config.sub: add Zephyr RTOS support

This adds the Zephyr RTOS targets in preparation for implementing the
Zephyr RTOS-specific toolchain support.

$ make check
cd testsuite && bash config-guess.sh && rm uname
PASS: config.guess checks (136 tests)
cd testsuite && bash config-sub.sh
PASS: config.sub checks (880 tests)
PASS: config.sub idempotency checks (817 tests)
PASS: config.sub canonicalise each config.guess testcase (136 tests)

* config.sub (zephyr*): Recognize.
* doc/config.sub.1: Regenerate.
* testsuite/config-sub.data: Add testcases for *-zephyr.

Signed-off-by: Stephanos Ioannidis <root@stephanos.io>
Signed-off-by: Dmitry V. Levin <ldv@altlinux.org>

config.sub

@@ -4,7 +4,7 @@
 
 # shellcheck disable=SC2006,SC2268 # see below for rationale
 
-timestamp='2021-07-03'
+timestamp='2021-07-06'
 
 # 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
@@ -172,6 +172,10 @@ case $1 in
 						basic_machine=$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]* \
@@ -1738,7 +1742,7 @@ case $os in
 	     | skyos* | haiku* | rdos* | toppers* | drops* | es* \
 	     | onefs* | tirtos* | phoenix* | fuchsia* | redox* | bme* \
 	     | midnightbsd* | amdhsa* | unleashed* | emscripten* | wasi* \
-	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx*)
+	     | nsk* | powerunix* | genode* | zvmoe* | qnx* | emx* | zephyr*)
 		;;
 	# This one is extra strict with allowed versions
 	sco3.2v2 | sco3.2v[4-9]* | sco5v6*)

doc/config.sub.1

@@ -1,5 +1,5 @@
 .\" DO NOT MODIFY THIS FILE!  It was generated by help2man 1.47.16.
-.TH CONFIG.SUB "1" "July 2021" "GNU config.sub (2021-07-03)" "User Commands"
+.TH CONFIG.SUB "1" "July 2021" "GNU config.sub (2021-07-06)" "User Commands"
 .SH NAME
 config.sub \- validate and canonicalize a configuration triplet
 .SH SYNOPSIS

testsuite/config-sub.data

@@ -19,6 +19,7 @@ aarch64-linux					aarch64-unknown-linux-gnu
 aarch64-unknown-elf				aarch64-unknown-elf
 aarch64-unknown-linux				aarch64-unknown-linux-gnu
 aarch64-wrs-vxworks				aarch64-wrs-vxworks
+aarch64-zephyr					aarch64-unknown-zephyr
 aarch64_be					aarch64_be-unknown-none
 aarch64_be-bme					aarch64_be-unknown-bme
 aarch64_be-elf					aarch64_be-unknown-elf
@@ -61,12 +62,15 @@ apollo68bsd					m68k-apollo-bsd
 arc						arc-unknown-none
 arc-elf						arc-unknown-elf
 arc-linux					arc-unknown-linux-gnu
+arc-zephyr					arc-unknown-zephyr
 arc32						arc32-unknown-none
 arc32-elf					arc32-unknown-elf
 arc32-linux					arc32-unknown-linux-gnu
+arc32-zephyr					arc32-unknown-zephyr
 arc64						arc64-unknown-none
 arc64-elf					arc64-unknown-elf
 arc64-linux					arc64-unknown-linux-gnu
+arc64-zephyr					arc64-unknown-zephyr
 arceb						arceb-unknown-none
 arceb-elf					arceb-unknown-elf
 arceb-linux					arceb-unknown-linux-gnu
@@ -84,6 +88,7 @@ arm-uclinux-uclibcgnueabi			arm-unknown-uclinux-uclibcgnueabi
 arm-unknown-netbsdelf7.0			arm-unknown-netbsdelf7.0
 arm-unknown-none-eabi				arm-unknown-none-eabi
 arm-unknown-riscos				arm-unknown-riscos
+arm-zephyr					arm-unknown-zephyr
 arm64-apple-darwin20.0.0			aarch64-apple-darwin20.0.0
 arm64-apple-ios					aarch64-apple-ios
 armbe						armbe-unknown-none
@@ -295,6 +300,7 @@ i586-auroraux5.0				i586-pc-auroraux5.0
 i586-elf					i586-pc-elf
 i586-rdos					i586-pc-rdos
 i586-skyos					i586-pc-skyos
+i586-zephyr					i586-unknown-zephyr
 i686-android-linux				i686-unknown-linux-android
 i686-dicos					i686-pc-dicos
 i686-elf					i686-pc-elf
@@ -305,6 +311,7 @@ i686-os2-emx					i686-pc-os2-emx
 i686-wrs-vxworks				i686-wrs-vxworks
 i686-wrs-vxworks-simlinux			i686-wrs-vxworks-simlinux
 i686-wrs-vxworks-simwindows			i686-wrs-vxworks-simwindows
+i686-zephyr					i686-unknown-zephyr
 i786-elf					i786-pc-elf
 i860						i860-unknown-sysv
 i960						i960-unknown-none
@@ -389,6 +396,7 @@ mingw64						x86_64-pc-mingw64
 miniframe					m68000-convergent-sysv
 mips						mips-unknown-elf
 mips-sde-elf					mips-sde-elf
+mips-zephyr					mips-unknown-zephyr
 mips16						mips16-unknown-elf
 mips64						mips64-unknown-elf
 mips64eb					mips64eb-unknown-elf
@@ -497,6 +505,7 @@ nios						nios-unknown-none
 nios-elf					nios-unknown-elf
 nios2						nios2-unknown-none
 nios2-elf					nios2-unknown-elf
+nios2-zephyr					nios2-unknown-zephyr
 nios2eb						nios2eb-unknown-none
 nios2eb-elf					nios2eb-unknown-elf
 nios2el						nios2el-unknown-none
@@ -584,6 +593,7 @@ ppc						powerpc-unknown-none
 ppc-beos					powerpc-be-beos
 ppc-elf						powerpc-unknown-elf
 ppc-none-elf					powerpc-none-elf
+ppc-zephyr					powerpc-unknown-zephyr
 ppcbe						powerpc-unknown-none
 ppcbe-elf					powerpc-unknown-elf
 ppcbe-none-elf					powerpc-none-elf
@@ -606,12 +616,14 @@ riscv-company-hcos				riscv-company-hcos
 riscv-elf					riscv-unknown-elf
 riscv-linux					riscv-unknown-linux-gnu
 riscv-twizzler					riscv-unknown-twizzler
+riscv-zephyr					riscv-unknown-zephyr
 riscv32						riscv32-unknown-none
 riscv32-company-elf				riscv32-company-elf
 riscv32-company-hcos				riscv32-company-hcos
 riscv32-elf					riscv32-unknown-elf
 riscv32-linux					riscv32-unknown-linux-gnu
 riscv32-wrs-vxworks				riscv32-wrs-vxworks
+riscv32-zephyr					riscv32-unknown-zephyr
 riscv32be					riscv32be-unknown-none
 riscv32be-company-elf				riscv32be-company-elf
 riscv32be-company-hcos				riscv32be-company-hcos
@@ -623,6 +635,7 @@ riscv64-elf					riscv64-unknown-elf
 riscv64-hcos					riscv64-unknown-hcos
 riscv64-linux					riscv64-unknown-linux-gnu
 riscv64-wrs-vxworks				riscv64-wrs-vxworks
+riscv64-zephyr					riscv64-unknown-zephyr
 riscv64be					riscv64be-unknown-none
 riscv64be-company-elf				riscv64be-company-elf
 riscv64be-company-linux				riscv64be-company-linux-gnu
@@ -705,6 +718,7 @@ shle-elf					shle-unknown-elf
 simso-wrs					sparclite-wrs-vxworks
 sparc						sparc-sun-sunos4.1.1
 sparc-haiku					sparc-unknown-haiku
+sparc-zephyr					sparc-unknown-zephyr
 sparc64						sparc64-unknown-none
 sparc64-linux					sparc64-unknown-linux-gnu
 sparc64b					sparc64b-unknown-none
@@ -841,6 +855,7 @@ x86_64-windows					x86_64-pc-windows
 x86_64-wrs-vxworks				x86_64-wrs-vxworks
 x86_64-wrs-vxworks-simlinux			x86_64-wrs-vxworks-simlinux
 x86_64-wrs-vxworks-simwindows			x86_64-wrs-vxworks-simwindows
+x86_64-zephyr					x86_64-unknown-zephyr
 xbox						i686-pc-mingw32
 xc16x						xc16x-unknown-none
 xc16x-elf					xc16x-unknown-elf
@@ -857,6 +872,7 @@ xstormy16					xstormy16-unknown-none
 xtensa						xtensa-unknown-none
 xtensa-elf					xtensa-unknown-elf
 xtensa-linux					xtensa-unknown-linux-gnu
+xtensa-zephyr					xtensa-unknown-zephyr
 xtensa_dc232b-linux				xtensa_dc232b-unknown-linux-gnu
 ymp						ymp-cray-unicos
 z80						z80-unknown-none