1#! /bin/sh
2# Configuration validation subroutine script.
3#   Copyright 1992-2026 Free Software Foundation, Inc.
4
5# shellcheck disable=SC2006,SC2268,SC2162 # see below for rationale
6
7timestamp='2026-05-17'
8
9# This file is free software; you can redistribute it and/or modify it
10# under the terms of the GNU General Public License as published by
11# the Free Software Foundation, either version 3 of the License, or
12# (at your option) any later version.
13#
14# This program is distributed in the hope that it will be useful, but
15# WITHOUT ANY WARRANTY; without even the implied warranty of
16# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
17# General Public License for more details.
18#
19# You should have received a copy of the GNU General Public License
20# along with this program; if not, see <https://www.gnu.org/licenses/>.
21#
22# As a special exception to the GNU General Public License, if you
23# distribute this file as part of a program that contains a
24# configuration script generated by Autoconf, you may include it under
25# the same distribution terms that you use for the rest of that
26# program.  This Exception is an additional permission under section 7
27# of the GNU General Public License, version 3 ("GPLv3").
28
29
30# Please send patches to <[email protected]>.
31#
32# Configuration subroutine to validate and canonicalize a configuration type.
33# Supply the specified configuration type as an argument.
34# If it is invalid, we print an error message on stderr and exit with code 1.
35# Otherwise, we print the canonical config type on stdout and succeed.
36
37# You can get the latest version of this script from:
38# https://git.savannah.gnu.org/cgit/config.git/plain/config.sub
39
40# This file is supposed to be the same for all GNU packages
41# and recognize all the CPU types, system types and aliases
42# that are meaningful with *any* GNU software.
43# Each package is responsible for reporting which valid configurations
44# it does not support.  The user should be able to distinguish
45# a failure to support a valid configuration from a meaningless
46# configuration.
47
48# The goal of this file is to map all the various variations of a given
49# machine specification into a single specification in the form:
50#	CPU_TYPE-MANUFACTURER-OPERATING_SYSTEM
51# or in some cases, the newer four-part form:
52#	CPU_TYPE-MANUFACTURER-KERNEL-OPERATING_SYSTEM
53# It is wrong to echo any other type of specification.
54
55# The "shellcheck disable" line above the timestamp inhibits complaints
56# about features and limitations of the classic Bourne shell that were
57# superseded or lifted in POSIX.  However, this script identifies a wide
58# variety of pre-POSIX systems that do not have POSIX shells at all, and
59# even some reasonably current systems (Solaris 10 as case-in-point) still
60# have a pre-POSIX /bin/sh.
61
62me=`echo "$0" | sed -e 's,.*/,,'`
63
64usage="\
65Usage: $0 [OPTION] CPU-MFR-OPSYS or ALIAS
66
67Canonicalize a configuration name.
68
69Options:
70  -h, --help         print this help, then exit
71  -t, --time-stamp   print date of last modification, then exit
72  -v, --version      print version number, then exit
73
74Report bugs and patches to <[email protected]>."
75
76version="\
77GNU config.sub ($timestamp)
78
79Copyright 1992-2026 Free Software Foundation, Inc.
80
81This is free software; see the source for copying conditions.  There is NO
82warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
83
84help="
85Try '$me --help' for more information."
86
87# Parse command line
88while test $# -gt 0 ; do
89  case $1 in
90    --time-stamp | --time* | -t )
91       echo "$timestamp" ; exit ;;
92    --version | -v )
93       echo "$version" ; exit ;;
94    --help | --h* | -h )
95       echo "$usage"; exit ;;
96    -- )     # Stop option processing
97       shift; break ;;
98    - )	# Use stdin as input.
99       break ;;
100    -* )
101       echo "$me: invalid option $1$help" >&2
102       exit 1 ;;
103
104    *local*)
105       # First pass through any local machine types.
106       echo "$1"
107       exit ;;
108
109    * )
110       break ;;
111  esac
112done
113
114case $# in
115 0) echo "$me: missing argument$help" >&2
116    exit 1;;
117 1) ;;
118 *) echo "$me: too many arguments$help" >&2
119    exit 1;;
120esac
121
122# Split fields of configuration type
123saved_IFS=$IFS
124IFS="-" read field1 field2 field3 field4 <<EOF
125$1
126EOF
127IFS=$saved_IFS
128
129# Separate into logical components for further validation
130case $1 in
131	*-*-*-*-*)
132		echo "Invalid configuration '$1': more than four components" >&2
133		exit 1
134		;;
135	*-*-*-*)
136		basic_machine=$field1-$field2
137		basic_os=$field3-$field4
138		;;
139	*-*-*)
140		# Ambiguous whether COMPANY is present, or skipped and KERNEL-OS is two
141		# parts
142		maybe_os=$field2-$field3
143		case $maybe_os in
144			  cloudabi*-eabi* \
145			| kfreebsd*-gnu* \
146			| knetbsd*-gnu* \
147			| kopensolaris*-gnu* \
148			| ironclad-* \
149			| linux-* \
150			| managarm-* \
151			| netbsd*-eabi* \
152			| netbsd*-gnu* \
153			| nto-qnx* \
154			| os2-emx* \
155			| rtmk-nova* \
156			| storm-chaos* \
157			| uclinux-gnu* \
158			| uclinux-uclibc* \
159			| windows-* )
160				basic_machine=$field1
161				basic_os=$maybe_os
162				;;
163			android-linux)
164				basic_machine=$field1-unknown
165				basic_os=linux-android
166				;;
167			*)
168				basic_machine=$field1-$field2
169				basic_os=$field3
170				;;
171		esac
172		;;
173	*-*)
174		case $field1-$field2 in
175			# Shorthands that happen to contain a single dash
176			convex-c[12] | convex-c3[248])
177				basic_machine=$field2-convex
178				basic_os=
179				;;
180			decstation-3100)
181				basic_machine=mips-dec
182				basic_os=
183				;;
184			*-*)
185				# Second component is usually, but not always the OS
186				case $field2 in
187					# Do not treat sunos as a manufacturer
188					sun*os*)
189						basic_machine=$field1
190						basic_os=$field2
191						;;
192					# Manufacturers
193					  3100* \
194					| 32* \
195					| 3300* \
196					| 3600* \
197					| 7300* \
198					| acorn \
199					| altos* \
200					| apollo \
201					| apple \
202					| atari \
203					| att* \
204					| axis \
205					| be \
206					| bull \
207					| cbm \
208					| ccur \
209					| cisco \
210					| commodore \
211					| convergent* \
212					| convex* \
213					| cray \
214					| crds \
215					| dec* \
216					| delta* \
217					| dg \
218					| digital \
219					| dolphin \
220					| encore* \
221					| gould \
222					| harris \
223					| highlevel \
224					| hitachi* \
225					| hp \
226					| ibm* \
227					| intergraph \
228					| isi* \
229					| knuth \
230					| masscomp \
231					| microblaze* \
232					| mips* \
233					| motorola* \
234					| ncr* \
235					| news \
236					| next \
237					| ns \
238					| oki \
239					| omron* \
240					| pc533* \
241					| rebel \
242					| rom68k \
243					| rombug \
244					| semi \
245					| sequent* \
246					| sgi* \
247					| siemens \
248					| sim \
249					| sni \
250					| sony* \