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# serial 13
# Copyright (C) 2001, 2003-2004, 2006, 2009-2023 Free Software Foundation, Inc.
# This file is free software; the Free Software Foundation
# gives unlimited permission to copy and/or distribute it,
# with or without modifications, as long as this notice is preserved.
# Written by Paul Eggert.
dnl From Paul Eggert.
# Define HOST_OPERATING_SYSTEM to a name for the host operating system.
AC_DEFUN([gl_HOST_OS],
[
AC_REQUIRE([AC_CANONICAL_HOST])dnl
AC_CACHE_CHECK([host operating system],
[gl_cv_host_operating_system],
[[case $host_os in
# These operating system names do not use the default heuristic below.
# They are in reverse order, so that more-specific prefixes come first.
winnt*) os='Windows NT';;
vos*) os='VOS';;
sysv*) os='Unix System V';;
superux*) os='SUPER-UX';;
sunos*) os='SunOS';;
stop*) os='STOP';;
sco*) os='SCO Unix';;
riscos*) os='RISC OS';;
riscix*) os='RISCiX';;
qnx*) os='QNX';;
pw32*) os='PW32';;
ptx*) os='ptx';;
plan9*) os='Plan 9';;
osf*) os='Tru64';;
os2*) os='OS/2';;
openbsd*) os='OpenBSD';;
nsk*) os='NonStop Kernel';;
nonstopux*) os='NonStop-UX';;
netbsd*-gnu*) os='GNU/NetBSD';; # NetBSD kernel+libc, GNU userland
netbsd*) os='NetBSD';;
mirbsd*) os='MirBSD';;
midnightbsd*) os='MidnightBSD';;
knetbsd*-gnu) os='GNU/kNetBSD';; # NetBSD kernel, GNU libc+userland
kfreebsd*-gnu) os='GNU/kFreeBSD';; # FreeBSD kernel, GNU libc+userland
msdosdjgpp*) os='DJGPP';;
mpeix*) os='MPE/iX';;
mint*) os='MiNT';;
mingw* | windows*) os='MinGW';;
lynxos*) os='LynxOS';;
linux*) os='GNU/Linux';;
hpux*) os='HP-UX';;
hiux*) os='HI-UX';;
gnu*) os='GNU';;
freebsd*) os='FreeBSD';;
dgux*) os='DG/UX';;
dragonfly*) os='DragonFly BSD';;
bsdi*) os='BSD/OS';;
bsd*) os='BSD';;
beos*) os='BeOS';;
aux*) os='A/UX';;
atheos*) os='AtheOS';;
amigaos*) os='Amiga OS';;
aix*) os='AIX';;
# The default heuristic takes the initial alphabetic string
# from $host_os, but capitalizes its first letter.
[A-Za-z]*)
os=`
expr "X$host_os" : 'X\([A-Za-z]\)' | LC_ALL=C tr '[a-z]' '[A-Z]'
``
expr "X$host_os" : 'X.\([A-Za-z]*\)'
`
;;
# If $host_os does not start with an alphabetic string, use it unchanged.
*)
os=$host_os;;
esac
gl_cv_host_operating_system=$os]])
AC_DEFINE_UNQUOTED([HOST_OPERATING_SYSTEM],
"$gl_cv_host_operating_system",
[The host operating system.])
])
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