1#! /bin/sh
2# Attempt to guess a canonical system name.
3#   Copyright 1992-2026 Free Software Foundation, Inc.
4
5# shellcheck disable=SC2006,SC2268 # 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# Originally written by Per Bothner; maintained since 2000 by Ben Elliston.
30#
31# You can get the latest version of this script from:
32# https://git.savannah.gnu.org/cgit/config.git/plain/config.guess
33#
34# Please send patches to <[email protected]>.
35
36
37# The "shellcheck disable" line above the timestamp inhibits complaints
38# about features and limitations of the classic Bourne shell that were
39# superseded or lifted in POSIX.  However, this script identifies a wide
40# variety of pre-POSIX systems that do not have POSIX shells at all, and
41# even some reasonably current systems (Solaris 10 as case-in-point) still
42# have a pre-POSIX /bin/sh.
43
44
45me=`echo "$0" | sed -e 's,.*/,,'`
46
47usage="\
48Usage: $0 [OPTION]
49
50Output the configuration name of the system '$me' is run on.
51
52Options:
53  -h, --help         print this help, then exit
54  -t, --time-stamp   print date of last modification, then exit
55  -v, --version      print version number, then exit
56
57Report bugs and patches to <[email protected]>."
58
59version="\
60GNU config.guess ($timestamp)
61
62Originally written by Per Bothner.
63Copyright 1992-2026 Free Software Foundation, Inc.
64
65This is free software; see the source for copying conditions.  There is NO
66warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE."
67
68help="
69Try '$me --help' for more information."
70
71# Parse command line
72while test $# -gt 0 ; do
73  case $1 in
74    --time-stamp | --time* | -t )
75       echo "$timestamp" ; exit ;;
76    --version | -v )
77       echo "$version" ; exit ;;
78    --help | --h* | -h )
79       echo "$usage"; exit ;;
80    -- )     # Stop option processing
81       shift; break ;;
82    - )	# Use stdin as input.
83       break ;;
84    -* )
85       echo "$me: invalid option $1$help" >&2
86       exit 1 ;;
87    * )
88       break ;;
89  esac
90done
91
92if test $# != 0; then
93  echo "$me: too many arguments$help" >&2
94  exit 1
95fi
96
97# Just in case it came from the environment.
98GUESS=
99
100# CC_FOR_BUILD -- compiler used by this script. Note that the use of a
101# compiler to aid in system detection is discouraged as it requires
102# temporary files to be created and, as you can see below, it is a
103# headache to deal with in a portable fashion.
104
105# Historically, 'CC_FOR_BUILD' used to be named 'HOST_CC'. We still
106# use 'HOST_CC' if defined, but it is deprecated.
107
108# Portable tmp directory creation inspired by the Autoconf team.
109
110tmp=
111# shellcheck disable=SC2172
112trap 'test -z "$tmp" || rm -fr "$tmp"' 0 1 2 13 15
113
114set_cc_for_build() {
115    # prevent multiple calls if $tmp is already set
116    test "$tmp" && return 0
117    : "${TMPDIR=/tmp}"
118    # shellcheck disable=SC2039,SC3028
119    { tmp=`(umask 077 && mktemp -d "$TMPDIR/cgXXXXXX") 2>/dev/null` && test -n "$tmp" && test -d "$tmp" ; } ||
120	{ test -n "$RANDOM" && tmp=$TMPDIR/cg$$-$RANDOM && (umask 077 && mkdir "$tmp" 2>/dev/null) ; } ||
121	{ tmp=$TMPDIR/cg-$$ && (umask 077 && mkdir "$tmp" 2>/dev/null) && echo "Warning: creating insecure temp directory" >&2 ; } ||
122	{ echo "$me: cannot create a temporary directory in $TMPDIR" >&2 ; exit 1 ; }
123    dummy=$tmp/dummy
124    case ${CC_FOR_BUILD-},${HOST_CC-},${CC-} in
125	,,)    echo "int x;" > "$dummy.c"
126	       for driver in cc gcc c17 c99 c89 ; do
127		   if ($driver -c -o "$dummy.o" "$dummy.c") >/dev/null 2>&1 ; then
128		       CC_FOR_BUILD=$driver
129		       break
130		   fi
131	       done
132	       if test x"$CC_FOR_BUILD" = x ; then
133		   CC_FOR_BUILD=no_compiler_found
134	       fi
135	       ;;
136	,,*)   CC_FOR_BUILD=$CC ;;
137	,*,*)  CC_FOR_BUILD=$HOST_CC ;;
138    esac
139}
140
141# This is needed to find uname on a Pyramid OSx when run in the BSD universe.
142# ([email protected] 1994-08-24)
143if test -f /.attbin/uname ; then
144	PATH=$PATH:/.attbin ; export PATH
145fi
146
147UNAME_MACHINE=`(uname -m) 2>/dev/null` || UNAME_MACHINE=unknown
148UNAME_RELEASE=`(uname -r) 2>/dev/null` || UNAME_RELEASE=unknown
149UNAME_SYSTEM=`(uname -s) 2>/dev/null` || UNAME_SYSTEM=unknown
150UNAME_VERSION=`(uname -v) 2>/dev/null` || UNAME_VERSION=unknown
151
152case $UNAME_SYSTEM in
153Ironclad|Linux|GNU|GNU/*)
154	LIBC=unknown
155
156	set_cc_for_build
157	cat <<-EOF > "$dummy.c"
158	#if defined(__ANDROID__)
159	LIBC=android
160	#else
161	#include <features.h>
162	#if defined(__UCLIBC__)
163	LIBC=uclibc
164	#elif defined(__dietlibc__)
165	LIBC=dietlibc
166	#elif defined(__GLIBC__)
167	LIBC=gnu
168	#elif defined(__LLVM_LIBC__)
169	LIBC=llvm
170	#elif defined(__mlibc__)
171	LIBC=mlibc
172	#else
173	#include <stdarg.h>
174	/* First heuristic to detect musl libc.  */
175	#ifdef __DEFINED_va_list
176	LIBC=musl
177	#endif
178	#endif
179	#endif
180	EOF
181	cc_set_libc=`$CC_FOR_BUILD -E "$dummy.c" 2>/dev/null | grep '^LIBC' | sed 's, ,,g'`
182	eval "$cc_set_libc"
183
184	# Second heuristic to detect musl libc.
185	if [ "$LIBC" = unknown ] &&
186	   command -v ldd >/dev/null &&
187	   ldd --version 2>&1 | grep -q ^musl; then
188		LIBC=musl
189	fi
190
191	# If the system lacks a compiler, then just pick glibc.
192	# We could probably try harder.
193	if [ "$LIBC" = unknown ]; then
194		LIBC=gnu
195	fi
196	;;
197esac
198
199# Note: order is significant - the case branches are not exclusive.
200
201case $UNAME_MACHINE:$UNAME_SYSTEM:$UNAME_RELEASE:$UNAME_VERSION in
202    *:NetBSD:*:*)
203	# NetBSD (nbsd) targets should (where applicable) match one or
204	# more of the tuples: *-*-netbsdelf*, *-*-netbsdaout*,
205	# *-*-netbsdecoff* and *-*-netbsd*.  For targets that recently
206	# switched to ELF, *-*-netbsd* would select the old
207	# object file format.  This provides both forward
208	# compatibility and a consistent mechanism for selecting the
209	# object file format.
210	#
211	# Note: NetBSD doesn't particularly care about the vendor
212	# portion of the name.  We always set it to "unknown".
213	UNAME_MACHINE_ARCH=`(uname -p 2>/dev/null || \
214	    /sbin/sysctl -n hw.machine_arch 2>/dev/null || \
215	    /usr/sbin/sysctl -n hw.machine_arch 2>/dev/null || \
216	    echo unknown)`
217	case $UNAME_MACHINE_ARCH in
218	    aarch64eb) machine=aarch64_be-unknown ;;
219	    armeb) machine=armeb-unknown ;;
220	    arm*) machine=arm-unknown ;;
221	    sh3el) machine=shl-unknown ;;
222	    sh3eb) machine=sh-unknown ;;
223	    sh5el) machine=sh5le-unknown ;;
224	    earmv*)
225		arch=`echo "$UNAME_MACHINE_ARCH" | sed -e 's,^e\(armv[0-9]\).*$,\1,'`
226		endian=`echo "$UNAME_MACHINE_ARCH" | sed -ne 's,^.*\(eb\)$,\1,p'`
227		machine=${arch}${endian}-unknown
228		;;
229	    *) machine=$UNAME_MACHINE_ARCH-unknown ;;
230	esac
231	# The Operating System including object format, if it has switched
232	# to ELF recently (or will in the future) and ABI.
233	case $UNAME_MACHINE_ARCH in
234	    earm*)
235		os=netbsdelf
236		;;
237	    arm*|i386|m68k|ns32k|sh3*|sparc|vax)
238		set_cc_for_build
239		if echo __ELF__ | $CC_FOR_BUILD -E - 2>/dev/null \
240			| grep -q __ELF__
241		then
242		    # Once all utilities can be ECOFF (netbsdecoff) or a.out (netbsdaout).
243		    # Return netbsd for either.  FIX?
244		    os=netbsd
245		else
246		    os=netbsdelf
247		fi
248		;;
249	    *)
250		os=netbsd