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[PATCH] * config.sub: Deduplicate `basic_machine` by always allowing th


From: John Ericson
Subject: [PATCH] * config.sub: Deduplicate `basic_machine` by always allowing the vendor
Date: Fri, 22 Jun 2018 17:40:14 -0400

Instead of having both `foo` and `foo-*` as redundant patterns, we
always make sure basic_machine is initialized in the form `*-*` by
adding a trailing `-unknown` where needed.

There were two complications to doing this however, but they were worked
around:

The first is that for some reason `basic_machine`s in the form
`*-unknown` are always accepted, dating back to
3836f7b0c4f252e56aa1124a9b235ba62c2a45da. It is important that we don't
allow the inferred `-unknown` to allow nonsense one-component basic
machines to pass for the first time.

The second is that for x86, the default is `-pc` instead of `-unknown`.
That said, an explicitly passed `-unknown` is not normalized by that
rule and left as-is. Two tests were nevertheless changed but:

        -vsta                   i386-unknown-vsta
        +vsta                   i386-pc-vsta

Seems like fixing a blatant inconsistency, while:

        -x86_64-ptx             x86_64-pc-ptx
        +x86_64-ptx             x86_64-sequent-ptx

Fixes a small regression I previously introduced.

The solution in both cases is to distinguish explicit user given from
inferred/defaulted `-unknown`s, and use that to implement the existing
behavior. For this purpose, the `vendor_inferred` variable was added.

For what it's worth, I personally feel we should consider ripping that
distinction if it's OK. But I also feel that if we do chose to do that,
the change belongs in a separate revision, so this patch is the right
first step either way.

John
---
 ChangeLog                 |   4 +
 config.sub                | 320 +++++++++++++++++-----------------------------
 testsuite/config-sub.data |   4 +-
 3 files changed, 123 insertions(+), 205 deletions(-)

diff --git a/ChangeLog b/ChangeLog
index 372559c..8586152 100644
--- a/ChangeLog
+++ b/ChangeLog
@@ -1,3 +1,7 @@
+2018-06-22  John Ericson  <address@hidden>
+
+       * config.sub: Deduplicate `basic_machine` by always allowing the vendor
+
 2018-05-24  Ben Elliston  <address@hidden>
 
        * testsuite/config-sub.data: Add tests for Sequent and DYNIX/ptx.
diff --git a/config.sub b/config.sub
index d1f5b54..8b6e358 100755
--- a/config.sub
+++ b/config.sub
@@ -2,7 +2,7 @@
 # Configuration validation subroutine script.
 #   Copyright 1992-2018 Free Software Foundation, Inc.
 
-timestamp='2018-05-24'
+timestamp='2018-06-22'
 
 # 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
@@ -124,6 +124,7 @@ case $1 in
        *-*-*-*)
                basic_machine=$field1-$field2
                os=$field3-$field4
+               vendor_inferred=
                ;;
        *-*-*)
                # Ambiguous whether COMPANY is present, or skipped and 
KERNEL-OS is two
@@ -135,16 +136,19 @@ case $1 in
                        | uclinux-gnu* | kfreebsd*-gnu* | knetbsd*-gnu* | 
netbsd*-gnu* \
                        | netbsd*-eabi* | kopensolaris*-gnu* | cloudabi*-eabi* \
                        | storm-chaos* | os2-emx* | rtmk-nova*)
-                               basic_machine=$field1
+                               basic_machine=$field1-unknown
                                os=$maybe_os
+                               vendor_inferred=1
                                ;;
                        android-linux)
                                basic_machine=$field1-unknown
                                os=linux-android
+                               vendor_inferred=
                                ;;
                        *)
                                basic_machine=$field1-$field2
                                os=$field3
+                               vendor_inferred=
                                ;;
                esac
                ;;
@@ -153,8 +157,9 @@ case $1 in
                case $field2 in
                        # Prevent following clause from handling this valid os
                        sun*os*)
-                               basic_machine=$field1
+                               basic_machine=$field1-unknown
                                os=$field2
+                               vendor_inferred=1
                                ;;
                        # Manufacturers
                        dec* | mips* | sequent* | encore* | pc532* | sgi* | 
sony* \
@@ -167,19 +172,22 @@ case $1 in
                        | sim | cisco | oki | wec | wrs | winbond)
                                basic_machine=$field1-$field2
                                os=
+                               vendor_inferred=
                                ;;
                        *)
-                               basic_machine=$field1
+                               basic_machine=$field1-unknown
                                os=$field2
+                               vendor_inferred=1
                                ;;
                esac
                ;;
        *)
+               vendor_inferred=1
                # Convert single-component short-hands not valid as part of
                # multi-component configurations.
                case $field1 in
                        386bsd)
-                               basic_machine=i386-pc
+                               basic_machine=i386-unknown
                                os=bsd
                                ;;
                        a29khif)
@@ -215,7 +223,7 @@ case $1 in
                                os=bsd
                                ;;
                        aros)
-                               basic_machine=i386-pc
+                               basic_machine=i386-unknown
                                os=aros
                                ;;
                        aux)
@@ -247,11 +255,11 @@ case $1 in
                                os=sysv3
                                ;;
                        dicos)
-                               basic_machine=i686-pc
+                               basic_machine=i686-unknown
                                os=dicos
                                ;;
                        djgpp)
-                               basic_machine=i586-pc
+                               basic_machine=i586-unknown
                                os=msdosdjgpp
                                ;;
                        ebmon29k)
@@ -267,7 +275,7 @@ case $1 in
                                os=sysv
                                ;;
                        go32)
-                               basic_machine=i386-pc
+                               basic_machine=i386-unknown
                                os=go32
                                ;;
                        h8300hms)
@@ -327,11 +335,11 @@ case $1 in
                                os=sysv
                                ;;
                        mingw64)
-                               basic_machine=x86_64-pc
+                               basic_machine=x86_64-unknown
                                os=mingw64
                                ;;
                        mingw32)
-                               basic_machine=i686-pc
+                               basic_machine=i686-unknown
                                os=mingw32
                                ;;
                        mingw32ce)
@@ -351,11 +359,11 @@ case $1 in
                                os=moxiebox
                                ;;
                        msdos)
-                               basic_machine=i386-pc
+                               basic_machine=i386-unknown
                                os=msdos
                                ;;
                        msys)
-                               basic_machine=i686-pc
+                               basic_machine=i686-unknown
                                os=msys
                                ;;
                        mvs)
@@ -435,11 +443,11 @@ case $1 in
                                os=pw32
                                ;;
                        rdos | rdos64)
-                               basic_machine=x86_64-pc
+                               basic_machine=x86_64-unknown
                                os=rdos
                                ;;
                        rdos32)
-                               basic_machine=i386-pc
+                               basic_machine=i386-unknown
                                os=rdos
                                ;;
                        rom68k)
@@ -458,6 +466,10 @@ case $1 in
                                basic_machine=m68k-bull
                                os=sysv2
                                ;;
+                       st2000)
+                               basic_machine=m68k-tandem
+                               os=
+                               ;;
                        stratus)
                                basic_machine=i860-stratus
                                os=sysv4
@@ -478,6 +490,10 @@ case $1 in
                                basic_machine=m68k-sun
                                os=sunos4
                                ;;
+                       sun4)
+                               basic_machine=sparc-sun
+                               os=
+                               ;;
                        sun4os3)
                                basic_machine=sparc-sun
                                os=sunos3
@@ -490,6 +506,10 @@ case $1 in
                                basic_machine=sparc-sun
                                os=solaris2
                                ;;
+                       sun386 | sun386i | roadrunner)
+                               basic_machine=i386-sun
+                               os=
+                               ;;
                        sv1)
                                basic_machine=sv1-cray
                                os=unicos
@@ -547,7 +567,7 @@ case $1 in
                                os=vxworks
                                ;;
                        xbox)
-                               basic_machine=i686-pc
+                               basic_machine=i686-unknown
                                os=mingw32
                                ;;
                        ymp)
@@ -555,7 +575,7 @@ case $1 in
                                os=unicos
                                ;;
                        *)
-                               basic_machine=$1
+                               basic_machine=$1-unknown
                                os=
                                ;;
                esac
@@ -564,147 +584,25 @@ esac
 
 # Decode aliases for certain CPU-COMPANY combinations.
 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] | armv6m | 
armv[78][arm] \
-       | avr | avr32 \
-       | ba \
-       | be32 | be64 \
-       | bfin \
-       | c4x | c8051 | clipper | csky \
-       | 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 | ia16 | 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 \
-       | nfp \
-       | nios | nios2 | nios2eb | nios2el \
-       | ns16k | ns32k \
-       | open8 | or1k | or1knd | or32 \
-       | pdp10 | pj | pjl \
-       | powerpc | powerpc64 | powerpc64le | powerpcle \
-       | pru \
-       | 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 \
-       | wasm32 \
-       | 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=${os:-none}
-               ;;
-       m88110 | m680[12346]0 | m683?2 | m68360 | m5200 | v70 | w65)
-               ;;
-       m9s12z | m68hcs12z | hcs12z | s12z)
-               basic_machine=s12z-unknown
-               os=${os:-none}
-               ;;
-       ms1)
-               basic_machine=mt-unknown
-               ;;
-       strongarm | thumb | xscale)
-               basic_machine=arm-unknown
-               ;;
-       xgate)
-               basic_machine=$basic_machine-unknown
-               os=${os:-none}
-               ;;
-       xscaleeb)
-               basic_machine=armeb-unknown
-               ;;
-
-       xscaleel)
-               basic_machine=armel-unknown
-               ;;
-
-       # 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
-         ;;
        # Recognize the basic CPU types with company name.
-       580-* \
+       1750a-* | 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*-* \
+       | alphapca5[67]-* | alpha64pca5[67]-* \
+       | am33_2.0-* \
+       | arc-* | arceb-* \
+       | arm-*  | arm[lb]e-* | arme[lb]-* | armv*-* \
        | avr-* | avr32-* \
        | ba-* \
        | be32-* | be64-* \
        | bfin-* | bs2000-* \
        | c[123]* | c30-* | [cjt]90-* | c4x-* \
        | c8051-* | clipper-* | craynv-* | csky-* | cydra-* \
-       | d10v-* | d30v-* | dlx-* \
-       | e2k-* | elxsi-* \
-       | f30[01]-* | f700-* | fido-* | fr30-* | frv-* | fx80-* \
+       | d10v-* | d30v-* | dlx-* | dsp16xx-* \
+       | e2k-* | elxsi-* | epiphany-* \
+       | f30[01]-* | f700-* | fido-* | fr30-* | frv-* | ft32-* \
        | h8300-* | h8500-* \
        | hppa-* | hppa1.[01]-* | hppa2.0-* | hppa2.0[nw]-* | hppa64-* \
        | hexagon-* \
@@ -714,8 +612,8 @@ case $basic_machine in
        | le32-* | le64-* \
        | lm32-* \
        | m32c-* | m32r-* | m32rle-* \
-       | m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* \
-       | m88110-* | m88k-* | maxq-* | mcore-* | metag-* \
+       | m5200 | m68000-* | m680[012346]0-* | m68360-* | m683?2-* | m68k-* | 
v70 | w65 \
+       | m88110-* | m88k-* | maxq-* | mb-* | mcore-* | mep-* | metag-* \
        | microblaze-* | microblazeel-* \
        | mips-* | mipsbe-* | mipseb-* | mipsel-* | mipsle-* \
        | mips16-* \
@@ -738,7 +636,8 @@ case $basic_machine in
        | mipsisa64sr71k-* | mipsisa64sr71kel-* \
        | mipsr5900-* | mipsr5900el-* \
        | mipstx39-* | mipstx39el-* \
-       | mmix-* \
+       | mn10200-* | mn10300-* \
+       | moxie-* \
        | mt-* \
        | msp430-* \
        | nds32-* | nds32le-* | nds32be-* \
@@ -747,37 +646,34 @@ case $basic_machine in
        | none-* | np1-* | ns16k-* | ns32k-* \
        | open8-* \
        | or1k*-* \
+       | or32-* \
        | orion-* \
-       | pdp10-* | pdp11-* | pj-* | pjl-* | pn-* | power-* \
+       | pdp10-* | pj-* | pjl-* | pn-* | power-* \
        | powerpc-* | powerpc64-* | powerpc64le-* | powerpcle-* \
        | pru-* \
        | pyramid-* \
        | riscv32-* | riscv64-* \
-       | rl78-* | romp-* | rs6000-* | rx-* \
-       | sh-* | sh[1234]-* | sh[24]a-* | sh[24]aeb-* | sh[23]e-* | sh[34]eb-* 
| sheb-* | shbe-* \
-       | shle-* | sh[1234]le-* | sh3ele-* | sh64-* | sh64le-* \
+       | rl78-* | rs6000-* | rx-* \
+       | score-* \
+       | sh-* | sh[1234]-* | sh[24]a-* | sh[24]ae[lb]-* | sh[23]e-* | 
she[lb]-* | sh[lb]e-* \
+       | sh[1234]e[lb]-* |  sh[1234][lb]e-* | sh3ele-* | sh64-* | sh64le-* \
        | sparc-* | sparc64-* | sparc64b-* | sparc64v-* | sparc86x-* | 
sparclet-* \
        | sparclite-* \
        | sparcv8-* | sparcv9-* | sparcv9b-* | sparcv9v-* | sv1-* | sx*-* \
+       | spu-* \
        | tahoe-* \
        | tic30-* | tic4x-* | tic54x-* | tic55x-* | tic6x-* | tic80-* \
-       | tile*-* \
        | tron-* \
        | ubicom32-* \
        | v850-* | v850e-* | v850e1-* | v850es-* | v850e2-* | v850e2v3-* \
        | vax-* \
        | visium-* \
        | wasm32-* \
-       | we32k-* \
-       | x86-* | x86_64-* | xc16x-* | xps100-* \
+       | x86-* | x86_64-* | xc16x-* \
        | xstormy16-* | xtensa*-* \
        | ymp-* \
        | z8k-* | z80-*)
                ;;
-       # Recognize the basic CPU types without company name, with glob match.
-       xtensa*)
-               basic_machine=$basic_machine-unknown
-               ;;
        # Recognize the various machine names and aliases which stand
        # for a CPU type and a company and sometimes even an OS.
        3b1 | 7300 | 7300-att | att-7300 | pc7300 | safari | unixpc)
@@ -786,17 +682,17 @@ case $basic_machine in
        3b*)
                basic_machine=we32k-att
                ;;
-       abacus)
+       abacus-*)
                basic_machine=abacus-unknown
                ;;
-       alliant | fx80)
+       alliant-* | fx80-*)
                basic_machine=fx80-alliant
                ;;
-       altos | altos3068)
+       altos-* | altos3068-*)
                basic_machine=m68k-altos
                ;;
        amd64)
-               basic_machine=x86_64-pc
+               basic_machine=x86_64-unknown
                ;;
        amd64-*)
                basic_machine=x86_64-`echo "$basic_machine" | sed 's/^[^-]*-//'`
@@ -804,7 +700,7 @@ case $basic_machine in
        amiga | amiga-*)
                basic_machine=m68k-unknown
                ;;
-       asmjs)
+       asmjs-*)
                basic_machine=asmjs-unknown
                ;;
        blackfin-*)
@@ -951,20 +847,22 @@ case $basic_machine in
        i370-ibm* | ibm*)
                basic_machine=i370-ibm
                ;;
+       i370-*)
+               ;;
        i*86v32)
-               basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+               basic_machine=`echo "$1" | sed -e 's/86.*/86-unknown/'`
                os=sysv32
                ;;
        i*86v4*)
-               basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+               basic_machine=`echo "$1" | sed -e 's/86.*/86-unknown/'`
                os=sysv4
                ;;
        i*86v)
-               basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+               basic_machine=`echo "$1" | sed -e 's/86.*/86-unknown/'`
                os=sysv
                ;;
        i*86sol2)
-               basic_machine=`echo "$1" | sed -e 's/86.*/86-pc/'`
+               basic_machine=`echo "$1" | sed -e 's/86.*/86-unknown/'`
                os=solaris2
                ;;
        j90 | j90-cray)
@@ -984,10 +882,17 @@ case $basic_machine in
        leon-*|leon[3-9]-*)
                basic_machine=sparc-`echo "$basic_machine" | sed 's/-.*//'`
                ;;
+       m6811-* | m68hc11-* | m6812-* | m68hc12-* | m68hcs12x-* | nvptx-* | 
picochip-*)
+               os=${os:-none}
+               ;;
        m68knommu-*)
                basic_machine=m68k-`echo "$basic_machine" | sed 's/^[^-]*-//'`
                os=linux
                ;;
+       m9s12z-* | m68hcs12z-* | hcs12z-* | s12z-*)
+               basic_machine=s12z-`echo "$basic_machine" | sed 's/^[^-]*-//'`
+               os=${os:-none}
+               ;;
        microblaze*)
                basic_machine=microblaze-xilinx
                ;;
@@ -1073,16 +978,16 @@ case $basic_machine in
                basic_machine=i386-`echo "$basic_machine" | sed 's/^[^-]*-//'`
                ;;
        pentium | p5 | k5 | k6 | nexgen | viac3)
-               basic_machine=i586-pc
+               basic_machine=i586-unknown
                ;;
        pentiumpro | p6 | 6x86 | athlon | athlon_*)
-               basic_machine=i686-pc
+               basic_machine=i686-unknown
                ;;
        pentiumii | pentium2 | pentiumiii | pentium3)
-               basic_machine=i686-pc
+               basic_machine=i686-unknown
                ;;
        pentium4)
-               basic_machine=i786-pc
+               basic_machine=i786-unknown
                ;;
        pentium-* | p5-* | k5-* | k6-* | nexgen-* | viac3-*)
                basic_machine=i586-`echo "$basic_machine" | sed 's/^[^-]*-//'`
@@ -1143,15 +1048,15 @@ case $basic_machine in
        sb1el)
                basic_machine=mipsisa64sb1el-unknown
                ;;
-       sde)
+       sde-unknown)
                basic_machine=mipsisa32-sde
                os=${os:-elf}
                ;;
-       sequent)
+       sequent-unknown)
                basic_machine=i386-sequent
                ;;
-       sh5el)
-               basic_machine=sh5le-unknown
+       sh5e[lb]-*)
+               basic_machine=`echo "$basic_machine" | sed 
's/^\(sh.\)e\(.\)-/\1\2e-/'`
                ;;
        simso-wrs)
                basic_machine=sparclite-wrs
@@ -1160,9 +1065,6 @@ case $basic_machine in
        spur)
                basic_machine=spur-unknown
                ;;
-       st2000)
-               basic_machine=m68k-tandem
-               ;;
        strongarm-* | thumb-*)
                basic_machine=arm-`echo "$basic_machine" | sed 's/^[^-]*-//'`
                ;;
@@ -1172,15 +1074,8 @@ case $basic_machine in
        sun3 | sun3-*)
                basic_machine=m68k-sun
                ;;
-       sun4)
-               basic_machine=sparc-sun
-               ;;
-       sun386 | sun386i | roadrunner)
-               basic_machine=i386-sun
-               ;;
-       tile*)
-               basic_machine=$basic_machine-unknown
-               os=linux-gnu
+       tile*-*)
+               os=${os:-linux-gnu}
                ;;
        tx39)
                basic_machine=mipstx39-unknown
@@ -1202,12 +1097,15 @@ case $basic_machine in
                basic_machine=hppa1.1-winbond
                os=proelf
                ;;
-       x64)
-               basic_machine=x86_64-pc
+       x64-*)
+               basic_machine=x86_64-unknown
                ;;
-       xps | xps100)
+       xps-* | xps100-*)
                basic_machine=xps100-honeywell
                ;;
+       xgate-*)
+               os=${os:-none}
+               ;;
        xscale-* | xscalee[bl]-*)
                basic_machine=`echo "$basic_machine" | sed 's/^xscale/arm/'`
                ;;
@@ -1227,11 +1125,15 @@ case $basic_machine in
        op60c)
                basic_machine=hppa1.1-oki
                ;;
-       romp)
-               basic_machine=romp-ibm
+       romp-*)
+               if [ x$vendor_inferred != x ]; then
+                       basic_machine=`echo "$basic_machine" | sed 
"s/-unknown$/-romp/"`
+               fi
                ;;
-       mmix)
-               basic_machine=mmix-knuth
+       mmix-*)
+               if [ x$vendor_inferred != x ]; then
+                       basic_machine=`echo "$basic_machine" | sed 
"s/-unknown$/-knuth/"`
+               fi
                ;;
        rs6000)
                basic_machine=rs6000-ibm
@@ -1239,15 +1141,12 @@ case $basic_machine in
        vax)
                basic_machine=vax-dec
                ;;
-       pdp11)
+       pdp11-*)
                basic_machine=pdp11-dec
                ;;
-       we32k)
+       we32k-*)
                basic_machine=we32k-att
                ;;
-       sh[1234] | sh[24]a | sh[24]aeb | sh[34]eb | sh[1234]le | sh[23]ele)
-               basic_machine=sh-unknown
-               ;;
        cydra)
                basic_machine=cydra-cydrome
                ;;
@@ -1264,6 +1163,10 @@ case $basic_machine in
                basic_machine=powerpc-apple
                ;;
        *-unknown)
+               if [ x$vendor_inferred != x ]; then
+                       echo Invalid configuration \`"$1"\': machine 
\`"$basic_machine"\' not recognized 1>&2
+                       exit 1
+               fi
                # Make sure to match an already-canonicalized machine name.
                ;;
        *)
@@ -1722,9 +1625,20 @@ fi
 
 # 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 $basic_machine in
        *-unknown)
+               vendor=unknown
+               if [ x$vendor_inferred != x ]; then
+                       case "$basic_machine" in
+                               i*86-* | x86_64-*)
+                                       # We use `pc' rather than `unknown' 
because (1) that's what
+                                       # they normally are, and (2) the word 
"unknown" tends to
+                                       # confuse beginning users.
+                                       vendor=pc
+                                       ;;
+                       esac
+               fi
                case $os in
                        riscix*)
                                vendor=acorn
diff --git a/testsuite/config-sub.data b/testsuite/config-sub.data
index 8013ead..7f6b608 100644
--- a/testsuite/config-sub.data
+++ b/testsuite/config-sub.data
@@ -556,7 +556,7 @@ v850e                                               
v850e-unknown-none
 v850                                           v850-unknown-none
 visium-elf                                     visium-unknown-elf
 visium                                         visium-unknown-none
-vsta                                           i386-unknown-vsta
+vsta                                           i386-pc-vsta
 wasm32                                         wasm32-unknown-none
 we32k                                          we32k-att-sysv
 x64-linux                                      x86_64-pc-linux-gnu
@@ -566,7 +566,7 @@ x86_64-ericsson-dicos                               
x86_64-ericsson-dicos
 x86_64-fuchsia                                 x86_64-pc-fuchsia
 x86_64-glidix                                  x86_64-pc-glidix
 x86_64-pc-ptx                                  x86_64-pc-ptx
-x86_64-ptx                                     x86_64-pc-ptx
+x86_64-ptx                                     x86_64-sequent-ptx
 x86_64-redox                                   x86_64-pc-redox
 x86_64-sortix                                  x86_64-pc-sortix
 x86_64-unknown-ptx                             x86_64-sequent-ptx
-- 
2.16.3




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