Note this is the Prefix keyword, not the Gentoo/BSD one.
x86-macos
x64-macos
m68k-mint
-x86-netbsd
sparc-solaris
sparc64-solaris
x64-solaris
IUSE_IMPLICIT="prefix prefix-guest"
USE_EXPAND_UNPREFIXED="ARCH"
USE_EXPAND_IMPLICIT="ARCH ELIBC KERNEL USERLAND"
-USE_EXPAND_VALUES_ARCH="alpha amd64 amd64-fbsd amd64-linux arm arm-linux arm64 hppa ia64 m68k m68k-mint mips nios2 ppc ppc64 ppc64-linux ppc-aix ppc-macos riscv s390 sh sparc sparc64-solaris sparc-fbsd sparc-solaris x64-cygwin x64-macos x64-solaris x86 x86-cygwin x86-fbsd x86-linux x86-macos x86-netbsd x86-solaris x86-winnt"
+USE_EXPAND_VALUES_ARCH="alpha amd64 amd64-fbsd amd64-linux arm arm-linux arm64 hppa ia64 m68k m68k-mint mips nios2 ppc ppc64 ppc64-linux ppc-aix ppc-macos riscv s390 sh sparc sparc64-solaris sparc-fbsd sparc-solaris x64-cygwin x64-macos x64-solaris x86 x86-cygwin x86-fbsd x86-linux x86-macos x86-solaris x86-winnt"
USE_EXPAND_VALUES_ELIBC="AIX bionic Cygwin Darwin DragonFly FreeBSD glibc HPUX Interix mingw mintlib musl NetBSD OpenBSD SunOS uclibc Winnt"
USE_EXPAND_VALUES_KERNEL="AIX Darwin FreeBSD freemint HPUX Interix linux NetBSD OpenBSD SunOS Winnt"
USE_EXPAND_VALUES_USERLAND="BSD GNU"
IUSE_IMPLICIT="prefix prefix-guest"
USE_EXPAND_UNPREFIXED="ARCH"
USE_EXPAND_IMPLICIT="ARCH ELIBC KERNEL USERLAND"
-USE_EXPAND_VALUES_ARCH="alpha amd64 amd64-fbsd amd64-linux arm arm-linux arm64 hppa ia64 m68k m68k-mint mips nios2 ppc ppc64 ppc64-linux ppc-aix ppc-macos riscv s390 sh sparc sparc64-solaris sparc-fbsd sparc-solaris x64-cygwin x64-macos x64-solaris x86 x86-cygwin x86-fbsd x86-linux x86-macos x86-netbsd x86-solaris x86-winnt"
+USE_EXPAND_VALUES_ARCH="alpha amd64 amd64-fbsd amd64-linux arm arm-linux arm64 hppa ia64 m68k m68k-mint mips nios2 ppc ppc64 ppc64-linux ppc-aix ppc-macos riscv s390 sh sparc sparc64-solaris sparc-fbsd sparc-solaris x64-cygwin x64-macos x64-solaris x86 x86-cygwin x86-fbsd x86-linux x86-macos x86-solaris x86-winnt"
USE_EXPAND_VALUES_ELIBC="AIX bionic Cygwin Darwin DragonFly FreeBSD glibc HPUX Interix mingw mintlib musl NetBSD OpenBSD SunOS uclibc Winnt"
USE_EXPAND_VALUES_KERNEL="AIX Darwin FreeBSD freemint HPUX Interix linux NetBSD OpenBSD SunOS Winnt"
USE_EXPAND_VALUES_USERLAND="BSD GNU"
+++ /dev/null
-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-ARCH="x86-netbsd"
-# we use *-netbsdelf* to avoid the need to patch binutils, gcc and co
-CHOST="i686-pc-netbsdelf4.0"
-ACCEPT_KEYWORDS="~x86-netbsd"
+++ /dev/null
-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-# System-wide defaults for all NetBSD profiles
-# This file should rarely need to be changed
-
-# 'Sane' defaults
-ELIBC="NetBSD"
-KERNEL="NetBSD"
+++ /dev/null
-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-# Re-add NetBSD OS
-kernel_NetBSD
-elibc_NetBSD
+++ /dev/null
-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-# Re-add NetBSD libc
--elibc_NetBSD
--kernel_NetBSD
-
+++ /dev/null
-# Copyright 1999-2014 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-# Michael Haubenwallner <haubi@gentoo.org> (30 Sep 2009)
-# *bsd do have a uuid implementation in libc (#230981).
-x11-libs/libSM -uuid
+++ /dev/null
-# Copyright 1999-2009 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-*sys-devel/binutils
-*sys-process/pidof-bsd
+++ /dev/null
-../../base
-..
+++ /dev/null
-# Copyright 1999-2017 Gentoo Foundation
-# Distributed under the terms of the GNU General Public License v2
-# $Id$
-
-# these will more than likely never work on bsd
-3dfx
-acpi
-alsa
-apm
-caps
-cman
-clvm
-directfb
-djbfft
-fbcon
-fmod
-ggi
-gpm
-hardened
-svga
-sybase
-sybase-ct
-rtc
-uclibc
-v4l
x86-cygwin prefix/windows/cygwin/x86 exp
x64-cygwin prefix/windows/cygwin/x64 exp
-# NetBSD Profiles
-x86-netbsd prefix/bsd/netbsd/4.0/x86 exp
-
# FreeMiNT
m68k-mint prefix/mint/m68k exp