -ne 's/^Libs://p' "${pc}")
-							fi
-
-							for arg in ${libs}; do
-								if [[ ${arg} == -l* ]]; then
-									if [[ ${arg} == '*$*' ]]; then
-										eqawarn "${FUNCNAME}: variable substitution likely failed in ${pc}"
-										eqawarn "(arg: ${arg})"
-										eqawarn "Most likely, you need to add virtual/pkgconfig to DEPEND."
-									fi
-
-									pc_libs+=( lib${arg#-l}.la )
-								fi
-							done
-						done < <(find "${D}" -type f -name '*.pc' -print0)
-
-						rm -f "${tf}"
-					fi
-
-					pkgconfig_scanned=1
-				fi # pkgconfig_scanned
-
-				has "${f##*/}" "${pc_libs[@]}" && reason='covered by .pc'
-			fi # removal due to .pc
-
-		fi # shouldnotlink==no
-
-		if [[ ${reason} ]]; then
-			einfo "Removing unnecessary ${f#${D%/}} (${reason})"
-			queue+=( "${f}" )
-		fi
-	done < <(find "${ED}" -xtype f -name '*.la' -print0)
-
-	if [[ ${queue[@]} ]]; then
-		rm -f "${queue[@]}"
-	fi
-}
+case ${EAPI:-0} in
+0|1|2|3|4|5)
 
 # @FUNCTION: einstalldocs
 # @DESCRIPTION:
-# Install documentation using DOCS and HTML_DOCS.
+# Install documentation using DOCS and HTML_DOCS, in EAPIs that do not
+# provide this function.  When available (i.e., in EAPI 6 or later),
+# the package manager implementation should be used instead.
 #
 # If DOCS is declared and non-empty, all files listed in it are
-# installed. The files must exist, otherwise the function will fail.
-# In EAPI 4 and subsequent EAPIs DOCS may specify directories as well,
-# in other EAPIs using directories is unsupported.
+# installed.  The files must exist, otherwise the function will fail.
+# In EAPI 4 and 5, DOCS may specify directories as well; in earlier
+# EAPIs using directories is unsupported.
 #
 # If DOCS is not declared, the files matching patterns given
 # in the default EAPI implementation of src_install will be installed.
@@ -1727,51 +312,44 @@
 	return 0
 }
 
-check_license() { die "you no longer need this as portage supports ACCEPT_LICENSE itself"; }
-
-# @FUNCTION: optfeature
-# @USAGE: <short description> <package atom to match> [other atoms]
+# @FUNCTION: in_iuse
+# @USAGE: <flag>
 # @DESCRIPTION:
-# Print out a message suggesting an optional package (or packages) which
-# provide the described functionality
+# Determines whether the given flag is in IUSE.  Strips IUSE default
+# prefixes as necessary.  In EAPIs where it is available (i.e., EAPI 6
+# or later), the package manager implementation should be used instead.
 #
-# The following snippet would suggest app-misc/foo for optional foo support,
-# app-misc/bar or app-misc/baz[bar] for optional bar support
-# and either both app-misc/a and app-misc/b or app-misc/c for alphabet support.
-# @CODE
-#	optfeature "foo support" app-misc/foo
-#	optfeature "bar support" app-misc/bar app-misc/baz[bar]
-#	optfeature "alphabet support" "app-misc/a app-misc/b" app-misc/c
-# @CODE
-optfeature() {
-	debug-print-function ${FUNCNAME} "$@"
-	local i j msg
-	local desc=$1
-	local flag=0
-	shift
-	for i; do
-		for j in ${i}; do
-			if has_version "${j}"; then
-				flag=1
-			else
-				flag=0
-				break
-			fi
-		done
-		if [[ ${flag} -eq 1 ]]; then
-			break
-		fi
-	done
-	if [[ ${flag} -eq 0 ]]; then
-		for i; do
-			msg=" "
-			for j in ${i}; do
-				msg+=" ${j} and"
-			done
-			msg="${msg:0: -4} for ${desc}"
-			elog "${msg}"
-		done
-	fi
+# Note that this function must not be used in the global scope.
+in_iuse() {
+	debug-print-function ${FUNCNAME} "${@}"
+	[[ ${#} -eq 1 ]] || die "Invalid args to ${FUNCNAME}()"
+
+	local flag=${1}
+	local liuse=( ${IUSE} )
+
+	has "${flag}" "${liuse[@]#[+-]}"
 }
 
+;;
+esac
+
+case ${EAPI:-0} in
+0|1|2|3|4|5|6)
+
+# @FUNCTION: eqawarn
+# @USAGE: [message]
+# @DESCRIPTION:
+# Proxy to ewarn for package managers that don't provide eqawarn and use the PM
+# implementation if available. Reuses PORTAGE_ELOG_CLASSES as set by the dev
+# profile.
+if ! declare -F eqawarn >/dev/null ; then
+	eqawarn() {
+		has qa ${PORTAGE_ELOG_CLASSES} && ewarn "$@"
+		:
+	}
+fi
+
+;;
+esac
+
 fi
diff --git a/eclass/ltprune.eclass b/eclass/ltprune.eclass
index 6b3e939..d8e93b6 100644
--- a/eclass/ltprune.eclass
+++ b/eclass/ltprune.eclass
@@ -1,20 +1,28 @@
-# Copyright 1999-2017 Gentoo Foundation
+# Copyright 1999-2019 Gentoo Authors
 # Distributed under the terms of the GNU General Public License v2
 
 # @ECLASS: ltprune.eclass
 # @MAINTAINER:
 # MichaƂ Górny <mgorny@gentoo.org>
+# @SUPPORTED_EAPIS: 0 1 2 3 4 5 6
 # @BLURB: Smart .la file pruning
 # @DESCRIPTION:
 # A function to locate and remove unnecessary .la files.
 #
 # Discouraged. Whenever possible, please use much simpler:
 # @CODE
-# find "${D}" -name '*.la' -delete || die
+# find "${D}" -name '*.la' -type f -delete || die
 # @CODE
 
 if [[ -z ${_LTPRUNE_ECLASS} ]]; then
 
+case ${EAPI:-0} in
+	0|1|2|3|4|5|6)
+		;;
+	*)
+		die "${ECLASS}: banned in EAPI=${EAPI}; use 'find' instead";;
+esac
+
 inherit toolchain-funcs
 
 # @FUNCTION: prune_libtool_files