update config.sub and config.guess for M1 Mac

config.sub and config.guess on LibreSSL are very old.
To build LibreSSL on M1 Mac, we need to update config.sub.

2 files changed, 2398 insertions, 1977 deletions

diff --git a/scripts/config.guess b/scripts/config.guess
index b82ee23..980b020 100644
--- a/scripts/config.guess
+++ b/scripts/config.guess
@@ -1,12 +1,14 @@
 #! /bin/sh
 # Attempt to guess a canonical system name.
-#   Copyright 1992-2015 Free Software Foundation, Inc.
+#   Copyright 1992-2022 Free Software Foundation, Inc.
 
-timestamp='2015-12-14'
+# shellcheck disable=SC2006,SC2268 # see below for rationale
+
+timestamp='2022-09-17'
 
 # 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='2015-12-14'
 # 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='2015-12-14'
 # 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+# superseded or lifted in POSIX.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 1992-2015 Free Software Foundation, Inc.
+Copyright 1992-2022 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*,
@@ -167,29 +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=`(uname -p 2>/dev/null || \
-            /sbin/$sysctl 2>/dev/null || \
-            /usr/sbin/$sysctl 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
+        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 ;;
             earmv*)
-                arch=`echo ${UNAME_MACHINE_ARCH} | sed -e 's,^e\(armv[0-9]\).*$,\1,'`
-                endian=`echo ${UNAME_MACHINE_ARCH} | sed -ne 's,^.*\(eb\)$,\1,p'`
+                arch=`echo "$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 ;;
+            *) 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
-            arm*|earm*|i386|m68k|ns32k|sh3*|sparc|vax)
-                eval $set_cc_for_build
+        # 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)
+                set_cc_for_build
                 if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
                         | grep -q __ELF__
                 then
@@ -205,10 +243,10 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
                 ;;
         esac
         # Determine ABI tags.
-        case "${UNAME_MACHINE_ARCH}" in
+        case $UNAME_MACHINE_ARCH in
             earm*)
                 expr='s/^earmv[0-9]/-eabi/;s/eb$//'
-                abi=`echo ${UNAME_MACHINE_ARCH} | sed -e "$expr"`
+                abi=`echo "$UNAME_MACHINE_ARCH" | sed -e "$expr"`
                 ;;
         esac
         # The OS release
@@ -216,43 +254,68 @@ case "${UNAME_MACHINE}:${UNAME_SYSTEM}:${UNAME_RELEASE}:${UNAME_VERSION}" in
         # 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 ${UNAME_RELEASE} | sed -e 's/[-_].*//' | cut -d. -f1,2`
+                release=`echo "$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}${release}${abi}"
-        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:*:*)
-        echo ${UNAME_MACHINE}-unknown-sortix
-        exit ;;
+        GUESS=$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 $3}'`
@@ -266,163 +329,158 @@ case "${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$UNAME_RELEASE
+        ;;
     # The situation for MiNT is a little confusing.  The machine name
     # can be virtually everything (everything which is not
     # "atarist" or "atariste" at least should have a processor
@@ -432,44 +490,44 @@ case "${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 > "$dummy.c"
 #ifdef __cplusplus
 #include <stdio.h>  /* for printf() prototype */
         int main (int argc, char *argv[]) {
@@ -478,95 +536,96 @@ case "${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()
@@ -577,77 +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>
@@ -680,13 +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
@@ -697,23 +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 ()
@@ -738,38 +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
@@ -777,139 +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 ;;
@@ -919,178 +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:*:*)
-        echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-        exit ;;
+        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:*:*)
-        echo ${UNAME_MACHINE}-unknown-linux-${LIBC}
-        exit ;;
+        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 ${UNAME_MACHINE}-pc-linux-${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
@@ -1098,12 +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
@@ -1113,11 +1246,11 @@ 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
@@ -1125,31 +1258,31 @@ EOF
         # Note: whatever this is, it MUST be the same as what config.sub
         # 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)
@@ -1157,9 +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; } ;;
@@ -1168,251 +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:*:*)
-        echo x86_64-unknown-onefs
-        exit ;;
+        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
 
@@ -1431,16 +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: "'"
diff --git a/scripts/config.sub b/scripts/config.sub
index 0cd7016..baf1512 100644
--- a/scripts/config.sub
+++ b/scripts/config.sub
@@ -1,12 +1,14 @@
 #! /bin/sh
 # Configuration validation subroutine script.
-#   Copyright 1992-2015 Free Software Foundation, Inc.
+#   Copyright 1992-2022 Free Software Foundation, Inc.
 
-timestamp='2015-12-14'
+# shellcheck disable=SC2006,SC2268 # see below for rationale
+
+timestamp='2022-09-17'
 
 # 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='2015-12-14'
 # 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='2015-12-14'
 # 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
@@ -50,6 +52,13 @@ timestamp='2015-12-14'
 #       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="\
@@ -57,7 +66,7 @@ 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
@@ -67,7 +76,7 @@ Report bugs and patches to <config-patches@gnu.org>."
 version="\
 GNU config.sub ($timestamp)
 
-Copyright 1992-2015 Free Software Foundation, Inc.
+Copyright 1992-2022 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."
@@ -89,12 +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 ;;
 
     * )
@@ -110,1234 +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 $maybe_os in
-  nto-qnx* | linux-gnu* | linux-android* | linux-dietlibc | linux-newlib* | \
-  linux-musl* | linux-uclibc* | uclinux-uclibc* | uclinux-gnu* | kfreebsd*-gnu* | \
-  knetbsd*-gnu* | netbsd*-gnu* | netbsd*-eabi* | \
-  kopensolaris*-gnu* | \
-  storm-chaos* | os2-emx* | rtmk-nova*)
-    os=-$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 \
-        | ba \
-        | be32 | be64 \
-        | bfin \
-        | c4x | c8051 | clipper \
-        | d10v | d30v | dlx | dsp16xx \
-        | e2k | epiphany \
-        | fido | fr30 | frv | ft32 \
-        | 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[234]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-* \
-        | ba-* \
-        | be32-* | be64-* \
-        | bfin-* | bs2000-* \
-        | c[123]* | c30-* | [cjt]90-* | c4x-* \
-        | c8051-* | clipper-* | craynv-* | cydra-* \
-        | d10v-* | d30v-* | dlx-* \
-        | e2k-* | 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-* \
-        | riscv32-* | riscv64-* \
-        | 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
-                ;;
-        asmjs)
-                basic_machine=asmjs-unknown
-                ;;
-        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
+                cpu=m68k
+                vendor=motorola
                 ;;
-        dpx20 | dpx20-*)
-                basic_machine=rs6000-bull
-                os=-bosx
-                ;;
-        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
-                ;;
-        i386mach)
-                basic_machine=i386-mach
-                os=-mach
+                cpu=`echo "$1" | sed -e 's/86.*/86/'`
+                vendor=pc
+                basic_os=solaris2
                 ;;
-        i386-vsta | vsta)
-                basic_machine=i386-unknown
-                os=-vsta
+        j90 | j90-cray)
+                cpu=j90
+                vendor=cray
+                basic_os=${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/'`
+                cpu=m68000
+                vendor=convergent
                 ;;
-        mips3*)
-                basic_machine=`echo $basic_machine | sed -e 's/mips3/mips64/'`-unknown
-                ;;
-        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-* | athalon_*-*)
+                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
                 ;;
         *)
                 ;;
@@ -1345,201 +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* | -cloudabi* | -sortix* \
-              | -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* \
-              | -onefs* | -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.
@@ -1552,261 +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: "'"