3 # Copyright (c) The Exim Maintainters 2022
4 # SPDX-License-Identifier: GPL-2.0-or-later
6 # Shell script to determine the operating system type. Some of the heuristics
7 # herein have accumulated over the years and may not strictly be needed now,
8 # but they are left in under the principle of "If it ain't broke, don't fix
11 # For some OS there are two variants: a full name, which is used for the
12 # build directory, and a generic name, which is used to identify the OS-
13 # specific scripts, and which can be the same for different versions of
14 # the OS. Solaris 2 is one such OS. The option -generic specifies the
15 # latter type of output.
17 # If EXIM_OSTYPE is set, use it. This allows a manual override.
19 case "$EXIM_OSTYPE" in ?*) os="$EXIM_OSTYPE";; esac
21 # Otherwise, try to get a value from the uname command. Use an explicit
22 # option just in case there are any systems where -s is not the default.
24 case "$os" in '') os=`uname -s`;; esac
26 # Identify Glibc systems under different names.
28 case "$os" in GNU) os=GNU;; esac
29 case "$os" in GNU/*|Linux) os=Linux;; esac
31 # It is believed that all systems respond to uname -s, but just in case
32 # there is one that doesn't, use the shell's $OSTYPE variable. It is known
33 # to be unhelpful for some systems (under IRIX is it "irix" and under BSDI
34 # 3.0 it may be "386BSD") but those systems respond to uname -s, so this
37 case "$os" in '') os="$OSTYPE";; esac
39 # Failed to find OS type.
43 echo "*** Failed to determine the operating system type." 1>&2
49 # Clean out gash characters
51 os=`echo $os | sed 's,[^-+_.a-zA-Z0-9],,g'`
53 # A value has been obtained for the os. Some massaging may be needed in
54 # some cases to get a uniform set of values. In earlier versions of this
55 # script, $OSTYPE was looked at before uname -s, and various shells set it
56 # to things that are subtly different. It is possible that some of this may
57 # no longer be needed.
67 freebsd*) os=FreeBSD;;
73 IRIX) version=`uname -r`
76 6.5) version=`uname -R | awk '{print $NF}'`
77 version=`echo $version | sed 's,[^-+_a-zA-Z0-9],,g'`
81 HI-OSF1-MJ) os=HI-OSF;;
89 openbsd*) os=OpenBSD;;
94 UnixWare) os=Unixware7;;
99 # In the case of SunOS we need to distinguish between SunOS4 and Solaris (aka
100 # SunOS5); in the case of BSDI we need to distinguish between versions 3 and 4;
101 # in the case of HP-UX we need to distinguish between version 9 and later.
104 SunOS) case `uname -r` in
109 BSDI) case `uname -r` in
111 4.2*) os="${os}4.2";;
115 HP-UX) case `uname -r` in
116 A.09*) os="${os}-9";;
120 # Need to distinguish Solaris from the version on the HAL (64bit sparc,
121 # CC=hcc -DV7). Also need to distinguish different versions of the OS
122 # for building different binaries.
125 SunOS5) case `uname -m` in
126 sun4H) os="${os}-hal";;
127 *) os="${os}-`uname -r`";;
131 # In the case of Linux we used to distinguish which libc was used so that
132 # the old libc5 was supported as well as the current glibc. This support
133 # was giving some people problems, so it was removed in June 2005, under
134 # the assumption that nobody would be using libc5 any more (it is over seven
137 # In the case of NetBSD we need to distinguish between a.out, ELF
138 # and COFF binary formats. However, a.out and COFF are the same
139 # for our purposes, so both of them are defined as "a.out".
140 # Todd Vierling of Wasabi Systems reported that NetBSD/sh3 (the
141 # only NetBSD port that uses COFF binary format) will switch to
144 NetBSD) if echo __ELF__ | ${CC-cc} -E - | grep -q __ELF__ ; then
152 # If a generic OS name is requested, some further massaging is needed
155 if [ "$1" = '-generic' ]; then
163 # OK, the script seems to have worked. Pass the value back.