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#! /bin/sh
# Configuration validation subroutine script.
#   Copyright 1992-2020 Free Software Foundation, Inc.

timestamp='2020-11-07'

# 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/gitweb/?p=config.git;a=blob_plain;f=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.

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 1992-2020 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
# shellcheck disable=SC2162
IFS="-" read field1 field2 field3 field4 <<EOF
$1
EOF

# 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 $maybe_os in
                        nto-qnx* | linux-* | uclinux-uclibc* \
                        | uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* \
                        | netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
                        | storm-chaos* | os2-emx* | rtmk-nova*)
                                basic_machine=$field1
                                basic_os=$maybe_os
                                ;;
                        android-linux)
                                basic_machine=$field1-unknown
                                basic_os=linux-android
                                ;;
                        *)
                                basic_machine=$field1-$field2
                                basic_os=$field3
                                ;;
                esac
                ;;
        *-*)
                # A lone config we happen to match not fitting any pattern
                case $field1-$field2 in
                        decstation-3100)
                                basic_machine=mips-dec
                                basic_os=
                                ;;
                        *-*)
                                # Second component is usually, but not always the OS
                                case $field2 in
                                        # Prevent following clause from handling this valid os
                                        sun*os*)
                                                basic_machine=$field1
                                                basic_os=$field2
                                                ;;
                                        # Manufacturers
                                        dec* | mips* | sequent* | encore* | pc533* | sgi* | sony* \
                                        | att* | 7300* | 3300* | delta* | motorola* | sun[234]* \
                                        | unicom* | ibm* | next | hp | isi* | apollo | altos* \
                                        | convergent* | ncr* | news | 32* | 3600* | 3100* \
                                        | hitachi* | c[123]* | convex* | sun | crds | omron* | dg \
                                        | ultra | tti* | harris | dolphin | highlevel | gould \
                                        | cbm | ns | masscomp | apple | axis | knuth | cray \
                                        | microblaze* | sim | cisco \
                                        | oki | wec | wrs | winbond)
                                                basic_machine=$field1-$field2
                                                basic_os=
                                                ;;
                                        *)
                                                basic_machine=$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
                                ;;
                        convex-c1)
                                basic_machine=c1-convex
                                basic_os=bsd
                                ;;
                        convex-c2)
                                basic_machine=c2-convex
                                basic_os=bsd
                                ;;
                        convex-c32)
                                basic_machine=c32-convex
                                basic_os=bsd
                                ;;
                        convex-c34)
                                basic_machine=c34-convex
                                basic_os=bsd
                                ;;
                        convex-c38)
                                basic_machine=c38-convex
                                basic_os=bsd
                                ;;
                        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 | motorola-3300 | motorola-delta \
              | 3300-motorola | delta-motorola)
                cpu=m68k
                vendor=motorola
                ;;
        dpx2*)
                cpu=m68k
                vendor=bull
                basic_os=sysv3
                ;;
        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
                case $basic_os in
                    openstep*)
                        ;;
                    nextstep*)
                        ;;
                    ns2*)
                      basic_os=nextstep2
                        ;;
                    *)
                      basic_os=nextstep3
                        ;;
                esac
                ;;
        np1)
                cpu=np1
                vendor=gould
                ;;
        op50n-* | op60c-*)
                cpu=hppa1.1
                vendor=oki
                basic_os=proelf
                ;;
        pa-hitachi)
                cpu=hppa1.1
                vendor=hitachi
                basic_os=hiuxwe2
                ;;
        pbd)
                cpu=sparc
                vendor=tti
                ;;
        pbb)
                cpu=m68k
                vendor=tti
                ;;
        pc532)
                cpu=ns32k
                vendor=pc532
                ;;
        pn)
                cpu=pn
                vendor=gould
                ;;
        power)
                cpu=power
                vendor=ibm
                ;;
        ps2)
                cpu=i386
                vendor=ibm
                ;;
        rm[46]00)
                cpu=mips
                vendor=siemens
                ;;
        rtpc | rtpc-*)
                cpu=romp
                vendor=ibm
                ;;
        sde)
                cpu=mipsisa32
                vendor=sde
                basic_os=${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/-.*//')
                ;;

        *-*)
                # shellcheck disable=SC2162
                IFS="-" read cpu vendor <<EOF
$basic_machine
EOF
                ;;
        # We use `pc' rather than `unknown'
        # because (1) that's what they normally are, and
        # (2) the word "unknown" tends to confuse beginning users.
        i*86 | x86_64)
                cpu=$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.
        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
        dpx20-unknown | dpx20-bull)
                cpu=rs6000
                vendor=bull
                basic_os=${basic_os:-bosx}
                ;;

        # Here we normalize CPU types irrespective of the vendor
        amd64-*)
                cpu=x86_64
                ;;
        blackfin-*)
                cpu=bfin
                basic_os=linux
                ;;
        c54x-*)
                cpu=tic54x
                ;;
        c55x-*)
                cpu=tic55x
                ;;
        c6x-*)
                cpu=tic6x
                ;;
        e500v[12]-*)
                cpu=powerpc
                basic_os=${basic_os}"spe"
                ;;
        mips3*-*)
                cpu=mips64
                ;;
        ms1-*)
                cpu=mt
                ;;
        m68knommu-*)
                cpu=m68k
                basic_os=linux
                ;;
        m9s12z-* | m68hcs12z-* | hcs12z-* | s12z-*)
                cpu=s12z
                ;;
        openrisc-*)
                cpu=or32
                ;;
        parisc-*)
                cpu=hppa
                basic_os=linux
                ;;
        pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
                cpu=i586
                ;;
        pentiumpro-* | p6-* | 6x86-* | athlon-* | athalon_*-*)
                cpu=i686
                ;;
        pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
                cpu=i686
                ;;
        pentium4-*)
                cpu=i786
                ;;
        pc98-*)
                cpu=i386
                ;;
        ppc-* | ppcbe-*)
                cpu=powerpc
                ;;
        ppcle-* | powerpclittle-*)
                cpu=powerpcle
                ;;
        ppc64-*)
                cpu=powerpc64
                ;;
        ppc64le-* | powerpc64little-*)
                cpu=powerpc64le
                ;;
        sb1-*)
                cpu=mipsisa64sb1
                ;;
        sb1el-*)
                cpu=mipsisa64sb1el
                ;;
        sh5e[lb]-*)
                cpu=$(echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/')
                ;;
        spur-*)
                cpu=spur
                ;;
        strongarm-* | thumb-*)
                cpu=arm
                ;;
        tx39-*)
                cpu=mipstx39
                ;;
        tx39el-*)
                cpu=mipstx39el
                ;;
        x64-*)
                cpu=x86_64
                ;;
        xscale-* | xscalee[bl]-*)
                cpu=$(echo "$cpu" | sed 's/^xscale/arm/')
                ;;
        arm64-*)
                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 \
                        | a29k \
                        | aarch64 | aarch64_be \
                        | abacus \
                        | alpha | alphaev[4-8] | alphaev56 | alphaev6[78] \
                        | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] \
                        | alphapca5[67] | alpha64pca5[67] \
                        | am33_2.0 \
                        | amdgcn \
                        | arc | arceb \
                        | arm | arm[lb]e | arme[lb] | armv* \
                        | avr | avr32 \
                        | asmjs \
                        | ba \
                        | be32 | be64 \
                        | bfin | bpf | bs2000 \
                        | c[123]* | c30 | [cjt]90 | c4x \
                        | c8051 | clipper | craynv | csky | cydra \
                        | d10v | d30v | dlx | dsp16xx \
                        | e2k | elxsi | epiphany \
                        | f30[01] | f700 | fido | fr30 | frv | ft32 | fx80 \
                        | h8300 | h8500 \
                        | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
                        | hexagon \
                        | i370 | i*86 | i860 | i960 | ia16 | ia64 \
                        | ip2k | iq2000 \
                        | k1om \
                        | le32 | le64 \
                        | lm32 \
                        | m32c | m32r | m32rle \
                        | m5200 | m68000 | m680[012346]0 | m68360 | m683?2 | m68k \
                        | m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
                        | m88110 | m88k | maxq | mb | mcore | mep | metag \
                        | microblaze | microblazeel \
                        | mips | mipsbe | mipseb | mipsel | mipsle \
                        | mips16 \
                        | mips64 | mips64eb | mips64el \
                        | mips64octeon | mips64octeonel \
                        | mips64orion | mips64orionel \
                        | mips64r5900 | mips64r5900el \
                        | mips64vr | mips64vrel \
                        | mips64vr4100 | mips64vr4100el \
                        | mips64vr4300 | mips64vr4300el \
                        | mips64vr5000 | mips64vr5000el \
                        | mips64vr5900 | mips64vr5900el \
                        | mipsisa32 | mipsisa32el \
                        | mipsisa32r2 | mipsisa32r2el \
                        | mipsisa32r6 | mipsisa32r6el \
                        | mipsisa64 | mipsisa64el \
                        | mipsisa64r2 | mipsisa64r2el \
                        | mipsisa64r6 | mipsisa64r6el \
                        | mipsisa64sb1 | mipsisa64sb1el \
                        | mipsisa64sr71k | mipsisa64sr71kel \
                        | mipsr5900 | mipsr5900el \
                        | mipstx39 | mipstx39el \
                        | mmix \
                        | mn10200 | mn10300 \
                        | moxie \
                        | mt \
                        | msp430 \
                        | nds32 | nds32le | nds32be \
                        | nfp \
                        | nios | nios2 | nios2eb | nios2el \
                        | none | np1 | ns16k | ns32k | nvptx \
                        | open8 \
                        | or1k* \
                        | or32 \
                        | orion \
                        | picochip \
                        | pdp10 | pdp11 | pj | pjl | pn | power \
                        | powerpc | powerpc64 | powerpc64le | powerpcle | powerpcspe \
                        | pru \
                        | pyramid \
                        | riscv | riscv32 | riscv64 \
                        | rl78 | romp | rs6000 | rx \
                        | s390 | s390x \
                        | score \
                        | sh | shl \
                        | sh[1234] | sh[24]a | sh[24]ae[lb] | sh[23]e | she[lb] | sh[lb]e \
                        | sh[1234]e[lb] |  sh[12345][lb]e | sh[23]ele | sh64 | sh64le \
                        | sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet \
                        | sparclite \
                        | sparcv8 | sparcv9 | sparcv9b | sparcv9v | sv1 | sx* \
                        | spu \
                        | tahoe \
                        | tic30 | tic4x | tic54x | tic55x | tic6x | tic80 \
                        | tron \
                        | ubicom32 \
                        | v70 | v850 | v850e | v850e1 | v850es | v850e2 | v850e2v3 \
                        | vax \
                        | visium \
                        | w65 \
                        | wasm32 | wasm64 \
                        | we32k \
                        | x86 | x86_64 | xc16x | xgate | xps100 \
                        | xstormy16 | xtensa* \
                        | ymp \
                        | z8k | z80)
                                ;;

                        *)
                                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 caes, or perhaps split kernel-os, or else just
# set os.
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|')
                ;;
        *-*)
                # shellcheck disable=SC2162
                IFS="-" read kernel os <<EOF
$basic_os
EOF
                ;;
        # Default OS when just kernel was specified
        nto*)
                kernel=nto
                os=$(echo $basic_os | sed -e 's|nto|qnx|')
                ;;
        linux*)
                kernel=linux
                os=$(echo $basic_os | sed -e 's|linux|gnu|')
                ;;
        *)
                kernel=
                os=$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 $os | sed -e 's|solaris1|sunos4|')
                ;;
        solaris)
                os=solaris2
                ;;
        unixware*)
                os=sysv4.2uw
                ;;
        # es1800 is here to avoid being matched by es* (a different OS)
        es1800*)
                os=ose
                ;;
        # Some version numbers need modification
        chorusos*)
                os=chorusos
                ;;
        isc)
                os=isc2.2
                ;;
        sco6)
                os=sco5v6
                ;;
        sco5)
                os=sco3.2v5
                ;;
        sco4)
                os=sco3.2v4
                ;;
        sco3.2.[4-9]*)
                os=$(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 "$os" | sed -e 's|sunos6|solaris3|')
                ;;
        wince*)
                os=wince
                ;;
        utek*)
                os=bsd
                ;;
        dynix*)
                os=bsd
                ;;
        acis*)
                os=aos
                ;;
        atheos*)
                os=atheos
                ;;
        syllable*)
                os=syllable
                ;;
        386bsd)
                os=bsd
                ;;
        ctix* | uts*)
                os=sysv
                ;;
        nova*)
                os=rtmk-nova
                ;;
        ns2)
                os=nextstep2
                ;;
        # Preserve the version number of sinix5.
        sinix5.*)
                os=$(echo $os | sed -e 's|sinix|sysv|')
                ;;
        sinix*)
                os=sysv4
                ;;
        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=elf
                        ;;
                esac
                ;;
        *)
                # 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=
case $cpu-$vendor in
        score-*)
                os=elf
                ;;
        spu-*)
                os=elf
                ;;
        *-acorn)
                os=riscix1.2
                ;;
        arm*-rebel)
                kernel=linux
                os=gnu
                ;;
        arm*-semi)
                os=aout
                ;;
        c4x-* | tic4x-*)
                os=coff
                ;;
        c8051-*)
                os=elf
                ;;
        clipper-intergraph)
                os=clix
                ;;
        hexagon-*)
                os=elf
                ;;
        tic54x-*)
                os=coff
                ;;
        tic55x-*)
                os=coff
                ;;
        tic6x-*)
                os=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=aout
                ;;
        mep-*)
                os=elf
                ;;
        mips*-cisco)
                os=elf
                ;;
        mips*-*)
                os=elf
                ;;
        or32-*)
                os=coff
                ;;
        *-tti)  # must be before sparc entry or we get the wrong os.
                os=sysv3
                ;;
        sparc-* | *-sun)
                os=sunos4.1.1
                ;;
        pru-*)
                os=elf
                ;;
        *-be)
                os=beos
                ;;
        *-ibm)
                os=aix
                ;;
        *-knuth)
                os=mmixware
                ;;
        *-wec)
                os=proelf
                ;;
        *-winbond)
                os=proelf
                ;;
        *-oki)
                os=proelf
                ;;
        *-hp)
                os=hpux
                ;;
        *-hitachi)
                os=hiux
                ;;
        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
                ;;
        *-sgi)
                os=irix
                ;;
        *-siemens)
                os=sysv4
                ;;
        *-masscomp)
                os=rtu
                ;;
        f30[01]-fujitsu | f700-fujitsu)
                os=uxpv
                ;;
        *-rom68k)
                os=coff
                ;;
        *-*bug)
                os=coff
                ;;
        *-apple)
                os=macos
                ;;
        *-atari*)
                os=mint
                ;;
        *-wrs)
                os=vxworks
                ;;
        *)
                os=none
                ;;
esac

fi

# Now, validate our (potentially fixed-up) OS.
case $os in
        # Sometimes we do "kernel-abi", so those need to count as OSes.
        musl* | newlib* | uclibc*)
                ;;
        # Likewise for "kernel-libc"
        eabi | eabihf | gnueabi | gnueabihf)
                ;;
        # Now accept the basic system types.
        # The portable systems comes first.
        # Each alternative MUST end in a * to match a version number.
        gnu* | android* | bsd* | mach* | minix* | genix* | ultrix* | irix* \
             | *vms* | esix* | aix* | cnk* | sunos | sunos[34]* \
             | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
             | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
             | hiux* | abug | nacl* | netware* | windows* \
             | os9* | macos* | osx* | ios* \
             | mpw* | magic* | mmixware* | mon960* | lnews* \
             | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
             | aos* | aros* | cloudabi* | sortix* | twizzler* \
             | nindy* | vxsim* | vxworks* | ebmon* | hms* | mvs* \
             | clix* | riscos* | uniplus* | iris* | isc* | rtu* | xenix* \
             | mirbsd* | netbsd* | dicos* | openedition* | ose* \
             | bitrig* | openbsd* | solidbsd* | libertybsd* | os108* \
             | ekkobsd* | freebsd* | riscix* | lynxos* | os400* \
             | bosx* | nextstep* | cxux* | aout* | elf* | oabi* \
             | ptx* | coff* | ecoff* | winnt* | domain* | vsta* \
             | udi* | lites* | ieee* | go32* | aux* | hcos* \
             | chorusrdb* | cegcc* | glidix* \
             | cygwin* | msys* | pe* | moss* | proelf* | rtems* \
             | midipix* | mingw32* | mingw64* | mint* \
             | uxpv* | beos* | mpeix* | udk* | moxiebox* \
             | interix* | uwin* | mks* | rhapsody* | darwin* \
             | openstep* | oskit* | conix* | pw32* | nonstopux* \
             | storm-chaos* | tops10* | tenex* | tops20* | its* \
             | os2* | vos* | palmos* | uclinux* | nucleus* | morphos* \
             | scout* | superux* | sysv* | rtmk* | tpf* | windiss* \
             | powermax* | dnix* | nx6 | nx7 | sei* | dragonfly* \
             | skyos* | haiku* | rdos* | toppers* | drops* | es* \
             | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
             | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
             | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx*)
                ;;
        # 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.
                ;;
        none)
                ;;
        *)
                echo Invalid configuration \`"$1"\': OS \`"$os"\' not recognized 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 in
        linux-gnu* | linux-dietlibc* | linux-android* | linux-newlib* | linux-musl* | linux-uclibc* )
                ;;
        uclinux-uclibc* )
                ;;
        -dietlibc* | -newlib* | -musl* | -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
                ;;
        kfreebsd*-gnu* | kopensolaris*-gnu*)
                ;;
        nto-qnx*)
                ;;
        os2-emx)
                ;;
        *-eabi* | *-gnueabi*)
                ;;
        -*)
                # Blank kernel with real OS 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*)
                                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"
exit

# Local variables:
# eval: (add-hook 'before-save-hook 'time-stamp)
# time-stamp-start: "timestamp='"
# time-stamp-format: "%:y-%02m-%02d"
# time-stamp-end: "'"
# End: