Pre-defined Operating System Macros

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Table of Content - Operating Systems

Table of Content - Operating Systems
AIX
AmigaOS
BeOS
BSD/OS
Cray UniCOS
DG/UX
DragonFly
DYNIX/ptx
FreeBSD
GNU Hurd
HI-UX/MPP
HP-UX
IRIX
Linux
LynxOS
MacOS
Microware OS-9
MINIX
MPE/iX
MSDOS
MS Windows
MS Windows CE
NetBSD
OpenBSD
OS/2
Pyramid DC/OS
QNX
Reliant UNIX
SCO OpenServer
Solaris
Symbian OS
Tru64 (OSF/1)
Ultrix
UnixWare
VMS
z/OS (OS/390)
BSD Environment
SVR4 Environment
Unix Environment
U/Win Environment
Wind/U Environment

AIX

Type Macro Description
Identification _AIX .
Version . See example
Identification __TOS_AIX__ Defined by xlC

Example

If _AIX is defined, then the following macros can be used to determine the version. Please note that the macros indicates the mentioned version or higher. For example, if _AIX43 is defined, then _AIX41 will also be defined.

AIX Macro
3.2.x _AIX3, _AIX32
4.1 _AIX41
4.3 _AIX43

Official site Google Directory Wikipedia

AmigaOS

Type Macro Description
Identification AMIGA .
Identification __amigaos__ Defined by GNU C

Official site Google Directory Wikipedia

BeOS

Type Macro
Identification __BEOS__

Official site Google Directory Wikipedia

BSD/OS

Type Macro
Identification __bsdi__

Wikipedia

Cray UniCOS

Type Macro Format Description
Identification _UNICOS . .
Version _UNICOS V V = Version

Official site Wikipedia

DG/UX

Type Macro
Identification DGUX
Identification __DGUX__
Identification __dgux__

Official site Wikipedia

DragonFly

Type Macro
Identification __DragonFly__

Official site Wikipedia

DYNIX/ptx

Type Macro
Identification _SEQUENT_
Identification sequent

Official site Wikipedia

FreeBSD

Type Macro Format Description
Identification __FreeBSD__ . .
Version BSD . .
Version __FreeBSD__ V V = Version
Version __FreeBSD_version ? Must be included from <osreldate.h>

Example

FreeBSD __FreeBSD__ __FreeBSD_version
1.x 1 .
2.0-RELEASE 2 119411
2.2-RELEASE 2 220000
3.0-RELEASE 3 300005
4.0-RELEASE 4 400017
4.5-RELEASE 4 450000

For more information see the FreeBSD porters handbook.

Official site Google Directory Wikipedia

GNU Hurd

Type Macro
Identification __GNU__

Official site Google Directory Wikipedia

HI-UX/MPP

Type Macro
Identification __hiuxmpp

Official site

HP-UX

Type Macro Description
Identification _hpux Defined by HP UPC
Identification hpux .
Identification __hpux .

Official site Google Directory Wikipedia

IRIX

Type Macro
Identification sgi
Identification __sgi

Official site Google Directory Wikipedia

Linux

Type Macro
Identification linux
Identification __linux

Official site Google Directory Wikipedia

LynxOS

Type Macro
Identification __Lynx__

Official site Google Directory Wikipedia

MacOS

Type Macro Description
Identification macintosh Mac OS 9
Identification Macintosh Mac OS 9
Identification __APPLE__ & __MACH__ Mac OS X

Defined by GNU C

Official site Google Directory Wikipedia

Microware OS-9

Type Macro Description
Identification __OS9000 Defined by Ultimate C/C++
Identification _OSK Defined by Ultimate C/C++

Official site Wikipedia

MINIX

Type Macro
Identification __minix

Official site Google Directory Wikipedia

MPE/iX

Type Macro
Identification mpeix
Identification __mpexl

Official site Wikipedia

MSDOS

Type Macro
Identification MSDOS
Identification __MSDOS__
Identification _MSDOS
Identification __DOS__

Google Directory Wikipedia

MS Windows

Type Macro Description
Identification _WIN32 Defined for both 32-bit and 64-bit environments
Identification _WIN64 Defined for 64-bit environments.
Identification __WIN32__ Defined by Borland C++
Identification __TOS_WIN__ Defined by xlC

Official site Google Directory Wikipedia

MS Windows CE

Type Macro Format Description
Identification _WIN32_WCE . Defined by Embedded Visual Studio C++
Version _WIN32_WCE VRR V = Version
R = Revision
Identification WIN32_PLATFORM_'P' . P = Platform
Version WIN32_PLATFORM_'P' V P = Platform
V = Version

Example

Version _WIN32_WCE
2.01 201
2.11 211
3.0 300
4.0 400
4.1 410
4.2 420
5.0 501

Platform Macro Value
H/PC 2000 WIN32_PLATFORM_HPC2000 .
H/PC Pro 2.11 WIN32_PLATFORM_HPCPRO 211
H/PC Pro 3.0 WIN32_PLATFORM_HPCPRO 300
Pocket PC WIN32_PLATFORM_PSPC 1
Pocket PC 2002 WIN32_PLATFORM_PSPC 310
Windows Mobile 2003 WIN32_PLATFORM_PSPC 400
Smartphone 2002 WIN32_PLATFORM_WFSP 100

Official site Google Directory Wikipedia

NetBSD

Type Macro Format Description
Identification __NetBSD__ . .
Version BSD . .
Version NetBSD'V'_'R' . V = Version
R = Revision

Must be included from <sys/param.h>
Version __NetBSD_Version VVRRAAPP00 VV = Version
RR = Revision
AA = Release
PP = Patch

From NetBSD 1.2D (?) until NetBSD 2.0H

Must be included from <sys/param.h>
Version __NetBSD_Version VVRR00PP00 VV = Version
RR = Revision
PP = Patch

From NetBSD 2.99.9

Must be included from <sys/param.h>

Example

NetBSD __NetBSD_Version__ Macro
0.8 . NetBSD0_8
0.9 . NetBSD0_9
1.0 . NetBSD1_0 = 1
1.0A . NetBSD1_0 = 2
1.2D 102040000 .
1.2.1 102000100 .

Official site Google Directory Wikipedia

OpenBSD

Type Macro Format Description
Identification __OpenBSD__ . .
Version BSD . .
Version OpenBSD'V'_'R' . V = Version
R = Revision

Must be included from <sys/param.h>

Example

OpenBSD Macro
3.1 OpenBSD3_1
3.9 OpenBSD3_9

Official site Google Directory Wikipedia

OS/2

Type Macro
Identification OS2
Identification _OS2
Identification __OS2__
Identification __TOS_OS2__

Official site Google Directory Wikipedia

Pyramid DC/OS

Type Macro
Identification pyr

QNX

Type Macro Format Description
Identification __QNX__ . QNX 4.x
Identification __QNXNTO__ . QNX 6.x
Version _NTO_VERSION VRR V = Version
RR = Revision

Only available when __QNXNTO__ is defined.

Must be included from <sys/neutrino.h>

Example

QNX _NTO_VERSION
6.2 620

Official site Google Directory Wikipedia

Reliant UNIX

Type Macro
Identification sinux

Official site

SCO OpenServer

Type Macro Description
Identification M_I386 Defined by GNU C
Identification M_XENIX Defined by GNU C
Identification _SCO_DS .

Official site Google Directory Wikipedia

Solaris

Type Macro Description
Identification sun .
Identification __sun .
Version __'System'_'Version' System = uname -s
Version = uname -r
Any illegal character is replaced by an underscore.

Defined by Sun Studio

Use the SVR4 macros to distinguish between Solaris and SunOS. 

#if defined(sun) || defined(__sun)
# if defined(__SVR4) || defined(__svr4__)
/* Solaris */
# else
/* SunOS */
# endif
#endif

Example

Solaris Macro
2.7 __SunOS_5_7
8 __SunOS_5_8

Official site Google Directory Wikipedia

Symbian OS

Type Macro
Identification __SYMBIAN32__

Official site Wikipedia

Tru64 (OSF/1)

Type Macro
Identification __osf__
Identification __osf

Official site Google Directory Wikipedia

Ultrix

Type Macro
Identification ultrix
Identification __ultrix
Identification __ultrix__
Identification unix & vax

Wikipedia

UnixWare

Type Macro
Identification sco
Identification _UNIXWARE7

Official site Google Directory Wikipedia

VMS

Type Macro Format Description
Identification VMS . .
Identification __VMS . .
Version __VMS_VER VVRREPPTT VV = Version
RR = Revision
E = Edit number
PP = Patch (01 = A, ... 26 = Z)
TT = Type (22 = official)

Example

VMS __VMS_VER
6.1 60100022
6.2 60200022
6.2-1I 60210922

Official site Google Directory Wikipedia

z/OS (OS/390)

Type Macro Description
Identification __MVS__ Host
Identification __HOS_MVS__ Host
Identification __TOS_MVS__ Target

Official site Google Directory Wikipedia

BSD Environment

Type Macro Format Description
Identification __FreeBSD__
__NetBSD__
__OpenBSD__
__bsdi__
__DragonFly__		 . .
Version BSD YYYYMM YYYY = Year
MM = Month

Must be included from <sys/param.h>
Version BSD4_2
BSD4_3
BSD4_4		 . Must be included from <sys/param.h>
Identification _SYSTYPE_BSD . Defined by DEC C

Example

Version BSD Macro
4.3 Net2 199103 .
4.4 199306 BSD4_4
4.4BSD-Lite2 199506 .

Wikipedia

SVR4 Environment

Type Macro Description
Identification __sysv__ .
Identification __SVR4 .
Identification __svr4__ .
Identification _SYSTYPE_SVR4 Defined on IRIX

Official site Wikipedia

Unix Environment

Type Macro
Identification __unix__
Identification __unix

Please note that not all compilers defines these macros, e.g. the xlC or the DEC C/C++ compiler, so it may be better to use the POSIX or X/Open standard macros instead.

Google Directory Wikipedia

U/Win Environment

Type Macro
Identification _UWIN

Official site

Wind/U Environment

Type Macro
Identification _WINDU_SOURCE

Example

Wind/U _WINDU_SOURCE
3.1.2 0x030102

Official site

Copyright © 2002-2006 Bjørn Reese

Permission to use, copy, modify, and distribute this document for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies.

THIS DOCUMENT IS PROVIDED ``AS IS'' AND WITHOUT ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, WITHOUT LIMITATION, THE IMPLIED WARRANTIES OF MERCHANTIBILITY AND FITNESS FOR A PARTICULAR PURPOSE. THE AUTHORS AND CONTRIBUTORS ACCEPT NO RESPONSIBILITY IN ANY CONCEIVABLE MANNER.

$Id: preos.muse,v 1.5 2007/02/18 11:01:09 breese Exp $