Synchronize config.sub and config.guess with their upstream master versions.

Brings in:
commit 28ea239c53a2d5d8800c472bc2452eaa16e37af2    config.sub: Remove windows-gnu
commit a6976af01b0c6206561782183a0db42124b19f7b    config.sub: recognise ARM64EC machine type
commit 4e60c54be77f743ff8018ab58fb36fd8bc055e2a    config.sub: allow aarch64c-unknown-freebsd
commit e4786449e1c26716e3f9ea182caf472e4dbc96e0    config.guess: invoke "uname -p" from PATH for non-arm FreeBSD
commit 021155df7fad97a5ae1baa354e15a03ea14500b4    config.guess: Detect Android (as opposed to GNU/Linux)
commit 6c78704d542cebfb56d17474fe9f8395e9defb94    config.sub: add javascript-*-ghcjs
commit 2a7c4b64d4aec5c3a8a975625f0f8c369d365667    testsuite: add coverage for vendor-clobbering
commit 39c49ea712cba8ae6613ef85ab22fe7c552b48b0    config.sub: Systematize parsing of machine code formats
commit d4e37b5868ef910e3e52744c34408084bb13051c    config.sub: Handle arbitrary MIPS CPU names
commit af8d803a82436779d35ea389888788c78677804e    config.guess (aarch64:Linux:*:*): Detect 32-bit ABI
commit 602766470c886df7ae07bcfd7dcf532f0783d3e0    Add KVX MPPA detection
commit be68d790b6bc7dd84982fa6760f1448e92849e63    config.sub: Add Apple tvOS and watchOS
commit 998ba1414387b4ce1a519be234e1609bc7912e0c    config.sub: Accept $cpu-$vendor-none-{coff,elf}

config.guess

@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-06-23'
+timestamp='2023-08-22'
 
 # 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
@@ -155,6 +155,9 @@ Linux|GNU|GNU/*)
 
 	set_cc_for_build
 	cat <<-EOF > "$dummy.c"
+	#if defined(__ANDROID__)
+	LIBC=android
+	#else
 	#include <features.h>
 	#if defined(__UCLIBC__)
 	LIBC=uclibc
@@ -169,6 +172,7 @@ Linux|GNU|GNU/*)
 	LIBC=musl
 	#endif
 	#endif
+	#endif
 	EOF
 	cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
 	eval "$cc_set_libc"
@@ -904,7 +908,7 @@ EOF
 	fi
 	;;
     *:FreeBSD:*:*)
-	UNAME_PROCESSOR=`/usr/bin/uname -p`
+	UNAME_PROCESSOR=`uname -p`
 	case $UNAME_PROCESSOR in
 	    amd64)
 		UNAME_PROCESSOR=x86_64 ;;
@@ -976,7 +980,27 @@ EOF
 	GUESS=$UNAME_MACHINE-unknown-minix
 	;;
     aarch64:Linux:*:*)
-	GUESS=$UNAME_MACHINE-unknown-linux-$LIBC
+	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 __ARM_EABI__
+	    #ifdef __ARM_PCS_VFP
+	    ABI=eabihf
+	    #else
+	    ABI=eabi
+	    #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 $ABI in
+		eabi | eabihf) CPU=armv8l; LIBCABI=$LIBC$ABI ;;
+	    esac
+	fi
+	GUESS=$CPU-unknown-linux-$LIBCABI
 	;;
     aarch64_be:Linux:*:*)
 	UNAME_MACHINE=aarch64_be

config.sub

@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2023-06-26'
+timestamp='2023-09-19'
 
 # 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
@@ -1181,7 +1181,7 @@ case $cpu-$vendor in
 		case $cpu in
 			1750a | 580 \
 			| a29k \
-			| aarch64 | aarch64_be \
+			| aarch64 | aarch64_be | aarch64c | arm64ec \
 			| abacus \
 			| alpha | alphaev[4-8] | alphaev56 | alphaev6[78] \
 			| alpha64 | alpha64ev[4-8] | alpha64ev56 | alpha64ev6[78] \
@@ -1200,6 +1200,7 @@ case $cpu-$vendor in
 			| d10v | d30v | dlx | dsp16xx \
 			| e2k | elxsi | epiphany \
 			| f30[01] | f700 | fido | fr30 | frv | ft32 | fx80 \
+			| javascript \
 			| h8300 | h8500 \
 			| hppa | hppa1.[01] | hppa2.0 | hppa2.0[nw] | hppa64 \
 			| hexagon \
@@ -1215,31 +1216,7 @@ case $cpu-$vendor in
 			| m6811 | m68hc11 | m6812 | m68hc12 | m68hcs12x \
 			| m88110 | m88k | maxq | mb | mcore | mep | metag \
 			| microblaze | microblazeel \
-			| mips | mipsbe | mipseb | mipsel | mipsle \
+			| mips* \
-			| 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 \
@@ -1308,11 +1285,12 @@ esac
 
 # Decode manufacturer-specific aliases for certain operating systems.
 
-if test x$basic_os != x
+if test x"$basic_os" != x
 then
 
 # First recognize some ad-hoc cases, or perhaps split kernel-os, or else just
 # set os.
+obj=
 case $basic_os in
 	gnu/linux*)
 		kernel=linux
@@ -1512,10 +1490,16 @@ case $os in
 			os=eabi
 			;;
 		    *)
-			os=elf
+			os=
+			obj=elf
 			;;
 		esac
 		;;
+	aout* | coff* | elf* | pe*)
+		# These are machine code file formats, not OSes
+		obj=$os
+		os=
+		;;
 	*)
 		# No normalization, but not necessarily accepted, that comes below.
 		;;
@@ -1534,12 +1518,15 @@ else
 # system, and we'll never get to this point.
 
 kernel=
+obj=
 case $cpu-$vendor in
 	score-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	spu-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	*-acorn)
 		os=riscix1.2
@@ -1549,28 +1536,35 @@ case $cpu-$vendor in
 		os=gnu
 		;;
 	arm*-semi)
-		os=aout
+		os=
+		obj=aout
 		;;
 	c4x-* | tic4x-*)
-		os=coff
+		os=
+		obj=coff
 		;;
 	c8051-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	clipper-intergraph)
 		os=clix
 		;;
 	hexagon-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	tic54x-*)
-		os=coff
+		os=
+		obj=coff
 		;;
 	tic55x-*)
-		os=coff
+		os=
+		obj=coff
 		;;
 	tic6x-*)
-		os=coff
+		os=
+		obj=coff
 		;;
 	# This must come before the *-dec entry.
 	pdp10-*)
@@ -1592,19 +1586,24 @@ case $cpu-$vendor in
 		os=sunos3
 		;;
 	m68*-cisco)
-		os=aout
+		os=
+		obj=aout
 		;;
 	mep-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	mips*-cisco)
-		os=elf
+		os=
+		obj=elf
 		;;
 	mips*-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	or32-*)
-		os=coff
+		os=
+		obj=coff
 		;;
 	*-tti)	# must be before sparc entry or we get the wrong os.
 		os=sysv3
@@ -1613,7 +1612,8 @@ case $cpu-$vendor in
 		os=sunos4.1.1
 		;;
 	pru-*)
-		os=elf
+		os=
+		obj=elf
 		;;
 	*-be)
 		os=beos
@@ -1694,10 +1694,12 @@ case $cpu-$vendor in
 		os=uxpv
 		;;
 	*-rom68k)
-		os=coff
+		os=
+		obj=coff
 		;;
 	*-*bug)
-		os=coff
+		os=
+		obj=coff
 		;;
 	*-apple)
 		os=macos
@@ -1715,7 +1717,8 @@ esac
 
 fi
 
-# Now, validate our (potentially fixed-up) OS.
+# Now, validate our (potentially fixed-up) individual pieces (OS, OBJ).
+
 case $os in
 	# Sometimes we do "kernel-libc", so those need to count as OSes.
 	musl* | newlib* | relibc* | uclibc*)
@@ -1726,6 +1729,9 @@ case $os in
 	# VxWorks passes extra cpu info in the 4th filed.
 	simlinux | simwindows | spe)
 		;;
+	# See `case $cpu-$os` validation below
+	ghcjs)
+		;;
 	# Now accept the basic system types.
 	# The portable systems comes first.
 	# Each alternative MUST end in a * to match a version number.
@@ -1734,7 +1740,7 @@ case $os in
 	     | hpux* | unos* | osf* | luna* | dgux* | auroraux* | solaris* \
 	     | sym* |  plan9* | psp* | sim* | xray* | os68k* | v88r* \
 	     | hiux* | abug | nacl* | netware* | windows* \
-	     | os9* | macos* | osx* | ios* \
+	     | os9* | macos* | osx* | ios* | tvos* | watchos* \
 	     | mpw* | magic* | mmixware* | mon960* | lnews* \
 	     | amigaos* | amigados* | msdos* | newsos* | unicos* | aof* \
 	     | aos* | aros* | cloudabi* | sortix* | twizzler* \
@@ -1743,11 +1749,11 @@ case $os in
 	     | mirbsd* | netbsd* | dicos* | openedition* | ose* \
 	     | bitrig* | openbsd* | secbsd* | solidbsd* | libertybsd* | os108* \
 	     | ekkobsd* | freebsd* | riscix* | lynxos* | os400* \
-	     | bosx* | nextstep* | cxux* | aout* | elf* | oabi* \
+	     | bosx* | nextstep* | cxux* | oabi* \
-	     | ptx* | coff* | ecoff* | winnt* | domain* | vsta* \
+	     | ptx* | ecoff* | winnt* | domain* | vsta* \
 	     | udi* | lites* | ieee* | go32* | aux* | hcos* \
 	     | chorusrdb* | cegcc* | glidix* | serenity* \
-	     | cygwin* | msys* | pe* | moss* | proelf* | rtems* \
+	     | cygwin* | msys* | moss* | proelf* | rtems* \
 	     | midipix* | mingw32* | mingw64* | mint* \
 	     | uxpv* | beos* | mpeix* | udk* | moxiebox* \
 	     | interix* | uwin* | mks* | rhapsody* | darwin* \
@@ -1771,56 +1777,95 @@ case $os in
 	kernel* | msvc* )
 		# Restricted further below
 		;;
+	'')
+		if test x"$obj" = x
+		then
+			echo "Invalid configuration '$1': Blank OS only allowed with explicit machine code file format" 1>&2
+		fi
+		;;
 	*)
 		echo "Invalid configuration '$1': OS '$os' not recognized" 1>&2
 		exit 1
 		;;
 esac
 
+case $obj in
+	aout* | coff* | elf* | pe*)
+		;;
+	'')
+		# empty is fine
+		;;
+	*)
+		echo "Invalid configuration '$1': Machine code format '$obj' not recognized" 1>&2
+		exit 1
+		;;
+esac
+
+# Here we handle the constraint that a (synthetic) cpu and os are
+# valid only in combination with each other and nowhere else.
+case $cpu-$os in
+	# The "javascript-unknown-ghcjs" triple is used by GHC; we
+	# accept it here in order to tolerate that, but reject any
+	# variations.
+	javascript-ghcjs)
+		;;
+	javascript-* | *-ghcjs)
+		echo "Invalid configuration '$1': cpu '$cpu' is not valid with os '$os$obj'" 1>&2
+		exit 1
+		;;
+esac
+
 # As a final step for OS-related things, validate the OS-kernel combination
 # (given a valid OS), if there is a kernel.
-case $kernel-$os in
+case $kernel-$os-$obj in
-	linux-gnu* | linux-dietlibc* | linux-android* | linux-newlib* \
+	linux-gnu*- | linux-dietlibc*- | linux-android*- | linux-newlib*- \
-		   | linux-musl* | linux-relibc* | linux-uclibc* | linux-mlibc* )
+		   | linux-musl*- | linux-relibc*- | linux-uclibc*- | linux-mlibc*- )
 		;;
-	uclinux-uclibc* )
+	uclinux-uclibc*- )
 		;;
-	managarm-mlibc* | managarm-kernel* )
+	managarm-mlibc*- | managarm-kernel*- )
 		;;
-	windows*-gnu* | windows*-msvc*)
+	windows*-msvc*-)
 		;;
-	-dietlibc* | -newlib* | -musl* | -relibc* | -uclibc* | -mlibc* )
+	-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* )
+	-kernel*- )
 		echo "Invalid configuration '$1': '$os' needs explicit kernel." 1>&2
 		exit 1
 		;;
-	*-kernel* )
+	*-kernel*- )
 		echo "Invalid configuration '$1': '$kernel' does not support '$os'." 1>&2
 		exit 1
 		;;
-	*-msvc* )
+	*-msvc*- )
 		echo "Invalid configuration '$1': '$os' needs 'windows'." 1>&2
 		exit 1
 		;;
-	kfreebsd*-gnu* | kopensolaris*-gnu*)
+	kfreebsd*-gnu*- | kopensolaris*-gnu*-)
 		;;
-	vxworks-simlinux | vxworks-simwindows | vxworks-spe)
+	vxworks-simlinux- | vxworks-simwindows- | vxworks-spe-)
 		;;
-	nto-qnx*)
+	nto-qnx*-)
 		;;
-	os2-emx)
+	os2-emx-)
 		;;
-	*-eabi* | *-gnueabi*)
+	*-eabi*- | *-gnueabi*-)
 		;;
-	-*)
+	none--*)
+		# None (no kernel, i.e. freestanding / bare metal),
+		# can be paired with an machine code file format
+		;;
+	-*-)
 		# Blank kernel with real OS is always fine.
 		;;
-	*-*)
+	--*)
+		# Blank kernel and OS with real machine code file format is always fine.
+		;;
+	*-*-*)
 		echo "Invalid configuration '$1': Kernel '$kernel' not known to work with OS '$os'." 1>&2
 		exit 1
 		;;
@@ -1904,7 +1949,7 @@ case $vendor in
 		;;
 esac
 
-echo "$cpu-$vendor-${kernel:+$kernel-}$os"
+echo "$cpu-$vendor${kernel:+-$kernel}${os:+-$os}${obj:+-$obj}"
 exit
 
 # Local variables: