#! /bin/sh
# Configuration validation subroutine script.
#   Copyright 1992-2025 Free Software Foundation, Inc.

# shellcheck disable=SC2006,SC2268,SC2162 # see below for rationale

timestamp='2025-07-10'

# This file is free software; you can redistribute it and/or modify it
# under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# This program is distributed in the hope that it will be useful, but
# WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
# General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, see <https://www.gnu.org/licenses/>.
#
# As a special exception to the GNU General Public License, if you
# distribute this file as part of a program that contains a
# configuration script generated by Autoconf, you may include it under
# the same distribution terms that you use for the rest of that
# program.  This Exception is an additional permission under section 7
# of the GNU General Public License, version 3 ("GPLv3").


# Please send patches to <config-patches@gnu.org>.
#
# Configuration subroutine to validate and canonicalize a configuration type.
# Supply the specified configuration type as an argument.
# If it is invalid, we print an error message on stderr and exit with code 1.
# Otherwise, we print the canonical config type on stdout and succeed.

# You can get the latest version of this script from:
# https://git.savannah.gnu.org/cgit/config.git/plain/config.sub

# This file is supposed to be the same for all GNU packages
# and recognize all the CPU types, system types and aliases
# that are meaningful with *any* GNU software.
# Each package is responsible for reporting which valid configurations
# it does not support.  The user should be able to distinguish
# a failure to support a valid configuration from a meaningless
# configuration.

# The goal of this file is to map all the various variations of a given
# machine specification into a single specification in the form:
#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
# or in some cases, the newer four-part form:
#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
# It is wrong to echo any other type of specification.

# The "shellcheck disable" line above the timestamp inhibits complaints
# about features and limitations of the classic Bourne shell that were
# superseded or lifted in POSIX.  However, this script identifies a wide
# variety of pre-POSIX systems that do not have POSIX shells at all, and
# even some reasonably current systems (Solaris 10 as case-in-point) still
# have a pre-POSIX /bin/sh.

me=`echo "$0" | sed -e 's,.*/,,'`

usage="\
Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS

Canonicalize a configuration name.

Options:
  -h, --help         print this help, then exit
  -t, --time-stamp   print date of last modification, then exit
  -v, --version      print version number, then exit

Report bugs and patches to <config-patches@gnu.org>."

version="\
GNU config.sub ($timestamp)

Copyright 1992-2025 Free Software Foundation, Inc.

This is free software; see the source for copying conditions.  There is NO
warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."

help="
Try '$me --help' for more information."

# Parse command line
while test $# -gt 0 ; do
  case $1 in
    --time-stamp | --time* | -t )
       echo "$timestamp" ; exit ;;
    --version | -v )
       echo "$version" ; exit ;;
    --help | --h* | -h )
       echo "$usage"; exit ;;
    -- )     # Stop option processing
       shift; break ;;
    - )	# Use stdin as input.
       break ;;
    -* )
       echo "$me: invalid option $1$help" >&2
       exit 1 ;;

    *local*)
       # First pass through any local machine types.
       echo "$1"
       exit ;;

    * )
       break ;;
  esac
done

case $# in
 0) echo "$me: missing argument$help" >&2
    exit 1;;
 1) ;;
 *) echo "$me: too many arguments$help" >&2
    exit 1;;
esac

# Split fields of configuration type
saved_IFS=$IFS
IFS="-" read field1 field2 field3 field4 <<EOF
$1
EOF
IFS=$saved_IFS

# Separate into logical components for further validation
case $1 in
	*-*-*-*-*)
		echo "Invalid configuration '$1': more than four components" >&2
		exit 1
		;;
	*-*-*-*)
		basic_machine=$field1-$field2
		basic_os=$field3-$field4
		;;
	*-*-*)
		# Ambiguous whether COMPANY is present, or skipped and KERNEL-OS is two
		# parts
		maybe_os=$field2-$field3
		case $maybe_os in
			  cloudabi*-eabi* \
			| kfreebsd*-gnu* \
			| knetbsd*-gnu* \
			| kopensolaris*-gnu* \
			| ironclad-* \
			| linux-* \
			| managarm-* \
			| netbsd*-eabi* \
			| netbsd*-gnu* \
			| nto-qnx* \
			| os2-emx* \
			| rtmk-nova* \
			| storm-chaos* \
			| uclinux-gnu* \
			| uclinux-uclibc* \
			| windows-* )
				basic_machine=$field1
				basic_os=$maybe_os
				;;
			android-linux)
				basic_machine=$field1-unknown
				basic_os=linux-android
				;;
			*)
				basic_machine=$field1-$field2
				basic_os=$field3
				;;
		esac
		;;
	*-*)
		case $field1-$field2 in
			# Shorthands that happen to contain a single dash
			convex-c[12] | convex-c3[248])
				basic_machine=$field2-convex
				basic_os=
				;;
			decstation-3100)
				basic_machine=mips-dec
				basic_os=
				;;
			*-*)
				# Second component is usually, but not always the OS
				case $field2 in
					# Do not treat sunos as a manufacturer
					sun*os*)
						basic_machine=$field1
						basic_os=$field2
						;;
					# Manufacturers
					  3100* \
					| 32* \
					| 3300* \
					| 3600* \
					| 7300* \
					| acorn \
					| altos* \
					| apollo \
					| apple \
					| atari \
					| att* \
					| axis \
					| be \
					| bull \
					| cbm \
					| ccur \
					| cisco \
					| commodore \
					| convergent* \
					| convex* \
					| cray \
					| crds \
					| dec* \
					| delta* \
					| dg \
					| digital \
					| dolphin \
					| encore* \
					| gould \
					| harris \
					| highlevel \
					| hitachi* \
					| hp \
					| ibm* \
					| intergraph \
					| isi* \
					| knuth \
					| masscomp \
					| microblaze* \
					| mips* \
					| motorola* \
					| ncr* \
					| news \
					| next \
					| ns \
					| oki \
					| omron* \
					| pc533* \
					| rebel \
					| rom68k \
					| rombug \
					| semi \
					| sequent* \
					| sgi* \
					| siemens \
					| sim \
					| sni \
					| sony* \
					| stratus \
					| sun \
					| sun[234]* \
					| tektronix \
					| tti* \
					| ultra \
					| unicom* \
					| wec \
					| winbond \
					| wrs)
						basic_machine=$field1-$field2
						basic_os=
						;;
					tock* | zephyr*)
						basic_machine=$field1-unknown
						basic_os=$field2
						;;
					*)
						basic_machine=$field1
						basic_os=$field2
						;;
				esac
			;;
		esac
		;;
	*)
		# Convert single-component short-hands not valid as part of
		# multi-component configurations.
		case $field1 in
			386bsd)
				basic_machine=i386-pc
				basic_os=bsd
				;;
			a29khif)
				basic_machine=a29k-amd
				basic_os=udi
				;;
			adobe68k)
				basic_machine=m68010-adobe
				basic_os=scout
				;;
			alliant)
				basic_machine=fx80-alliant
				basic_os=
				;;
			altos | altos3068)
				basic_machine=m68k-altos
				basic_os=
				;;
			am29k)
				basic_machine=a29k-none
				basic_os=bsd
				;;
			amdahl)
				basic_machine=580-amdahl
				basic_os=sysv
				;;
			amiga)
				basic_machine=m68k-unknown
				basic_os=
				;;
			amigaos | amigados)
				basic_machine=m68k-unknown
				basic_os=amigaos
				;;
			amigaunix | amix)
				basic_machine=m68k-unknown
				basic_os=sysv4
				;;
			apollo68)
				basic_machine=m68k-apollo
				basic_os=sysv
				;;
			apollo68bsd)
				basic_machine=m68k-apollo
				basic_os=bsd
				;;
			aros)
				basic_machine=i386-pc
				basic_os=aros
				;;
			aux)
				basic_machine=m68k-apple
				basic_os=aux
				;;
			balance)
				basic_machine=ns32k-sequent
				basic_os=dynix
				;;
			blackfin)
				basic_machine=bfin-unknown
				basic_os=linux
				;;
			cegcc)
				basic_machine=arm-unknown
				basic_os=cegcc
				;;
			cray)
				basic_machine=j90-cray
				basic_os=unicos
				;;
			crds | unos)
				basic_machine=m68k-crds
				basic_os=
				;;
			da30)
				basic_machine=m68k-da30
				basic_os=
				;;
			decstation | pmax | pmin | dec3100 | decstatn)
				basic_machine=mips-dec
				basic_os=
				;;
			delta88)
				basic_machine=m88k-motorola
				basic_os=sysv3
				;;
			dicos)
				basic_machine=i686-pc
				basic_os=dicos
				;;
			djgpp)
				basic_machine=i586-pc
				basic_os=msdosdjgpp
				;;
			ebmon29k)
				basic_machine=a29k-amd
				basic_os=ebmon
				;;
			es1800 | OSE68k | ose68k | ose | OSE)
				basic_machine=m68k-ericsson
				basic_os=ose
				;;
			gmicro)
				basic_machine=tron-gmicro
				basic_os=sysv
				;;
			go32)
				basic_machine=i386-pc
				basic_os=go32
				;;
			h8300hms)
				basic_machine=h8300-hitachi
				basic_os=hms
				;;
			h8300xray)
				basic_machine=h8300-hitachi
				basic_os=xray
				;;
			h8500hms)
				basic_machine=h8500-hitachi
				basic_os=hms
				;;
			harris)
				basic_machine=m88k-harris
				basic_os=sysv3
				;;
			hp300 | hp300hpux)
				basic_machine=m68k-hp
				basic_os=hpux
				;;
			hp300bsd)
				basic_machine=m68k-hp
				basic_os=bsd
				;;
			hppaosf)
				basic_machine=hppa1.1-hp
				basic_os=osf
				;;
			hppro)
				basic_machine=hppa1.1-hp
				basic_os=proelf
				;;
			i386mach)
				basic_machine=i386-mach
				basic_os=mach
				;;
			isi68 | isi)
				basic_machine=m68k-isi
				basic_os=sysv
				;;
			m68knommu)
				basic_machine=m68k-unknown
				basic_os=linux
				;;
			magnum | m3230)
				basic_machine=mips-mips
				basic_os=sysv
				;;
			merlin)
				basic_machine=ns32k-utek
				basic_os=sysv
				;;
			mingw64)
				basic_machine=x86_64-pc
				basic_os=mingw64
				;;
			mingw32)
				basic_machine=i686-pc
				basic_os=mingw32
				;;
			mingw32ce)
				basic_machine=arm-unknown
				basic_os=mingw32ce
				;;
			monitor)
				basic_machine=m68k-rom68k
				basic_os=coff
				;;
			morphos)
				basic_machine=powerpc-unknown
				basic_os=morphos
				;;
			moxiebox)
				basic_machine=moxie-unknown
				basic_os=moxiebox
				;;
			msdos)
				basic_machine=i386-pc
				basic_os=msdos
				;;
			msys)
				basic_machine=i686-pc
				basic_os=msys
				;;
			mvs)
				basic_machine=i370-ibm
				basic_os=mvs
				;;
			nacl)
				basic_machine=le32-unknown
				basic_os=nacl
				;;
			ncr3000)
				basic_machine=i486-ncr
				basic_os=sysv4
				;;
			netbsd386)
				basic_machine=i386-pc
				basic_os=netbsd
				;;
			netwinder)
				basic_machine=armv4l-rebel
				basic_os=linux
				;;
			news | news700 | news800 | news900)
				basic_machine=m68k-sony
				basic_os=newsos
				;;
			news1000)
				basic_machine=m68030-sony
				basic_os=newsos
				;;
			necv70)
				basic_machine=v70-nec
				basic_os=sysv
				;;
			nh3000)
				basic_machine=m68k-harris
				basic_os=cxux
				;;
			nh[45]000)
				basic_machine=m88k-harris
				basic_os=cxux
				;;
			nindy960)
				basic_machine=i960-intel
				basic_os=nindy
				;;
			mon960)
				basic_machine=i960-intel
				basic_os=mon960
				;;
			nonstopux)
				basic_machine=mips-compaq
				basic_os=nonstopux
				;;
			os400)
				basic_machine=powerpc-ibm
				basic_os=os400
				;;
			OSE68000 | ose68000)
				basic_machine=m68000-ericsson
				basic_os=ose
				;;
			os68k)
				basic_machine=m68k-none
				basic_os=os68k
				;;
			paragon)
				basic_machine=i860-intel
				basic_os=osf
				;;
			parisc)
				basic_machine=hppa-unknown
				basic_os=linux
				;;
			psp)
				basic_machine=mipsallegrexel-sony
				basic_os=psp
				;;
			pw32)
				basic_machine=i586-unknown
				basic_os=pw32
				;;
			rdos | rdos64)
				basic_machine=x86_64-pc
				basic_os=rdos
				;;
			rdos32)
				basic_machine=i386-pc
				basic_os=rdos
				;;
			rom68k)
				basic_machine=m68k-rom68k
				basic_os=coff
				;;
			sa29200)
				basic_machine=a29k-amd
				basic_os=udi
				;;
			sei)
				basic_machine=mips-sei
				basic_os=seiux
				;;
			sequent)
				basic_machine=i386-sequent
				basic_os=
				;;
			sps7)
				basic_machine=m68k-bull
				basic_os=sysv2
				;;
			st2000)
				basic_machine=m68k-tandem
				basic_os=
				;;
			stratus)
				basic_machine=i860-stratus
				basic_os=sysv4
				;;
			sun2)
				basic_machine=m68000-sun
				basic_os=
				;;
			sun2os3)
				basic_machine=m68000-sun
				basic_os=sunos3
				;;
			sun2os4)
				basic_machine=m68000-sun
				basic_os=sunos4
				;;
			sun3)
				basic_machine=m68k-sun
				basic_os=
				;;
			sun3os3)
				basic_machine=m68k-sun
				basic_os=sunos3
				;;
			sun3os4)
				basic_machine=m68k-sun
				basic_os=sunos4
				;;
			sun4)
				basic_machine=sparc-sun
				basic_os=
				;;
			sun4os3)
				basic_machine=sparc-sun
				basic_os=sunos3
				;;
			sun4os4)
				basic_machine=sparc-sun
				basic_os=sunos4
				;;
			sun4sol2)
				basic_machine=sparc-sun
				basic_os=solaris2
				;;
			sun386 | sun386i | roadrunner)
				basic_machine=i386-sun
				basic_os=
				;;
			sv1)
				basic_machine=sv1-cray
				basic_os=unicos
				;;
			symmetry)
				basic_machine=i386-sequent
				basic_os=dynix
				;;
			t3e)
				basic_machine=alphaev5-cray
				basic_os=unicos
				;;
			t90)
				basic_machine=t90-cray
				basic_os=unicos
				;;
			toad1)
				basic_machine=pdp10-xkl
				basic_os=tops20
				;;
			tpf)
				basic_machine=s390x-ibm
				basic_os=tpf
				;;
			udi29k)
				basic_machine=a29k-amd
				basic_os=udi
				;;
			ultra3)
				basic_machine=a29k-nyu
				basic_os=sym1
				;;
			v810 | necv810)
				basic_machine=v810-nec
				basic_os=none
				;;
			vaxv)
				basic_machine=vax-dec
				basic_os=sysv
				;;
			vms)
				basic_machine=vax-dec
				basic_os=vms
				;;
			vsta)
				basic_machine=i386-pc
				basic_os=vsta
				;;
			vxworks960)
				basic_machine=i960-wrs
				basic_os=vxworks
				;;
			vxworks68)
				basic_machine=m68k-wrs
				basic_os=vxworks
				;;
			vxworks29k)
				basic_machine=a29k-wrs
				basic_os=vxworks
				;;
			xbox)
				basic_machine=i686-pc
				basic_os=mingw32
				;;
			ymp)
				basic_machine=ymp-cray
				basic_os=unicos
				;;
			*)
				basic_machine=$1
				basic_os=
				;;
		esac
		;;
esac

# Decode 1-component or ad-hoc basic machines
case $basic_machine in
	# Here we handle the default manufacturer of certain CPU types.  It is in
	# some cases the only manufacturer, in others, it is the most popular.
	w89k)
		cpu=hppa1.1
		vendor=winbond
		;;
	op50n)
		cpu=hppa1.1
		vendor=oki
		;;
	op60c)
		cpu=hppa1.1
		vendor=oki
		;;
	ibm*)
		cpu=i370
		vendor=ibm
		;;
	orion105)
		cpu=clipper
		vendor=highlevel
		;;
	mac | mpw | mac-mpw)
		cpu=m68k
		vendor=apple
		;;
	pmac | pmac-mpw)
		cpu=powerpc
		vendor=apple
		;;

	# Recognize the various machine names and aliases which stand
	# for a CPU type and a company and sometimes even an OS.
	3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
		cpu=m68000
		vendor=att
		;;
	3b*)
		cpu=we32k
		vendor=att
		;;
	bluegene*)
		cpu=powerpc
		vendor=ibm
		basic_os=cnk
		;;
	decsystem10* | dec10*)
		cpu=pdp10
		vendor=dec
		basic_os=tops10
		;;
	decsystem20* | dec20*)
		cpu=pdp10
		vendor=dec
		basic_os=tops20
		;;
	delta | 3300 | delta-motorola | 3300-motorola | motorola-delta | motorola-3300)
		cpu=m68k
		vendor=motorola
		;;
	# This used to be dpx2*, but that gets the RS6000-based
	# DPX/20 and the x86-based DPX/2-100 wrong.  See
	# https://oldskool.silicium.org/stations/bull_dpx20.htm
	# https://www.feb-patrimoine.com/english/bull_dpx2.htm
	# https://www.feb-patrimoine.com/english/unix_and_bull.htm
	dpx2 | dpx2[23]00 | dpx2[23]xx)
		cpu=m68k
		vendor=bull
		;;
	dpx2100 | dpx21xx)
		cpu=i386
		vendor=bull
		;;
	dpx20)
		cpu=rs6000
		vendor=bull
		;;
	encore | umax | mmax)
		cpu=ns32k
		vendor=encore
		;;
	elxsi)
		cpu=elxsi
		vendor=elxsi
		basic_os=${basic_os:-bsd}
		;;
	fx2800)
		cpu=i860
		vendor=alliant
		;;
	genix)
		cpu=ns32k
		vendor=ns
		;;
	h3050r* | hiux*)
		cpu=hppa1.1
		vendor=hitachi
		basic_os=hiuxwe2
		;;
	hp3k9[0-9][0-9] | hp9[0-9][0-9])
		cpu=hppa1.0
		vendor=hp
		;;
	hp9k2[0-9][0-9] | hp9k31[0-9])
		cpu=m68000
		vendor=hp
		;;
	hp9k3[2-9][0-9])
		cpu=m68k
		vendor=hp
		;;
	hp9k6[0-9][0-9] | hp6[0-9][0-9])
		cpu=hppa1.0
		vendor=hp
		;;
	hp9k7[0-79][0-9] | hp7[0-79][0-9])
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k78[0-9] | hp78[0-9])
		# FIXME: really hppa2.0-hp
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k8[67]1 | hp8[67]1 | hp9k80[24] | hp80[24] | hp9k8[78]9 | hp8[78]9 | hp9k893 | hp893)
		# FIXME: really hppa2.0-hp
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k8[0-9][13679] | hp8[0-9][13679])
		cpu=hppa1.1
		vendor=hp
		;;
	hp9k8[0-9][0-9] | hp8[0-9][0-9])
		cpu=hppa1.0
		vendor=hp
		;;
	i*86v32)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=sysv32
		;;
	i*86v4*)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=sysv4
		;;
	i*86v)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=sysv
		;;
	i*86sol2)
		cpu=`echo "$1" | sed -e 's/86.*/86/'`
		vendor=pc
		basic_os=solaris2
		;;
	j90 | j90-cray)
		cpu=j90
		vendor=cray
		basic_os=${basic_os:-unicos}
		;;
	iris | iris4d)
		cpu=mips
		vendor=sgi
		case $basic_os in
		    irix*)
			;;
		    *)
			basic_os=irix4
			;;
		esac
		;;
	miniframe)
		cpu=m68000
		vendor=convergent
		;;
	*mint | mint[0-9]* | *MiNT | *MiNT[0-9]*)
		cpu=m68k
		vendor=atari
		basic_os=mint
		;;
	news-3600 | risc-news)
		cpu=mips
		vendor=sony
		basic_os=newsos
		;;
	next | m*-next)
		cpu=m68k
		vendor=next
		;;
	np1)
		cpu=np1
		vendor=gould
		;;
	op50n-* | op60c-*)
		cpu=hppa1.1
		vendor=oki
		basic_os=proelf
		;;
	pa-hitachi)
		cpu=hppa1.1
		vendor=hitachi
		basic_os=hiuxwe2
		;;
	pbd)
		cpu=sparc
		vendor=tti
		;;
	pbb)
		cpu=m68k
		vendor=tti
		;;
	pc532)
		cpu=ns32k
		vendor=pc532
		;;
	pn)
		cpu=pn
		vendor=gould
		;;
	power)
		cpu=power
		vendor=ibm
		;;
	ps2)
		cpu=i386
		vendor=ibm
		;;
	rm[46]00)
		cpu=mips
		vendor=siemens
		;;
	rtpc | rtpc-*)
		cpu=romp
		vendor=ibm
		;;
	sde)
		cpu=mipsisa32
		vendor=sde
		basic_os=${basic_os:-elf}
		;;
	simso-wrs)
		cpu=sparclite
		vendor=wrs
		basic_os=vxworks
		;;
	tower | tower-32)
		cpu=m68k
		vendor=ncr
		;;
	vpp*|vx|vx-*)
		cpu=f301
		vendor=fujitsu
		;;
	w65)
		cpu=w65
		vendor=wdc
		;;
	w89k-*)
		cpu=hppa1.1
		vendor=winbond
		basic_os=proelf
		;;
	none)
		cpu=none
		vendor=none
		;;
	leon|leon[3-9])
		cpu=sparc
		vendor=$basic_machine
		;;
	leon-*|leon[3-9]-*)
		cpu=sparc
		vendor=`echo "$basic_machine" | sed 's/-.*//'`
		;;

	*-*)
		saved_IFS=$IFS
		IFS="-" read cpu vendor <<EOF
$basic_machine
EOF
		IFS=$saved_IFS
		;;
	# We use 'pc' rather than 'unknown'
	# because (1) that's what they normally are, and
	# (2) the word "unknown" tends to confuse beginning users.
	i*86 | x86_64)
		cpu=$basic_machine
		vendor=pc
		;;
	# These rules are duplicated from below for sake of the special case above;
	# i.e. things that normalized to x86 arches should also default to "pc"
	pc98)
		cpu=i386
		vendor=pc
		;;
	x64 | amd64)
		cpu=x86_64
		vendor=pc
		;;
	# Recognize the basic CPU types without company name.
	*)
		cpu=$basic_machine
		vendor=unknown
		;;
esac

unset -v basic_machine

# Decode basic machines in the full and proper CPU-Company form.
case $cpu-$vendor in
	# Here we handle the default manufacturer of certain CPU types in canonical form.
	# It is in some cases the only manufacturer, in others, it is the most popular.
	c[12]-convex | c[12]-unknown | c3[248]-convex | c3[248]-unknown)
		vendor=convex
		basic_os=${basic_os:-bsd}
		;;
	craynv-unknown)
		vendor=cray
		basic_os=${basic_os:-unicosmp}
		;;
	c90-unknown | c90-cray)
		vendor=cray
		basic_os=${basic_os:-unicos}
		;;
	fx80-unknown)
		vendor=alliant
		;;
	romp-unknown)
		vendor=ibm
		;;
	mmix-unknown)
		vendor=knuth
		;;
	microblaze-unknown | microblazeel-unknown)
		vendor=xilinx
		;;
	rs6000-unknown)
		vendor=ibm
		;;
	vax-unknown)
		vendor=dec
		;;
	pdp11-unknown)
		vendor=dec
		;;
	we32k-unknown)
		vendor=att
		;;
	cydra-unknown)
		vendor=cydrome
		;;
	i370-ibm*)
		vendor=ibm
		;;
	orion-unknown)
		vendor=highlevel
		;;
	xps-unknown | xps100-unknown)
		cpu=xps100
		vendor=honeywell
		;;

	# Here we normalize CPU types with a missing or matching vendor
	armh-unknown | armh-alt)
		cpu=armv7l
		vendor=alt
		basic_os=${basic_os:-linux-gnueabihf}
		;;

	# Normalized CPU+vendor pairs that imply an OS, if not otherwise specified
	m68k-isi)
		basic_os=${basic_os:-sysv}
		;;
	m68k-sony)
		basic_os=${basic_os:-newsos}
		;;
	m68k-tektronix)
		basic_os=${basic_os:-bsd}
		;;
	m88k-harris)
		basic_os=${basic_os:-sysv3}
		;;
	i386-bull | m68k-bull)
		basic_os=${basic_os:-sysv3}
		;;
	rs6000-bull)
		basic_os=${basic_os:-bosx}
		;;
	mips-sni)
		basic_os=${basic_os:-sysv4}
		;;

	# Here we normalize CPU types irrespective of the vendor
	amd64-*)
		cpu=x86_64
		;;
	blackfin-*)
		cpu=bfin
		basic_os=${basic_os:-linux}
		;;
	c54x-*)
		cpu=tic54x
		;;
	c55x-*)
		cpu=tic55x
		;;
	c6x-*)
		cpu=tic6x
		;;
	e500v[12]-*)
		cpu=powerpc
		basic_os=${basic_os}"spe"
		;;
	mips3*-*)
		cpu=mips64
		;;
	ms1-*)
		cpu=mt
		;;
	m68knommu-*)
		cpu=m68k
		basic_os=${basic_os:-linux}
		;;
	m9s12z-* | m68hcs12z-* | hcs12z-* | s12z-*)
		cpu=s12z
		;;
	openrisc-*)
		cpu=or32
		;;
	parisc-*)
		cpu=hppa
		basic_os=${basic_os:-linux}
		;;
	pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
		cpu=i586
		;;
	pentiumpro-* | p6-* | 6x86-* | athlon-* | athlon_*-*)
		cpu=i686
		;;
	pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
		cpu=i686
		;;
	pentium4-*)
		cpu=i786
		;;
	ppc-* | ppcbe-*)
		cpu=powerpc
		;;
	ppcle-* | powerpclittle-*)
		cpu=powerpcle
		;;
	ppc64-*)
		cpu=powerpc64
		;;
	ppc64le-* | powerpc64little-*)
		cpu=powerpc64le
		;;
	sb1-*)
		cpu=mipsisa64sb1
		;;
	sb1el-*)
		cpu=mipsisa64sb1el
		;;
	sh5e[lb]-*)
		cpu=`echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/'`
		;;
	spur-*)
		cpu=spur
		;;
	strongarm-* | thumb-*)
		cpu=arm
		;;
	tx39-*)
		cpu=mipstx39
		;;
	tx39el-*)
		cpu=mipstx39el
		;;
	xscale-* | xscalee[bl]-*)
		cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
		;;
	arm64-* | aarch64le-* | arm64_32-*)
		cpu=aarch64
		;;

	# Recognize the canonical CPU Types that limit and/or modify the
	# company names they are paired with.
	cr16-*)
		basic_os=${basic_os:-elf}
		;;
	crisv32-* | etraxfs*-*)
		cpu=crisv32
		vendor=axis
		;;
	cris-* | etrax*-*)
		cpu=cris
		vendor=axis
		;;
	crx-*)
		basic_os=${basic_os:-elf}
		;;
	neo-tandem)
		cpu=neo
		vendor=tandem
		;;
	nse-tandem)
		cpu=nse
		vendor=tandem
		;;
	nsr-tandem)
		cpu=nsr
		vendor=tandem
		;;
	nsv-tandem)
		cpu=nsv
		vendor=tandem
		;;
	nsx-tandem)
		cpu=nsx
		vendor=tandem
		;;
	mipsallegrexel-sony)
		cpu=mipsallegrexel
		vendor=sony
		;;
	tile*-*)
		basic_os=${basic_os:-linux-gnu}
		;;

	*)
		# Recognize the canonical CPU types that are allowed with any
		# company name.
		case $cpu in
			  1750a \
			| 580 \
			| [cjt]90 \
			| a29k \
			| aarch64 \
			| aarch64_be \
			| aarch64c \
			| abacus \
			| alpha \
			| alpha64 \
			| alpha64ev56 \
			| alpha64ev6[78] \
			| alpha64ev[4-8] \
			| alpha64pca5[67] \
			| alphaev56 \
			| alphaev6[78] \
			| alphaev[4-8] \
			| alphapca5[67] \
			| am33_2.0 \
			| amdgcn \
			| arc \
			| arc32 \
			| arc64 \
			| arceb \
			| arm \
			| arm64e \
			| arm64ec \
			| arm[lb]e \
			| arme[lb] \
			| armv* \
			| asmjs \
			| avr \
			| avr32 \
			| ba \
			| be32 \
			| be64 \
			| bfin \
			| bpf \
			| bs2000 \
			| c30 \
			| c4x \
			| c8051 \
			| c[123]* \
			| clipper \
			| craynv \
			| csky \
			| cydra \
			| d10v \
			| d30v \
			| dlx \
			| dsp16xx \
			| e2k \
			| elxsi \
			| epiphany \
			| f30[01] \
			| f700 \
			| fido \
			| fr30 \
			| frv \
			| ft32 \
			| fx80 \
			| h8300 \
			| h8500 \
			| hexagon \
			| hppa \
			| hppa1.[01] \
			| hppa2.0 \
			| hppa2.0[nw] \
			| hppa64 \
			| i*86 \
			| i370 \
			| i860 \
			| i960 \
			| ia16 \
			| ia64 \
			| intelgt \
			| ip2k \
			| iq2000 \
			| javascript \
			| k1om \
			| kvx \
			| le32 \
			| le64 \
			| lm32 \
			| loongarch32 \
			| loongarch64 \
			| m32c \
			| m32r \
			| m32rle \
			| m5200 \
			| m68000 \
			| m680[012346]0 \
			| m6811 \
			| m6812 \
			| m68360 \
			| m683?2 \
			| m68hc11 \
			| m68hc12 \
			| m68hcs12x \
			| m68k \
			| m88110 \
			| m88k \
			| maxq \
			| mb \
			| mcore \
			| mep \
			| metag \
			| microblaze \
			| microblazeel \
			| mips* \
			| mmix \
			| mn10200 \
			| mn10300 \
			| moxie \
			| msp430 \
			| mt \
			| nanomips* \
			| nds32 \
			| nds32be \
			| nds32le \
			| nfp \
			| nios \
			| nios2 \
			| nios2eb \
			| nios2el \
			| none \
			| np1 \
			| ns16k \
			| ns32k \
			| nvptx \
			| open8 \
			| or1k* \
			| or32 \
			| orion \
			| pdp10 \
			| pdp11 \
			| picochip \
			| pj \
			| pjl \
			| pn \
			| power \
			| powerpc \
			| powerpc64 \
			| powerpc64le \
			| powerpcle \
			| powerpcspe \
			| pru \
			| pyramid \
			| riscv \
			| riscv32 \
			| riscv32be \
			| riscv64 \
			| riscv64be \
			| rl78 \
			| romp \
			| rs6000 \
			| rx \
			| s390 \
			| s390x \
			| score \
			| sh \
			| sh64 \
			| sh64le \
			| sh[12345][lb]e \
			| sh[1234] \
			| sh[1234]e[lb] \
			| sh[23]e \
			| sh[23]ele \
			| sh[24]a \
			| sh[24]ae[lb] \
			| sh[lb]e \
			| she[lb] \
			| shl \
			| sparc \
			| sparc64 \
			| sparc64b \
			| sparc64v \
			| sparc86x \
			| sparclet \
			| sparclite \
			| sparcv8 \
			| sparcv9 \
			| sparcv9b \
			| sparcv9v \
			| spu \
			| sv1 \
			| sx* \
			| tahoe \
			| thumbv7* \
			| tic30 \
			| tic4x \
			| tic54x \
			| tic55x \
			| tic6x \
			| tic80 \
			| tron \
			| ubicom32 \
			| v70 \
			| v810 \
			| v850 \
			| v850e \
			| v850e1 \
			| v850e2 \
			| v850e2v3 \
			| v850es \
			| vax \
			| vc4 \
			| visium \
			| w65 \
			| wasm32 \
			| wasm64 \
			| we32k \
			| x86 \
			| x86_64 \
			| xc16x \
			| xgate \
			| xps100 \
			| xstormy16 \
			| xtensa* \
			| ymp \
			| z80 \
			| z8k)
				;;

			*)
				echo "Invalid configuration '$1': machine '$cpu-$vendor' not recognized" 1>&2
				exit 1
				;;
		esac
		;;
esac

# Here we canonicalize certain aliases for manufacturers.
case $vendor in
	digital*)
		vendor=dec
		;;
	commodore*)
		vendor=cbm
		;;
	*)
		;;
esac

# Decode manufacturer-specific aliases for certain operating systems.

if test x"$basic_os" != x
then

# First recognize some ad-hoc cases, or perhaps split kernel-os, or else just
# set os.
obj=
case $basic_os in
	gnu/linux*)
		kernel=linux
		os=`echo "$basic_os" | sed -e 's|gnu/linux|gnu|'`
		;;
	os2-emx)
		kernel=os2
		os=`echo "$basic_os" | sed -e 's|os2-emx|emx|'`
		;;
	nto-qnx*)
		kernel=nto
		os=`echo "$basic_os" | sed -e 's|nto-qnx|qnx|'`
		;;
	*-*)
		saved_IFS=$IFS
		IFS="-" read kernel os <<EOF
$basic_os
EOF
		IFS=$saved_IFS
		;;
	# Default OS when just kernel was specified
	nto*)
		kernel=nto
		os=`echo "$basic_os" | sed -e 's|nto|qnx|'`
		;;
	ironclad*)
		kernel=ironclad
		os=`echo "$basic_os" | sed -e 's|ironclad|mlibc|'`
		;;
	linux*)
		kernel=linux
		os=`echo "$basic_os" | sed -e 's|linux|gnu|'`
		;;
	managarm*)
		kernel=managarm
		os=`echo "$basic_os" | sed -e 's|managarm|mlibc|'`
		;;
	*)
		kernel=
		os=$basic_os
		;;
esac

# Now, normalize the OS (knowing we just have one component, it's not a kernel,
# etc.)
case $os in
	# First match some system type aliases that might get confused
	# with valid system types.
	# solaris* is a basic system type, with this one exception.
	auroraux)
		os=auroraux
		;;
	bluegene*)
		os=cnk
		;;
	solaris1 | solaris1.*)
		os=`echo "$os" | sed -e 's|solaris1|sunos4|'`
		;;
	solaris)
		os=solaris2
		;;
	unixware*)
		os=sysv4.2uw
		;;
	# The marketing names for NeXT's operating systems were
	# NeXTSTEP, NeXTSTEP 2, OpenSTEP 3, OpenSTEP 4.  'openstep' is
	# mapped to 'openstep3', but 'openstep1' and 'openstep2' are
	# mapped to 'nextstep' and 'nextstep2', consistent with the
	# treatment of SunOS/Solaris.
	ns | ns1 | nextstep | nextstep1 | openstep1)
		os=nextstep
		;;
	ns2 | nextstep2 | openstep2)
		os=nextstep2
		;;
	ns3 | nextstep3 | openstep | openstep3)
		os=openstep3
		;;
	ns4 | nextstep4 | openstep4)
		os=openstep4
		;;
	# es1800 is here to avoid being matched by es* (a different OS)
	es1800*)
		os=ose
		;;
	# Some version numbers need modification
	chorusos*)
		os=chorusos
		;;
	isc)
		os=isc2.2
		;;
	sco6)
		os=sco5v6
		;;
	sco5)
		os=sco3.2v5
		;;
	sco4)
		os=sco3.2v4
		;;
	sco3.2.[4-9]*)
		os=`echo "$os" | sed -e 's/sco3.2./sco3.2v/'`
		;;
	sco*v* | scout)
		# Don't match below
		;;
	sco*)
		os=sco3.2v2
		;;
	psos*)
		os=psos
		;;
	qnx*)
		os=qnx
		;;
	hiux*)
		os=hiuxwe2
		;;
	lynx*178)
		os=lynxos178
		;;
	lynx*5)
		os=lynxos5
		;;
	lynxos*)
		# don't get caught up in next wildcard
		;;
	lynx*)
		os=lynxos
		;;
	mac[0-9]*)
		os=`echo "$os" | sed -e 's|mac|macos|'`
		;;
	opened*)
		os=openedition
		;;
	os400*)
		os=os400
		;;
	sunos5*)
		os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
		;;
	sunos6*)
		os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
		;;
	wince*)
		os=wince
		;;
	utek*)
		os=bsd
		vendor=`echo "$vendor" | sed -e 's|^unknown$|tektronix|'`
		;;
	dynix*)
		os=bsd
		;;
	acis*)
		os=aos
		;;
	atheos*)
		os=atheos
		;;
	syllable*)
		os=syllable
		;;
	386bsd)
		os=bsd
		;;
	ctix*)
		os=sysv
		vendor=`echo "$vendor" | sed -e 's|^unknown$|convergent|'`
		;;
	uts*)
		os=sysv
		;;
	nova*)
		kernel=rtmk
		os=nova
		;;
	# Preserve the version number of sinix5.
	sinix5.*)
		os=`echo "$os" | sed -e 's|sinix|sysv|'`
		vendor=`echo "$vendor" | sed -e 's|^unknown$|sni|'`
		;;
	sinix*)
		os=sysv4
		vendor=`echo "$vendor" | sed -e 's|^unknown$|sni|'`
		;;
	tpf*)
		os=tpf
		;;
	triton*)
		os=sysv3
		;;
	oss*)
		os=sysv3
		;;
	svr4*)
		os=sysv4
		;;
	svr3)
		os=sysv3
		;;
	sysvr4)
		os=sysv4
		;;
	ose*)
		os=ose
		;;
	*mint | mint[0-9]* | *MiNT | MiNT[0-9]*)
		os=mint
		;;
	dicos*)
		os=dicos
		;;
	pikeos*)
		# Until real need of OS specific support for
		# particular features comes up, bare metal
		# configurations are quite functional.
		case $cpu in
		    arm*)
			os=eabi
			;;
		    *)
			os=
			obj=elf
			;;
		esac
		;;
	aout* | coff* | elf* | pe*)
		# These are machine code file formats, not OSes
		obj=$os
		os=
		;;
	*)
		# No normalization, but not necessarily accepted, that comes below.
		;;
esac

else

# Here we handle the default operating systems that come with various machines.
# The value should be what the vendor currently ships out the door with their
# machine or put another way, the most popular os provided with the machine.

# Note that if you're going to try to match "-MANUFACTURER" here (say,
# "-sun"), then you have to tell the case statement up towards the top
# that MANUFACTURER isn't an operating system.  Otherwise, code above
# will signal an error saying that MANUFACTURER isn't an operating
# system, and we'll never get to this point.

kernel=
obj=
case $cpu-$vendor in
	score-*)
		os=
		obj=elf
		;;
	spu-*)
		os=
		obj=elf
		;;
	*-acorn)
		os=riscix1.2
		;;
	arm*-rebel)
		kernel=linux
		os=gnu
		;;
	arm*-semi)
		os=
		obj=aout
		;;
	c4x-* | tic4x-*)
		os=
		obj=coff
		;;
	c8051-*)
		os=
		obj=elf
		;;
	clipper-intergraph)
		os=clix
		;;
	hexagon-*)
		os=
		obj=elf
		;;
	tic54x-*)
		os=
		obj=coff
		;;
	tic55x-*)
		os=
		obj=coff
		;;
	tic6x-*)
		os=
		obj=coff
		;;
	# This must come before the *-dec entry.
	pdp10-*)
		os=tops20
		;;
	pdp11-*)
		os=none
		;;
	*-dec | vax-*)
		os=ultrix4.2
		;;
	m68*-apollo)
		os=domain
		;;
	i386-sun)
		os=sunos4.0.2
		;;
	m68000-sun)
		os=sunos3
		;;
	m68*-cisco)
		os=
		obj=aout
		;;
	mep-*)
		os=
		obj=elf
		;;
	# The -sgi and -siemens entries must be before the mips- entry
	# or we get the wrong os.
	*-sgi)
		os=irix
		;;
	*-siemens)
		os=sysv4
		;;
	mips*-cisco)
		os=
		obj=elf
		;;
	mips*-*|nanomips*-*)
		os=
		obj=elf
		;;
	or32-*)
		os=
		obj=coff
		;;
	# This must be before the sparc-* entry or we get the wrong os.
	*-tti)
		os=sysv3
		;;
	sparc-* | *-sun)
		os=sunos4.1.1
		;;
	pru-*)
		os=
		obj=elf
		;;
	*-be)
		os=beos
		;;
	*-ibm)
		os=aix
		;;
	*-knuth)
		os=mmixware
		;;
	*-wec)
		os=proelf
		;;
	*-winbond)
		os=proelf
		;;
	*-oki)
		os=proelf
		;;
	*-hp)
		os=hpux
		;;
	*-hitachi)
		os=hiuxwe2
		;;
	i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
		os=sysv
		;;
	*-cbm)
		os=amigaos
		;;
	*-dg)
		os=dgux
		;;
	*-dolphin)
		os=sysv3
		;;
	m68k-ccur)
		os=rtu
		;;
	m88k-omron*)
		os=luna
		;;
	*-next)
		os=nextstep
		;;
	*-sequent)
		os=ptx
		;;
	*-crds)
		os=unos
		;;
	*-ns)
		os=genix
		;;
	i370-*)
		os=mvs
		;;
	*-gould)
		os=sysv
		;;
	*-highlevel)
		os=bsd
		;;
	*-encore)
		os=bsd
		;;
	*-masscomp)
		os=rtu
		;;
	f30[01]-fujitsu | f700-fujitsu)
		os=uxpv
		;;
	*-rom68k)
		os=
		obj=coff
		;;
	*-*bug)
		os=
		obj=coff
		;;
	*-apple)
		os=macos
		;;
	*-atari*)
		os=mint
		;;
	*-wrs)
		os=vxworks
		;;
	*)
		os=none
		;;
esac

fi

# Now, validate our (potentially fixed-up) individual pieces (OS, OBJ).

case $os in
	# Sometimes we do "kernel-libc", so those need to count as OSes.
	llvm* | musl* | newlib* | relibc* | uclibc*)
		;;
	# Likewise for "kernel-abi"
	eabi* | gnueabi*)
		;;
	# VxWorks passes extra cpu info in the 4th filed.
	simlinux | simwindows | spe)
		;;
	# See `case $cpu-$os` validation below
	ghcjs)
		;;
	# Now accept the basic system types.
	# Each alternative MUST end in a * to match a version number.
	  abug \
	| aix* \
	| amdhsa* \
	| amigados* \
	| amigaos* \
	| android* \
	| aof* \
	| aos* \
	| aros* \
	| atheos* \
	| auroraux* \
	| aux* \
	| banan_os* \
	| beos* \
	| bitrig* \
	| bme* \
	| bosx* \
	| bsd* \
	| cegcc* \
	| chorusos* \
	| chorusrdb* \
	| clix* \
	| cloudabi* \
	| cnk* \
	| conix* \
	| cos* \
	| cxux* \
	| cygwin* \
	| darwin* \
	| dgux* \
	| dicos* \
	| dnix* \
	| domain* \
	| dragonfly* \
	| drops* \
	| ebmon* \
	| ecoff* \
	| ekkobsd* \
	| emscripten* \
	| emx* \
	| es* \
	| fiwix* \
	| freebsd* \
	| fuchsia* \
	| genix* \
	| genode* \
	| glidix* \
	| gnu* \
	| go32* \
	| haiku* \
	| hcos* \
	| hiux* \
	| hms* \
	| hpux* \
	| ieee* \
	| interix* \
	| ios* \
	| iris* \
	| irix* \
	| isc* \
	| its* \
	| l4re* \
	| libertybsd* \
	| lites* \
	| lnews* \
	| luna* \
	| lynxos* \
	| mach* \
	| macos* \
	| magic* \
	| mbr* \
	| midipix* \
	| midnightbsd* \
	| mingw32* \
	| mingw64* \
	| minix* \
	| mint* \
	| mirbsd* \
	| mks* \
	| mlibc* \
	| mmixware* \
	| mon960* \
	| morphos* \
	| moss* \
	| moxiebox* \
	| mpeix* \
	| mpw* \
	| msdos* \
	| msys* \
	| mvs* \
	| nacl* \
	| netbsd* \
	| netware* \
	| newsos* \
	| nextstep* \
	| nindy* \
	| nonstopux* \
	| nova* \
	| nsk* \
	| nucleus* \
	| nx6 \
	| nx7 \
	| oabi* \
	| ohos* \
	| onefs* \
	| openbsd* \
	| openedition* \
	| openstep* \
	| os108* \
	| os2* \
	| os400* \
	| os68k* \
	| os9* \
	| ose* \
	| osf* \
	| oskit* \
	| osx* \
	| palmos* \
	| phoenix* \
	| plan9* \
	| powermax* \
	| powerunix* \
	| proelf* \
	| psos* \
	| psp* \
	| ptx* \
	| pw32* \
	| qnx* \
	| rdos* \
	| redox* \
	| rhapsody* \
	| riscix* \
	| riscos* \
	| rtems* \
	| rtmk* \
	| rtu* \
	| scout* \
	| secbsd* \
	| sei* \
	| serenity* \
	| sim* \
	| skyos* \
	| solaris* \
	| solidbsd* \
	| sortix* \
	| storm-chaos* \
	| sunos \
	| sunos[34]* \
	| superux* \
	| syllable* \
	| sym* \
	| sysv* \
	| tenex* \
	| tirtos* \
	| tock* \
	| toppers* \
	| tops10* \
	| tops20* \
	| tpf* \
	| tvos* \
	| twizzler* \
	| uclinux* \
	| udi* \
	| udk* \
	| ultrix* \
	| unicos* \
	| uniplus* \
	| unleashed* \
	| unos* \
	| uwin* \
	| uxpv* \
	| v88r* \
	|*vms* \
	| vos* \
	| vsta* \
	| vxsim* \
	| vxworks* \
	| wasi* \
	| watchos* \
	| wince* \
	| windiss* \
	| windows* \
	| winnt* \
	| xenix* \
	| xray* \
	| zephyr* \
	| zvmoe* )
		;;
	# This one is extra strict with allowed versions
	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)
		# Don't forget version if it is 3.2v4 or newer.
		;;
	# This refers to builds using the UEFI calling convention
	# (which depends on the architecture) and PE file format.
	# Note that this is both a different calling convention and
	# different file format than that of GNU-EFI
	# (x86_64-w64-mingw32).
	uefi)
		;;
	none)
		;;
	kernel* | msvc* )
		# Restricted further below
		;;
	'')
		if test x"$obj" = x
		then
			echo "Invalid configuration '$1': Blank OS only allowed with explicit machine code file format" 1>&2
		fi
		;;
	*)
		echo "Invalid configuration '$1': OS '$os' not recognized" 1>&2
		exit 1
		;;
esac

case $obj in
	aout* | coff* | elf* | pe*)
		;;
	'')
		# empty is fine
		;;
	*)
		echo "Invalid configuration '$1': Machine code format '$obj' not recognized" 1>&2
		exit 1
		;;
esac

# Here we handle the constraint that a (synthetic) cpu and os are
# valid only in combination with each other and nowhere else.
case $cpu-$os in
	# The "javascript-unknown-ghcjs" triple is used by GHC; we
	# accept it here in order to tolerate that, but reject any
	# variations.
	javascript-ghcjs)
		;;
	javascript-* | *-ghcjs)
		echo "Invalid configuration '$1': cpu '$cpu' is not valid with os '$os$obj'" 1>&2
		exit 1
		;;
esac

# As a final step for OS-related things, validate the OS-kernel combination
# (given a valid OS), if there is a kernel.
case $kernel-$os-$obj in
	linux-gnu*- | linux-android*- | linux-dietlibc*- | linux-llvm*- \
		    | linux-mlibc*- | linux-musl*- | linux-newlib*- \
		    | linux-relibc*- | linux-uclibc*- | linux-ohos*- )
		;;
	uclinux-uclibc*- | uclinux-gnu*- )
		;;
	ironclad-mlibc*-)
		;;
	managarm-mlibc*- | managarm-kernel*- )
		;;
	windows*-msvc*-)
		;;
	-dietlibc*- | -llvm*- | -mlibc*- | -musl*- | -newlib*- | -relibc*- \
		    | -uclibc*- )
		# These are just libc implementations, not actual OSes, and thus
		# require a kernel.
		echo "Invalid configuration '$1': libc '$os' needs explicit kernel." 1>&2
		exit 1
		;;
	-kernel*- )
		echo "Invalid configuration '$1': '$os' needs explicit kernel." 1>&2
		exit 1
		;;
	*-kernel*- )
		echo "Invalid configuration '$1': '$kernel' does not support '$os'." 1>&2
		exit 1
		;;
	*-msvc*- )
		echo "Invalid configuration '$1': '$os' needs 'windows'." 1>&2
		exit 1
		;;
	kfreebsd*-gnu*- | knetbsd*-gnu*- | netbsd*-gnu*- | kopensolaris*-gnu*-)
		;;
	vxworks-simlinux- | vxworks-simwindows- | vxworks-spe-)
		;;
	nto-qnx*-)
		;;
	os2-emx-)
		;;
	rtmk-nova-)
		;;
	*-eabi*- | *-gnueabi*-)
		;;
	ios*-simulator- | tvos*-simulator- | watchos*-simulator- )
		;;
	none--*)
		# None (no kernel, i.e. freestanding / bare metal),
		# can be paired with an machine code file format
		;;
	-*-)
		# Blank kernel with real OS is always fine.
		;;
	--*)
		# Blank kernel and OS with real machine code file format is always fine.
		;;
	*-*-*)
		echo "Invalid configuration '$1': Kernel '$kernel' not known to work with OS '$os'." 1>&2
		exit 1
		;;
esac

# Here we handle the case where we know the os, and the CPU type, but not the
# manufacturer.  We pick the logical manufacturer.
case $vendor in
	unknown)
		case $cpu-$os in
			*-riscix*)
				vendor=acorn
				;;
			*-sunos* | *-solaris*)
				vendor=sun
				;;
			*-cnk* | *-aix*)
				vendor=ibm
				;;
			*-beos*)
				vendor=be
				;;
			*-hpux*)
				vendor=hp
				;;
			*-mpeix*)
				vendor=hp
				;;
			*-hiux*)
				vendor=hitachi
				;;
			*-unos*)
				vendor=crds
				;;
			*-dgux*)
				vendor=dg
				;;
			*-luna*)
				vendor=omron
				;;
			*-genix*)
				vendor=ns
				;;
			*-clix*)
				vendor=intergraph
				;;
			*-mvs* | *-opened*)
				vendor=ibm
				;;
			*-os400*)
				vendor=ibm
				;;
			s390-* | s390x-*)
				vendor=ibm
				;;
			*-ptx*)
				vendor=sequent
				;;
			*-tpf*)
				vendor=ibm
				;;
			*-vxsim* | *-vxworks* | *-windiss*)
				vendor=wrs
				;;
			*-aux*)
				vendor=apple
				;;
			*-hms*)
				vendor=hitachi
				;;
			*-mpw* | *-macos*)
				vendor=apple
				;;
			*-*mint | *-mint[0-9]* | *-*MiNT | *-MiNT[0-9]*)
				vendor=atari
				;;
			*-vos*)
				vendor=stratus
				;;
		esac
		;;
esac

echo "$cpu-$vendor${kernel:+-$kernel}${os:+-$os}${obj:+-$obj}"
exit

# Local variables:
# eval: (add-hook 'before-save-hook 'time-stamp nil t)
# time-stamp-start: "timestamp='"
# time-stamp-format: "%Y-%02m-%02d"
# time-stamp-end: "'"
# End: