multilib-build: remove eclass from portable-stable

We moved it to eclass-overlay so that we can modify it.

BUG=b:139030617
TEST=CQ

Cq-Depend: chromium:1753242
Change-Id: Ic528c83663b6b6befbc6b5a602613d7d697ce6fd
Reviewed-on: https://chromium-review.googlesource.com/1757403
Tested-by: Nicolas Boichat <drinkcat@chromium.org>
Commit-Ready: ChromeOS CL Exonerator Bot <chromiumos-cl-exonerator@appspot.gserviceaccount.com>
Legacy-Commit-Queue: Commit Bot <commit-bot@chromium.org>
Reviewed-by: Mike Frysinger <vapier@chromium.org>
diff --git a/eclass/multilib-build.eclass b/eclass/multilib-build.eclass
deleted file mode 100644
index 05917ba..0000000
--- a/eclass/multilib-build.eclass
+++ /dev/null
@@ -1,673 +0,0 @@
-# Copyright 1999-2018 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-
-# @ECLASS: multilib-build.eclass
-# @MAINTAINER:
-# gx86-multilib team <multilib@gentoo.org>
-# @AUTHOR:
-# Author: MichaƂ Górny <mgorny@gentoo.org>
-# @SUPPORTED_EAPIS: 4 5 6 7
-# @BLURB: flags and utility functions for building multilib packages
-# @DESCRIPTION:
-# The multilib-build.eclass exports USE flags and utility functions
-# necessary to build packages for multilib in a clean and uniform
-# manner.
-#
-# Please note that dependency specifications for multilib-capable
-# dependencies shall use the USE dependency string in ${MULTILIB_USEDEP}
-# to properly request multilib enabled.
-
-if [[ ! ${_MULTILIB_BUILD} ]]; then
-
-# EAPI=4 is required for meaningful MULTILIB_USEDEP.
-case ${EAPI:-0} in
-	4|5|6|7) ;;
-	*) die "EAPI=${EAPI} is not supported" ;;
-esac
-
-[[ ${EAPI} == [45] ]] && inherit eutils
-inherit multibuild multilib
-
-# @ECLASS-VARIABLE: _MULTILIB_FLAGS
-# @INTERNAL
-# @DESCRIPTION:
-# The list of multilib flags and corresponding ABI values. If the same
-# flag is reused for multiple ABIs (e.g. x86 on Linux&FreeBSD), multiple
-# ABIs may be separated by commas.
-#
-# Please contact multilib before modifying this list. This way we can
-# ensure that every *preliminary* work is done and the multilib can be
-# extended safely.
-_MULTILIB_FLAGS=(
-	abi_x86_32:x86,x86_fbsd,x86_freebsd,x86_linux,x86_macos,x86_solaris
-	abi_x86_64:amd64,amd64_fbsd,x64_freebsd,amd64_linux,x64_macos,x64_solaris
-	abi_x86_x32:x32
-	abi_mips_n32:n32
-	abi_mips_n64:n64
-	abi_mips_o32:o32
-	abi_ppc_32:ppc,ppc_aix,ppc_macos
-	abi_ppc_64:ppc64
-	abi_s390_32:s390
-	abi_s390_64:s390x
-)
-readonly _MULTILIB_FLAGS
-
-# @ECLASS-VARIABLE: MULTILIB_COMPAT
-# @DEFAULT_UNSET
-# @DESCRIPTION:
-# List of multilib ABIs supported by the ebuild. If unset, defaults to
-# all ABIs supported by the eclass.
-#
-# This variable is intended for use in prebuilt multilib packages that
-# can provide binaries only for a limited set of ABIs. If ABIs need to
-# be limited due to a bug in source code, package.use.mask is to be used
-# instead. Along with MULTILIB_COMPAT, KEYWORDS should contain '-*'.
-#
-# Note that setting this variable effectively disables support for all
-# other ABIs, including other architectures. For example, specifying
-# abi_x86_{32,64} disables support for MIPS as well.
-#
-# The value of MULTILIB_COMPAT determines the value of IUSE. If set, it
-# also enables REQUIRED_USE constraints.
-#
-# Example use:
-# @CODE
-# # Upstream provides binaries for x86 & amd64 only
-# MULTILIB_COMPAT=( abi_x86_{32,64} )
-# @CODE
-
-# @ECLASS-VARIABLE: MULTILIB_USEDEP
-# @DESCRIPTION:
-# The USE-dependency to be used on dependencies (libraries) needing
-# to support multilib as well.
-#
-# Example use:
-# @CODE
-# RDEPEND="dev-libs/libfoo[${MULTILIB_USEDEP}]
-#	net-libs/libbar[ssl,${MULTILIB_USEDEP}]"
-# @CODE
-
-# @ECLASS-VARIABLE: MULTILIB_ABI_FLAG
-# @DEFAULT_UNSET
-# @DESCRIPTION:
-# The complete ABI name. Resembles the USE flag name.
-#
-# This is set within multilib_foreach_abi(),
-# multilib_parallel_foreach_abi() and multilib-minimal sub-phase
-# functions.
-#
-# It may be null (empty) when the build is done on ABI not controlled
-# by a USE flag (e.g. on non-multilib arch or when using multilib
-# portage). The build will always be done for a single ABI then.
-#
-# Example value:
-# @CODE
-# abi_x86_64
-# @CODE
-
-_multilib_build_set_globals() {
-	local flags=( "${_MULTILIB_FLAGS[@]%:*}" )
-
-	if [[ ${MULTILIB_COMPAT[@]} ]]; then
-		# Validate MULTILIB_COMPAT and filter out the flags.
-		local f
-		for f in "${MULTILIB_COMPAT[@]}"; do
-			if ! has "${f}" "${flags[@]}"; then
-				die "Invalid value in MULTILIB_COMPAT: ${f}"
-			fi
-		done
-
-		flags=( "${MULTILIB_COMPAT[@]}" )
-
-		REQUIRED_USE="|| ( ${flags[*]} )"
-	fi
-
-	local usedeps=${flags[@]/%/(-)?}
-
-	IUSE=${flags[*]}
-	MULTILIB_USEDEP=${usedeps// /,}
-	readonly MULTILIB_USEDEP
-}
-_multilib_build_set_globals
-unset -f _multilib_build_set_globals
-
-# @FUNCTION: multilib_get_enabled_abis
-# @DESCRIPTION:
-# Return the ordered list of enabled ABIs if multilib builds
-# are enabled. The best (most preferred) ABI will come last.
-#
-# If multilib is disabled, the default ABI will be returned
-# in order to enforce consistent testing with multilib code.
-multilib_get_enabled_abis() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	local pairs=( $(multilib_get_enabled_abi_pairs) )
-	echo "${pairs[@]#*.}"
-}
-
-# @FUNCTION: multilib_get_enabled_abi_pairs
-# @DESCRIPTION:
-# Return the ordered list of enabled <use-flag>.<ABI> pairs
-# if multilib builds are enabled. The best (most preferred)
-# ABI will come last.
-#
-# If multilib is disabled, the default ABI will be returned
-# along with empty <use-flag>.
-multilib_get_enabled_abi_pairs() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	local abis=( $(get_all_abis) )
-
-	local abi i found
-	for abi in "${abis[@]}"; do
-		for i in "${_MULTILIB_FLAGS[@]}"; do
-			local m_abis=${i#*:} m_abi
-			local m_flag=${i%:*}
-
-			# split on ,; we can't switch IFS for function scope because
-			# paludis is broken (bug #486592), and switching it locally
-			# for the split is more complex than cheating like this
-			for m_abi in ${m_abis//,/ }; do
-				if [[ ${m_abi} == ${abi} ]] \
-					&& { [[ ! "${MULTILIB_COMPAT[@]}" ]] || has "${m_flag}" "${MULTILIB_COMPAT[@]}"; } \
-					&& use "${m_flag}"
-				then
-					echo "${m_flag}.${abi}"
-					found=1
-					break 2
-				fi
-			done
-		done
-	done
-
-	if [[ ! ${found} ]]; then
-		# ${ABI} can be used to override the fallback (multilib-portage),
-		# ${DEFAULT_ABI} is the safe fallback.
-		local abi=${ABI:-${DEFAULT_ABI}}
-
-		debug-print "${FUNCNAME}: no ABIs enabled, fallback to ${abi}"
-		debug-print "${FUNCNAME}: ABI=${ABI}, DEFAULT_ABI=${DEFAULT_ABI}"
-		echo ".${abi}"
-	fi
-}
-
-# @FUNCTION: _multilib_multibuild_wrapper
-# @USAGE: <argv>...
-# @INTERNAL
-# @DESCRIPTION:
-# Initialize the environment for ABI selected for multibuild.
-_multilib_multibuild_wrapper() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	local ABI=${MULTIBUILD_VARIANT#*.}
-	local -r MULTILIB_ABI_FLAG=${MULTIBUILD_VARIANT%.*}
-
-	multilib_toolchain_setup "${ABI}"
-	readonly ABI
-	"${@}"
-}
-
-# @FUNCTION: multilib_foreach_abi
-# @USAGE: <argv>...
-# @DESCRIPTION:
-# If multilib support is enabled, sets the toolchain up for each
-# supported ABI along with the ABI variable and correct BUILD_DIR,
-# and runs the given commands with them.
-#
-# If multilib support is disabled, it just runs the commands. No setup
-# is done.
-multilib_foreach_abi() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
-	multibuild_foreach_variant _multilib_multibuild_wrapper "${@}"
-}
-
-# @FUNCTION: multilib_parallel_foreach_abi
-# @USAGE: <argv>...
-# @DESCRIPTION:
-# If multilib support is enabled, sets the toolchain up for each
-# supported ABI along with the ABI variable and correct BUILD_DIR,
-# and runs the given commands with them.
-#
-# If multilib support is disabled, it just runs the commands. No setup
-# is done.
-#
-# This function used to run multiple commands in parallel. Now it's just
-# a deprecated alias to multilib_foreach_abi.
-multilib_parallel_foreach_abi() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
-	multibuild_foreach_variant _multilib_multibuild_wrapper "${@}"
-}
-
-# @FUNCTION: multilib_for_best_abi
-# @USAGE: <argv>...
-# @DESCRIPTION:
-# Runs the given command with setup for the 'best' (usually native) ABI.
-multilib_for_best_abi() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${EAPI} == [45] ]] || die "${FUNCNAME} is banned in EAPI ${EAPI}, use multilib_is_native_abi() instead"
-
-	eqawarn "QA warning: multilib_for_best_abi() function is deprecated and should"
-	eqawarn "not be used. The multilib_is_native_abi() check may be used instead."
-
-	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
-
-	multibuild_for_best_variant _multilib_multibuild_wrapper "${@}"
-}
-
-# @FUNCTION: multilib_check_headers
-# @DESCRIPTION:
-# Check whether the header files are consistent between ABIs.
-#
-# This function needs to be called after each ABI's installation phase.
-# It obtains the header file checksums and compares them with previous
-# runs (if any). Dies if header files differ.
-multilib_check_headers() {
-	_multilib_header_cksum() {
-		set -o pipefail
-
-		if [[ -d ${ED%/}/usr/include ]]; then
-			find "${ED%/}"/usr/include -type f \
-				-exec cksum {} + | sort -k2
-		fi
-	}
-
-	local cksum cksum_prev
-	local cksum_file=${T}/.multilib_header_cksum
-	cksum=$(_multilib_header_cksum) || die
-	unset -f _multilib_header_cksum
-
-	if [[ -f ${cksum_file} ]]; then
-		cksum_prev=$(< "${cksum_file}") || die
-
-		if [[ ${cksum} != ${cksum_prev} ]]; then
-			echo "${cksum}" > "${cksum_file}.new" || die
-
-			eerror "Header files have changed between ABIs."
-
-			if type -p diff &>/dev/null; then
-				eerror "$(diff -du "${cksum_file}" "${cksum_file}.new")"
-			else
-				eerror "Old checksums in: ${cksum_file}"
-				eerror "New checksums in: ${cksum_file}.new"
-			fi
-
-			die "Header checksum mismatch, aborting."
-		fi
-	else
-		echo "${cksum}" > "${cksum_file}" || die
-	fi
-}
-
-# @FUNCTION: multilib_copy_sources
-# @DESCRIPTION:
-# Create a single copy of the package sources for each enabled ABI.
-#
-# The sources are always copied from initial BUILD_DIR (or S if unset)
-# to ABI-specific build directory matching BUILD_DIR used by
-# multilib_foreach_abi().
-multilib_copy_sources() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	local MULTIBUILD_VARIANTS=( $(multilib_get_enabled_abi_pairs) )
-	multibuild_copy_sources
-}
-
-# @ECLASS-VARIABLE: MULTILIB_WRAPPED_HEADERS
-# @DESCRIPTION:
-# A list of headers to wrap for multilib support. The listed headers
-# will be moved to a non-standard location and replaced with a file
-# including them conditionally to current ABI.
-#
-# This variable has to be a bash array. Paths shall be relative to
-# installation root (${ED}), and name regular files. Recursive wrapping
-# is not supported.
-#
-# Please note that header wrapping is *discouraged*. It is preferred to
-# install all headers in a subdirectory of libdir and use pkg-config to
-# locate the headers. Some C preprocessors will not work with wrapped
-# headers.
-#
-# Example:
-# @CODE
-# MULTILIB_WRAPPED_HEADERS=(
-#	/usr/include/foobar/config.h
-# )
-# @CODE
-
-# @ECLASS-VARIABLE: MULTILIB_CHOST_TOOLS
-# @DESCRIPTION:
-# A list of tool executables to preserve for each multilib ABI.
-# The listed executables will be renamed to ${CHOST}-${basename},
-# and the native variant will be symlinked to the generic name.
-#
-# This variable has to be a bash array. Paths shall be relative to
-# installation root (${ED}), and name regular files or symbolic
-# links to regular files. Recursive wrapping is not supported.
-#
-# If symbolic link is passed, both symlink path and symlink target
-# will be changed. As a result, the symlink target is expected
-# to be wrapped as well (either by listing in MULTILIB_CHOST_TOOLS
-# or externally).
-#
-# Please note that tool wrapping is *discouraged*. It is preferred to
-# install pkg-config files for each ABI, and require reverse
-# dependencies to use that.
-#
-# Packages that search for tools properly (e.g. using AC_PATH_TOOL
-# macro) will find the wrapper executables automatically. Other packages
-# will need explicit override of tool paths.
-#
-# Example:
-# @CODE
-# MULTILIB_CHOST_TOOLS=(
-#	/usr/bin/foo-config
-# )
-
-# @CODE
-# @FUNCTION: multilib_prepare_wrappers
-# @USAGE: [<install-root>]
-# @DESCRIPTION:
-# Perform the preparation of all kinds of wrappers for the current ABI.
-# This function shall be called once per each ABI, after installing
-# the files to be wrapped.
-#
-# Takes an optional custom <install-root> from which files will be
-# used. If no root is specified, uses ${ED}.
-#
-# The files to be wrapped are specified using separate variables,
-# e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
-# between the successive calls to multilib_prepare_wrappers
-# and multilib_install_wrappers.
-#
-# After all wrappers are prepared, multilib_install_wrappers shall
-# be called to commit them to the installation tree.
-multilib_prepare_wrappers() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"
-
-	local root=${1:-${ED%/}}
-	local f
-
-	if [[ ${COMPLETE_MULTILIB} == yes ]]; then
-		# symlink '${CHOST}-foo -> foo' to support abi-wrapper while
-		# keeping ${CHOST}-foo calls correct.
-
-		for f in "${MULTILIB_CHOST_TOOLS[@]}"; do
-			# drop leading slash if it's there
-			f=${f#/}
-
-			local dir=${f%/*}
-			local fn=${f##*/}
-
-			ln -s "${fn}" "${root}/${dir}/${CHOST}-${fn}" || die
-		done
-
-		return
-	fi
-
-	for f in "${MULTILIB_CHOST_TOOLS[@]}"; do
-		# drop leading slash if it's there
-		f=${f#/}
-
-		local dir=${f%/*}
-		local fn=${f##*/}
-
-		if [[ -L ${root}/${f} ]]; then
-			# rewrite the symlink target
-			local target
-			target=$(readlink "${root}/${f}") || die
-			local target_dir target_fn=${target##*/}
-
-			[[ ${target} == */* ]] && target_dir=${target%/*}
-
-			ln -f -s "${target_dir+${target_dir}/}${CHOST}-${target_fn}" \
-				"${root}/${f}" || die
-		fi
-
-		mv "${root}/${f}" "${root}/${dir}/${CHOST}-${fn}" || die
-
-		# symlink the native one back
-		if multilib_is_native_abi; then
-			ln -s "${CHOST}-${fn}" "${root}/${f}" || die
-		fi
-	done
-
-	if [[ ${MULTILIB_WRAPPED_HEADERS[@]} ]]; then
-		# If abi_flag is unset, then header wrapping is unsupported on
-		# this ABI. This means the arch doesn't support multilib at all
-		# -- in this case, the headers are not wrapped and everything
-		# works as expected.
-
-		if [[ ${MULTILIB_ABI_FLAG} ]]; then
-			for f in "${MULTILIB_WRAPPED_HEADERS[@]}"; do
-				# drop leading slash if it's there
-				f=${f#/}
-
-				if [[ ${f} != usr/include/* ]]; then
-					die "Wrapping headers outside of /usr/include is not supported at the moment."
-				fi
-				# and then usr/include
-				f=${f#usr/include}
-
-				local dir=${f%/*}
-
-				# Some ABIs may have install less files than others.
-				if [[ -f ${root}/usr/include${f} ]]; then
-					local wrapper=${ED%/}/tmp/multilib-include${f}
-
-					if [[ ! -f ${ED%/}/tmp/multilib-include${f} ]]; then
-						dodir "/tmp/multilib-include${dir}"
-						# a generic template
-						cat > "${wrapper}" <<_EOF_ || die
-/* This file is auto-generated by multilib-build.eclass
- * as a multilib-friendly wrapper. For the original content,
- * please see the files that are #included below.
- */
-
-#if defined(__x86_64__) /* amd64 */
-#	if defined(__ILP32__) /* x32 ABI */
-#		error "abi_x86_x32 not supported by the package."
-#	else /* 64-bit ABI */
-#		error "abi_x86_64 not supported by the package."
-#	endif
-#elif defined(__i386__) /* plain x86 */
-#	error "abi_x86_32 not supported by the package."
-#elif defined(__mips__)
-#   if(_MIPS_SIM == _ABIN32) /* n32 */
-#       error "abi_mips_n32 not supported by the package."
-#   elif(_MIPS_SIM == _ABI64) /* n64 */
-#       error "abi_mips_n64 not supported by the package."
-#   elif(_MIPS_SIM == _ABIO32) /* o32 */
-#       error "abi_mips_o32 not supported by the package."
-#   endif
-#elif defined(__sparc__)
-#	if defined(__arch64__)
-#       error "abi_sparc_64 not supported by the package."
-#	else
-#       error "abi_sparc_32 not supported by the package."
-#	endif
-#elif defined(__s390__)
-#	if defined(__s390x__)
-#       error "abi_s390_64 not supported by the package."
-#	else
-#       error "abi_s390_32 not supported by the package."
-#	endif
-#elif defined(__powerpc__) || defined(__ppc__)
-#	if defined(__powerpc64__) || defined(__ppc64__)
-#       error "abi_ppc_64 not supported by the package."
-#	else
-#       error "abi_ppc_32 not supported by the package."
-#	endif
-#elif defined(SWIG) /* https://sourceforge.net/p/swig/bugs/799/ */
-#	error "Native ABI not supported by the package."
-#else
-#	error "No ABI matched, please report a bug to bugs.gentoo.org"
-#endif
-_EOF_
-					fi
-
-					if ! grep -q "${MULTILIB_ABI_FLAG} " "${wrapper}"
-					then
-						die "Flag ${MULTILIB_ABI_FLAG} not listed in wrapper template. Please report a bug to https://bugs.gentoo.org."
-					fi
-
-					# $CHOST shall be set by multilib_toolchain_setup
-					dodir "/tmp/multilib-include/${CHOST}${dir}"
-					mv "${root}/usr/include${f}" "${ED%/}/tmp/multilib-include/${CHOST}${dir}/" || die
-
-					# Note: match a space afterwards to avoid collision potential.
-					sed -e "/${MULTILIB_ABI_FLAG} /s&error.*&include <${CHOST}${f}>&" \
-						-i "${wrapper}" || die
-
-					# Needed for swig.
-					if multilib_is_native_abi; then
-						sed -e "/Native ABI/s&error.*&include <${CHOST}${f}>&" \
-							-i "${wrapper}" || die
-					fi
-				fi
-			done
-		fi
-	fi
-}
-
-# @FUNCTION: multilib_install_wrappers
-# @USAGE: [<install-root>]
-# @DESCRIPTION:
-# Install the previously-prepared wrappers. This function shall
-# be called once, after all wrappers were prepared.
-#
-# Takes an optional custom <install-root> to which the wrappers will be
-# installed. If no root is specified, uses ${ED}. There is no need to
-# use the same root as when preparing the wrappers.
-#
-# The files to be wrapped are specified using separate variables,
-# e.g. MULTILIB_WRAPPED_HEADERS. Those variables shall not be changed
-# between the calls to multilib_prepare_wrappers
-# and multilib_install_wrappers.
-multilib_install_wrappers() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${#} -le 1 ]] || die "${FUNCNAME}: too many arguments"
-
-	[[ ${COMPLETE_MULTILIB} == yes ]] && return
-
-	local root=${1:-${ED}}
-
-	if [[ -d ${ED%/}/tmp/multilib-include ]]; then
-		multibuild_merge_root \
-			"${ED%/}"/tmp/multilib-include "${root}"/usr/include
-		# it can fail if something else uses /tmp
-		rmdir "${ED%/}"/tmp &>/dev/null
-	fi
-}
-
-# @FUNCTION: multilib_is_native_abi
-# @DESCRIPTION:
-# Determine whether the currently built ABI is the profile native.
-# Return true status (0) if that is true, otherwise false (1).
-multilib_is_native_abi() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${#} -eq 0 ]] || die "${FUNCNAME}: too many arguments"
-
-	[[ ${COMPLETE_MULTILIB} == yes || ${ABI} == ${DEFAULT_ABI} ]]
-}
-
-# @FUNCTION: multilib_build_binaries
-# @DESCRIPTION:
-# Deprecated synonym for multilib_is_native_abi
-multilib_build_binaries() {
-	debug-print-function ${FUNCNAME} "${@}"
-
-	[[ ${EAPI} == [45] ]] || die "${FUNCNAME} is banned in EAPI ${EAPI}, use multilib_is_native_abi() instead"
-
-	eqawarn "QA warning: multilib_build_binaries is deprecated. Please use the equivalent"
-	eqawarn "multilib_is_native_abi function instead."
-
-	multilib_is_native_abi "${@}"
-}
-
-# @FUNCTION: multilib_native_use_with
-# @USAGE: <flag> [<opt-name> [<opt-value>]]
-# @DESCRIPTION:
-# Output --with configure option alike use_with if USE <flag> is enabled
-# and executables are being built (multilib_is_native_abi is true).
-# Otherwise, outputs --without configure option. Arguments are the same
-# as for use_with in the EAPI.
-multilib_native_use_with() {
-	if multilib_is_native_abi; then
-		use_with "${@}"
-	else
-		echo "--without-${2:-${1}}"
-	fi
-}
-
-# @FUNCTION: multilib_native_use_enable
-# @USAGE: <flag> [<opt-name> [<opt-value>]]
-# @DESCRIPTION:
-# Output --enable configure option alike use_enable if USE <flag>
-# is enabled and executables are being built (multilib_is_native_abi
-# is true). Otherwise, outputs --disable configure option. Arguments are
-# the same as for use_enable in the EAPI.
-multilib_native_use_enable() {
-	if multilib_is_native_abi; then
-		use_enable "${@}"
-	else
-		echo "--disable-${2:-${1}}"
-	fi
-}
-
-# @FUNCTION: multilib_native_enable
-# @USAGE: <opt-name> [<opt-value>]
-# @DESCRIPTION:
-# Output --enable configure option if executables are being built
-# (multilib_is_native_abi is true). Otherwise, output --disable configure
-# option.
-multilib_native_enable() {
-	if multilib_is_native_abi; then
-		echo "--enable-${1}${2+=${2}}"
-	else
-		echo "--disable-${1}"
-	fi
-}
-
-# @FUNCTION: multilib_native_with
-# @USAGE: <opt-name> [<opt-value>]
-# @DESCRIPTION:
-# Output --with configure option if executables are being built
-# (multilib_is_native_abi is true). Otherwise, output --without configure
-# option.
-multilib_native_with() {
-	if multilib_is_native_abi; then
-		echo "--with-${1}${2+=${2}}"
-	else
-		echo "--without-${1}"
-	fi
-}
-
-# @FUNCTION: multilib_native_usex
-# @USAGE: <flag> [<true1> [<false1> [<true2> [<false2>]]]]
-# @DESCRIPTION:
-# Output the concatenation of <true1> (or 'yes' if unspecified)
-# and <true2> if USE <flag> is enabled and executables are being built
-# (multilib_is_native_abi is true). Otherwise, output the concatenation
-# of <false1> (or 'no' if unspecified) and <false2>. Arguments
-# are the same as for usex in the EAPI.
-#
-# Note: in EAPI 4 you need to inherit eutils to use this function.
-multilib_native_usex() {
-	if multilib_is_native_abi; then
-		usex "${@}"
-	else
-		echo "${3-no}${5}"
-	fi
-}
-
-_MULTILIB_BUILD=1
-fi