Update config.sub and config.guess 58/287958/1
authorMarek Pikuła <m.pikula@partner.samsung.com>
Wed, 8 Feb 2023 07:31:35 +0000 (08:31 +0100)
committerMarek Pikuła <m.pikula@partner.samsung.com>
Wed, 8 Feb 2023 07:31:35 +0000 (08:31 +0100)
Change-Id: I43feede26c2f45f3e7a36822560fcc89a12ea0c5
Signed-off-by: Marek Pikuła <m.pikula@partner.samsung.com>
config.guess
config.sub

index e746461..69188da 100755 (executable)
@@ -1,12 +1,14 @@
 #! /bin/sh
 # Attempt to guess a canonical system name.
-#   Copyright 1992-2014 Free Software Foundation, Inc.
+#   Copyright 1992-2023 Free Software Foundation, Inc.
 
-timestamp='2014-11-04'
+# shellcheck disable=SC2006,SC2268 # see below for rationale
+
+timestamp='2023-01-01'
 
 # 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
+# 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
@@ -15,7 +17,7 @@ timestamp='2014-11-04'
 # 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 <http://www.gnu.org/licenses/>.
+# 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
@@ -27,11 +29,19 @@ timestamp='2014-11-04'
 # Originally written by Per Bothner; maintained since 2000 by Ben Elliston.
 #
 # You can get the latest version of this script from:
-# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
+# https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
 #
 # Please send patches to <config-patches@gnu.org>.
 
 
+# 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+# superseded or lifted in POSIX.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="\
@@ -39,7 +49,7 @@ Usage: $0 [OPTION]
 
 Output the configuration name of the system \`$me' is run on.
 
-Operation modes:
+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
@@ -50,7 +60,7 @@ version="\
 GNU config.guess ($timestamp)
 
 Originally written by Per Bothner.
-Copyright 1992-2014 Free Software Foundation, Inc.
+Copyright 1992-2023 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."
@@ -84,7 +94,8 @@ if test $# != 0; then
   exit 1
 fi
 
-trap 'exit 1' 1 2 15
+# Just in case it came from the environment.
+GUESS=
 
 # CC_FOR_BUILD -- compiler used by this script. Note that the use of a
 # compiler to aid in system detection is discouraged as it requires
@@ -96,66 +107,90 @@ trap 'exit 1' 1 2 15
 
 # Portable tmp directory creation inspired by the Autoconf team.
 
-set_cc_for_build='
-trap "exitcode=\$?; (rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null) && exit \$exitcode" 0 ;
-trap "rm -f \$tmpfiles 2>/dev/null; rmdir \$tmp 2>/dev/null; exit 1" 1 2 13 15 ;
-: ${TMPDIR=/tmp} ;
- { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
- { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir $tmp) ; } ||
- { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir $tmp) && echo "Warning: creating insecure temp directory" >&2 ; } ||
- { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; } ;
-dummy=$tmp/dummy ;
-tmpfiles="$dummy.c $dummy.o $dummy.rel $dummy" ;
-case $CC_FOR_BUILD,$HOST_CC,$CC in
- ,,)    echo "int x;" > $dummy.c ;
-       for c in cc gcc c89 c99 ; do
-         if ($c -c -o $dummy.o $dummy.c) >/dev/null 2>&1 ; then
-            CC_FOR_BUILD="$c"; break ;
-         fi ;
-       done ;
-       if test x"$CC_FOR_BUILD" = x ; then
-         CC_FOR_BUILD=no_compiler_found ;
-       fi
-       ;;
- ,,*)   CC_FOR_BUILD=$CC ;;
- ,*,*)  CC_FOR_BUILD=$HOST_CC ;;
-esac ; set_cc_for_build= ;'
+tmp=
+# shellcheck disable=SC2172
+trap 'test -z "$tmp" || rm -fr "$tmp"' 0 1 2 13 15
+
+set_cc_for_build() {
+    # prevent multiple calls if $tmp is already set
+    test "$tmp" && return 0
+    : "${TMPDIR=/tmp}"
+    # shellcheck disable=SC2039,SC3028
+    { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
+       { test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir "$tmp" 2>/dev/null) ; } ||
+       { tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir "$tmp" 2>/dev/null) && echo "Warning: creating insecure temp directory" >&2 ; } ||
+       { echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; }
+    dummy=$tmp/dummy
+    case ${CC_FOR_BUILD-},${HOST_CC-},${CC-} in
+       ,,)    echo "int x;" > "$dummy.c"
+              for driver in cc gcc c89 c99 ; do
+                  if ($driver -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then
+                      CC_FOR_BUILD=$driver
+                      break
+                  fi
+              done
+              if test x"$CC_FOR_BUILD" = x ; then
+                  CC_FOR_BUILD=no_compiler_found
+              fi
+              ;;
+       ,,*)   CC_FOR_BUILD=$CC ;;
+       ,*,*)  CC_FOR_BUILD=$HOST_CC ;;
+    esac
+}
 
 # This is needed to find uname on a Pyramid OSx when run in the BSD universe.
 # (ghazi@noc.rutgers.edu 1994-08-24)
-if (test -f /.attbin/uname) >/dev/null 2>&1 ; then
+if test -f /.attbin/uname ; then
        PATH=$PATH:/.attbin ; export PATH
 fi
 
 UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
 UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
-UNAME_SYSTEM=`(uname -s) 2>/dev/null`  || UNAME_SYSTEM=unknown
+UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown
 UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
 
-case "${UNAME_SYSTEM}" in
+case $UNAME_SYSTEM in
 Linux|GNU|GNU/*)
-       # If the system lacks a compiler, then just pick glibc.
-       # We could probably try harder.
-       LIBC=gnu
+       LIBC=unknown
 
-       eval $set_cc_for_build
-       cat <<-EOF > $dummy.c
+       set_cc_for_build
+       cat <<-EOF > "$dummy.c"
        #include <features.h>
        #if defined(__UCLIBC__)
        LIBC=uclibc
        #elif defined(__dietlibc__)
        LIBC=dietlibc
-       #else
+       #elif defined(__GLIBC__)
        LIBC=gnu
+       #else
+       #include <stdarg.h>
+       /* First heuristic to detect musl libc.  */
+       #ifdef __DEFINED_va_list
+       LIBC=musl
+       #endif
        #endif
        EOF
-       eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
+       cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
+       eval "$cc_set_libc"
+
+       # Second heuristic to detect musl libc.
+       if [ "$LIBC" = unknown ] &&
+          command -v ldd >/dev/null &&
+          ldd --version 2>&1 | grep -q ^musl; then
+               LIBC=musl
+       fi
+
+       # If the system lacks a compiler, then just pick glibc.
+       # We could probably try harder.
+       if [ "$LIBC" = unknown ]; then
+               LIBC=gnu
+       fi
        ;;
 esac
 
 # Note: order is significant - the case branches are not exclusive.
 
-case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
+case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in
     *:NetBSD:*:*)
        # NetBSD (nbsd) targets should (where applicable) match one or
        # more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*,
@@ -167,22 +202,32 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
        #
        # Note: NetBSD doesn't particularly care about the vendor
        # portion of the name.  We always set it to "unknown".
-       sysctl="sysctl -n hw.machine_arch"
-       UNAME_MACHINE_ARCH=`(/sbin/$sysctl 2>/dev/null || \
-           /usr/sbin/$sysctl 2>/dev/null || echo unknown)`
-       case "${UNAME_MACHINE_ARCH}" in
+       UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \
+           /sbin/sysctl -n hw.machine_arch 2>/dev/null || \
+           /usr/sbin/sysctl -n hw.machine_arch 2>/dev/null || \
+           echo unknown)`
+       case $UNAME_MACHINE_ARCH in
+           aarch64eb) machine=aarch64_be-unknown ;;
            armeb) machine=armeb-unknown ;;
            arm*) machine=arm-unknown ;;
            sh3el) machine=shl-unknown ;;
            sh3eb) machine=sh-unknown ;;
            sh5el) machine=sh5le-unknown ;;
-           *) machine=${UNAME_MACHINE_ARCH}-unknown ;;
+           earmv*)
+               arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'`
+               endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'`
+               machine=${arch}${endian}-unknown
+               ;;
+           *) machine=$UNAME_MACHINE_ARCH-unknown ;;
        esac
        # The Operating System including object format, if it has switched
-       # to ELF recently, or will in the future.
-       case "${UNAME_MACHINE_ARCH}" in
+       # to ELF recently (or will in the future) and ABI.
+       case $UNAME_MACHINE_ARCH in
+           earm*)
+               os=netbsdelf
+               ;;
            arm*|i386|m68k|ns32k|sh3*|sparc|vax)
-               eval $set_cc_for_build
+               set_cc_for_build
                if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
                        | grep -q __ELF__
                then
@@ -197,45 +242,80 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
                os=netbsd
                ;;
        esac
+       # Determine ABI tags.
+       case $UNAME_MACHINE_ARCH in
+           earm*)
+               expr='s/^earmv[0-9]/-eabi/;s/eb$//'
+               abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"`
+               ;;
+       esac
        # The OS release
        # Debian GNU/NetBSD machines have a different userland, and
        # thus, need a distinct triplet. However, they do not need
        # kernel version information, so it can be replaced with a
        # suitable tag, in the style of linux-gnu.
-       case "${UNAME_VERSION}" in
+       case $UNAME_VERSION in
            Debian*)
                release='-gnu'
                ;;
            *)
-               release=`echo ${UNAME_RELEASE}|sed -e 's/[-_].*/\./'`
+               release=`echo "$UNAME_RELEASE" | sed -e 's/[-_].*//' | cut -d. -f1,2`
                ;;
        esac
        # Since CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM:
        # contains redundant information, the shorter form:
        # CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM is used.
-       echo "${machine}-${os}${release}"
-       exit ;;
+       GUESS=$machine-${os}${release}${abi-}
+       ;;
     *:Bitrig:*:*)
        UNAME_MACHINE_ARCH=`arch | sed 's/Bitrig.//'`
-       echo ${UNAME_MACHINE_ARCH}-unknown-bitrig${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE_ARCH-unknown-bitrig$UNAME_RELEASE
+       ;;
     *:OpenBSD:*:*)
        UNAME_MACHINE_ARCH=`arch | sed 's/OpenBSD.//'`
-       echo ${UNAME_MACHINE_ARCH}-unknown-openbsd${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE_ARCH-unknown-openbsd$UNAME_RELEASE
+       ;;
+    *:SecBSD:*:*)
+       UNAME_MACHINE_ARCH=`arch | sed 's/SecBSD.//'`
+       GUESS=$UNAME_MACHINE_ARCH-unknown-secbsd$UNAME_RELEASE
+       ;;
+    *:LibertyBSD:*:*)
+       UNAME_MACHINE_ARCH=`arch | sed 's/^.*BSD\.//'`
+       GUESS=$UNAME_MACHINE_ARCH-unknown-libertybsd$UNAME_RELEASE
+       ;;
+    *:MidnightBSD:*:*)
+       GUESS=$UNAME_MACHINE-unknown-midnightbsd$UNAME_RELEASE
+       ;;
     *:ekkoBSD:*:*)
-       echo ${UNAME_MACHINE}-unknown-ekkobsd${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-ekkobsd$UNAME_RELEASE
+       ;;
     *:SolidBSD:*:*)
-       echo ${UNAME_MACHINE}-unknown-solidbsd${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-solidbsd$UNAME_RELEASE
+       ;;
+    *:OS108:*:*)
+       GUESS=$UNAME_MACHINE-unknown-os108_$UNAME_RELEASE
+       ;;
     macppc:MirBSD:*:*)
-       echo powerpc-unknown-mirbsd${UNAME_RELEASE}
-       exit ;;
+       GUESS=powerpc-unknown-mirbsd$UNAME_RELEASE
+       ;;
     *:MirBSD:*:*)
-       echo ${UNAME_MACHINE}-unknown-mirbsd${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-mirbsd$UNAME_RELEASE
+       ;;
+    *:Sortix:*:*)
+       GUESS=$UNAME_MACHINE-unknown-sortix
+       ;;
+    *:Twizzler:*:*)
+       GUESS=$UNAME_MACHINE-unknown-twizzler
+       ;;
+    *:Redox:*:*)
+       GUESS=$UNAME_MACHINE-unknown-redox
+       ;;
+    mips:OSF1:*.*)
+       GUESS=mips-dec-osf1
+       ;;
     alpha:OSF1:*:*)
+       # Reset EXIT trap before exiting to avoid spurious non-zero exit code.
+       trap '' 0
        case $UNAME_RELEASE in
        *4.0)
                UNAME_RELEASE=`/usr/sbin/sizer -v | awk '{print $3}'`
@@ -249,163 +329,158 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
        # covers most systems running today.  This code pipes the CPU
        # types through head -n 1, so we only detect the type of CPU 0.
        ALPHA_CPU_TYPE=`/usr/sbin/psrinfo -v | sed -n -e 's/^  The alpha \(.*\) processor.*$/\1/p' | head -n 1`
-       case "$ALPHA_CPU_TYPE" in
+       case $ALPHA_CPU_TYPE in
            "EV4 (21064)")
-               UNAME_MACHINE="alpha" ;;
+               UNAME_MACHINE=alpha ;;
            "EV4.5 (21064)")
-               UNAME_MACHINE="alpha" ;;
+               UNAME_MACHINE=alpha ;;
            "LCA4 (21066/21068)")
-               UNAME_MACHINE="alpha" ;;
+               UNAME_MACHINE=alpha ;;
            "EV5 (21164)")
-               UNAME_MACHINE="alphaev5" ;;
+               UNAME_MACHINE=alphaev5 ;;
            "EV5.6 (21164A)")
-               UNAME_MACHINE="alphaev56" ;;
+               UNAME_MACHINE=alphaev56 ;;
            "EV5.6 (21164PC)")
-               UNAME_MACHINE="alphapca56" ;;
+               UNAME_MACHINE=alphapca56 ;;
            "EV5.7 (21164PC)")
-               UNAME_MACHINE="alphapca57" ;;
+               UNAME_MACHINE=alphapca57 ;;
            "EV6 (21264)")
-               UNAME_MACHINE="alphaev6" ;;
+               UNAME_MACHINE=alphaev6 ;;
            "EV6.7 (21264A)")
-               UNAME_MACHINE="alphaev67" ;;
+               UNAME_MACHINE=alphaev67 ;;
            "EV6.8CB (21264C)")
-               UNAME_MACHINE="alphaev68" ;;
+               UNAME_MACHINE=alphaev68 ;;
            "EV6.8AL (21264B)")
-               UNAME_MACHINE="alphaev68" ;;
+               UNAME_MACHINE=alphaev68 ;;
            "EV6.8CX (21264D)")
-               UNAME_MACHINE="alphaev68" ;;
+               UNAME_MACHINE=alphaev68 ;;
            "EV6.9A (21264/EV69A)")
-               UNAME_MACHINE="alphaev69" ;;
+               UNAME_MACHINE=alphaev69 ;;
            "EV7 (21364)")
-               UNAME_MACHINE="alphaev7" ;;
+               UNAME_MACHINE=alphaev7 ;;
            "EV7.9 (21364A)")
-               UNAME_MACHINE="alphaev79" ;;
+               UNAME_MACHINE=alphaev79 ;;
        esac
        # A Pn.n version is a patched version.
        # A Vn.n version is a released version.
        # A Tn.n version is a released field test version.
        # A Xn.n version is an unreleased experimental baselevel.
        # 1.2 uses "1.2" for uname -r.
-       echo ${UNAME_MACHINE}-dec-osf`echo ${UNAME_RELEASE} | sed -e 's/^[PVTX]//' | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-       # Reset EXIT trap before exiting to avoid spurious non-zero exit code.
-       exitcode=$?
-       trap '' 0
-       exit $exitcode ;;
-    Alpha\ *:Windows_NT*:*)
-       # How do we know it's Interix rather than the generic POSIX subsystem?
-       # Should we change UNAME_MACHINE based on the output of uname instead
-       # of the specific Alpha model?
-       echo alpha-pc-interix
-       exit ;;
-    21064:Windows_NT:50:3)
-       echo alpha-dec-winnt3.5
-       exit ;;
+       OSF_REL=`echo "$UNAME_RELEASE" | sed -e 's/^[PVTX]//' | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
+       GUESS=$UNAME_MACHINE-dec-osf$OSF_REL
+       ;;
     Amiga*:UNIX_System_V:4.0:*)
-       echo m68k-unknown-sysv4
-       exit ;;
+       GUESS=m68k-unknown-sysv4
+       ;;
     *:[Aa]miga[Oo][Ss]:*:*)
-       echo ${UNAME_MACHINE}-unknown-amigaos
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-amigaos
+       ;;
     *:[Mm]orph[Oo][Ss]:*:*)
-       echo ${UNAME_MACHINE}-unknown-morphos
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-morphos
+       ;;
     *:OS/390:*:*)
-       echo i370-ibm-openedition
-       exit ;;
+       GUESS=i370-ibm-openedition
+       ;;
     *:z/VM:*:*)
-       echo s390-ibm-zvmoe
-       exit ;;
+       GUESS=s390-ibm-zvmoe
+       ;;
     *:OS400:*:*)
-       echo powerpc-ibm-os400
-       exit ;;
+       GUESS=powerpc-ibm-os400
+       ;;
     arm:RISC*:1.[012]*:*|arm:riscix:1.[012]*:*)
-       echo arm-acorn-riscix${UNAME_RELEASE}
-       exit ;;
+       GUESS=arm-acorn-riscix$UNAME_RELEASE
+       ;;
     arm*:riscos:*:*|arm*:RISCOS:*:*)
-       echo arm-unknown-riscos
-       exit ;;
+       GUESS=arm-unknown-riscos
+       ;;
     SR2?01:HI-UX/MPP:*:* | SR8000:HI-UX/MPP:*:*)
-       echo hppa1.1-hitachi-hiuxmpp
-       exit ;;
+       GUESS=hppa1.1-hitachi-hiuxmpp
+       ;;
     Pyramid*:OSx*:*:* | MIS*:OSx*:*:* | MIS*:SMP_DC-OSx*:*:*)
        # akee@wpdis03.wpafb.af.mil (Earle F. Ake) contributed MIS and NILE.
-       if test "`(/bin/universe) 2>/dev/null`" = att ; then
-               echo pyramid-pyramid-sysv3
-       else
-               echo pyramid-pyramid-bsd
-       fi
-       exit ;;
+       case `(/bin/universe) 2>/dev/null` in
+           att) GUESS=pyramid-pyramid-sysv3 ;;
+           *)   GUESS=pyramid-pyramid-bsd   ;;
+       esac
+       ;;
     NILE*:*:*:dcosx)
-       echo pyramid-pyramid-svr4
-       exit ;;
+       GUESS=pyramid-pyramid-svr4
+       ;;
     DRS?6000:unix:4.0:6*)
-       echo sparc-icl-nx6
-       exit ;;
+       GUESS=sparc-icl-nx6
+       ;;
     DRS?6000:UNIX_SV:4.2*:7* | DRS?6000:isis:4.2*:7*)
        case `/usr/bin/uname -p` in
-           sparc) echo sparc-icl-nx7; exit ;;
-       esac ;;
+           sparc) GUESS=sparc-icl-nx7 ;;
+       esac
+       ;;
     s390x:SunOS:*:*)
-       echo ${UNAME_MACHINE}-ibm-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+       GUESS=$UNAME_MACHINE-ibm-solaris2$SUN_REL
+       ;;
     sun4H:SunOS:5.*:*)
-       echo sparc-hal-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+       GUESS=sparc-hal-solaris2$SUN_REL
+       ;;
     sun4*:SunOS:5.*:* | tadpole*:SunOS:5.*:*)
-       echo sparc-sun-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+       GUESS=sparc-sun-solaris2$SUN_REL
+       ;;
     i86pc:AuroraUX:5.*:* | i86xen:AuroraUX:5.*:*)
-       echo i386-pc-auroraux${UNAME_RELEASE}
-       exit ;;
+       GUESS=i386-pc-auroraux$UNAME_RELEASE
+       ;;
     i86pc:SunOS:5.*:* | i86xen:SunOS:5.*:*)
-       eval $set_cc_for_build
-       SUN_ARCH="i386"
+       set_cc_for_build
+       SUN_ARCH=i386
        # If there is a compiler, see if it is configured for 64-bit objects.
        # Note that the Sun cc does not turn __LP64__ into 1 like gcc does.
        # This test works for both compilers.
-       if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
+       if test "$CC_FOR_BUILD" != no_compiler_found; then
            if (echo '#ifdef __amd64'; echo IS_64BIT_ARCH; echo '#endif') | \
-               (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
+               (CCOPTS="" $CC_FOR_BUILD -m64 -E - 2>/dev/null) | \
                grep IS_64BIT_ARCH >/dev/null
            then
-               SUN_ARCH="x86_64"
+               SUN_ARCH=x86_64
            fi
        fi
-       echo ${SUN_ARCH}-pc-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+       GUESS=$SUN_ARCH-pc-solaris2$SUN_REL
+       ;;
     sun4*:SunOS:6*:*)
        # According to config.sub, this is the proper way to canonicalize
        # SunOS6.  Hard to guess exactly what SunOS6 will be like, but
        # it's likely to be more like Solaris than SunOS4.
-       echo sparc-sun-solaris3`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+       GUESS=sparc-sun-solaris3$SUN_REL
+       ;;
     sun4*:SunOS:*:*)
-       case "`/usr/bin/arch -k`" in
+       case `/usr/bin/arch -k` in
            Series*|S4*)
                UNAME_RELEASE=`uname -v`
                ;;
        esac
        # Japanese Language versions have a version number like `4.1.3-JL'.
-       echo sparc-sun-sunos`echo ${UNAME_RELEASE}|sed -e 's/-/_/'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/'`
+       GUESS=sparc-sun-sunos$SUN_REL
+       ;;
     sun3*:SunOS:*:*)
-       echo m68k-sun-sunos${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-sun-sunos$UNAME_RELEASE
+       ;;
     sun*:*:4.2BSD:*)
        UNAME_RELEASE=`(sed 1q /etc/motd | awk '{print substr($5,1,3)}') 2>/dev/null`
-       test "x${UNAME_RELEASE}" = "x" && UNAME_RELEASE=3
-       case "`/bin/arch`" in
+       test "x$UNAME_RELEASE" = x && UNAME_RELEASE=3
+       case `/bin/arch` in
            sun3)
-               echo m68k-sun-sunos${UNAME_RELEASE}
+               GUESS=m68k-sun-sunos$UNAME_RELEASE
                ;;
            sun4)
-               echo sparc-sun-sunos${UNAME_RELEASE}
+               GUESS=sparc-sun-sunos$UNAME_RELEASE
                ;;
        esac
-       exit ;;
+       ;;
     aushp:SunOS:*:*)
-       echo sparc-auspex-sunos${UNAME_RELEASE}
-       exit ;;
+       GUESS=sparc-auspex-sunos$UNAME_RELEASE
+       ;;
     # The situation for MiNT is a little confusing.  The machine name
     # can be virtually everything (everything which is not
     # "atarist" or "atariste" at least should have a processor
@@ -415,44 +490,44 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
     # MiNT.  But MiNT is downward compatible to TOS, so this should
     # be no problem.
     atarist[e]:*MiNT:*:* | atarist[e]:*mint:*:* | atarist[e]:*TOS:*:*)
-       echo m68k-atari-mint${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-atari-mint$UNAME_RELEASE
+       ;;
     atari*:*MiNT:*:* | atari*:*mint:*:* | atarist[e]:*TOS:*:*)
-       echo m68k-atari-mint${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-atari-mint$UNAME_RELEASE
+       ;;
     *falcon*:*MiNT:*:* | *falcon*:*mint:*:* | *falcon*:*TOS:*:*)
-       echo m68k-atari-mint${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-atari-mint$UNAME_RELEASE
+       ;;
     milan*:*MiNT:*:* | milan*:*mint:*:* | *milan*:*TOS:*:*)
-       echo m68k-milan-mint${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-milan-mint$UNAME_RELEASE
+       ;;
     hades*:*MiNT:*:* | hades*:*mint:*:* | *hades*:*TOS:*:*)
-       echo m68k-hades-mint${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-hades-mint$UNAME_RELEASE
+       ;;
     *:*MiNT:*:* | *:*mint:*:* | *:*TOS:*:*)
-       echo m68k-unknown-mint${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-unknown-mint$UNAME_RELEASE
+       ;;
     m68k:machten:*:*)
-       echo m68k-apple-machten${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-apple-machten$UNAME_RELEASE
+       ;;
     powerpc:machten:*:*)
-       echo powerpc-apple-machten${UNAME_RELEASE}
-       exit ;;
+       GUESS=powerpc-apple-machten$UNAME_RELEASE
+       ;;
     RISC*:Mach:*:*)
-       echo mips-dec-mach_bsd4.3
-       exit ;;
+       GUESS=mips-dec-mach_bsd4.3
+       ;;
     RISC*:ULTRIX:*:*)
-       echo mips-dec-ultrix${UNAME_RELEASE}
-       exit ;;
+       GUESS=mips-dec-ultrix$UNAME_RELEASE
+       ;;
     VAX*:ULTRIX*:*:*)
-       echo vax-dec-ultrix${UNAME_RELEASE}
-       exit ;;
+       GUESS=vax-dec-ultrix$UNAME_RELEASE
+       ;;
     2020:CLIX:*:* | 2430:CLIX:*:*)
-       echo clipper-intergraph-clix${UNAME_RELEASE}
-       exit ;;
+       GUESS=clipper-intergraph-clix$UNAME_RELEASE
+       ;;
     mips:*:*:UMIPS | mips:*:*:RISCos)
-       eval $set_cc_for_build
-       sed 's/^        //' << EOF >$dummy.c
+       set_cc_for_build
+       sed 's/^        //' << EOF > "$dummy.c"
 #ifdef __cplusplus
 #include <stdio.h>  /* for printf() prototype */
        int main (int argc, char *argv[]) {
@@ -461,95 +536,96 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
 #endif
        #if defined (host_mips) && defined (MIPSEB)
        #if defined (SYSTYPE_SYSV)
-         printf ("mips-mips-riscos%ssysv\n", argv[1]); exit (0);
+         printf ("mips-mips-riscos%ssysv\\n", argv[1]); exit (0);
        #endif
        #if defined (SYSTYPE_SVR4)
-         printf ("mips-mips-riscos%ssvr4\n", argv[1]); exit (0);
+         printf ("mips-mips-riscos%ssvr4\\n", argv[1]); exit (0);
        #endif
        #if defined (SYSTYPE_BSD43) || defined(SYSTYPE_BSD)
-         printf ("mips-mips-riscos%sbsd\n", argv[1]); exit (0);
+         printf ("mips-mips-riscos%sbsd\\n", argv[1]); exit (0);
        #endif
        #endif
          exit (-1);
        }
 EOF
-       $CC_FOR_BUILD -o $dummy $dummy.c &&
-         dummyarg=`echo "${UNAME_RELEASE}" | sed -n 's/\([0-9]*\).*/\1/p'` &&
-         SYSTEM_NAME=`$dummy $dummyarg` &&
+       $CC_FOR_BUILD -o "$dummy" "$dummy.c" &&
+         dummyarg=`echo "$UNAME_RELEASE" | sed -n 's/\([0-9]*\).*/\1/p'` &&
+         SYSTEM_NAME=`"$dummy" "$dummyarg"` &&
            { echo "$SYSTEM_NAME"; exit; }
-       echo mips-mips-riscos${UNAME_RELEASE}
-       exit ;;
+       GUESS=mips-mips-riscos$UNAME_RELEASE
+       ;;
     Motorola:PowerMAX_OS:*:*)
-       echo powerpc-motorola-powermax
-       exit ;;
+       GUESS=powerpc-motorola-powermax
+       ;;
     Motorola:*:4.3:PL8-*)
-       echo powerpc-harris-powermax
-       exit ;;
+       GUESS=powerpc-harris-powermax
+       ;;
     Night_Hawk:*:*:PowerMAX_OS | Synergy:PowerMAX_OS:*:*)
-       echo powerpc-harris-powermax
-       exit ;;
+       GUESS=powerpc-harris-powermax
+       ;;
     Night_Hawk:Power_UNIX:*:*)
-       echo powerpc-harris-powerunix
-       exit ;;
+       GUESS=powerpc-harris-powerunix
+       ;;
     m88k:CX/UX:7*:*)
-       echo m88k-harris-cxux7
-       exit ;;
+       GUESS=m88k-harris-cxux7
+       ;;
     m88k:*:4*:R4*)
-       echo m88k-motorola-sysv4
-       exit ;;
+       GUESS=m88k-motorola-sysv4
+       ;;
     m88k:*:3*:R3*)
-       echo m88k-motorola-sysv3
-       exit ;;
+       GUESS=m88k-motorola-sysv3
+       ;;
     AViiON:dgux:*:*)
        # DG/UX returns AViiON for all architectures
        UNAME_PROCESSOR=`/usr/bin/uname -p`
-       if [ $UNAME_PROCESSOR = mc88100 ] || [ $UNAME_PROCESSOR = mc88110 ]
+       if test "$UNAME_PROCESSOR" = mc88100 || test "$UNAME_PROCESSOR" = mc88110
        then
-           if [ ${TARGET_BINARY_INTERFACE}x = m88kdguxelfx ] || \
-              [ ${TARGET_BINARY_INTERFACE}x = x ]
+           if test "$TARGET_BINARY_INTERFACE"x = m88kdguxelfx || \
+              test "$TARGET_BINARY_INTERFACE"x = x
            then
-               echo m88k-dg-dgux${UNAME_RELEASE}
+               GUESS=m88k-dg-dgux$UNAME_RELEASE
            else
-               echo m88k-dg-dguxbcs${UNAME_RELEASE}
+               GUESS=m88k-dg-dguxbcs$UNAME_RELEASE
            fi
        else
-           echo i586-dg-dgux${UNAME_RELEASE}
+           GUESS=i586-dg-dgux$UNAME_RELEASE
        fi
-       exit ;;
+       ;;
     M88*:DolphinOS:*:*)        # DolphinOS (SVR3)
-       echo m88k-dolphin-sysv3
-       exit ;;
+       GUESS=m88k-dolphin-sysv3
+       ;;
     M88*:*:R3*:*)
        # Delta 88k system running SVR3
-       echo m88k-motorola-sysv3
-       exit ;;
+       GUESS=m88k-motorola-sysv3
+       ;;
     XD88*:*:*:*) # Tektronix XD88 system running UTekV (SVR3)
-       echo m88k-tektronix-sysv3
-       exit ;;
+       GUESS=m88k-tektronix-sysv3
+       ;;
     Tek43[0-9][0-9]:UTek:*:*) # Tektronix 4300 system running UTek (BSD)
-       echo m68k-tektronix-bsd
-       exit ;;
+       GUESS=m68k-tektronix-bsd
+       ;;
     *:IRIX*:*:*)
-       echo mips-sgi-irix`echo ${UNAME_RELEASE}|sed -e 's/-/_/g'`
-       exit ;;
+       IRIX_REL=`echo "$UNAME_RELEASE" | sed -e 's/-/_/g'`
+       GUESS=mips-sgi-irix$IRIX_REL
+       ;;
     ????????:AIX?:[12].1:2)   # AIX 2.2.1 or AIX 2.1.1 is RT/PC AIX.
-       echo romp-ibm-aix     # uname -m gives an 8 hex-code CPU id
-       exit ;;               # Note that: echo "'`uname -s`'" gives 'AIX '
+       GUESS=romp-ibm-aix    # uname -m gives an 8 hex-code CPU id
+       ;;                    # Note that: echo "'`uname -s`'" gives 'AIX '
     i*86:AIX:*:*)
-       echo i386-ibm-aix
-       exit ;;
+       GUESS=i386-ibm-aix
+       ;;
     ia64:AIX:*:*)
-       if [ -x /usr/bin/oslevel ] ; then
+       if test -x /usr/bin/oslevel ; then
                IBM_REV=`/usr/bin/oslevel`
        else
-               IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
+               IBM_REV=$UNAME_VERSION.$UNAME_RELEASE
        fi
-       echo ${UNAME_MACHINE}-ibm-aix${IBM_REV}
-       exit ;;
+       GUESS=$UNAME_MACHINE-ibm-aix$IBM_REV
+       ;;
     *:AIX:2:3)
        if grep bos325 /usr/include/stdio.h >/dev/null 2>&1; then
-               eval $set_cc_for_build
-               sed 's/^                //' << EOF >$dummy.c
+               set_cc_for_build
+               sed 's/^                //' << EOF > "$dummy.c"
                #include <sys/systemcfg.h>
 
                main()
@@ -560,77 +636,77 @@ EOF
                        exit(0);
                        }
 EOF
-               if $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy`
+               if $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"`
                then
-                       echo "$SYSTEM_NAME"
+                       GUESS=$SYSTEM_NAME
                else
-                       echo rs6000-ibm-aix3.2.5
+                       GUESS=rs6000-ibm-aix3.2.5
                fi
        elif grep bos324 /usr/include/stdio.h >/dev/null 2>&1; then
-               echo rs6000-ibm-aix3.2.4
+               GUESS=rs6000-ibm-aix3.2.4
        else
-               echo rs6000-ibm-aix3.2
+               GUESS=rs6000-ibm-aix3.2
        fi
-       exit ;;
+       ;;
     *:AIX:*:[4567])
        IBM_CPU_ID=`/usr/sbin/lsdev -C -c processor -S available | sed 1q | awk '{ print $1 }'`
-       if /usr/sbin/lsattr -El ${IBM_CPU_ID} | grep ' POWER' >/dev/null 2>&1; then
+       if /usr/sbin/lsattr -El "$IBM_CPU_ID" | grep ' POWER' >/dev/null 2>&1; then
                IBM_ARCH=rs6000
        else
                IBM_ARCH=powerpc
        fi
-       if [ -x /usr/bin/lslpp ] ; then
-               IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc |
+       if test -x /usr/bin/lslpp ; then
+               IBM_REV=`/usr/bin/lslpp -Lqc bos.rte.libc | \
                           awk -F: '{ print $3 }' | sed s/[0-9]*$/0/`
        else
-               IBM_REV=${UNAME_VERSION}.${UNAME_RELEASE}
+               IBM_REV=$UNAME_VERSION.$UNAME_RELEASE
        fi
-       echo ${IBM_ARCH}-ibm-aix${IBM_REV}
-       exit ;;
+       GUESS=$IBM_ARCH-ibm-aix$IBM_REV
+       ;;
     *:AIX:*:*)
-       echo rs6000-ibm-aix
-       exit ;;
-    ibmrt:4.4BSD:*|romp-ibm:BSD:*)
-       echo romp-ibm-bsd4.4
-       exit ;;
+       GUESS=rs6000-ibm-aix
+       ;;
+    ibmrt:4.4BSD:*|romp-ibm:4.4BSD:*)
+       GUESS=romp-ibm-bsd4.4
+       ;;
     ibmrt:*BSD:*|romp-ibm:BSD:*)            # covers RT/PC BSD and
-       echo romp-ibm-bsd${UNAME_RELEASE}   # 4.3 with uname added to
-       exit ;;                             # report: romp-ibm BSD 4.3
+       GUESS=romp-ibm-bsd$UNAME_RELEASE    # 4.3 with uname added to
+       ;;                                  # report: romp-ibm BSD 4.3
     *:BOSX:*:*)
-       echo rs6000-bull-bosx
-       exit ;;
+       GUESS=rs6000-bull-bosx
+       ;;
     DPX/2?00:B.O.S.:*:*)
-       echo m68k-bull-sysv3
-       exit ;;
+       GUESS=m68k-bull-sysv3
+       ;;
     9000/[34]??:4.3bsd:1.*:*)
-       echo m68k-hp-bsd
-       exit ;;
+       GUESS=m68k-hp-bsd
+       ;;
     hp300:4.4BSD:*:* | 9000/[34]??:4.3bsd:2.*:*)
-       echo m68k-hp-bsd4.4
-       exit ;;
+       GUESS=m68k-hp-bsd4.4
+       ;;
     9000/[34678]??:HP-UX:*:*)
-       HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
-       case "${UNAME_MACHINE}" in
-           9000/31? )            HP_ARCH=m68000 ;;
-           9000/[34]?? )         HP_ARCH=m68k ;;
+       HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'`
+       case $UNAME_MACHINE in
+           9000/31?)            HP_ARCH=m68000 ;;
+           9000/[34]??)         HP_ARCH=m68k ;;
            9000/[678][0-9][0-9])
-               if [ -x /usr/bin/getconf ]; then
+               if test -x /usr/bin/getconf; then
                    sc_cpu_version=`/usr/bin/getconf SC_CPU_VERSION 2>/dev/null`
                    sc_kernel_bits=`/usr/bin/getconf SC_KERNEL_BITS 2>/dev/null`
-                   case "${sc_cpu_version}" in
-                     523) HP_ARCH="hppa1.0" ;; # CPU_PA_RISC1_0
-                     528) HP_ARCH="hppa1.1" ;; # CPU_PA_RISC1_1
+                   case $sc_cpu_version in
+                     523) HP_ARCH=hppa1.0 ;; # CPU_PA_RISC1_0
+                     528) HP_ARCH=hppa1.1 ;; # CPU_PA_RISC1_1
                      532)                      # CPU_PA_RISC2_0
-                       case "${sc_kernel_bits}" in
-                         32) HP_ARCH="hppa2.0n" ;;
-                         64) HP_ARCH="hppa2.0w" ;;
-                         '') HP_ARCH="hppa2.0" ;;   # HP-UX 10.20
+                       case $sc_kernel_bits in
+                         32) HP_ARCH=hppa2.0n ;;
+                         64) HP_ARCH=hppa2.0w ;;
+                         '') HP_ARCH=hppa2.0 ;;   # HP-UX 10.20
                        esac ;;
                    esac
                fi
-               if [ "${HP_ARCH}" = "" ]; then
-                   eval $set_cc_for_build
-                   sed 's/^            //' << EOF >$dummy.c
+               if test "$HP_ARCH" = ""; then
+                   set_cc_for_build
+                   sed 's/^            //' << EOF > "$dummy.c"
 
                #define _HPUX_SOURCE
                #include <stdlib.h>
@@ -663,13 +739,13 @@ EOF
                    exit (0);
                }
 EOF
-                   (CCOPTS= $CC_FOR_BUILD -o $dummy $dummy.c 2>/dev/null) && HP_ARCH=`$dummy`
+                   (CCOPTS="" $CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null) && HP_ARCH=`"$dummy"`
                    test -z "$HP_ARCH" && HP_ARCH=hppa
                fi ;;
        esac
-       if [ ${HP_ARCH} = "hppa2.0w" ]
+       if test "$HP_ARCH" = hppa2.0w
        then
-           eval $set_cc_for_build
+           set_cc_for_build
 
            # hppa2.0w-hp-hpux* has a 64-bit kernel and a compiler generating
            # 32-bit code.  hppa64-hp-hpux* has the same kernel and a compiler
@@ -680,23 +756,23 @@ EOF
            # $ CC_FOR_BUILD="cc +DA2.0w" ./config.guess
            # => hppa64-hp-hpux11.23
 
-           if echo __LP64__ | (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) |
+           if echo __LP64__ | (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) |
                grep -q __LP64__
            then
-               HP_ARCH="hppa2.0w"
+               HP_ARCH=hppa2.0w
            else
-               HP_ARCH="hppa64"
+               HP_ARCH=hppa64
            fi
        fi
-       echo ${HP_ARCH}-hp-hpux${HPUX_REV}
-       exit ;;
+       GUESS=$HP_ARCH-hp-hpux$HPUX_REV
+       ;;
     ia64:HP-UX:*:*)
-       HPUX_REV=`echo ${UNAME_RELEASE}|sed -e 's/[^.]*.[0B]*//'`
-       echo ia64-hp-hpux${HPUX_REV}
-       exit ;;
+       HPUX_REV=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*.[0B]*//'`
+       GUESS=ia64-hp-hpux$HPUX_REV
+       ;;
     3050*:HI-UX:*:*)
-       eval $set_cc_for_build
-       sed 's/^        //' << EOF >$dummy.c
+       set_cc_for_build
+       sed 's/^        //' << EOF > "$dummy.c"
        #include <unistd.h>
        int
        main ()
@@ -721,38 +797,38 @@ EOF
          exit (0);
        }
 EOF
-       $CC_FOR_BUILD -o $dummy $dummy.c && SYSTEM_NAME=`$dummy` &&
+       $CC_FOR_BUILD -o "$dummy" "$dummy.c" && SYSTEM_NAME=`"$dummy"` &&
                { echo "$SYSTEM_NAME"; exit; }
-       echo unknown-hitachi-hiuxwe2
-       exit ;;
-    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:* )
-       echo hppa1.1-hp-bsd
-       exit ;;
+       GUESS=unknown-hitachi-hiuxwe2
+       ;;
+    9000/7??:4.3bsd:*:* | 9000/8?[79]:4.3bsd:*:*)
+       GUESS=hppa1.1-hp-bsd
+       ;;
     9000/8??:4.3bsd:*:*)
-       echo hppa1.0-hp-bsd
-       exit ;;
+       GUESS=hppa1.0-hp-bsd
+       ;;
     *9??*:MPE/iX:*:* | *3000*:MPE/iX:*:*)
-       echo hppa1.0-hp-mpeix
-       exit ;;
-    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:* )
-       echo hppa1.1-hp-osf
-       exit ;;
+       GUESS=hppa1.0-hp-mpeix
+       ;;
+    hp7??:OSF1:*:* | hp8?[79]:OSF1:*:*)
+       GUESS=hppa1.1-hp-osf
+       ;;
     hp8??:OSF1:*:*)
-       echo hppa1.0-hp-osf
-       exit ;;
+       GUESS=hppa1.0-hp-osf
+       ;;
     i*86:OSF1:*:*)
-       if [ -x /usr/sbin/sysversion ] ; then
-           echo ${UNAME_MACHINE}-unknown-osf1mk
+       if test -x /usr/sbin/sysversion ; then
+           GUESS=$UNAME_MACHINE-unknown-osf1mk
        else
-           echo ${UNAME_MACHINE}-unknown-osf1
+           GUESS=$UNAME_MACHINE-unknown-osf1
        fi
-       exit ;;
+       ;;
     parisc*:Lites*:*:*)
-       echo hppa1.1-hp-lites
-       exit ;;
+       GUESS=hppa1.1-hp-lites
+       ;;
     C1*:ConvexOS:*:* | convex:ConvexOS:C1*:*)
-       echo c1-convex-bsd
-       exit ;;
+       GUESS=c1-convex-bsd
+       ;;
     C2*:ConvexOS:*:* | convex:ConvexOS:C2*:*)
        if getsysinfo -f scalar_acc
        then echo c32-convex-bsd
@@ -760,139 +836,154 @@ EOF
        fi
        exit ;;
     C34*:ConvexOS:*:* | convex:ConvexOS:C34*:*)
-       echo c34-convex-bsd
-       exit ;;
+       GUESS=c34-convex-bsd
+       ;;
     C38*:ConvexOS:*:* | convex:ConvexOS:C38*:*)
-       echo c38-convex-bsd
-       exit ;;
+       GUESS=c38-convex-bsd
+       ;;
     C4*:ConvexOS:*:* | convex:ConvexOS:C4*:*)
-       echo c4-convex-bsd
-       exit ;;
+       GUESS=c4-convex-bsd
+       ;;
     CRAY*Y-MP:*:*:*)
-       echo ymp-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-       exit ;;
+       CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+       GUESS=ymp-cray-unicos$CRAY_REL
+       ;;
     CRAY*[A-Z]90:*:*:*)
-       echo ${UNAME_MACHINE}-cray-unicos${UNAME_RELEASE} \
+       echo "$UNAME_MACHINE"-cray-unicos"$UNAME_RELEASE" \
        | sed -e 's/CRAY.*\([A-Z]90\)/\1/' \
              -e y/ABCDEFGHIJKLMNOPQRSTUVWXYZ/abcdefghijklmnopqrstuvwxyz/ \
              -e 's/\.[^.]*$/.X/'
        exit ;;
     CRAY*TS:*:*:*)
-       echo t90-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-       exit ;;
+       CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+       GUESS=t90-cray-unicos$CRAY_REL
+       ;;
     CRAY*T3E:*:*:*)
-       echo alphaev5-cray-unicosmk${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-       exit ;;
+       CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+       GUESS=alphaev5-cray-unicosmk$CRAY_REL
+       ;;
     CRAY*SV1:*:*:*)
-       echo sv1-cray-unicos${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-       exit ;;
+       CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+       GUESS=sv1-cray-unicos$CRAY_REL
+       ;;
     *:UNICOS/mp:*:*)
-       echo craynv-cray-unicosmp${UNAME_RELEASE} | sed -e 's/\.[^.]*$/.X/'
-       exit ;;
+       CRAY_REL=`echo "$UNAME_RELEASE" | sed -e 's/\.[^.]*$/.X/'`
+       GUESS=craynv-cray-unicosmp$CRAY_REL
+       ;;
     F30[01]:UNIX_System_V:*:* | F700:UNIX_System_V:*:*)
-       FUJITSU_PROC=`uname -m | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz'`
-       FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
-       FUJITSU_REL=`echo ${UNAME_RELEASE} | sed -e 's/ /_/'`
-       echo "${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
-       exit ;;
+       FUJITSU_PROC=`uname -m | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz`
+       FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
+       FUJITSU_REL=`echo "$UNAME_RELEASE" | sed -e 's/ /_/'`
+       GUESS=${FUJITSU_PROC}-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}
+       ;;
     5000:UNIX_System_V:4.*:*)
-       FUJITSU_SYS=`uname -p | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/\///'`
-       FUJITSU_REL=`echo ${UNAME_RELEASE} | tr 'ABCDEFGHIJKLMNOPQRSTUVWXYZ' 'abcdefghijklmnopqrstuvwxyz' | sed -e 's/ /_/'`
-       echo "sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}"
-       exit ;;
+       FUJITSU_SYS=`uname -p | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/\///'`
+       FUJITSU_REL=`echo "$UNAME_RELEASE" | tr ABCDEFGHIJKLMNOPQRSTUVWXYZ abcdefghijklmnopqrstuvwxyz | sed -e 's/ /_/'`
+       GUESS=sparc-fujitsu-${FUJITSU_SYS}${FUJITSU_REL}
+       ;;
     i*86:BSD/386:*:* | i*86:BSD/OS:*:* | *:Ascend\ Embedded/OS:*:*)
-       echo ${UNAME_MACHINE}-pc-bsdi${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-bsdi$UNAME_RELEASE
+       ;;
     sparc*:BSD/OS:*:*)
-       echo sparc-unknown-bsdi${UNAME_RELEASE}
-       exit ;;
+       GUESS=sparc-unknown-bsdi$UNAME_RELEASE
+       ;;
     *:BSD/OS:*:*)
-       echo ${UNAME_MACHINE}-unknown-bsdi${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-bsdi$UNAME_RELEASE
+       ;;
+    arm:FreeBSD:*:*)
+       UNAME_PROCESSOR=`uname -p`
+       set_cc_for_build
+       if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
+           | grep -q __ARM_PCS_VFP
+       then
+           FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+           GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabi
+       else
+           FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+           GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL-gnueabihf
+       fi
+       ;;
     *:FreeBSD:*:*)
        UNAME_PROCESSOR=`/usr/bin/uname -p`
-       case ${UNAME_PROCESSOR} in
+       case $UNAME_PROCESSOR in
            amd64)
-               echo x86_64-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
-           *)
-               echo ${UNAME_PROCESSOR}-unknown-freebsd`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'` ;;
+               UNAME_PROCESSOR=x86_64 ;;
+           i386)
+               UNAME_PROCESSOR=i586 ;;
        esac
-       exit ;;
+       FREEBSD_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+       GUESS=$UNAME_PROCESSOR-unknown-freebsd$FREEBSD_REL
+       ;;
     i*:CYGWIN*:*)
-       echo ${UNAME_MACHINE}-pc-cygwin
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-cygwin
+       ;;
     *:MINGW64*:*)
-       echo ${UNAME_MACHINE}-pc-mingw64
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-mingw64
+       ;;
     *:MINGW*:*)
-       echo ${UNAME_MACHINE}-pc-mingw32
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-mingw32
+       ;;
     *:MSYS*:*)
-       echo ${UNAME_MACHINE}-pc-msys
-       exit ;;
-    i*:windows32*:*)
-       # uname -m includes "-pc" on this system.
-       echo ${UNAME_MACHINE}-mingw32
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-msys
+       ;;
     i*:PW*:*)
-       echo ${UNAME_MACHINE}-pc-pw32
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-pw32
+       ;;
+    *:SerenityOS:*:*)
+        GUESS=$UNAME_MACHINE-pc-serenity
+        ;;
     *:Interix*:*)
-       case ${UNAME_MACHINE} in
+       case $UNAME_MACHINE in
            x86)
-               echo i586-pc-interix${UNAME_RELEASE}
-               exit ;;
+               GUESS=i586-pc-interix$UNAME_RELEASE
+               ;;
            authenticamd | genuineintel | EM64T)
-               echo x86_64-unknown-interix${UNAME_RELEASE}
-               exit ;;
+               GUESS=x86_64-unknown-interix$UNAME_RELEASE
+               ;;
            IA64)
-               echo ia64-unknown-interix${UNAME_RELEASE}
-               exit ;;
+               GUESS=ia64-unknown-interix$UNAME_RELEASE
+               ;;
        esac ;;
-    [345]86:Windows_95:* | [345]86:Windows_98:* | [345]86:Windows_NT:*)
-       echo i${UNAME_MACHINE}-pc-mks
-       exit ;;
-    8664:Windows_NT:*)
-       echo x86_64-pc-mks
-       exit ;;
-    i*:Windows_NT*:* | Pentium*:Windows_NT*:*)
-       # How do we know it's Interix rather than the generic POSIX subsystem?
-       # It also conflicts with pre-2.0 versions of AT&T UWIN. Should we
-       # UNAME_MACHINE based on the output of uname instead of i386?
-       echo i586-pc-interix
-       exit ;;
     i*:UWIN*:*)
-       echo ${UNAME_MACHINE}-pc-uwin
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-uwin
+       ;;
     amd64:CYGWIN*:*:* | x86_64:CYGWIN*:*:*)
-       echo x86_64-unknown-cygwin
-       exit ;;
-    p*:CYGWIN*:*)
-       echo powerpcle-unknown-cygwin
-       exit ;;
+       GUESS=x86_64-pc-cygwin
+       ;;
     prep*:SunOS:5.*:*)
-       echo powerpcle-unknown-solaris2`echo ${UNAME_RELEASE}|sed -e 's/[^.]*//'`
-       exit ;;
+       SUN_REL=`echo "$UNAME_RELEASE" | sed -e 's/[^.]*//'`
+       GUESS=powerpcle-unknown-solaris2$SUN_REL
+       ;;
     *:GNU:*:*)
        # the GNU system
-       echo `echo ${UNAME_MACHINE}|sed -e 's,[-/].*$,,'`-unknown-${LIBC}`echo ${UNAME_RELEASE}|sed -e 's,/.*$,,'`
-       exit ;;
+       GNU_ARCH=`echo "$UNAME_MACHINE" | sed -e 's,[-/].*$,,'`
+       GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's,/.*$,,'`
+       GUESS=$GNU_ARCH-unknown-$LIBC$GNU_REL
+       ;;
     *:GNU/*:*:*)
        # other systems with GNU libc and userland
-       echo ${UNAME_MACHINE}-unknown-`echo ${UNAME_SYSTEM} | sed 's,^[^/]*/,,' | tr '[A-Z]' '[a-z]'``echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`-${LIBC}
-       exit ;;
-    i*86:Minix:*:*)
-       echo ${UNAME_MACHINE}-pc-minix
-       exit ;;
+       GNU_SYS=`echo "$UNAME_SYSTEM" | sed 's,^[^/]*/,,' | tr "[:upper:]" "[:lower:]"`
+       GNU_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+       GUESS=$UNAME_MACHINE-unknown-$GNU_SYS$GNU_REL-$LIBC
+       ;;
+    x86_64:[Mm]anagarm:*:*|i?86:[Mm]anagarm:*:*)
+       GUESS="$UNAME_MACHINE-pc-managarm-mlibc"
+       ;;
+    *:[Mm]anagarm:*:*)
+       GUESS="$UNAME_MACHINE-unknown-managarm-mlibc"
+       ;;
+    *:Minix:*:*)
+       GUESS=$UNAME_MACHINE-unknown-minix
+       ;;
     aarch64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     aarch64_be:Linux:*:*)
        UNAME_MACHINE=aarch64_be
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     alpha:Linux:*:*)
-       case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' < /proc/cpuinfo` in
+       case `sed -n '/^cpu model/s/^.*: \(.*\)/\1/p' /proc/cpuinfo 2>/dev/null` in
          EV5)   UNAME_MACHINE=alphaev5 ;;
          EV56)  UNAME_MACHINE=alphaev56 ;;
          PCA56) UNAME_MACHINE=alphapca56 ;;
@@ -902,172 +993,237 @@ EOF
          EV68*) UNAME_MACHINE=alphaev68 ;;
        esac
        objdump --private-headers /bin/sh | grep -q ld.so.1
-       if test "$?" = 0 ; then LIBC="gnulibc1" ; fi
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
-    arc:Linux:*:* | arceb:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       if test "$?" = 0 ; then LIBC=gnulibc1 ; fi
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
+    arc:Linux:*:* | arceb:Linux:*:* | arc32:Linux:*:* | arc64:Linux:*:*)
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     arm*:Linux:*:*)
-       eval $set_cc_for_build
+       set_cc_for_build
        if echo __ARM_EABI__ | $CC_FOR_BUILD -E - 2>/dev/null \
            | grep -q __ARM_EABI__
        then
-           echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
+           GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
        else
            if echo __ARM_PCS_VFP | $CC_FOR_BUILD -E - 2>/dev/null \
                | grep -q __ARM_PCS_VFP
            then
-               echo ${UNAME_MACHINE}-unknown-linux-${LIBC}eabi
+               GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabi
            else
-               echo ${UNAME_MACHINE}-unknown-linux-${LIBC}eabihf
+               GUESS=$UNAME_MACHINE-unknown-linux-${LIBC}eabihf
            fi
        fi
-       exit ;;
+       ;;
     avr32*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     cris:Linux:*:*)
-       echo ${UNAME_MACHINE}-axis-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-axis-linux-$LIBC
+       ;;
     crisv32:Linux:*:*)
-       echo ${UNAME_MACHINE}-axis-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-axis-linux-$LIBC
+       ;;
+    e2k:Linux:*:*)
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     frv:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     hexagon:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     i*86:Linux:*:*)
-       echo ${UNAME_MACHINE}-pc-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-linux-$LIBC
+       ;;
     ia64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
+    k1om:Linux:*:*)
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
+    loongarch32:Linux:*:* | loongarch64:Linux:*:*)
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     m32r*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     m68*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     mips:Linux:*:* | mips64:Linux:*:*)
-       eval $set_cc_for_build
-       sed 's/^        //' << EOF >$dummy.c
+       set_cc_for_build
+       IS_GLIBC=0
+       test x"${LIBC}" = xgnu && IS_GLIBC=1
+       sed 's/^        //' << EOF > "$dummy.c"
        #undef CPU
-       #undef ${UNAME_MACHINE}
-       #undef ${UNAME_MACHINE}el
+       #undef mips
+       #undef mipsel
+       #undef mips64
+       #undef mips64el
+       #if ${IS_GLIBC} && defined(_ABI64)
+       LIBCABI=gnuabi64
+       #else
+       #if ${IS_GLIBC} && defined(_ABIN32)
+       LIBCABI=gnuabin32
+       #else
+       LIBCABI=${LIBC}
+       #endif
+       #endif
+
+       #if ${IS_GLIBC} && defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6
+       CPU=mipsisa64r6
+       #else
+       #if ${IS_GLIBC} && !defined(__mips64) && defined(__mips_isa_rev) && __mips_isa_rev>=6
+       CPU=mipsisa32r6
+       #else
+       #if defined(__mips64)
+       CPU=mips64
+       #else
+       CPU=mips
+       #endif
+       #endif
+       #endif
+
        #if defined(__MIPSEL__) || defined(__MIPSEL) || defined(_MIPSEL) || defined(MIPSEL)
-       CPU=${UNAME_MACHINE}el
+       MIPS_ENDIAN=el
        #else
        #if defined(__MIPSEB__) || defined(__MIPSEB) || defined(_MIPSEB) || defined(MIPSEB)
-       CPU=${UNAME_MACHINE}
+       MIPS_ENDIAN=
        #else
-       CPU=
+       MIPS_ENDIAN=
        #endif
        #endif
 EOF
-       eval `$CC_FOR_BUILD -E $dummy.c 2>/dev/null | grep '^CPU'`
-       test x"${CPU}" != x && { echo "${CPU}-unknown-linux-${LIBC}"; exit; }
+       cc_set_vars=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^CPU\|^MIPS_ENDIAN\|^LIBCABI'`
+       eval "$cc_set_vars"
+       test "x$CPU" != x && { echo "$CPU${MIPS_ENDIAN}-unknown-linux-$LIBCABI"; exit; }
+       ;;
+    mips64el:Linux:*:*)
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
        ;;
     openrisc*:Linux:*:*)
-       echo or1k-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=or1k-unknown-linux-$LIBC
+       ;;
     or32:Linux:*:* | or1k*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     padre:Linux:*:*)
-       echo sparc-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=sparc-unknown-linux-$LIBC
+       ;;
     parisc64:Linux:*:* | hppa64:Linux:*:*)
-       echo hppa64-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=hppa64-unknown-linux-$LIBC
+       ;;
     parisc:Linux:*:* | hppa:Linux:*:*)
        # Look for CPU level
        case `grep '^cpu[^a-z]*:' /proc/cpuinfo 2>/dev/null | cut -d' ' -f2` in
-         PA7*) echo hppa1.1-unknown-linux-${LIBC} ;;
-         PA8*) echo hppa2.0-unknown-linux-${LIBC} ;;
-         *)    echo hppa-unknown-linux-${LIBC} ;;
+         PA7*) GUESS=hppa1.1-unknown-linux-$LIBC ;;
+         PA8*) GUESS=hppa2.0-unknown-linux-$LIBC ;;
+         *)    GUESS=hppa-unknown-linux-$LIBC ;;
        esac
-       exit ;;
+       ;;
     ppc64:Linux:*:*)
-       echo powerpc64-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=powerpc64-unknown-linux-$LIBC
+       ;;
     ppc:Linux:*:*)
-       echo powerpc-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=powerpc-unknown-linux-$LIBC
+       ;;
     ppc64le:Linux:*:*)
-       echo powerpc64le-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=powerpc64le-unknown-linux-$LIBC
+       ;;
     ppcle:Linux:*:*)
-       echo powerpcle-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=powerpcle-unknown-linux-$LIBC
+       ;;
+    riscv32:Linux:*:* | riscv32be:Linux:*:* | riscv64:Linux:*:* | riscv64be:Linux:*:*)
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     s390:Linux:*:* | s390x:Linux:*:*)
-       echo ${UNAME_MACHINE}-ibm-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-ibm-linux-$LIBC
+       ;;
     sh64*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     sh*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     sparc:Linux:*:* | sparc64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     tile*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     vax:Linux:*:*)
-       echo ${UNAME_MACHINE}-dec-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-dec-linux-$LIBC
+       ;;
     x86_64:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       set_cc_for_build
+       CPU=$UNAME_MACHINE
+       LIBCABI=$LIBC
+       if test "$CC_FOR_BUILD" != no_compiler_found; then
+           ABI=64
+           sed 's/^        //' << EOF > "$dummy.c"
+           #ifdef __i386__
+           ABI=x86
+           #else
+           #ifdef __ILP32__
+           ABI=x32
+           #endif
+           #endif
+EOF
+           cc_set_abi=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^ABI' | sed 's, ,,g'`
+           eval "$cc_set_abi"
+           case $ABI in
+               x86) CPU=i686 ;;
+               x32) LIBCABI=${LIBC}x32 ;;
+           esac
+       fi
+       GUESS=$CPU-pc-linux-$LIBCABI
+       ;;
     xtensa*:Linux:*:*)
-       echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+       ;;
     i*86:DYNIX/ptx:4*:*)
        # ptx 4.0 does uname -s correctly, with DYNIX/ptx in there.
        # earlier versions are messed up and put the nodename in both
        # sysname and nodename.
-       echo i386-sequent-sysv4
-       exit ;;
+       GUESS=i386-sequent-sysv4
+       ;;
     i*86:UNIX_SV:4.2MP:2.*)
        # Unixware is an offshoot of SVR4, but it has its own version
        # number series starting with 2...
        # I am not positive that other SVR4 systems won't match this,
        # I just have to hope.  -- rms.
        # Use sysv4.2uw... so that sysv4* matches it.
-       echo ${UNAME_MACHINE}-pc-sysv4.2uw${UNAME_VERSION}
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-sysv4.2uw$UNAME_VERSION
+       ;;
     i*86:OS/2:*:*)
        # If we were able to find `uname', then EMX Unix compatibility
        # is probably installed.
-       echo ${UNAME_MACHINE}-pc-os2-emx
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-os2-emx
+       ;;
     i*86:XTS-300:*:STOP)
-       echo ${UNAME_MACHINE}-unknown-stop
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-stop
+       ;;
     i*86:atheos:*:*)
-       echo ${UNAME_MACHINE}-unknown-atheos
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-atheos
+       ;;
     i*86:syllable:*:*)
-       echo ${UNAME_MACHINE}-pc-syllable
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-syllable
+       ;;
     i*86:LynxOS:2.*:* | i*86:LynxOS:3.[01]*:* | i*86:LynxOS:4.[02]*:*)
-       echo i386-unknown-lynxos${UNAME_RELEASE}
-       exit ;;
+       GUESS=i386-unknown-lynxos$UNAME_RELEASE
+       ;;
     i*86:*DOS:*:*)
-       echo ${UNAME_MACHINE}-pc-msdosdjgpp
-       exit ;;
-    i*86:*:4.*:* | i*86:SYSTEM_V:4.*:*)
-       UNAME_REL=`echo ${UNAME_RELEASE} | sed 's/\/MP$//'`
+       GUESS=$UNAME_MACHINE-pc-msdosdjgpp
+       ;;
+    i*86:*:4.*:*)
+       UNAME_REL=`echo "$UNAME_RELEASE" | sed 's/\/MP$//'`
        if grep Novell /usr/include/link.h >/dev/null 2>/dev/null; then
-               echo ${UNAME_MACHINE}-univel-sysv${UNAME_REL}
+               GUESS=$UNAME_MACHINE-univel-sysv$UNAME_REL
        else
-               echo ${UNAME_MACHINE}-pc-sysv${UNAME_REL}
+               GUESS=$UNAME_MACHINE-pc-sysv$UNAME_REL
        fi
-       exit ;;
+       ;;
     i*86:*:5:[678]*)
        # UnixWare 7.x, OpenUNIX and OpenServer 6.
        case `/bin/uname -X | grep "^Machine"` in
@@ -1075,12 +1231,12 @@ EOF
            *Pentium)        UNAME_MACHINE=i586 ;;
            *Pent*|*Celeron) UNAME_MACHINE=i686 ;;
        esac
-       echo ${UNAME_MACHINE}-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-sysv${UNAME_RELEASE}${UNAME_SYSTEM}${UNAME_VERSION}
+       ;;
     i*86:*:3.2:*)
        if test -f /usr/options/cb.name; then
                UNAME_REL=`sed -n 's/.*Version //p' </usr/options/cb.name`
-               echo ${UNAME_MACHINE}-pc-isc$UNAME_REL
+               GUESS=$UNAME_MACHINE-pc-isc$UNAME_REL
        elif /bin/uname -X 2>/dev/null >/dev/null ; then
                UNAME_REL=`(/bin/uname -X|grep Release|sed -e 's/.*= //')`
                (/bin/uname -X|grep i80486 >/dev/null) && UNAME_MACHINE=i486
@@ -1090,43 +1246,43 @@ EOF
                        && UNAME_MACHINE=i686
                (/bin/uname -X|grep '^Machine.*Pentium Pro' >/dev/null) \
                        && UNAME_MACHINE=i686
-               echo ${UNAME_MACHINE}-pc-sco$UNAME_REL
+               GUESS=$UNAME_MACHINE-pc-sco$UNAME_REL
        else
-               echo ${UNAME_MACHINE}-pc-sysv32
+               GUESS=$UNAME_MACHINE-pc-sysv32
        fi
-       exit ;;
+       ;;
     pc:*:*:*)
        # Left here for compatibility:
        # uname -m prints for DJGPP always 'pc', but it prints nothing about
        # the processor, so we play safe by assuming i586.
        # Note: whatever this is, it MUST be the same as what config.sub
-       # prints for the "djgpp" host, or else GDB configuration will decide that
+       # prints for the "djgpp" host, or else GDB configure will decide that
        # this is a cross-build.
-       echo i586-pc-msdosdjgpp
-       exit ;;
+       GUESS=i586-pc-msdosdjgpp
+       ;;
     Intel:Mach:3*:*)
-       echo i386-pc-mach3
-       exit ;;
+       GUESS=i386-pc-mach3
+       ;;
     paragon:*:*:*)
-       echo i860-intel-osf1
-       exit ;;
+       GUESS=i860-intel-osf1
+       ;;
     i860:*:4.*:*) # i860-SVR4
        if grep Stardent /usr/include/sys/uadmin.h >/dev/null 2>&1 ; then
-         echo i860-stardent-sysv${UNAME_RELEASE} # Stardent Vistra i860-SVR4
+         GUESS=i860-stardent-sysv$UNAME_RELEASE    # Stardent Vistra i860-SVR4
        else # Add other i860-SVR4 vendors below as they are discovered.
-         echo i860-unknown-sysv${UNAME_RELEASE}  # Unknown i860-SVR4
+         GUESS=i860-unknown-sysv$UNAME_RELEASE     # Unknown i860-SVR4
        fi
-       exit ;;
+       ;;
     mini*:CTIX:SYS*5:*)
        # "miniframe"
-       echo m68010-convergent-sysv
-       exit ;;
+       GUESS=m68010-convergent-sysv
+       ;;
     mc68k:UNIX:SYSTEM5:3.51m)
-       echo m68k-convergent-sysv
-       exit ;;
+       GUESS=m68k-convergent-sysv
+       ;;
     M680?0:D-NIX:5.3:*)
-       echo m68k-diab-dnix
-       exit ;;
+       GUESS=m68k-diab-dnix
+       ;;
     M68*:*:R3V[5678]*:*)
        test -r /sysV68 && { echo 'm68k-motorola-sysv'; exit; } ;;
     3[345]??:*:4.0:3.0 | 3[34]??A:*:4.0:3.0 | 3[34]??,*:*:4.0:3.0 | 3[34]??/*:*:4.0:3.0 | 4400:*:4.0:3.0 | 4850:*:4.0:3.0 | SKA40:*:4.0:3.0 | SDS2:*:4.0:3.0 | SHG2:*:4.0:3.0 | S7501*:*:4.0:3.0)
@@ -1134,9 +1290,9 @@ EOF
        test -r /etc/.relid \
        && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
-         && { echo i486-ncr-sysv4.3${OS_REL}; exit; }
+         && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
        /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
-         && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;;
+         && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
     3[34]??:*:4.0:* | 3[34]??,*:*:4.0:*)
        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
          && { echo i486-ncr-sysv4; exit; } ;;
@@ -1145,248 +1301,444 @@ EOF
        test -r /etc/.relid \
            && OS_REL=.`sed -n 's/[^ ]* [^ ]* \([0-9][0-9]\).*/\1/p' < /etc/.relid`
        /bin/uname -p 2>/dev/null | grep 86 >/dev/null \
-           && { echo i486-ncr-sysv4.3${OS_REL}; exit; }
+           && { echo i486-ncr-sysv4.3"$OS_REL"; exit; }
        /bin/uname -p 2>/dev/null | /bin/grep entium >/dev/null \
-           && { echo i586-ncr-sysv4.3${OS_REL}; exit; }
+           && { echo i586-ncr-sysv4.3"$OS_REL"; exit; }
        /bin/uname -p 2>/dev/null | /bin/grep pteron >/dev/null \
-           && { echo i586-ncr-sysv4.3${OS_REL}; exit; } ;;
+           && { echo i586-ncr-sysv4.3"$OS_REL"; exit; } ;;
     m68*:LynxOS:2.*:* | m68*:LynxOS:3.0*:*)
-       echo m68k-unknown-lynxos${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-unknown-lynxos$UNAME_RELEASE
+       ;;
     mc68030:UNIX_System_V:4.*:*)
-       echo m68k-atari-sysv4
-       exit ;;
+       GUESS=m68k-atari-sysv4
+       ;;
     TSUNAMI:LynxOS:2.*:*)
-       echo sparc-unknown-lynxos${UNAME_RELEASE}
-       exit ;;
+       GUESS=sparc-unknown-lynxos$UNAME_RELEASE
+       ;;
     rs6000:LynxOS:2.*:*)
-       echo rs6000-unknown-lynxos${UNAME_RELEASE}
-       exit ;;
+       GUESS=rs6000-unknown-lynxos$UNAME_RELEASE
+       ;;
     PowerPC:LynxOS:2.*:* | PowerPC:LynxOS:3.[01]*:* | PowerPC:LynxOS:4.[02]*:*)
-       echo powerpc-unknown-lynxos${UNAME_RELEASE}
-       exit ;;
+       GUESS=powerpc-unknown-lynxos$UNAME_RELEASE
+       ;;
     SM[BE]S:UNIX_SV:*:*)
-       echo mips-dde-sysv${UNAME_RELEASE}
-       exit ;;
+       GUESS=mips-dde-sysv$UNAME_RELEASE
+       ;;
     RM*:ReliantUNIX-*:*:*)
-       echo mips-sni-sysv4
-       exit ;;
+       GUESS=mips-sni-sysv4
+       ;;
     RM*:SINIX-*:*:*)
-       echo mips-sni-sysv4
-       exit ;;
+       GUESS=mips-sni-sysv4
+       ;;
     *:SINIX-*:*:*)
        if uname -p 2>/dev/null >/dev/null ; then
                UNAME_MACHINE=`(uname -p) 2>/dev/null`
-               echo ${UNAME_MACHINE}-sni-sysv4
+               GUESS=$UNAME_MACHINE-sni-sysv4
        else
-               echo ns32k-sni-sysv
+               GUESS=ns32k-sni-sysv
        fi
-       exit ;;
+       ;;
     PENTIUM:*:4.0*:*)  # Unisys `ClearPath HMP IX 4000' SVR4/MP effort
                        # says <Richard.M.Bartel@ccMail.Census.GOV>
-       echo i586-unisys-sysv4
-       exit ;;
+       GUESS=i586-unisys-sysv4
+       ;;
     *:UNIX_System_V:4*:FTX*)
        # From Gerald Hewes <hewes@openmarket.com>.
        # How about differentiating between stratus architectures? -djm
-       echo hppa1.1-stratus-sysv4
-       exit ;;
+       GUESS=hppa1.1-stratus-sysv4
+       ;;
     *:*:*:FTX*)
        # From seanf@swdc.stratus.com.
-       echo i860-stratus-sysv4
-       exit ;;
+       GUESS=i860-stratus-sysv4
+       ;;
     i*86:VOS:*:*)
        # From Paul.Green@stratus.com.
-       echo ${UNAME_MACHINE}-stratus-vos
-       exit ;;
+       GUESS=$UNAME_MACHINE-stratus-vos
+       ;;
     *:VOS:*:*)
        # From Paul.Green@stratus.com.
-       echo hppa1.1-stratus-vos
-       exit ;;
+       GUESS=hppa1.1-stratus-vos
+       ;;
     mc68*:A/UX:*:*)
-       echo m68k-apple-aux${UNAME_RELEASE}
-       exit ;;
+       GUESS=m68k-apple-aux$UNAME_RELEASE
+       ;;
     news*:NEWS-OS:6*:*)
-       echo mips-sony-newsos6
-       exit ;;
+       GUESS=mips-sony-newsos6
+       ;;
     R[34]000:*System_V*:*:* | R4000:UNIX_SYSV:*:* | R*000:UNIX_SV:*:*)
-       if [ -d /usr/nec ]; then
-               echo mips-nec-sysv${UNAME_RELEASE}
+       if test -d /usr/nec; then
+               GUESS=mips-nec-sysv$UNAME_RELEASE
        else
-               echo mips-unknown-sysv${UNAME_RELEASE}
+               GUESS=mips-unknown-sysv$UNAME_RELEASE
        fi
-       exit ;;
+       ;;
     BeBox:BeOS:*:*)    # BeOS running on hardware made by Be, PPC only.
-       echo powerpc-be-beos
-       exit ;;
+       GUESS=powerpc-be-beos
+       ;;
     BeMac:BeOS:*:*)    # BeOS running on Mac or Mac clone, PPC only.
-       echo powerpc-apple-beos
-       exit ;;
+       GUESS=powerpc-apple-beos
+       ;;
     BePC:BeOS:*:*)     # BeOS running on Intel PC compatible.
-       echo i586-pc-beos
-       exit ;;
+       GUESS=i586-pc-beos
+       ;;
     BePC:Haiku:*:*)    # Haiku running on Intel PC compatible.
-       echo i586-pc-haiku
-       exit ;;
-    x86_64:Haiku:*:*)
-       echo x86_64-unknown-haiku
-       exit ;;
+       GUESS=i586-pc-haiku
+       ;;
+    ppc:Haiku:*:*)     # Haiku running on Apple PowerPC
+       GUESS=powerpc-apple-haiku
+       ;;
+    *:Haiku:*:*)       # Haiku modern gcc (not bound by BeOS compat)
+       GUESS=$UNAME_MACHINE-unknown-haiku
+       ;;
     SX-4:SUPER-UX:*:*)
-       echo sx4-nec-superux${UNAME_RELEASE}
-       exit ;;
+       GUESS=sx4-nec-superux$UNAME_RELEASE
+       ;;
     SX-5:SUPER-UX:*:*)
-       echo sx5-nec-superux${UNAME_RELEASE}
-       exit ;;
+       GUESS=sx5-nec-superux$UNAME_RELEASE
+       ;;
     SX-6:SUPER-UX:*:*)
-       echo sx6-nec-superux${UNAME_RELEASE}
-       exit ;;
+       GUESS=sx6-nec-superux$UNAME_RELEASE
+       ;;
     SX-7:SUPER-UX:*:*)
-       echo sx7-nec-superux${UNAME_RELEASE}
-       exit ;;
+       GUESS=sx7-nec-superux$UNAME_RELEASE
+       ;;
     SX-8:SUPER-UX:*:*)
-       echo sx8-nec-superux${UNAME_RELEASE}
-       exit ;;
+       GUESS=sx8-nec-superux$UNAME_RELEASE
+       ;;
     SX-8R:SUPER-UX:*:*)
-       echo sx8r-nec-superux${UNAME_RELEASE}
-       exit ;;
+       GUESS=sx8r-nec-superux$UNAME_RELEASE
+       ;;
+    SX-ACE:SUPER-UX:*:*)
+       GUESS=sxace-nec-superux$UNAME_RELEASE
+       ;;
     Power*:Rhapsody:*:*)
-       echo powerpc-apple-rhapsody${UNAME_RELEASE}
-       exit ;;
+       GUESS=powerpc-apple-rhapsody$UNAME_RELEASE
+       ;;
     *:Rhapsody:*:*)
-       echo ${UNAME_MACHINE}-apple-rhapsody${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-apple-rhapsody$UNAME_RELEASE
+       ;;
+    arm64:Darwin:*:*)
+       GUESS=aarch64-apple-darwin$UNAME_RELEASE
+       ;;
     *:Darwin:*:*)
-       UNAME_PROCESSOR=`uname -p` || UNAME_PROCESSOR=unknown
-       eval $set_cc_for_build
-       if test "$UNAME_PROCESSOR" = unknown ; then
-           UNAME_PROCESSOR=powerpc
+       UNAME_PROCESSOR=`uname -p`
+       case $UNAME_PROCESSOR in
+           unknown) UNAME_PROCESSOR=powerpc ;;
+       esac
+       if command -v xcode-select > /dev/null 2> /dev/null && \
+               ! xcode-select --print-path > /dev/null 2> /dev/null ; then
+           # Avoid executing cc if there is no toolchain installed as
+           # cc will be a stub that puts up a graphical alert
+           # prompting the user to install developer tools.
+           CC_FOR_BUILD=no_compiler_found
+       else
+           set_cc_for_build
        fi
-       if test `echo "$UNAME_RELEASE" | sed -e 's/\..*//'` -le 10 ; then
-           if [ "$CC_FOR_BUILD" != 'no_compiler_found' ]; then
-               if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
-                   (CCOPTS= $CC_FOR_BUILD -E - 2>/dev/null) | \
-                   grep IS_64BIT_ARCH >/dev/null
-               then
-                   case $UNAME_PROCESSOR in
-                       i386) UNAME_PROCESSOR=x86_64 ;;
-                       powerpc) UNAME_PROCESSOR=powerpc64 ;;
-                   esac
-               fi
+       if test "$CC_FOR_BUILD" != no_compiler_found; then
+           if (echo '#ifdef __LP64__'; echo IS_64BIT_ARCH; echo '#endif') | \
+                  (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+                  grep IS_64BIT_ARCH >/dev/null
+           then
+               case $UNAME_PROCESSOR in
+                   i386) UNAME_PROCESSOR=x86_64 ;;
+                   powerpc) UNAME_PROCESSOR=powerpc64 ;;
+               esac
+           fi
+           # On 10.4-10.6 one might compile for PowerPC via gcc -arch ppc
+           if (echo '#ifdef __POWERPC__'; echo IS_PPC; echo '#endif') | \
+                  (CCOPTS="" $CC_FOR_BUILD -E - 2>/dev/null) | \
+                  grep IS_PPC >/dev/null
+           then
+               UNAME_PROCESSOR=powerpc
            fi
        elif test "$UNAME_PROCESSOR" = i386 ; then
-           # Avoid executing cc on OS X 10.9, as it ships with a stub
-           # that puts up a graphical alert prompting to install
-           # developer tools.  Any system running Mac OS X 10.7 or
-           # later (Darwin 11 and later) is required to have a 64-bit
-           # processor. This is not true of the ARM version of Darwin
-           # that Apple uses in portable devices.
-           UNAME_PROCESSOR=x86_64
+           # uname -m returns i386 or x86_64
+           UNAME_PROCESSOR=$UNAME_MACHINE
        fi
-       echo ${UNAME_PROCESSOR}-apple-darwin${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_PROCESSOR-apple-darwin$UNAME_RELEASE
+       ;;
     *:procnto*:*:* | *:QNX:[0123456789]*:*)
        UNAME_PROCESSOR=`uname -p`
-       if test "$UNAME_PROCESSOR" = "x86"; then
+       if test "$UNAME_PROCESSOR" = x86; then
                UNAME_PROCESSOR=i386
                UNAME_MACHINE=pc
        fi
-       echo ${UNAME_PROCESSOR}-${UNAME_MACHINE}-nto-qnx${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_PROCESSOR-$UNAME_MACHINE-nto-qnx$UNAME_RELEASE
+       ;;
     *:QNX:*:4*)
-       echo i386-pc-qnx
-       exit ;;
-    NEO-?:NONSTOP_KERNEL:*:*)
-       echo neo-tandem-nsk${UNAME_RELEASE}
-       exit ;;
+       GUESS=i386-pc-qnx
+       ;;
+    NEO-*:NONSTOP_KERNEL:*:*)
+       GUESS=neo-tandem-nsk$UNAME_RELEASE
+       ;;
     NSE-*:NONSTOP_KERNEL:*:*)
-       echo nse-tandem-nsk${UNAME_RELEASE}
-       exit ;;
-    NSR-?:NONSTOP_KERNEL:*:*)
-       echo nsr-tandem-nsk${UNAME_RELEASE}
-       exit ;;
+       GUESS=nse-tandem-nsk$UNAME_RELEASE
+       ;;
+    NSR-*:NONSTOP_KERNEL:*:*)
+       GUESS=nsr-tandem-nsk$UNAME_RELEASE
+       ;;
+    NSV-*:NONSTOP_KERNEL:*:*)
+       GUESS=nsv-tandem-nsk$UNAME_RELEASE
+       ;;
+    NSX-*:NONSTOP_KERNEL:*:*)
+       GUESS=nsx-tandem-nsk$UNAME_RELEASE
+       ;;
     *:NonStop-UX:*:*)
-       echo mips-compaq-nonstopux
-       exit ;;
+       GUESS=mips-compaq-nonstopux
+       ;;
     BS2000:POSIX*:*:*)
-       echo bs2000-siemens-sysv
-       exit ;;
+       GUESS=bs2000-siemens-sysv
+       ;;
     DS/*:UNIX_System_V:*:*)
-       echo ${UNAME_MACHINE}-${UNAME_SYSTEM}-${UNAME_RELEASE}
-       exit ;;
+       GUESS=$UNAME_MACHINE-$UNAME_SYSTEM-$UNAME_RELEASE
+       ;;
     *:Plan9:*:*)
        # "uname -m" is not consistent, so use $cputype instead. 386
        # is converted to i386 for consistency with other x86
        # operating systems.
-       if test "$cputype" = "386"; then
+       if test "${cputype-}" = 386; then
            UNAME_MACHINE=i386
-       else
-           UNAME_MACHINE="$cputype"
+       elif test "x${cputype-}" != x; then
+           UNAME_MACHINE=$cputype
        fi
-       echo ${UNAME_MACHINE}-unknown-plan9
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-plan9
+       ;;
     *:TOPS-10:*:*)
-       echo pdp10-unknown-tops10
-       exit ;;
+       GUESS=pdp10-unknown-tops10
+       ;;
     *:TENEX:*:*)
-       echo pdp10-unknown-tenex
-       exit ;;
+       GUESS=pdp10-unknown-tenex
+       ;;
     KS10:TOPS-20:*:* | KL10:TOPS-20:*:* | TYPE4:TOPS-20:*:*)
-       echo pdp10-dec-tops20
-       exit ;;
+       GUESS=pdp10-dec-tops20
+       ;;
     XKL-1:TOPS-20:*:* | TYPE5:TOPS-20:*:*)
-       echo pdp10-xkl-tops20
-       exit ;;
+       GUESS=pdp10-xkl-tops20
+       ;;
     *:TOPS-20:*:*)
-       echo pdp10-unknown-tops20
-       exit ;;
+       GUESS=pdp10-unknown-tops20
+       ;;
     *:ITS:*:*)
-       echo pdp10-unknown-its
-       exit ;;
+       GUESS=pdp10-unknown-its
+       ;;
     SEI:*:*:SEIUX)
-       echo mips-sei-seiux${UNAME_RELEASE}
-       exit ;;
+       GUESS=mips-sei-seiux$UNAME_RELEASE
+       ;;
     *:DragonFly:*:*)
-       echo ${UNAME_MACHINE}-unknown-dragonfly`echo ${UNAME_RELEASE}|sed -e 's/[-(].*//'`
-       exit ;;
+       DRAGONFLY_REL=`echo "$UNAME_RELEASE" | sed -e 's/[-(].*//'`
+       GUESS=$UNAME_MACHINE-unknown-dragonfly$DRAGONFLY_REL
+       ;;
     *:*VMS:*:*)
        UNAME_MACHINE=`(uname -p) 2>/dev/null`
-       case "${UNAME_MACHINE}" in
-           A*) echo alpha-dec-vms ; exit ;;
-           I*) echo ia64-dec-vms ; exit ;;
-           V*) echo vax-dec-vms ; exit ;;
+       case $UNAME_MACHINE in
+           A*) GUESS=alpha-dec-vms ;;
+           I*) GUESS=ia64-dec-vms ;;
+           V*) GUESS=vax-dec-vms ;;
        esac ;;
     *:XENIX:*:SysV)
-       echo i386-pc-xenix
-       exit ;;
+       GUESS=i386-pc-xenix
+       ;;
     i*86:skyos:*:*)
-       echo ${UNAME_MACHINE}-pc-skyos`echo ${UNAME_RELEASE}` | sed -e 's/ .*$//'
-       exit ;;
+       SKYOS_REL=`echo "$UNAME_RELEASE" | sed -e 's/ .*$//'`
+       GUESS=$UNAME_MACHINE-pc-skyos$SKYOS_REL
+       ;;
     i*86:rdos:*:*)
-       echo ${UNAME_MACHINE}-pc-rdos
-       exit ;;
-    i*86:AROS:*:*)
-       echo ${UNAME_MACHINE}-pc-aros
-       exit ;;
+       GUESS=$UNAME_MACHINE-pc-rdos
+       ;;
+    i*86:Fiwix:*:*)
+       GUESS=$UNAME_MACHINE-pc-fiwix
+       ;;
+    *:AROS:*:*)
+       GUESS=$UNAME_MACHINE-unknown-aros
+       ;;
     x86_64:VMkernel:*:*)
-       echo ${UNAME_MACHINE}-unknown-esx
-       exit ;;
+       GUESS=$UNAME_MACHINE-unknown-esx
+       ;;
+    amd64:Isilon\ OneFS:*:*)
+       GUESS=x86_64-unknown-onefs
+       ;;
+    *:Unleashed:*:*)
+       GUESS=$UNAME_MACHINE-unknown-unleashed$UNAME_RELEASE
+       ;;
+esac
+
+# Do we have a guess based on uname results?
+if test "x$GUESS" != x; then
+    echo "$GUESS"
+    exit
+fi
+
+# No uname command or uname output not recognized.
+set_cc_for_build
+cat > "$dummy.c" <<EOF
+#ifdef _SEQUENT_
+#include <sys/types.h>
+#include <sys/utsname.h>
+#endif
+#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__)
+#if defined (vax) || defined (__vax) || defined (__vax__) || defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__)
+#include <signal.h>
+#if defined(_SIZE_T_) || defined(SIGLOST)
+#include <sys/utsname.h>
+#endif
+#endif
+#endif
+main ()
+{
+#if defined (sony)
+#if defined (MIPSEB)
+  /* BFD wants "bsd" instead of "newsos".  Perhaps BFD should be changed,
+     I don't know....  */
+  printf ("mips-sony-bsd\n"); exit (0);
+#else
+#include <sys/param.h>
+  printf ("m68k-sony-newsos%s\n",
+#ifdef NEWSOS4
+  "4"
+#else
+  ""
+#endif
+  ); exit (0);
+#endif
+#endif
+
+#if defined (NeXT)
+#if !defined (__ARCHITECTURE__)
+#define __ARCHITECTURE__ "m68k"
+#endif
+  int version;
+  version=`(hostinfo | sed -n 's/.*NeXT Mach \([0-9]*\).*/\1/p') 2>/dev/null`;
+  if (version < 4)
+    printf ("%s-next-nextstep%d\n", __ARCHITECTURE__, version);
+  else
+    printf ("%s-next-openstep%d\n", __ARCHITECTURE__, version);
+  exit (0);
+#endif
+
+#if defined (MULTIMAX) || defined (n16)
+#if defined (UMAXV)
+  printf ("ns32k-encore-sysv\n"); exit (0);
+#else
+#if defined (CMU)
+  printf ("ns32k-encore-mach\n"); exit (0);
+#else
+  printf ("ns32k-encore-bsd\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (__386BSD__)
+  printf ("i386-pc-bsd\n"); exit (0);
+#endif
+
+#if defined (sequent)
+#if defined (i386)
+  printf ("i386-sequent-dynix\n"); exit (0);
+#endif
+#if defined (ns32000)
+  printf ("ns32k-sequent-dynix\n"); exit (0);
+#endif
+#endif
+
+#if defined (_SEQUENT_)
+  struct utsname un;
+
+  uname(&un);
+  if (strncmp(un.version, "V2", 2) == 0) {
+    printf ("i386-sequent-ptx2\n"); exit (0);
+  }
+  if (strncmp(un.version, "V1", 2) == 0) { /* XXX is V1 correct? */
+    printf ("i386-sequent-ptx1\n"); exit (0);
+  }
+  printf ("i386-sequent-ptx\n"); exit (0);
+#endif
+
+#if defined (vax)
+#if !defined (ultrix)
+#include <sys/param.h>
+#if defined (BSD)
+#if BSD == 43
+  printf ("vax-dec-bsd4.3\n"); exit (0);
+#else
+#if BSD == 199006
+  printf ("vax-dec-bsd4.3reno\n"); exit (0);
+#else
+  printf ("vax-dec-bsd\n"); exit (0);
+#endif
+#endif
+#else
+  printf ("vax-dec-bsd\n"); exit (0);
+#endif
+#else
+#if defined(_SIZE_T_) || defined(SIGLOST)
+  struct utsname un;
+  uname (&un);
+  printf ("vax-dec-ultrix%s\n", un.release); exit (0);
+#else
+  printf ("vax-dec-ultrix\n"); exit (0);
+#endif
+#endif
+#endif
+#if defined(ultrix) || defined(_ultrix) || defined(__ultrix) || defined(__ultrix__)
+#if defined(mips) || defined(__mips) || defined(__mips__) || defined(MIPS) || defined(__MIPS__)
+#if defined(_SIZE_T_) || defined(SIGLOST)
+  struct utsname *un;
+  uname (&un);
+  printf ("mips-dec-ultrix%s\n", un.release); exit (0);
+#else
+  printf ("mips-dec-ultrix\n"); exit (0);
+#endif
+#endif
+#endif
+
+#if defined (alliant) && defined (i860)
+  printf ("i860-alliant-bsd\n"); exit (0);
+#endif
+
+  exit (1);
+}
+EOF
+
+$CC_FOR_BUILD -o "$dummy" "$dummy.c" 2>/dev/null && SYSTEM_NAME=`"$dummy"` &&
+       { echo "$SYSTEM_NAME"; exit; }
+
+# Apollos put the system type in the environment.
+test -d /usr/apollo && { echo "$ISP-apollo-$SYSTYPE"; exit; }
+
+echo "$0: unable to guess system type" >&2
+
+case $UNAME_MACHINE:$UNAME_SYSTEM in
+    mips:Linux | mips64:Linux)
+       # If we got here on MIPS GNU/Linux, output extra information.
+       cat >&2 <<EOF
+
+NOTE: MIPS GNU/Linux systems require a C compiler to fully recognize
+the system type. Please install a C compiler and try again.
+EOF
+       ;;
 esac
 
 cat >&2 <<EOF
-$0: unable to guess system type
 
-This script, last modified $timestamp, has failed to recognize
-the operating system you are using. It is advised that you
-download the most up to date version of the config scripts from
+This script (version $timestamp), has failed to recognize the
+operating system you are using. If your script is old, overwrite *all*
+copies of config.guess and config.sub with the latest versions from:
 
-  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.guess;hb=HEAD
+  https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
 and
-  http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
+  https://git.savannah.gnu.org/cgit/config.git/plain/config.sub
+EOF
 
-If the version you run ($0) is already up to date, please
-send the following data and any information you think might be
-pertinent to <config-patches@gnu.org> in order to provide the needed
-information to handle your system.
+our_year=`echo $timestamp | sed 's,-.*,,'`
+thisyear=`date +%Y`
+# shellcheck disable=SC2003
+script_age=`expr "$thisyear" - "$our_year"`
+if test "$script_age" -lt 3 ; then
+   cat >&2 <<EOF
+
+If $0 has already been updated, send the following data and any
+information you think might be pertinent to config-patches@gnu.org to
+provide the necessary information to handle your system.
 
 config.guess timestamp = $timestamp
 
@@ -1405,16 +1757,17 @@ hostinfo               = `(hostinfo) 2>/dev/null`
 /usr/bin/oslevel       = `(/usr/bin/oslevel) 2>/dev/null`
 /usr/convex/getsysinfo = `(/usr/convex/getsysinfo) 2>/dev/null`
 
-UNAME_MACHINE = ${UNAME_MACHINE}
-UNAME_RELEASE = ${UNAME_RELEASE}
-UNAME_SYSTEM  = ${UNAME_SYSTEM}
-UNAME_VERSION = ${UNAME_VERSION}
+UNAME_MACHINE = "$UNAME_MACHINE"
+UNAME_RELEASE = "$UNAME_RELEASE"
+UNAME_SYSTEM  = "$UNAME_SYSTEM"
+UNAME_VERSION = "$UNAME_VERSION"
 EOF
+fi
 
 exit 1
 
 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "timestamp='"
 # time-stamp-format: "%:y-%02m-%02d"
 # time-stamp-end: "'"
index 7ffe373..de4259e 100755 (executable)
@@ -1,12 +1,14 @@
 #! /bin/sh
 # Configuration validation subroutine script.
-#   Copyright 1992-2014 Free Software Foundation, Inc.
+#   Copyright 1992-2023 Free Software Foundation, Inc.
 
-timestamp='2014-12-03'
+# shellcheck disable=SC2006,SC2268 # see below for rationale
+
+timestamp='2023-01-21'
 
 # 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
+# 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
@@ -15,7 +17,7 @@ timestamp='2014-12-03'
 # 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 <http://www.gnu.org/licenses/>.
+# 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
@@ -33,7 +35,7 @@ timestamp='2014-12-03'
 # Otherwise, we print the canonical config type on stdout and succeed.
 
 # You can get the latest version of this script from:
-# http://git.savannah.gnu.org/gitweb/?p=config.git;a=blob_plain;f=config.sub;hb=HEAD
+# 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
@@ -50,15 +52,21 @@ timestamp='2014-12-03'
 #      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
-       $0 [OPTION] ALIAS
+Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS
 
 Canonicalize a configuration name.
 
-Operation modes:
+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
@@ -68,7 +76,7 @@ Report bugs and patches to <config-patches@gnu.org>."
 version="\
 GNU config.sub ($timestamp)
 
-Copyright 1992-2014 Free Software Foundation, Inc.
+Copyright 1992-2023 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."
@@ -90,12 +98,12 @@ while test $# -gt 0 ; do
     - )        # Use stdin as input.
        break ;;
     -* )
-       echo "$me: invalid option $1$help"
+       echo "$me: invalid option $1$help" >&2
        exit 1 ;;
 
     *local*)
        # First pass through any local machine types.
-       echo $1
+       echo "$1"
        exit ;;
 
     * )
@@ -111,1228 +119,1186 @@ case $# in
     exit 1;;
 esac
 
-# Separate what the user gave into CPU-COMPANY and OS or KERNEL-OS (if any).
-# Here we must recognize all the valid KERNEL-OS combinations.
-maybe_os=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\2/'`
-case $maybe_os in
-  nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \
-  linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \
-  knetbsd*-gnu* | netbsd*-gnu* | \
-  kopensolaris*-gnu* | \
-  storm-chaos* | os2-emx* | rtmk-nova*)
-    os=-$maybe_os
-    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`
-    ;;
-  android-linux)
-    os=-linux-android
-    basic_machine=`echo $1 | sed 's/^\(.*\)-\([^-]*-[^-]*\)$/\1/'`-unknown
-    ;;
-  *)
-    basic_machine=`echo $1 | sed 's/-[^-]*$//'`
-    if [ $basic_machine != $1 ]
-    then os=`echo $1 | sed 's/.*-/-/'`
-    else os=; fi
-    ;;
-esac
+# Split fields of configuration type
+# shellcheck disable=SC2162
+saved_IFS=$IFS
+IFS="-" read field1 field2 field3 field4 <<EOF
+$1
+EOF
+IFS=$saved_IFS
 
-### Let's recognize common machines as not being operating systems so
-### that things like config.sub decstation-3100 work.  We also
-### recognize some manufacturers as not being operating systems, so we
-### can provide default operating systems below.
-case $os in
-       -sun*os*)
-               # Prevent following clause from handling this invalid input.
-               ;;
-       -dec* | -mips* | -sequent* | -encore* | -pc532* | -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*)
-               os=
-               basic_machine=$1
-               ;;
-       -bluegene*)
-               os=-cnk
-               ;;
-       -sim | -cisco | -oki | -wec | -winbond)
-               os=
-               basic_machine=$1
-               ;;
-       -scout)
-               ;;
-       -wrs)
-               os=-vxworks
-               basic_machine=$1
-               ;;
-       -chorusos*)
-               os=-chorusos
-               basic_machine=$1
-               ;;
-       -chorusrdb)
-               os=-chorusrdb
-               basic_machine=$1
-               ;;
-       -hiux*)
-               os=-hiuxwe2
-               ;;
-       -sco6)
-               os=-sco5v6
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -sco5)
-               os=-sco3.2v5
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -sco4)
-               os=-sco3.2v4
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -sco3.2.[4-9]*)
-               os=`echo $os | sed -e 's/sco3.2./sco3.2v/'`
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -sco3.2v[4-9]*)
-               # Don't forget version if it is 3.2v4 or newer.
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -sco5v6*)
-               # Don't forget version if it is 3.2v4 or newer.
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -sco*)
-               os=-sco3.2v2
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -udk*)
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -isc)
-               os=-isc2.2
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -clix*)
-               basic_machine=clipper-intergraph
-               ;;
-       -isc*)
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-pc/'`
-               ;;
-       -lynx*178)
-               os=-lynxos178
-               ;;
-       -lynx*5)
-               os=-lynxos5
-               ;;
-       -lynx*)
-               os=-lynxos
+# Separate into logical components for further validation
+case $1 in
+       *-*-*-*-*)
+               echo Invalid configuration \`"$1"\': more than four components >&2
+               exit 1
                ;;
-       -ptx*)
-               basic_machine=`echo $1 | sed -e 's/86-.*/86-sequent/'`
+       *-*-*-*)
+               basic_machine=$field1-$field2
+               basic_os=$field3-$field4
                ;;
-       -windowsnt*)
-               os=`echo $os | sed -e 's/windowsnt/winnt/'`
+       *-*-*)
+               # Ambiguous whether COMPANY is present, or skipped and KERNEL-OS is two
+               # parts
+               maybe_os=$field2-$field3
+               case $maybe_os in
+                       nto-qnx* | linux-* | uclinux-uclibc* \
+                       | uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | netbsd*-gnu* \
+                       | netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
+                       | storm-chaos* | os2-emx* | rtmk-nova* | managarm-*)
+                               basic_machine=$field1
+                               basic_os=$maybe_os
+                               ;;
+                       android-linux)
+                               basic_machine=$field1-unknown
+                               basic_os=linux-android
+                               ;;
+                       *)
+                               basic_machine=$field1-$field2
+                               basic_os=$field3
+                               ;;
+               esac
                ;;
-       -psos*)
-               os=-psos
+       *-*)
+               # 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=$field2
+                                               ;;
+                                       zephyr*)
+                                               basic_machine=$field1-unknown
+                                               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
                ;;
-       -mint | -mint[0-9]*)
-               basic_machine=m68k-atari
-               os=-mint
+       *)
+               # 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 aliases for certain CPU-COMPANY combinations.
+# Decode 1-component or ad-hoc basic machines
 case $basic_machine in
-       # Recognize the basic CPU types without company name.
-       # Some are omitted here because they have special meanings below.
-       1750a | 580 \
-       | a29k \
-       | aarch64 | aarch64_be \
-       | alpha | alphaev[4-8] | alphaev56 | alphaev6[78] | alphapca5[67] \
-       | alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] | alpha64pca5[67] \
-       | am33_2.0 \
-       | arc | arceb \
-       | arm | arm[bl]e | arme[lb] | armv[2-8] | armv[3-8][lb] | armv7[arm] \
-       | avr | avr32 \
-       | be32 | be64 \
-       | bfin \
-       | c4x | c8051 | clipper \
-       | d10v | d30v | dlx | dsp16xx \
-       | epiphany \
-       | fido | fr30 | frv \
-       | h8300 | h8500 | hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
-       | hexagon \
-       | i370 | i860 | i960 | ia64 \
-       | ip2k | iq2000 \
-       | k1om \
-       | le32 | le64 \
-       | lm32 \
-       | m32c | m32r | m32rle | m68000 | m68k | m88k \
-       | maxq | mb | microblaze | microblazeel | mcore | mep | metag \
-       | mips | mipsbe | mipseb | mipsel | mipsle \
-       | mips16 \
-       | mips64 | 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 \
-       | mn10200 | mn10300 \
-       | moxie \
-       | mt \
-       | msp430 \
-       | nds32 | nds32le | nds32be \
-       | nios | nios2 | nios2eb | nios2el \
-       | ns16k | ns32k \
-       | open8 | or1k | or1knd | or32 \
-       | pdp10 | pdp11 | pj | pjl \
-       | powerpc | powerpc64 | powerpc64le | powerpcle \
-       | pyramid \
-       | riscv32 | riscv64 \
-       | rl78 | rx \
-       | score \
-       | sh | sh[1234] | sh[24]a | sh[24]aeb | sh[23]e | sh[34]eb | sheb | shbe | shle | sh[1234]le | sh3ele \
-       | sh64 | sh64le \
-       | sparc | sparc64 | sparc64b | sparc64v | sparc86x | sparclet | sparclite \
-       | sparcv8 | sparcv9 | sparcv9b | sparcv9v \
-       | spu \
-       | tahoe | tic4x | tic54x | tic55x | tic6x | tic80 | tron \
-       | ubicom32 \
-       | v850 | v850e | v850e1 | v850e2 | v850es | v850e2v3 \
-       | visium \
-       | we32k \
-       | x86 | xc16x | xstormy16 | xtensa \
-       | z8k | z80)
-               basic_machine=$basic_machine-unknown
-               ;;
-       c54x)
-               basic_machine=tic54x-unknown
-               ;;
-       c55x)
-               basic_machine=tic55x-unknown
-               ;;
-       c6x)
-               basic_machine=tic6x-unknown
-               ;;
-       leon|leon[3-9])
-               basic_machine=sparc-$basic_machine
-               ;;
-       m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x | nvptx | picochip)
-               basic_machine=$basic_machine-unknown
-               os=-none
+       # 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
                ;;
-       m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65 | z8k)
+       op50n)
+               cpu=hppa1.1
+               vendor=oki
                ;;
-       ms1)
-               basic_machine=mt-unknown
+       op60c)
+               cpu=hppa1.1
+               vendor=oki
                ;;
-
-       strongarm | thumb | xscale)
-               basic_machine=arm-unknown
+       ibm*)
+               cpu=i370
+               vendor=ibm
                ;;
-       xgate)
-               basic_machine=$basic_machine-unknown
-               os=-none
+       orion105)
+               cpu=clipper
+               vendor=highlevel
                ;;
-       xscaleeb)
-               basic_machine=armeb-unknown
+       mac | mpw | mac-mpw)
+               cpu=m68k
+               vendor=apple
                ;;
-
-       xscaleel)
-               basic_machine=armel-unknown
+       pmac | pmac-mpw)
+               cpu=powerpc
+               vendor=apple
                ;;
 
-       # 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)
-         basic_machine=$basic_machine-pc
-         ;;
-       # Object if more than one company name word.
-       *-*-*)
-               echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
-               exit 1
-               ;;
-       # Recognize the basic CPU types with company name.
-       580-* \
-       | a29k-* \
-       | aarch64-* | aarch64_be-* \
-       | alpha-* | alphaev[4-8]-* | alphaev56-* | alphaev6[78]-* \
-       | alpha64-* | alpha64ev[4-8]-* | alpha64ev56-* | alpha64ev6[78]-* \
-       | alphapca5[67]-* | alpha64pca5[67]-* | arc-* | arceb-* \
-       | arm-*  | armbe-* | armle-* | armeb-* | armv*-* \
-       | avr-* | avr32-* \
-       | be32-* | be64-* \
-       | bfin-* | bs2000-* \
-       | c[123]* | c30-* | [cjt]90-* | c4x-* \
-       | c8051-* | clipper-* | craynv-* | cydra-* \
-       | d10v-* | d30v-* | dlx-* \
-       | elxsi-* \
-       | f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
-       | h8300-* | h8500-* \
-       | hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
-       | hexagon-* \
-       | i*86-* | i860-* | i960-* | ia64-* \
-       | ip2k-* | iq2000-* \
-       | k1om-* \
-       | le32-* | le64-* \
-       | lm32-* \
-       | m32c-* | m32r-* | m32rle-* \
-       | m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
-       | m88110-* | m88k-* | maxq-* | mcore-* | metag-* \
-       | microblaze-* | microblazeel-* \
-       | mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
-       | mips16-* \
-       | mips64-* | 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-* \
-       | mt-* \
-       | msp430-* \
-       | nds32-* | nds32le-* | nds32be-* \
-       | nios-* | nios2-* | nios2eb-* | nios2el-* \
-       | none-* | np1-* | ns16k-* | ns32k-* \
-       | open8-* \
-       | or1k*-* \
-       | orion-* \
-       | pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
-       | powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
-       | pyramid-* \
-       | rl78-* | romp-* | rs6000-* | rx-* \
-       | sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* | sheb-* | shbe-* \
-       | shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
-       | sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | sparclet-* \
-       | sparclite-* \
-       | sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx?-* \
-       | tahoe-* \
-       | tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
-       | tile*-* \
-       | tron-* \
-       | ubicom32-* \
-       | v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \
-       | vax-* \
-       | visium-* \
-       | we32k-* \
-       | x86-* | x86_64-* | xc16x-* | xps100-* \
-       | xstormy16-* | xtensa*-* \
-       | ymp-* \
-       | z8k-* | z80-*)
-               ;;
-       # Recognize the basic CPU types without company name, with glob match.
-       xtensa*)
-               basic_machine=$basic_machine-unknown
-               ;;
        # Recognize the various machine names and aliases which stand
        # for a CPU type and a company and sometimes even an OS.
-       386bsd)
-               basic_machine=i386-unknown
-               os=-bsd
-               ;;
        3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
-               basic_machine=m68000-att
+               cpu=m68000
+               vendor=att
                ;;
        3b*)
-               basic_machine=we32k-att
-               ;;
-       a29khif)
-               basic_machine=a29k-amd
-               os=-udi
-               ;;
-       abacus)
-               basic_machine=abacus-unknown
-               ;;
-       adobe68k)
-               basic_machine=m68010-adobe
-               os=-scout
-               ;;
-       alliant | fx80)
-               basic_machine=fx80-alliant
-               ;;
-       altos | altos3068)
-               basic_machine=m68k-altos
-               ;;
-       am29k)
-               basic_machine=a29k-none
-               os=-bsd
-               ;;
-       amd64)
-               basic_machine=x86_64-pc
-               ;;
-       amd64-*)
-               basic_machine=x86_64-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       amdahl)
-               basic_machine=580-amdahl
-               os=-sysv
-               ;;
-       amiga | amiga-*)
-               basic_machine=m68k-unknown
-               ;;
-       amigaos | amigados)
-               basic_machine=m68k-unknown
-               os=-amigaos
-               ;;
-       amigaunix | amix)
-               basic_machine=m68k-unknown
-               os=-sysv4
-               ;;
-       apollo68)
-               basic_machine=m68k-apollo
-               os=-sysv
-               ;;
-       apollo68bsd)
-               basic_machine=m68k-apollo
-               os=-bsd
-               ;;
-       aros)
-               basic_machine=i386-pc
-               os=-aros
-               ;;
-       aux)
-               basic_machine=m68k-apple
-               os=-aux
-               ;;
-       balance)
-               basic_machine=ns32k-sequent
-               os=-dynix
-               ;;
-       blackfin)
-               basic_machine=bfin-unknown
-               os=-linux
-               ;;
-       blackfin-*)
-               basic_machine=bfin-`echo $basic_machine | sed 's/^[^-]*-//'`
-               os=-linux
+               cpu=we32k
+               vendor=att
                ;;
        bluegene*)
-               basic_machine=powerpc-ibm
-               os=-cnk
-               ;;
-       c54x-*)
-               basic_machine=tic54x-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       c55x-*)
-               basic_machine=tic55x-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       c6x-*)
-               basic_machine=tic6x-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       c90)
-               basic_machine=c90-cray
-               os=-unicos
-               ;;
-       cegcc)
-               basic_machine=arm-unknown
-               os=-cegcc
-               ;;
-       convex-c1)
-               basic_machine=c1-convex
-               os=-bsd
-               ;;
-       convex-c2)
-               basic_machine=c2-convex
-               os=-bsd
-               ;;
-       convex-c32)
-               basic_machine=c32-convex
-               os=-bsd
-               ;;
-       convex-c34)
-               basic_machine=c34-convex
-               os=-bsd
-               ;;
-       convex-c38)
-               basic_machine=c38-convex
-               os=-bsd
-               ;;
-       cray | j90)
-               basic_machine=j90-cray
-               os=-unicos
-               ;;
-       craynv)
-               basic_machine=craynv-cray
-               os=-unicosmp
-               ;;
-       cr16 | cr16-*)
-               basic_machine=cr16-unknown
-               os=-elf
-               ;;
-       crds | unos)
-               basic_machine=m68k-crds
-               ;;
-       crisv32 | crisv32-* | etraxfs*)
-               basic_machine=crisv32-axis
-               ;;
-       cris | cris-* | etrax*)
-               basic_machine=cris-axis
-               ;;
-       crx)
-               basic_machine=crx-unknown
-               os=-elf
-               ;;
-       da30 | da30-*)
-               basic_machine=m68k-da30
-               ;;
-       decstation | decstation-3100 | pmax | pmax-* | pmin | dec3100 | decstatn)
-               basic_machine=mips-dec
+               cpu=powerpc
+               vendor=ibm
+               basic_os=cnk
                ;;
        decsystem10* | dec10*)
-               basic_machine=pdp10-dec
-               os=-tops10
+               cpu=pdp10
+               vendor=dec
+               basic_os=tops10
                ;;
        decsystem20* | dec20*)
-               basic_machine=pdp10-dec
-               os=-tops20
+               cpu=pdp10
+               vendor=dec
+               basic_os=tops20
                ;;
        delta | 3300 | motorola-3300 | motorola-delta \
              | 3300-motorola | delta-motorola)
-               basic_machine=m68k-motorola
-               ;;
-       delta88)
-               basic_machine=m88k-motorola
-               os=-sysv3
-               ;;
-       dicos)
-               basic_machine=i686-pc
-               os=-dicos
-               ;;
-       djgpp)
-               basic_machine=i586-pc
-               os=-msdosdjgpp
-               ;;
-       dpx20 | dpx20-*)
-               basic_machine=rs6000-bull
-               os=-bosx
+               cpu=m68k
+               vendor=motorola
                ;;
-       dpx2* | dpx2*-bull)
-               basic_machine=m68k-bull
-               os=-sysv3
-               ;;
-       ebmon29k)
-               basic_machine=a29k-amd
-               os=-ebmon
-               ;;
-       elxsi)
-               basic_machine=elxsi-elxsi
-               os=-bsd
+       dpx2*)
+               cpu=m68k
+               vendor=bull
+               basic_os=sysv3
                ;;
        encore | umax | mmax)
-               basic_machine=ns32k-encore
+               cpu=ns32k
+               vendor=encore
                ;;
-       es1800 | OSE68k | ose68k | ose | OSE)
-               basic_machine=m68k-ericsson
-               os=-ose
+       elxsi)
+               cpu=elxsi
+               vendor=elxsi
+               basic_os=${basic_os:-bsd}
                ;;
        fx2800)
-               basic_machine=i860-alliant
+               cpu=i860
+               vendor=alliant
                ;;
        genix)
-               basic_machine=ns32k-ns
-               ;;
-       gmicro)
-               basic_machine=tron-gmicro
-               os=-sysv
-               ;;
-       go32)
-               basic_machine=i386-pc
-               os=-go32
+               cpu=ns32k
+               vendor=ns
                ;;
        h3050r* | hiux*)
-               basic_machine=hppa1.1-hitachi
-               os=-hiuxwe2
-               ;;
-       h8300hms)
-               basic_machine=h8300-hitachi
-               os=-hms
-               ;;
-       h8300xray)
-               basic_machine=h8300-hitachi
-               os=-xray
-               ;;
-       h8500hms)
-               basic_machine=h8500-hitachi
-               os=-hms
-               ;;
-       harris)
-               basic_machine=m88k-harris
-               os=-sysv3
-               ;;
-       hp300-*)
-               basic_machine=m68k-hp
-               ;;
-       hp300bsd)
-               basic_machine=m68k-hp
-               os=-bsd
-               ;;
-       hp300hpux)
-               basic_machine=m68k-hp
-               os=-hpux
+               cpu=hppa1.1
+               vendor=hitachi
+               basic_os=hiuxwe2
                ;;
        hp3k9[0-9][0-9] | hp9[0-9][0-9])
-               basic_machine=hppa1.0-hp
+               cpu=hppa1.0
+               vendor=hp
                ;;
        hp9k2[0-9][0-9] | hp9k31[0-9])
-               basic_machine=m68000-hp
+               cpu=m68000
+               vendor=hp
                ;;
        hp9k3[2-9][0-9])
-               basic_machine=m68k-hp
+               cpu=m68k
+               vendor=hp
                ;;
        hp9k6[0-9][0-9] | hp6[0-9][0-9])
-               basic_machine=hppa1.0-hp
+               cpu=hppa1.0
+               vendor=hp
                ;;
        hp9k7[0-79][0-9] | hp7[0-79][0-9])
-               basic_machine=hppa1.1-hp
+               cpu=hppa1.1
+               vendor=hp
                ;;
        hp9k78[0-9] | hp78[0-9])
                # FIXME: really hppa2.0-hp
-               basic_machine=hppa1.1-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
-               basic_machine=hppa1.1-hp
+               cpu=hppa1.1
+               vendor=hp
                ;;
        hp9k8[0-9][13679] | hp8[0-9][13679])
-               basic_machine=hppa1.1-hp
+               cpu=hppa1.1
+               vendor=hp
                ;;
        hp9k8[0-9][0-9] | hp8[0-9][0-9])
-               basic_machine=hppa1.0-hp
-               ;;
-       hppa-next)
-               os=-nextstep3
-               ;;
-       hppaosf)
-               basic_machine=hppa1.1-hp
-               os=-osf
-               ;;
-       hppro)
-               basic_machine=hppa1.1-hp
-               os=-proelf
-               ;;
-       i370-ibm* | ibm*)
-               basic_machine=i370-ibm
+               cpu=hppa1.0
+               vendor=hp
                ;;
        i*86v32)
-               basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
-               os=-sysv32
+               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               vendor=pc
+               basic_os=sysv32
                ;;
        i*86v4*)
-               basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
-               os=-sysv4
+               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               vendor=pc
+               basic_os=sysv4
                ;;
        i*86v)
-               basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
-               os=-sysv
+               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               vendor=pc
+               basic_os=sysv
                ;;
        i*86sol2)
-               basic_machine=`echo $1 | sed -e 's/86.*/86-pc/'`
-               os=-solaris2
+               cpu=`echo "$1" | sed -e 's/86.*/86/'`
+               vendor=pc
+               basic_os=solaris2
                ;;
-       i386mach)
-               basic_machine=i386-mach
-               os=-mach
-               ;;
-       i386-vsta | vsta)
-               basic_machine=i386-unknown
-               os=-vsta
+       j90 | j90-cray)
+               cpu=j90
+               vendor=cray
+               basic_os=${basic_os:-unicos}
                ;;
        iris | iris4d)
-               basic_machine=mips-sgi
-               case $os in
-                   -irix*)
+               cpu=mips
+               vendor=sgi
+               case $basic_os in
+                   irix*)
                        ;;
                    *)
-                       os=-irix4
+                       basic_os=irix4
                        ;;
                esac
                ;;
-       isi68 | isi)
-               basic_machine=m68k-isi
-               os=-sysv
-               ;;
-       leon-*|leon[3-9]-*)
-               basic_machine=sparc-`echo $basic_machine | sed 's/-.*//'`
-               ;;
-       m68knommu)
-               basic_machine=m68k-unknown
-               os=-linux
-               ;;
-       m68knommu-*)
-               basic_machine=m68k-`echo $basic_machine | sed 's/^[^-]*-//'`
-               os=-linux
-               ;;
-       m88k-omron*)
-               basic_machine=m88k-omron
-               ;;
-       magnum | m3230)
-               basic_machine=mips-mips
-               os=-sysv
-               ;;
-       merlin)
-               basic_machine=ns32k-utek
-               os=-sysv
-               ;;
-       microblaze*)
-               basic_machine=microblaze-xilinx
-               ;;
-       mingw64)
-               basic_machine=x86_64-pc
-               os=-mingw64
-               ;;
-       mingw32)
-               basic_machine=i686-pc
-               os=-mingw32
-               ;;
-       mingw32ce)
-               basic_machine=arm-unknown
-               os=-mingw32ce
-               ;;
        miniframe)
-               basic_machine=m68000-convergent
-               ;;
-       *mint | -mint[0-9]* | *MiNT | *MiNT[0-9]*)
-               basic_machine=m68k-atari
-               os=-mint
-               ;;
-       mips3*-*)
-               basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`
-               ;;
-       mips3*)
-               basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
+               cpu=m68000
+               vendor=convergent
                ;;
-       monitor)
-               basic_machine=m68k-rom68k
-               os=-coff
-               ;;
-       morphos)
-               basic_machine=powerpc-unknown
-               os=-morphos
-               ;;
-       moxiebox)
-               basic_machine=moxie-unknown
-               os=-moxiebox
-               ;;
-       msdos)
-               basic_machine=i386-pc
-               os=-msdos
-               ;;
-       ms1-*)
-               basic_machine=`echo $basic_machine | sed -e 's/ms1-/mt-/'`
-               ;;
-       msys)
-               basic_machine=i686-pc
-               os=-msys
-               ;;
-       mvs)
-               basic_machine=i370-ibm
-               os=-mvs
-               ;;
-       nacl)
-               basic_machine=le32-unknown
-               os=-nacl
-               ;;
-       ncr3000)
-               basic_machine=i486-ncr
-               os=-sysv4
-               ;;
-       netbsd386)
-               basic_machine=i386-unknown
-               os=-netbsd
-               ;;
-       netwinder)
-               basic_machine=armv4l-rebel
-               os=-linux
-               ;;
-       news | news700 | news800 | news900)
-               basic_machine=m68k-sony
-               os=-newsos
-               ;;
-       news1000)
-               basic_machine=m68030-sony
-               os=-newsos
+       *mint | mint[0-9]* | *MiNT | *MiNT[0-9]*)
+               cpu=m68k
+               vendor=atari
+               basic_os=mint
                ;;
        news-3600 | risc-news)
-               basic_machine=mips-sony
-               os=-newsos
-               ;;
-       necv70)
-               basic_machine=v70-nec
-               os=-sysv
-               ;;
-       next | m*-next )
-               basic_machine=m68k-next
-               case $os in
-                   -nextstep* )
+               cpu=mips
+               vendor=sony
+               basic_os=newsos
+               ;;
+       next | m*-next)
+               cpu=m68k
+               vendor=next
+               case $basic_os in
+                   openstep*)
+                       ;;
+                   nextstep*)
                        ;;
-                   -ns2*)
-                     os=-nextstep2
+                   ns2*)
+                     basic_os=nextstep2
                        ;;
                    *)
-                     os=-nextstep3
+                     basic_os=nextstep3
                        ;;
                esac
                ;;
-       nh3000)
-               basic_machine=m68k-harris
-               os=-cxux
-               ;;
-       nh[45]000)
-               basic_machine=m88k-harris
-               os=-cxux
-               ;;
-       nindy960)
-               basic_machine=i960-intel
-               os=-nindy
-               ;;
-       mon960)
-               basic_machine=i960-intel
-               os=-mon960
-               ;;
-       nonstopux)
-               basic_machine=mips-compaq
-               os=-nonstopux
-               ;;
        np1)
-               basic_machine=np1-gould
-               ;;
-       neo-tandem)
-               basic_machine=neo-tandem
-               ;;
-       nse-tandem)
-               basic_machine=nse-tandem
-               ;;
-       nsr-tandem)
-               basic_machine=nsr-tandem
+               cpu=np1
+               vendor=gould
                ;;
        op50n-* | op60c-*)
-               basic_machine=hppa1.1-oki
-               os=-proelf
-               ;;
-       openrisc | openrisc-*)
-               basic_machine=or32-unknown
-               ;;
-       os400)
-               basic_machine=powerpc-ibm
-               os=-os400
-               ;;
-       OSE68000 | ose68000)
-               basic_machine=m68000-ericsson
-               os=-ose
-               ;;
-       os68k)
-               basic_machine=m68k-none
-               os=-os68k
+               cpu=hppa1.1
+               vendor=oki
+               basic_os=proelf
                ;;
        pa-hitachi)
-               basic_machine=hppa1.1-hitachi
-               os=-hiuxwe2
-               ;;
-       paragon)
-               basic_machine=i860-intel
-               os=-osf
-               ;;
-       parisc)
-               basic_machine=hppa-unknown
-               os=-linux
-               ;;
-       parisc-*)
-               basic_machine=hppa-`echo $basic_machine | sed 's/^[^-]*-//'`
-               os=-linux
+               cpu=hppa1.1
+               vendor=hitachi
+               basic_os=hiuxwe2
                ;;
        pbd)
-               basic_machine=sparc-tti
+               cpu=sparc
+               vendor=tti
                ;;
        pbb)
-               basic_machine=m68k-tti
-               ;;
-       pc532 | pc532-*)
-               basic_machine=ns32k-pc532
-               ;;
-       pc98)
-               basic_machine=i386-pc
-               ;;
-       pc98-*)
-               basic_machine=i386-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       pentium | p5 | k5 | k6 | nexgen | viac3)
-               basic_machine=i586-pc
-               ;;
-       pentiumpro | p6 | 6x86 | athlon | athlon_*)
-               basic_machine=i686-pc
-               ;;
-       pentiumii | pentium2 | pentiumiii | pentium3)
-               basic_machine=i686-pc
+               cpu=m68k
+               vendor=tti
                ;;
-       pentium4)
-               basic_machine=i786-pc
-               ;;
-       pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
-               basic_machine=i586-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       pentiumpro-* | p6-* | 6x86-* | athlon-*)
-               basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
-               basic_machine=i686-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       pentium4-*)
-               basic_machine=i786-`echo $basic_machine | sed 's/^[^-]*-//'`
+       pc532)
+               cpu=ns32k
+               vendor=pc532
                ;;
        pn)
-               basic_machine=pn-gould
-               ;;
-       power)  basic_machine=power-ibm
-               ;;
-       ppc | ppcbe)    basic_machine=powerpc-unknown
-               ;;
-       ppc-* | ppcbe-*)
-               basic_machine=powerpc-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       ppcle | powerpclittle | ppc-le | powerpc-little)
-               basic_machine=powerpcle-unknown
-               ;;
-       ppcle-* | powerpclittle-*)
-               basic_machine=powerpcle-`echo $basic_machine | sed 's/^[^-]*-//'`
+               cpu=pn
+               vendor=gould
                ;;
-       ppc64)  basic_machine=powerpc64-unknown
-               ;;
-       ppc64-*) basic_machine=powerpc64-`echo $basic_machine | sed 's/^[^-]*-//'`
-               ;;
-       ppc64le | powerpc64little | ppc64-le | powerpc64-little)
-               basic_machine=powerpc64le-unknown
-               ;;
-       ppc64le-* | powerpc64little-*)
-               basic_machine=powerpc64le-`echo $basic_machine | sed 's/^[^-]*-//'`
+       power)
+               cpu=power
+               vendor=ibm
                ;;
        ps2)
-               basic_machine=i386-ibm
-               ;;
-       pw32)
-               basic_machine=i586-unknown
-               os=-pw32
-               ;;
-       rdos | rdos64)
-               basic_machine=x86_64-pc
-               os=-rdos
-               ;;
-       rdos32)
-               basic_machine=i386-pc
-               os=-rdos
-               ;;
-       rom68k)
-               basic_machine=m68k-rom68k
-               os=-coff
+               cpu=i386
+               vendor=ibm
                ;;
        rm[46]00)
-               basic_machine=mips-siemens
+               cpu=mips
+               vendor=siemens
                ;;
        rtpc | rtpc-*)
-               basic_machine=romp-ibm
-               ;;
-       s390 | s390-*)
-               basic_machine=s390-ibm
+               cpu=romp
+               vendor=ibm
                ;;
-       s390x | s390x-*)
-               basic_machine=s390x-ibm
-               ;;
-       sa29200)
-               basic_machine=a29k-amd
-               os=-udi
+       sde)
+               cpu=mipsisa32
+               vendor=sde
+               basic_os=${basic_os:-elf}
                ;;
-       sb1)
-               basic_machine=mipsisa64sb1-unknown
+       simso-wrs)
+               cpu=sparclite
+               vendor=wrs
+               basic_os=vxworks
                ;;
-       sb1el)
-               basic_machine=mipsisa64sb1el-unknown
+       tower | tower-32)
+               cpu=m68k
+               vendor=ncr
                ;;
-       sde)
-               basic_machine=mipsisa32-sde
-               os=-elf
+       vpp*|vx|vx-*)
+               cpu=f301
+               vendor=fujitsu
                ;;
-       sei)
-               basic_machine=mips-sei
-               os=-seiux
+       w65)
+               cpu=w65
+               vendor=wdc
                ;;
-       sequent)
-               basic_machine=i386-sequent
+       w89k-*)
+               cpu=hppa1.1
+               vendor=winbond
+               basic_os=proelf
                ;;
-       sh)
-               basic_machine=sh-hitachi
-               os=-hms
+       none)
+               cpu=none
+               vendor=none
                ;;
-       sh5el)
-               basic_machine=sh5le-unknown
+       leon|leon[3-9])
+               cpu=sparc
+               vendor=$basic_machine
                ;;
-       sh64)
-               basic_machine=sh64-unknown
+       leon-*|leon[3-9]-*)
+               cpu=sparc
+               vendor=`echo "$basic_machine" | sed 's/-.*//'`
                ;;
-       sparclite-wrs | simso-wrs)
-               basic_machine=sparclite-wrs
-               os=-vxworks
+
+       *-*)
+               # shellcheck disable=SC2162
+               saved_IFS=$IFS
+               IFS="-" read cpu vendor <<EOF
+$basic_machine
+EOF
+               IFS=$saved_IFS
                ;;
-       sps7)
-               basic_machine=m68k-bull
-               os=-sysv2
+       # We use `pc' rather than `unknown'
+       # because (1) that's what they normally are, and
+       # (2) the word "unknown" tends to confuse beginning users.
+       i*86 | x86_64)
+               cpu=$basic_machine
+               vendor=pc
                ;;
-       spur)
-               basic_machine=spur-unknown
+       # 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
                ;;
-       st2000)
-               basic_machine=m68k-tandem
+       x64 | amd64)
+               cpu=x86_64
+               vendor=pc
                ;;
-       stratus)
-               basic_machine=i860-stratus
-               os=-sysv4
+       # Recognize the basic CPU types without company name.
+       *)
+               cpu=$basic_machine
+               vendor=unknown
                ;;
-       strongarm-* | thumb-*)
-               basic_machine=arm-`echo $basic_machine | sed 's/^[^-]*-//'`
+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=${basic_os:-unicosmp}
                ;;
-       sun2)
-               basic_machine=m68000-sun
+       c90-unknown | c90-cray)
+               vendor=cray
+               basic_os=${Basic_os:-unicos}
                ;;
-       sun2os3)
-               basic_machine=m68000-sun
-               os=-sunos3
+       fx80-unknown)
+               vendor=alliant
                ;;
-       sun2os4)
-               basic_machine=m68000-sun
-               os=-sunos4
+       romp-unknown)
+               vendor=ibm
                ;;
-       sun3os3)
-               basic_machine=m68k-sun
-               os=-sunos3
+       mmix-unknown)
+               vendor=knuth
                ;;
-       sun3os4)
-               basic_machine=m68k-sun
-               os=-sunos4
+       microblaze-unknown | microblazeel-unknown)
+               vendor=xilinx
                ;;
-       sun4os3)
-               basic_machine=sparc-sun
-               os=-sunos3
+       rs6000-unknown)
+               vendor=ibm
                ;;
-       sun4os4)
-               basic_machine=sparc-sun
-               os=-sunos4
+       vax-unknown)
+               vendor=dec
                ;;
-       sun4sol2)
-               basic_machine=sparc-sun
-               os=-solaris2
+       pdp11-unknown)
+               vendor=dec
                ;;
-       sun3 | sun3-*)
-               basic_machine=m68k-sun
+       we32k-unknown)
+               vendor=att
                ;;
-       sun4)
-               basic_machine=sparc-sun
+       cydra-unknown)
+               vendor=cydrome
                ;;
-       sun386 | sun386i | roadrunner)
-               basic_machine=i386-sun
+       i370-ibm*)
+               vendor=ibm
                ;;
-       sv1)
-               basic_machine=sv1-cray
-               os=-unicos
+       orion-unknown)
+               vendor=highlevel
                ;;
-       symmetry)
-               basic_machine=i386-sequent
-               os=-dynix
+       xps-unknown | xps100-unknown)
+               cpu=xps100
+               vendor=honeywell
                ;;
-       t3e)
-               basic_machine=alphaev5-cray
-               os=-unicos
+
+       # Here we normalize CPU types with a missing or matching vendor
+       armh-unknown | armh-alt)
+               cpu=armv7l
+               vendor=alt
+               basic_os=${basic_os:-linux-gnueabihf}
                ;;
-       t90)
-               basic_machine=t90-cray
-               os=-unicos
+       dpx20-unknown | dpx20-bull)
+               cpu=rs6000
+               vendor=bull
+               basic_os=${basic_os:-bosx}
                ;;
-       tile*)
-               basic_machine=$basic_machine-unknown
-               os=-linux-gnu
+
+       # Here we normalize CPU types irrespective of the vendor
+       amd64-*)
+               cpu=x86_64
                ;;
-       tx39)
-               basic_machine=mipstx39-unknown
+       blackfin-*)
+               cpu=bfin
+               basic_os=linux
                ;;
-       tx39el)
-               basic_machine=mipstx39el-unknown
+       c54x-*)
+               cpu=tic54x
                ;;
-       toad1)
-               basic_machine=pdp10-xkl
-               os=-tops20
+       c55x-*)
+               cpu=tic55x
                ;;
-       tower | tower-32)
-               basic_machine=m68k-ncr
+       c6x-*)
+               cpu=tic6x
                ;;
-       tpf)
-               basic_machine=s390x-ibm
-               os=-tpf
+       e500v[12]-*)
+               cpu=powerpc
+               basic_os=${basic_os}"spe"
                ;;
-       udi29k)
-               basic_machine=a29k-amd
-               os=-udi
+       mips3*-*)
+               cpu=mips64
                ;;
-       ultra3)
-               basic_machine=a29k-nyu
-               os=-sym1
+       ms1-*)
+               cpu=mt
                ;;
-       v810 | necv810)
-               basic_machine=v810-nec
-               os=-none
+       m68knommu-*)
+               cpu=m68k
+               basic_os=linux
                ;;
-       vaxv)
-               basic_machine=vax-dec
-               os=-sysv
+       m9s12z-* | m68hcs12z-* | hcs12z-* | s12z-*)
+               cpu=s12z
                ;;
-       vms)
-               basic_machine=vax-dec
-               os=-vms
+       openrisc-*)
+               cpu=or32
                ;;
-       vpp*|vx|vx-*)
-               basic_machine=f301-fujitsu
+       parisc-*)
+               cpu=hppa
+               basic_os=linux
                ;;
-       vxworks960)
-               basic_machine=i960-wrs
-               os=-vxworks
+       pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
+               cpu=i586
                ;;
-       vxworks68)
-               basic_machine=m68k-wrs
-               os=-vxworks
+       pentiumpro-* | p6-* | 6x86-* | athlon-* | athlon_*-*)
+               cpu=i686
                ;;
-       vxworks29k)
-               basic_machine=a29k-wrs
-               os=-vxworks
+       pentiumii-* | pentium2-* | pentiumiii-* | pentium3-*)
+               cpu=i686
                ;;
-       w65*)
-               basic_machine=w65-wdc
-               os=-none
+       pentium4-*)
+               cpu=i786
                ;;
-       w89k-*)
-               basic_machine=hppa1.1-winbond
-               os=-proelf
+       pc98-*)
+               cpu=i386
                ;;
-       xbox)
-               basic_machine=i686-pc
-               os=-mingw32
+       ppc-* | ppcbe-*)
+               cpu=powerpc
                ;;
-       xps | xps100)
-               basic_machine=xps100-honeywell
+       ppcle-* | powerpclittle-*)
+               cpu=powerpcle
                ;;
-       xscale-* | xscalee[bl]-*)
-               basic_machine=`echo $basic_machine | sed 's/^xscale/arm/'`
+       ppc64-*)
+               cpu=powerpc64
                ;;
-       ymp)
-               basic_machine=ymp-cray
-               os=-unicos
+       ppc64le-* | powerpc64little-*)
+               cpu=powerpc64le
                ;;
-       z8k-*-coff)
-               basic_machine=z8k-unknown
-               os=-sim
+       sb1-*)
+               cpu=mipsisa64sb1
                ;;
-       z80-*-coff)
-               basic_machine=z80-unknown
-               os=-sim
+       sb1el-*)
+               cpu=mipsisa64sb1el
                ;;
-       none)
-               basic_machine=none-none
-               os=-none
+       sh5e[lb]-*)
+               cpu=`echo "$cpu" | sed 's/^\(sh.\)e\(.\)$/\1\2e/'`
                ;;
-
-# Here we handle the default manufacturer of certain CPU types.  It is in
-# some cases the only manufacturer, in others, it is the most popular.
-       w89k)
-               basic_machine=hppa1.1-winbond
+       spur-*)
+               cpu=spur
                ;;
-       op50n)
-               basic_machine=hppa1.1-oki
+       strongarm-* | thumb-*)
+               cpu=arm
                ;;
-       op60c)
-               basic_machine=hppa1.1-oki
+       tx39-*)
+               cpu=mipstx39
                ;;
-       romp)
-               basic_machine=romp-ibm
+       tx39el-*)
+               cpu=mipstx39el
                ;;
-       mmix)
-               basic_machine=mmix-knuth
+       x64-*)
+               cpu=x86_64
                ;;
-       rs6000)
-               basic_machine=rs6000-ibm
+       xscale-* | xscalee[bl]-*)
+               cpu=`echo "$cpu" | sed 's/^xscale/arm/'`
                ;;
-       vax)
-               basic_machine=vax-dec
+       arm64-* | aarch64le-*)
+               cpu=aarch64
                ;;
-       pdp10)
-               # there are many clones, so DEC is not a safe bet
-               basic_machine=pdp10-unknown
+
+       # Recognize the canonical CPU Types that limit and/or modify the
+       # company names they are paired with.
+       cr16-*)
+               basic_os=${basic_os:-elf}
                ;;
-       pdp11)
-               basic_machine=pdp11-dec
+       crisv32-* | etraxfs*-*)
+               cpu=crisv32
+               vendor=axis
                ;;
-       we32k)
-               basic_machine=we32k-att
+       cris-* | etrax*-*)
+               cpu=cris
+               vendor=axis
                ;;
-       sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele)
-               basic_machine=sh-unknown
+       crx-*)
+               basic_os=${basic_os:-elf}
                ;;
-       sparc | sparcv8 | sparcv9 | sparcv9b | sparcv9v)
-               basic_machine=sparc-sun
+       neo-tandem)
+               cpu=neo
+               vendor=tandem
                ;;
-       cydra)
-               basic_machine=cydra-cydrome
+       nse-tandem)
+               cpu=nse
+               vendor=tandem
                ;;
-       orion)
-               basic_machine=orion-highlevel
+       nsr-tandem)
+               cpu=nsr
+               vendor=tandem
                ;;
-       orion105)
-               basic_machine=clipper-highlevel
+       nsv-tandem)
+               cpu=nsv
+               vendor=tandem
                ;;
-       mac | mpw | mac-mpw)
-               basic_machine=m68k-apple
+       nsx-tandem)
+               cpu=nsx
+               vendor=tandem
                ;;
-       pmac | pmac-mpw)
-               basic_machine=powerpc-apple
+       mipsallegrexel-sony)
+               cpu=mipsallegrexel
+               vendor=sony
                ;;
-       *-unknown)
-               # Make sure to match an already-canonicalized machine name.
+       tile*-*)
+               basic_os=${basic_os:-linux-gnu}
                ;;
+
        *)
-               echo Invalid configuration \`$1\': machine \`$basic_machine\' not recognized 1>&2
-               exit 1
+               # 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 | arc32 | arc64 \
+                       | 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 \
+                       | loongarch32 | loongarch64 \
+                       | 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 \
+                       | mipsisa32r3 | mipsisa32r3el \
+                       | mipsisa32r5 | mipsisa32r5el \
+                       | mipsisa32r6 | mipsisa32r6el \
+                       | mipsisa64 | mipsisa64el \
+                       | mipsisa64r2 | mipsisa64r2el \
+                       | mipsisa64r3 | mipsisa64r3el \
+                       | mipsisa64r5 | mipsisa64r5el \
+                       | 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 | riscv32be | riscv64 | riscv64be \
+                       | 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 \
+                       | thumbv7* \
+                       | 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 $basic_machine in
-       *-digital*)
-               basic_machine=`echo $basic_machine | sed 's/digital.*/dec/'`
+case $vendor in
+       digital*)
+               vendor=dec
                ;;
-       *-commodore*)
-               basic_machine=`echo $basic_machine | sed 's/commodore.*/cbm/'`
+       commodore*)
+               vendor=cbm
                ;;
        *)
                ;;
@@ -1340,200 +1306,219 @@ esac
 
 # Decode manufacturer-specific aliases for certain operating systems.
 
-if [ x"$os" != x"" ]
+if test x$basic_os != x
 then
+
+# First recognize some ad-hoc cases, 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
+               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|'`
+               ;;
+       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
+       # 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
                ;;
-       -solaris1 | -solaris1.*)
-               os=`echo $os | sed -e 's|solaris1|sunos4|'`
+       bluegene*)
+               os=cnk
                ;;
-       -solaris)
-               os=-solaris2
+       solaris1 | solaris1.*)
+               os=`echo "$os" | sed -e 's|solaris1|sunos4|'`
                ;;
-       -svr4*)
-               os=-sysv4
+       solaris)
+               os=solaris2
                ;;
-       -unixware*)
-               os=-sysv4.2uw
+       unixware*)
+               os=sysv4.2uw
                ;;
-       -gnu/linux*)
-               os=`echo $os | sed -e 's|gnu/linux|linux-gnu|'`
+       # es1800 is here to avoid being matched by es* (a different OS)
+       es1800*)
+               os=ose
                ;;
-       # First accept the basic system types.
-       # The portable systems comes first.
-       # Each alternative MUST END IN A *, to match a version number.
-       # -sysv* is not here because it comes later, after sysvr4.
-       -gnu* | -bsd* | -mach* | -minix* | -genix* | -ultrix* | -irix* \
-             | -*vms* | -sco* | -esix* | -isc* | -aix* | -cnk* | -sunos | -sunos[34]*\
-             | -hpux* | -unos* | -osf* | -luna* | -dgux* | -auroraux* | -solaris* \
-             | -sym* | -kopensolaris* | -plan9* \
-             | -amigaos* | -amigados* | -msdos* | -newsos* | -unicos* | -aof* \
-             | -aos* | -aros* \
-             | -nindy* | -vxsim* | -vxworks* | -ebmon* | -hms* | -mvs* \
-             | -clix* | -riscos* | -uniplus* | -iris* | -rtu* | -xenix* \
-             | -hiux* | -386bsd* | -knetbsd* | -mirbsd* | -netbsd* \
-             | -bitrig* | -openbsd* | -solidbsd* \
-             | -ekkobsd* | -kfreebsd* | -freebsd* | -riscix* | -lynxos* \
-             | -bosx* | -nextstep* | -cxux* | -aout* | -elf* | -oabi* \
-             | -ptx* | -coff* | -ecoff* | -winnt* | -domain* | -vsta* \
-             | -udi* | -eabi* | -lites* | -ieee* | -go32* | -aux* \
-             | -chorusos* | -chorusrdb* | -cegcc* \
-             | -cygwin* | -msys* | -pe* | -psos* | -moss* | -proelf* | -rtems* \
-             | -mingw32* | -mingw64* | -linux-gnu* | -linux-android* \
-             | -linux-newlib* | -linux-musl* | -linux-uclibc* \
-             | -uxpv* | -beos* | -mpeix* | -udk* | -moxiebox* \
-             | -interix* | -uwin* | -mks* | -rhapsody* | -darwin* | -opened* \
-             | -openstep* | -oskit* | -conix* | -pw32* | -nonstopux* \
-             | -storm-chaos* | -tops10* | -tenex* | -tops20* | -its* \
-             | -os2* | -vos* | -palmos* | -uclinux* | -nucleus* \
-             | -morphos* | -superux* | -rtmk* | -rtmk-nova* | -windiss* \
-             | -powermax* | -dnix* | -nx6 | -nx7 | -sei* | -dragonfly* \
-             | -skyos* | -haiku* | -rdos* | -toppers* | -drops* | -es* | -tirtos*)
-       # Remember, each alternative MUST END IN *, to match a version number.
-               ;;
-       -qnx*)
-               case $basic_machine in
-                   x86-* | i*86-*)
-                       ;;
-                   *)
-                       os=-nto$os
-                       ;;
-               esac
+       # Some version numbers need modification
+       chorusos*)
+               os=chorusos
                ;;
-       -nto-qnx*)
+       isc)
+               os=isc2.2
                ;;
-       -nto*)
-               os=`echo $os | sed -e 's|nto|nto-qnx|'`
+       sco6)
+               os=sco5v6
                ;;
-       -sim | -es1800* | -hms* | -xray | -os68k* | -none* | -v88r* \
-             | -windows* | -osx | -abug | -netware* | -os9* | -beos* | -haiku* \
-             | -macos* | -mpw* | -magic* | -mmixware* | -mon960* | -lnews*)
+       sco5)
+               os=sco3.2v5
                ;;
-       -mac*)
-               os=`echo $os | sed -e 's|mac|macos|'`
+       sco4)
+               os=sco3.2v4
                ;;
-       -linux-dietlibc)
-               os=-linux-dietlibc
+       sco3.2.[4-9]*)
+               os=`echo "$os" | sed -e 's/sco3.2./sco3.2v/'`
                ;;
-       -linux*)
-               os=`echo $os | sed -e 's|linux|linux-gnu|'`
+       sco*v* | scout)
+               # Don't match below
                ;;
-       -sunos5*)
-               os=`echo $os | sed -e 's|sunos5|solaris2|'`
+       sco*)
+               os=sco3.2v2
                ;;
-       -sunos6*)
-               os=`echo $os | sed -e 's|sunos6|solaris3|'`
+       psos*)
+               os=psos
                ;;
-       -opened*)
-               os=-openedition
+       qnx*)
+               os=qnx
                ;;
-       -os400*)
-               os=-os400
+       hiux*)
+               os=hiuxwe2
                ;;
-       -wince*)
-               os=-wince
+       lynx*178)
+               os=lynxos178
                ;;
-       -osfrose*)
-               os=-osfrose
+       lynx*5)
+               os=lynxos5
                ;;
-       -osf*)
-               os=-osf
+       lynxos*)
+               # don't get caught up in next wildcard
                ;;
-       -utek*)
-               os=-bsd
+       lynx*)
+               os=lynxos
                ;;
-       -dynix*)
-               os=-bsd
+       mac[0-9]*)
+               os=`echo "$os" | sed -e 's|mac|macos|'`
                ;;
-       -acis*)
-               os=-aos
+       opened*)
+               os=openedition
                ;;
-       -atheos*)
-               os=-atheos
+       os400*)
+               os=os400
                ;;
-       -syllable*)
-               os=-syllable
+       sunos5*)
+               os=`echo "$os" | sed -e 's|sunos5|solaris2|'`
                ;;
-       -386bsd)
-               os=-bsd
+       sunos6*)
+               os=`echo "$os" | sed -e 's|sunos6|solaris3|'`
                ;;
-       -ctix* | -uts*)
-               os=-sysv
+       wince*)
+               os=wince
                ;;
-       -nova*)
-               os=-rtmk-nova
+       utek*)
+               os=bsd
                ;;
-       -ns2 )
-               os=-nextstep2
+       dynix*)
+               os=bsd
                ;;
-       -nsk*)
-               os=-nsk
+       acis*)
+               os=aos
                ;;
-       # Preserve the version number of sinix5.
-       -sinix5.*)
-               os=`echo $os | sed -e 's|sinix|sysv|'`
+       atheos*)
+               os=atheos
                ;;
-       -sinix*)
-               os=-sysv4
+       syllable*)
+               os=syllable
                ;;
-       -tpf*)
-               os=-tpf
+       386bsd)
+               os=bsd
                ;;
-       -triton*)
-               os=-sysv3
+       ctix* | uts*)
+               os=sysv
                ;;
-       -oss*)
-               os=-sysv3
+       nova*)
+               os=rtmk-nova
                ;;
-       -svr4)
-               os=-sysv4
+       ns2)
+               os=nextstep2
                ;;
-       -svr3)
-               os=-sysv3
+       # Preserve the version number of sinix5.
+       sinix5.*)
+               os=`echo "$os" | sed -e 's|sinix|sysv|'`
                ;;
-       -sysvr4)
-               os=-sysv4
+       sinix*)
+               os=sysv4
                ;;
-       # This must come after -sysvr4.
-       -sysv*)
+       tpf*)
+               os=tpf
                ;;
-       -ose*)
-               os=-ose
+       triton*)
+               os=sysv3
                ;;
-       -es1800*)
-               os=-ose
+       oss*)
+               os=sysv3
                ;;
-       -xenix)
-               os=-xenix
+       svr4*)
+               os=sysv4
                ;;
-       -*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
-               os=-mint
+       svr3)
+               os=sysv3
                ;;
-       -aros*)
-               os=-aros
+       sysvr4)
+               os=sysv4
                ;;
-       -zvmoe)
-               os=-zvmoe
+       ose*)
+               os=ose
                ;;
-       -dicos*)
-               os=-dicos
+       *mint | mint[0-9]* | *MiNT | MiNT[0-9]*)
+               os=mint
                ;;
-       -nacl*)
+       dicos*)
+               os=dicos
                ;;
-       -none)
+       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
                ;;
        *)
-               # Get rid of the `-' at the beginning of $os.
-               os=`echo $os | sed 's/[^-]*-//'`
-               echo Invalid configuration \`$1\': system \`$os\' not recognized 1>&2
-               exit 1
+               # No normalization, but not necessarily accepted, that comes below.
                ;;
 esac
+
 else
 
 # Here we handle the default operating systems that come with various machines.
@@ -1546,261 +1531,376 @@ else
 # will signal an error saying that MANUFACTURER isn't an operating
 # system, and we'll never get to this point.
 
-case $basic_machine in
+kernel=
+case $cpu-$vendor in
        score-*)
-               os=-elf
+               os=elf
                ;;
        spu-*)
-               os=-elf
+               os=elf
                ;;
        *-acorn)
-               os=-riscix1.2
+               os=riscix1.2
                ;;
        arm*-rebel)
-               os=-linux
+               kernel=linux
+               os=gnu
                ;;
        arm*-semi)
-               os=-aout
+               os=aout
                ;;
        c4x-* | tic4x-*)
-               os=-coff
+               os=coff
                ;;
        c8051-*)
-               os=-elf
+               os=elf
+               ;;
+       clipper-intergraph)
+               os=clix
                ;;
        hexagon-*)
-               os=-elf
+               os=elf
                ;;
        tic54x-*)
-               os=-coff
+               os=coff
                ;;
        tic55x-*)
-               os=-coff
+               os=coff
                ;;
        tic6x-*)
-               os=-coff
+               os=coff
                ;;
        # This must come before the *-dec entry.
        pdp10-*)
-               os=-tops20
+               os=tops20
                ;;
        pdp11-*)
-               os=-none
+               os=none
                ;;
        *-dec | vax-*)
-               os=-ultrix4.2
+               os=ultrix4.2
                ;;
        m68*-apollo)
-               os=-domain
+               os=domain
                ;;
        i386-sun)
-               os=-sunos4.0.2
+               os=sunos4.0.2
                ;;
        m68000-sun)
-               os=-sunos3
+               os=sunos3
                ;;
        m68*-cisco)
-               os=-aout
+               os=aout
                ;;
        mep-*)
-               os=-elf
+               os=elf
                ;;
        mips*-cisco)
-               os=-elf
+               os=elf
                ;;
        mips*-*)
-               os=-elf
+               os=elf
                ;;
        or32-*)
-               os=-coff
+               os=coff
                ;;
        *-tti)  # must be before sparc entry or we get the wrong os.
-               os=-sysv3
+               os=sysv3
                ;;
        sparc-* | *-sun)
-               os=-sunos4.1.1
+               os=sunos4.1.1
                ;;
-       *-be)
-               os=-beos
+       pru-*)
+               os=elf
                ;;
-       *-haiku)
-               os=-haiku
+       *-be)
+               os=beos
                ;;
        *-ibm)
-               os=-aix
+               os=aix
                ;;
        *-knuth)
-               os=-mmixware
+               os=mmixware
                ;;
        *-wec)
-               os=-proelf
+               os=proelf
                ;;
        *-winbond)
-               os=-proelf
+               os=proelf
                ;;
        *-oki)
-               os=-proelf
+               os=proelf
                ;;
        *-hp)
-               os=-hpux
+               os=hpux
                ;;
        *-hitachi)
-               os=-hiux
+               os=hiux
                ;;
        i860-* | *-att | *-ncr | *-altos | *-motorola | *-convergent)
-               os=-sysv
+               os=sysv
                ;;
        *-cbm)
-               os=-amigaos
+               os=amigaos
                ;;
        *-dg)
-               os=-dgux
+               os=dgux
                ;;
        *-dolphin)
-               os=-sysv3
+               os=sysv3
                ;;
        m68k-ccur)
-               os=-rtu
+               os=rtu
                ;;
        m88k-omron*)
-               os=-luna
+               os=luna
                ;;
-       *-next )
-               os=-nextstep
+       *-next)
+               os=nextstep
                ;;
        *-sequent)
-               os=-ptx
+               os=ptx
                ;;
        *-crds)
-               os=-unos
+               os=unos
                ;;
        *-ns)
-               os=-genix
+               os=genix
                ;;
        i370-*)
-               os=-mvs
-               ;;
-       *-next)
-               os=-nextstep3
+               os=mvs
                ;;
        *-gould)
-               os=-sysv
+               os=sysv
                ;;
        *-highlevel)
-               os=-bsd
+               os=bsd
                ;;
        *-encore)
-               os=-bsd
+               os=bsd
                ;;
        *-sgi)
-               os=-irix
+               os=irix
                ;;
        *-siemens)
-               os=-sysv4
+               os=sysv4
                ;;
        *-masscomp)
-               os=-rtu
+               os=rtu
                ;;
        f30[01]-fujitsu | f700-fujitsu)
-               os=-uxpv
+               os=uxpv
                ;;
        *-rom68k)
-               os=-coff
+               os=coff
                ;;
        *-*bug)
-               os=-coff
+               os=coff
                ;;
        *-apple)
-               os=-macos
+               os=macos
                ;;
        *-atari*)
-               os=-mint
+               os=mint
+               ;;
+       *-wrs)
+               os=vxworks
                ;;
        *)
-               os=-none
+               os=none
                ;;
 esac
+
 fi
 
+# Now, validate our (potentially fixed-up) OS.
+case $os in
+       # Sometimes we do "kernel-libc", so those need to count as OSes.
+       musl* | newlib* | relibc* | uclibc*)
+               ;;
+       # Likewise for "kernel-abi"
+       eabi* | gnueabi*)
+               ;;
+       # VxWorks passes extra cpu info in the 4th filed.
+       simlinux | simwindows | spe)
+               ;;
+       # 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* | secbsd* | 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* | serenity* \
+            | 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* | zephyr* \
+            | fiwix* | mlibc* )
+               ;;
+       # 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)
+               ;;
+       kernel* )
+               # Restricted further below
+               ;;
+       *)
+               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-relibc* | linux-uclibc* | linux-mlibc* )
+               ;;
+       uclinux-uclibc* )
+               ;;
+       managarm-mlibc* | managarm-kernel* )
+               ;;
+       -dietlibc* | -newlib* | -musl* | -relibc* | -uclibc* | -mlibc* )
+               # 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
+               ;;
+       kfreebsd*-gnu* | kopensolaris*-gnu*)
+               ;;
+       vxworks-simlinux | vxworks-simwindows | vxworks-spe)
+               ;;
+       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.
-vendor=unknown
-case $basic_machine in
-       *-unknown)
-               case $os in
-                       -riscix*)
+case $vendor in
+       unknown)
+               case $cpu-$os in
+                       *-riscix*)
                                vendor=acorn
                                ;;
-                       -sunos*)
+                       *-sunos*)
                                vendor=sun
                                ;;
-                       -cnk*|-aix*)
+                       *-cnk* | *-aix*)
                                vendor=ibm
                                ;;
-                       -beos*)
+                       *-beos*)
                                vendor=be
                                ;;
-                       -hpux*)
+                       *-hpux*)
                                vendor=hp
                                ;;
-                       -mpeix*)
+                       *-mpeix*)
                                vendor=hp
                                ;;
-                       -hiux*)
+                       *-hiux*)
                                vendor=hitachi
                                ;;
-                       -unos*)
+                       *-unos*)
                                vendor=crds
                                ;;
-                       -dgux*)
+                       *-dgux*)
                                vendor=dg
                                ;;
-                       -luna*)
+                       *-luna*)
                                vendor=omron
                                ;;
-                       -genix*)
+                       *-genix*)
                                vendor=ns
                                ;;
-                       -mvs* | -opened*)
+                       *-clix*)
+                               vendor=intergraph
+                               ;;
+                       *-mvs* | *-opened*)
+                               vendor=ibm
+                               ;;
+                       *-os400*)
                                vendor=ibm
                                ;;
-                       -os400*)
+                       s390-* | s390x-*)
                                vendor=ibm
                                ;;
-                       -ptx*)
+                       *-ptx*)
                                vendor=sequent
                                ;;
-                       -tpf*)
+                       *-tpf*)
                                vendor=ibm
                                ;;
-                       -vxsim* | -vxworks* | -windiss*)
+                       *-vxsim* | *-vxworks* | *-windiss*)
                                vendor=wrs
                                ;;
-                       -aux*)
+                       *-aux*)
                                vendor=apple
                                ;;
-                       -hms*)
+                       *-hms*)
                                vendor=hitachi
                                ;;
-                       -mpw* | -macos*)
+                       *-mpw* | *-macos*)
                                vendor=apple
                                ;;
-                       -*mint | -mint[0-9]* | -*MiNT | -MiNT[0-9]*)
+                       *-*mint | *-mint[0-9]* | *-*MiNT | *-MiNT[0-9]*)
                                vendor=atari
                                ;;
-                       -vos*)
+                       *-vos*)
                                vendor=stratus
                                ;;
                esac
-               basic_machine=`echo $basic_machine | sed "s/unknown/$vendor/"`
                ;;
 esac
 
-echo $basic_machine$os
+echo "$cpu-$vendor-${kernel:+$kernel-}$os"
 exit
 
 # Local variables:
-# eval: (add-hook 'write-file-hooks 'time-stamp)
+# eval: (add-hook 'before-save-hook 'time-stamp)
 # time-stamp-start: "timestamp='"
 # time-stamp-format: "%:y-%02m-%02d"
 # time-stamp-end: "'"