C/C++预定义编译宏

Pre-defined C/C++ Compiler Macros

https://sourceforge.net/p/predef/wiki/Home/

The macros are found here:

• Standards
• Compilers
• Libraries
• Operating systems
• Architectures

General guidelines are found here:

• Version normalization
• Feature macros
• Endianness

Introduction

C and C++ compilers automatically define certain macros that can be used to check for compiler or operating system features. This is useful when writing portable software.

These pages lists various pre-defined compiler macros that can be used to identify standards, compilers, operating systems, hardware architectures, and even basic run-time libraries at compile-time.

For example, if we want to use a generic or opaque pointer type, we use void pointers. However, ancient K&R compilers (from the time before the first ANSI C standard) do not support void pointers. Instead we can define our own type:

#if defined(__STDC__) || defined(__cplusplus) || defined(_MSC_EXTENSIONS)

typedef void * t_pointer;

#else

typedef char * t_pointer;

#endif

Another example, Microsoft Visual C++ version 4.2 added a pragma to reduce compilation times by only including a file once (if _MSC_VER is not defined then it will evaluate to 0 (zero) — however, some compilers may complain about an undefined macro)

#if defined(_MSC_VER) && (_MSC_VER >= 1020)

#pragma once

#endif

The macros contained in these pages have been obtained through vendor documentation, the defines script, contributors, and third-party source code. No guarantee about the correctness of the macros is given.

An often-used alternative is Autoconf, which is a more powerful tool to examine various types of features, including compilation options. However, Autoconf is fairly Unix-centric, and requires a Unix layer on other platforms (e.g. Cygwin on Windows). Other alternatives are Buildtool, CMake, SCons, PMK, Jam, Ant, and Bakefile.

Contributors

Bjorn Reese, Daniel Stenberg, Greg Roelofs, Steven G. Johnson, Wlodzimierz ABX Skiba, Marc Finet, Philip Newton, Mitchell Charity, Christian Klutz, Seo Sanghyeon, Chris Adami, Geoff Clare, Dan Fandrich, Mike Gorchak, Yuri D'Elia, Gynvael Coldwind, Alain Tauch, Vadim Zeitlin, Steve White, Thomas David Rivers, Tom Honermann, Martin Mitas, Dinesh Chhadwa, Erik Faye-Lund, Leo Davis, Paul Hsieh, Roland Schwarz, Darko Kolakovic, Andy Buonviri, Ming Kin Lai, Kent Johnson, Helmut Bauer, Oliver Schneider, Ron Pimblett, Jose Luis Rodriguez Garcia, Jeroen Ruigrok van der Werven, Uffe Jakobsen, Bryan Ashby, Bruno Haible, Artur Bac, Terry Schwarz, Leo Davis, Markus Duft, William Dang, Paul Green, Ruben Van Boxem, Pau Garcia i Quiles, Mikulas Patocka, Leo Davis, Mark Ferry, Holger Machens, Simon Watts, Paul Hargrove, Hans-Christoph Steiner, Gerald Combs, Denys Bulant, Massimo Morara, Jeremy Bennett, Guillem Jover, Riku Voipio, Jacques Pelletier, Mark Jarvin, Georg Sauthoff, Scot Jenkins, Grzegorz Brzęczyszczykiewicz, John Dallman, Gianmichele Toglia, Robbie Groenewoudt, Andreas Mohr, Алексей Пюрецкий, Sverre Hvammen Johansen, Stefan Tauner, Daniel Garcia, Ozkan Sezer, Dean Saridakis, Frank Long, Kevin Adler.

Top

Language Standards

Language standards requires the existence of pre-defined macros.

Name	Macro	Standard
C89	__STDC__	ANSI X3.159-1989
C90	__STDC__	ISO/IEC 9899:1990
C94	__STDC_VERSION__ = 199409L	ISO/IEC 9899-1:1994
C99	__STDC_VERSION__ = 199901L	ISO/IEC 9899:1999
C11	__STDC_VERSION__ = 201112L	ISO/IEC 9899:2011
C++98	__cplusplus = 199711L	ISO/IEC 14882:1998
C++11	__cplusplus = 201103L	ISO/IEC 14882:2011
C++14	__cplusplus = 201402L	ISO/IEC 14882:2014
C++/CLI	__cplusplus_cli = 200406L	ECMA-372
DSP-C		ISO/IEC JTC1/SC22 WG14/N854
EC++	__embedded_cplusplus	Embedded C++

Example: C Standards

#if defined(__STDC__)

# define PREDEF_STANDARD_C_1989

# if defined(__STDC_VERSION__)

#  if (__STDC_VERSION__ >= 199409L)

#   define PREDEF_STANDARD_C_1994

#  endif

#  if (__STDC_VERSION__ >= 199901L)

#   define PREDEF_STANDARD_C_1999

#  endif

# endif

#endif

Notice that not all compliant compilers provides the correct pre-defined macros. For example, Microsoft Visual C++ does not define __STDC__, or Sun Workshop 4.2 supports C94 without setting __STDC_VERSION__ to the proper value. Extra checks for such compilers must be added.

Notice that some compilers, such as the HP aC++, use the value 199707L to indicate the C++98 standard. This value was used in an earlier proposal of the C++98 standard.

Example: Pre-C89

In continuation of the above example, pre-C89 compilers do not recognize certain keywords. Let the preprocessor remove those keywords for those compilers.

#if !defined(PREDEF_STANDARD_C_1989) && !defined(__cplusplus)

# define const

# define volatile

#endif

Unix Standards

There are several related Unix standards, such as POSIX, X/Open, and LSB.

Unix standards require the existence macros in the <unistd.h> header file.

Name	Macro	Standard
POSIX.1-1988	_POSIX_VERSION = 198808L
POSIX.1-1990	_POSIX_VERSION = 199009L	ISO/IEC 9945-1:1990
POSIX.2	_POSIX2_C_VERSION = 199209L	ISO/IEC 9945-2:1993
POSIX.1b-1993	_POSIX_VERSION = 199309L	IEEE 1003.1b-1993
POSIX.1-1996	_POSIX_VERSION = 199506L	IEEE 1003.1-1996
POSIX.1-2001	_POSIX_VERSION = 200112L	IEEE 1003.1-2001
POSIX.1-2008	_POSIX_VERSION = 200809L	IEEE 1003.1-2008
XPG3	_XOPEN_VERSION = 3	X/Open Portability Guide 3 (1989)
XPG4	_XOPEN_VERSION = 4	X/Open Portability Guide 4 (1992)
SUS	_XOPEN_VERSION = 4 && _XOPEN_UNIX	X/Open Single UNIX Specification (UNIX95)
SUSv2	_XOPEN_VERSION = 500	X/Open Single UNIX Specification, Version 2 (UNIX98)
SUSv3	_XOPEN_VERSION = 600	Open Group Single UNIX Specification, Version 3 (UNIX03)
SUSv4	_XOPEN_VERSION = 700	Open Group Single UNIX Specification, Version 4
LSB	__LSB_VERSION__ = VR	Linux Standards Base V = Version R = Revision

Example: Unix Standards

The following examples assumes the definition of these macros.

#if defined(unix) || defined(__unix__) || defined(__unix)

# define PREDEF_PLATFORM_UNIX

#endif

#if defined(PREDEF_PLATFORM_UNIX)

# include <unistd.h>

# if defined(_XOPEN_VERSION)

#  if (_XOPEN_VERSION >= 3)

#   define PREDEF_STANDARD_XOPEN_1989

#  endif

#  if (_XOPEN_VERSION >= 4)

#   define PREDEF_STANDARD_XOPEN_1992

#  endif

#  if (_XOPEN_VERSION >= 4) && defined(_XOPEN_UNIX)

#   define PREDEF_STANDARD_XOPEN_1995

#  endif

#  if (_XOPEN_VERSION >= 500)

#   define PREDEF_STANDARD_XOPEN_1998

#  endif

#  if (_XOPEN_VERSION >= 600)

#   define PREDEF_STANDARD_XOPEN_2003

#  endif

#  if (_XOPEN_VERSION >= 700)

#   define PREDEF_STANDARD_XOPEN_2008

#  endif

# endif

#endif

Notice that not all compliant compilers provides the correct pre-defined macros. For example, IBM xlC supports Unix without setting any of the __unix__ macros. Extra checks for such compilers must be added.

Top

Compilers  

ACC

Type	Macro
Identification	_ACC_

Altium MicroBlaze C

Type	Macro	Format	Description
Identification	__CMB__
Version	__VERSION__	VRRR	V=Version RRR=Revision
Version	__REVISION__	P	P=Patch
Version	__BUILD__	VRRRPPP	Build number

Example

Altium MicroBlaze C	__VERSION__	__REVISION__	__BUILD__
1.0r2	1000	2
1.22.2			1022001

Altium C-to-Hardware

Type	Macro	Format	Description
Identification	__CHC__
Version	__VERSION__	VRRR	V=Version RRR=Revision
Version	__REVISION__	P	P=Patch Beta releases set this to -1
Version	__BUILD__	VRRRPPP	Build number

Example

Altium C-to-Hardware	__VERSION__	__REVISION__	__BUILD__
2.1r1	2001	1
1.22.2			1022001

Amsterdam Compiler Kit

Type	Macro
Identification	__ACK__

ARM Compiler

Type	Macro	Format	Description
Identification	__CC_ARM
Version	__ARMCC_VERSION	VRPBBB	V = Version R = Revision P = Patch BBB = Build

Notice that the __ARMCC_VERSION macro is also used as version indicator for Norcroft C, but that the format is different.

Example

Realview C	__ARMCC_VERSION
3.0	300503

Aztec C

Type	Macro	Format	Description
Identification	AZTEC_C __AZTEC_C__
Version	__VERSION	VRR	V = Version RR = Revision

Example

Aztec C	__VERSION
5.20	520

Borland C++

Type	Macro	Format
Identification	__BORLANDC__
Version	__BORLANDC__	?
Identification	__CODEGEARC__
Version	__CODEGEARC__	From C++ Builder 2006

Example

Borland C++	C++ Builder	__BORLANDC__	__CODEGEARC__
2.0		0x200
3.0		0x400
3.1		0x410
4.0		0x452
5.0		0x500
5.02	1.0	0x520
	3.0	0x530
	4.0	0x540
5.5	5.0	0x550
5.51		0x551
5.6.4		0x562
	2006	0x570	0x570
	2007	0x590	0x590
	2009	0x613	0x613
	2010	0x621	0x621
	XE	0x630	0x630
	XE2	0x640	0x640
	XE3	0x650	0x650
	XE4	0x660	0x660

CC65

Type	Macro	Format	Description
Identification	__CC65__
Version	__CC65__	0xVRP	V = Version R = Revision P = Patch

Example

Version	__CC65__
2.10.1	0x2A1

Clang

Type	Macro	Format
Identification	__clang__
Version	__clang_major__	Version
Version	__clang_minor__	Revision
Version	__clang_patchlevel__	Patch

Notice that clang also defines the GNU C version macros, but you should use the clang feature checking macros to detect the availability of various features.

The values of the __clang_major__, __clang_minor__, and __clang_patchlevel__ macros are not consistent across distributions of the Clang compiler. For example, the Clang 3.1 distribution available at http://clang.llvm.org defines __clang_major__ and __clang_minor__ as 3 and 1 respectively. The version of Clang distributed with Apple XCode 4.4 is branded as "Apple Clang 4.0" and derives from the open source Clang 3.1 distribution, but defines these macros with the values 4 and 0 respectively. Apple's Clang distribution can be identified by the presence of the __apple_build_version__macro.

Comeau C++

Type	Macro	Format	Description
Identification	__COMO__
Version	__COMO_VERSION__	VRR	V = Version RR = Revision

Example

Comeau C++	__COMO_VERSION__
2.3	230

Compaq C/C++

Type	Macro	Format	Description
Identification	__DECC		C compiler
Version	__DECC_VER	VVRRTPPPP	VV = Version RR = Revision T = Type (9 = official) PPPP = Patch
Identification	__DECCXX		C++ compiler
Version	__DECCXX_VER	As __DECC_VER
Identification	__VAXC		Obsolete
Identification	VAXC		Obsolete

Example

Compaq C/C++	__DECC_VER
6.0-001	60090001

Convex C

Type	Macro
Identification	__convexc__

CompCert

Type	Macro
Identification	__COMPCERT__

Coverity C/C++ Static Analyzer

Type	Macro
Identification	__COVERITY__

Cray C

Type	Macro	Description
Identification	_CRAYC
Version	_RELEASE	Version
Version	_RELEASE_MINOR	Revision

Diab C/C++

Type	Macro	Format	Description
Identification	__DCC__	1
Version	__VERSION_NUMBER__	VRPP	V = Version R = Revision PP = Patch

Example

Diab C/C++	__VERSION_NUMBER__
4.4g	4426

DICE C

Type	Macro
Identification	_DICE

Digital Mars

Type	Macro	Format	Description
Identification	__DMC__
Version	__DMC__	0xVRP	V = Version R = Revision P = Patch

Example

Digital Mars	__DMC__
7.0	0x700
7.2	0x720
8.0	0x800

Dignus Systems/C++

Type	Macro	Format	Description
Identification	__SYSC__
Version	__SYSC_VER__	VRRPP	V = Version RR = Revision PP = Patch

Example

Systems/C	__SYSC_VER__
1.80.32	18032

DJGPP

Type	Macro	Description
Identification	__DJGPP__
Version	__DJGPP__	Version
Version	__DJGPP_MINOR__	Revision
Identification	__GO32__	Defined by DJGPP 1.x

Example

DJGPP	__DJGPP__	__DJGPP_MINOR__
2.01	2	1

EDG C++ Frontend

Type	Macro	Format	Description
Identification	__EDG__
Version	__EDG_VERSION__	VRR	V = Version RR = Revision

Example

EDG C++	__EDG_VERSION__
2.30	230
2.45	245

EKOPath

Type	Macro	Description
Identification	__PATHCC__
Version	__PATHCC__	Version
Version	__PATHCC_MINOR__	Revision
Version	__PATHCC_PATCHLEVEL__	Patch

Example

EKOPath	__PATHCC__	__PATHCC_MINOR__	__PATHCC_PATCHLEVEL__
2.0	2	0	0

Fujitsu C++

Type	Macro
Identification	__FCC_VERSION

GCC C/C++

Type	Macro	Description
Identification	__GNUC__
Version	__GNUC__	Version
Version	__GNUC_MINOR__	Revision
Version	__GNUC_PATCHLEVEL__	Patch (introduced in version 3.0)

Notice that the meaning of the __GNUC__ macro has changed subtly over the years, from identifying the GNU C/C++ compiler to identifying any compiler that implements the GNU compiler extensions (see the Feature request - a macro defined for GCC discussion for further information). For example, the Intel C++ on Linux also defines these macros from version 8.1 (see the Intel C++ Compiler 8.1 for Linux Release Notes and Intel Compilers for Linux: Compatibility with GNU Compilers.)

Example

GNU C/C++	__GNUC__	__GNUC_MINOR__	__GNUC_PATCHLEVEL__
2.7.x	2	7	N/A
3.0.2	3	0	2

Alternative Version

If you prefer a single version macro, you can define the following yourself.

#if defined(__GNUC__)

# if defined(__GNUC_PATCHLEVEL__)

#  define __GNUC_VERSION__ (__GNUC__ * 10000 

                            + __GNUC_MINOR__ * 100 

                            + __GNUC_PATCHLEVEL__)

# else

#  define __GNUC_VERSION__ (__GNUC__ * 10000 

                            + __GNUC_MINOR__ * 100)

# endif

#endif

The format of this new macro is:

Type	Macro	Format	Description
Version	__GNUC_VERSION__	VVRRPP	VV = Version RR = Revision PP = Patch

Example of Alternative Version

GNU C/C++	__GNUC_VERSION__
2.7.x	20700
3.0.2	30002

Green Hill C/C++

Type	Macro	Format	Description
Identification	__ghs__
Version	__GHS_VERSION_NUMBER__	VRP	V = Version R = Revision P = Patch
Version	__GHS_REVISION_DATE__	Epoch time

Example

Green Hill C/C++	__GHS_VERSION_NUMBER__
4.2.1	421

HP ANSI C

Type	Macro
Identification	__HP_cc

HP aC++

Type	Macro	Format	Description
Identification	__HP_aCC
Version	__HP_aCC	1	From version A.01.15 (and A.03.13)
Version	__HP_aCC	VVRRPP	VV = Version RR = Revision PP = Patch From version A.01.21 (and A.03.25)

Example

HP aCC	__HP_aCC
A.01.21	12100

IAR C/C++

Type	Macro	Format	Description
Identification	__IAR_SYSTEMS_ICC__
Version	__VER__	VRR	V = Version RR = Revision

Example

IAR C/C++	__VER__
3.34	334

IBM XL C/C++

Type	Macro	Format	Description
Identification	__xlc__
Identification	__xlC__
Version	__xlC__	0xVVRR	VV = Version RR = Revision
Version	__xlC_ver__	0x0000PPBB	PP = Patch BB = Build
Identification	__IBMC__		From ?
Identification	__IBMCPP__		From ?
Version	__IBMC__ __IBMCPP__	VRP	V = Version R = Revision P = Patch

Notice that the z/OS C/C++ compiler also defines __IBMC__ and __IBMCPP__ macros, but with a different syntax. See the entry on the z/OS C/C++ compiler below for further information.

Example

IBM XL C/C++	__xlC__	__xlC_ver__
3.1	0x0301
4.5	0x0405
5.0	0x0500
12.01.0000.0004	0x0C01	0x00000004

IBM z/OS C/C++

This is the XL C/C++ compiler for mainframes (e.g. z/OS). The entry on XL C/C++ has been split into two for clarity.

Type	Macro	Format	Description
Identification	__IBMC__
Identification	__IBMCPP__
Version	__IBMC__ __IBMCPP__	NVRRM	N = Product (0 = C/370, 1 = MVS, 2 = OS/390, 4 = z/OS) V = Version RR = Revision P = Patch Defined for z/OS XL C/C++
Version	__COMPILER_VER__	0xNVRRPPPP	N = Product (see above) V = Version RR = Revision PPPP = Patch Defined for z/OS XL C/C++

Notice that XL C/C++ also defines __IBMC__ and __IBMCPP__ macros, but with a different syntax. You can use __xlC__ (only defined for XL C/C++) or __COMPILER_VER__ (only defined for z/OS C/C++) to distinguish between the two. Alternatively, the macro identifying z/OS (__MVS__) can be used to distinguish between them.

#if defined(__IBMC__) || defined(__IBMCPP__)

# if defined(__COMPILER_VER__)

/* z/OS C/C++ so __IBMC__ is defined as NVRRM */

# else

/* XL C/C++ so __IBMC__ is defined as VRP */

# endif

#endif

Example

IBM z/OS XL C/C++	__IBMC__	__COMPILER_VER__
1.7	41070	0x41070000
1.13	41130	0x410D0000

ImageCraft C

Type	Macro
Identification	__IMAGECRAFT__

Intel C/C++

Type	Macro	Format	Description
Identification	__INTEL_COMPILER
Identification	__ICC		Obsolete
Identification	__ECC		Obsolete
Identification	__ICL
Version	__INTEL_COMPILER	VRP	V = Version R = Revision P = Patch
Version	__INTEL_COMPILER_BUILD_DATE	YYYYMMDD	YYYY = Year MM = Month DD = Day

Example

Intel C/C++	__INTEL_COMPILER	__INTEL_COMPILER_BUILD_DATE
5.0	500
6.0	600
8.0	800
9.0	900	20060222

KAI C++

Type	Macro	Format	Description
Identification	__KCC
Version	__KCC_VERSION	0xVRPP	V = Version R = Revision PP = Patch (a = 01, b = 02, ...)

Example

KAI C++	__KCC_VERSION
4.0d	4004

KEIL CARM

Type	Macro	Format	Description
Identification	__CA__
Identification	__KEIL__
Version	__CA__	VRR	V = Version RR = Revision

Example

Keil CARM	__CA__
1.01	101

KEIL C166

Type	Macro	Format	Description
Identification	__C166__
Version	__C166__	VRR	V = Version RR = Revision

Example

Keil C166	__C166__
5.01	501

KEIL C51

Type	Macro	Format	Description
Identification	__C51__
Identification	__CX51__
Version	__C51__	VRR	V = Version RR = Revision

Example

Keil C51	__C51__
7.01	701

LCC

Type	Macro
Identification	__LCC__

LLVM

Type	Macro
Identification	__llvm__

MetaWare High C/C++

Type	Macro
Identification	__HIGHC__

Metrowerks CodeWarrior

Type	Macro	Format	Description
Identification	__MWERKS__
Identification	__CWCC__		From 4.2.0
Version	__MWERKS__	1	Until CodeWarrior 7
Version	__MWERKS__	0xVRPP	V = Version R = Revision PP = Patch From CodeWarrior 7
Version	__CWCC__	0xVRPP	V = Version R = Revision PP = Patch From 4.2.0

Example

Metrowerks C/C++	__MWERKS__	__CWCC__
2.0	0x2000
2.2	0x2200
4.2.0	0x4200	0x4200

Microsoft Visual C++

Type	Macro	Format	Description
Identification	_MSC_VER
Version	_MSC_VER	VVRR	VV = Version RR = Revision
Version	_MSC_FULL_VER	VVRRPPPP	VV = Version RR = Revision PPPP = Patch From Visual C++ 6.0 Processor Pack
Version	_MSC_FULL_VER	VVRRPPPPP	VV = Version RR = Revision PPPPP = Patch From Visual C++ 8.0
Version	_MSC_BUILD	B	B = Build number From Visual C++ 9.0

Example

Visual C++ 1 2	_MSC_VER	_MSC_FULL_VER
1.0	800
3.0	900
4.0	1000
4.2	1020
5.0	1100
6.0	1200
6.0 SP6	1200	12008804
7.0	1300	13009466
7.1 (2003)	1310	13103077
8.0 (2005)	1400	140050727
9.0 (2008)	1500	150021022
9.0 SP1	1500	150030729
10.0 (2010)	1600	160030319
10.0 (2010) SP1	1600	160040219
11.0 (2012)	1700	170050727
12.0 (2013)	1800	180021005
14.0 (2015)	1900	190023026
14.0 (2015 Update 1)	1900	190023506
14.0 (2015 Update 2)	1900	190023918
14.0 (2015 Update 3)	1900	190024210
15.0 (2017)	1910	191025017

Microtec C/C++

Type	Macro
Identification	_MRI

Microway NDP C

Type	Macro
Identification	__NDPC__ __NDPX__

MinGW and MinGW-w64

MinGW (formerly known as MinGW32) is a toolchain for creating 32 Bit Windows executables. The MinGW-w64 projects offers toolchains for creating 32 Bit and 64 Bit Windows executables. The following table shows which macros are defined by each toolchain:

Type	Macro	Description	MinGW32	MinGW-w64 32 Bit	MinGW-w64 64 Bit
Identification	__MINGW32__		defined	defined	defined
Version	__MINGW32_MAJOR_VERSION	Version	defined	defined	defined
Version	__MINGW32_MINOR_VERSION	Revision	defined	defined	defined
Identification	__MINGW64__		-	-	defined
Version	__MINGW64_VERSION_MAJOR	Version	-	defined	defined
Version	__MINGW64_VERSION_MINOR	Revision	-	defined	defined

Notice that __MINGW32_MAJOR_VERSION, __MINGW32_MINOR_VERSION, __MINGW64_VERSION_MAJOR, and __MINGW64_VERSION_MINOR
are only defined if appropriate headers are included. Appropriate headers are 
<stdlib.h>, <stdio.h>, <windows.h>, <windef.h>, and probably more.

Examples

__MINGW32_MAJOR_VERSION	__MINGW32_MINOR_VERSION	__MINGW64_VERSION_MAJOR	__MINGW64_VERSION_MINOR	Description
2	4			MinGW32 2.4
3	20			MinGW32 3.20
3	11	2	0	MinGW-w64 2.0

MIPSpro

Type	Macro	Format	Description
Identification	__sgi
Identification	sgi
Version	_COMPILER_VERSION	VRP	V = Version R = Revision P = Patch Until ?
Version	_SGI_COMPILER_VERSION	VRP	V = Version R = Revision P = Patch From ?

Example

MIPSpro	_COMPILER_VERSION	_SGI_COMPILER_VERSION
6.0.2	602
7.2.1	721
7.4.4		744

Miracle C

Type	Macro
Identification	MIRACLE

MPW C++

Type	Macro	Format	Description
Identification	__MRC__
Identification	MPW_C
Identification	MPW_CPLUS
Version	__MRC__	0xVVRR	VV = Version RR = Revision

Example

MPW C++	__MRC__
5.0	0x500

Norcroft C

Type	Macro	Format	Description
Identification	__CC_NORCROFT
Version	__ARMCC_VERSION	V.R	V = Version R = Revision

Notice that __ARMCC_VERSION is assigned a floating-point number, so it cannot be used by the preprocessor to compare versions.

Example

Norcroft C	__ARMCC_VERSION
4.69	4.69
4.90	4.90

NWCC

Type	Macro
Identification	__NWCC__

Open64

Type	Macro	Format	Description
Identification	__OPEN64__		Contains the full version as a string
Identification	__OPENCC__
Version	__OPENCC__	V	V = Version
Version	__OPENCC_MINOR__	R	R = Revision
Version	__OPENCC_PATCHLEVEL__	P.B	P = Patch B = Build

Notice that __OPENCC_PATCHLEVEL__ can be a floating-point number (e.g. 5.2 for Open64 version 4.2.5.2) so it cannot be used by the preprocessor to compare patch-levels.

Oracle Pro*C Precompiler

Type	Macro
Identification	ORA_PROC

Oracle Solaris Studio

Type	Macro	Format	Description
Identification	__SUNPRO_C		C compiler
Version	__SUNPRO_C	0xVRP	V = Version R = Revision P = Patch Until version 5.9
Version	__SUNPRO_C	0xVRRP	V = Version RR = Revision P = Patch From later releases
Identification	__SUNPRO_CC		C++ compiler
Version	__SUNPRO_CC	As __SUNPRO_C

Example

Compiler version	Solaris Studio	__SUNPRO_C
4.2	4.2	0x420
5.0	5.0	0x500
5.2	6.1	0x520
5.3	6.2	0x530
5.4	7	0x540
5.5	8	0x550
5.6	9	0x560
5.7	10	0x570
5.8	11	0x580
5.9	12	0x590
5.10	12.1	0x5100
5.11	12.2	0x5110
5.12	12.3	0x5120

The name of Oracle Solaris Studio has changed over the years (e.g. Sun Studio, Sun Workshop, Forte Developer) but we do not make this distinction in the table above.

Pacific C

Type	Macro
Identification	__PACIFIC__

Palm C/C++

Type	Macro	Format	Description
Identification	_PACC_VER
Version	_PACC_VER	0xVRRPPBBB	V = Version RR = Revision PP = Patch BBB = Build

Example

Palm C/C++	_PACC_VER
1.0.0.13	0x1000000D

Pelles C

Type	Macro	Format	Description
Identification	__POCC__
Version	__POCC__	VRR	V = Version RR = Revision

Example

Pelles C	__POCC__
3.00	300

Portland Group C/C++

Type	Macro	Description
Identification	__PGI
Version	__PGIC__	Version
Version	__PGIC_MINOR__	Revision
Version	__PGIC_PATCHLEVEL__	Patch

Example

PGI C/C++	__PGIC__	__PGIC_MINOR__	__PGIC_PATCHLEVEL__
7.0.1	7	0	1
11.9	11	9	0

Renesas C/C++

Type	Macro	Format	Description
Identification	__RENESAS__
Identification	__HITACHI__
Version	__RENESAS_VERSION__	0xVVRR	V = Version R = Revision P = Patch
Version	__RENESAS_VERSION__	0xVVRRPP00	From ?
Version	__HITACHI_VERSION__	0xVVRR	As above

Example

Renesas C/C++	__HITACHI_VERSION__	__RENESAS_VERSION__
5.1C	0x0501
8.0	0x8000	0x8000
1.00.00		0x01000000

SAS/C

Type	Macro	Format	Description
Identification	SASC
Identification	__SASC
Identification	__SASC__
Version	__VERSION__		Until ?
Version	__REVISION__		Until ?
Version	__SASC__	VRR	V = Version RR = Revision From ?

Example

SAS/C	__SASC__	__VERSION__	__REVISION__
5.10		5	10
6.50	650

SCO OpenServer

Type	Macro
Identification	_SCO_DS

Small Device C Compiler

Type	Macro	Format	Description
Identification	SDCC
Version	SDCC	VRP	V = Version R = Revision P = Patch

Example

SDCC Version	SDCC Macro
2.5.6	256

SN Compiler

Type	Macro
Identification	__SNC__

Stratus VOS C

Type	Macro	Description
Identification	__VOSC__
Version	__VOSC__	0 = K&R compiler 1 = ANSI C compiler

Symantec C++

Type	Macro	Format	Description
Identification	__SC__
Version	__SC__	0xVVRR	VV = Version RR = Revision

TenDRA C/C++

Type	Macro
Identification	__TenDRA__

Texas Instruments C/C++ Compiler

Type	Macro	Format	Description
Identification	__TI_COMPILER_VERSION__
Identification	_TMS320C6X		All C6000 compilers
Version	__TI_COMPILER_VERSION__	VVVRRRPPP	VVV = Version RRR = Revision PPP = Patch

Example

TI C/C++	__TI_COMPILER_VERSION__
4.9.1	4009001
7.3.1	7003001

THINK C

Type	Macro	Description
Version	THINKC3	Version 3.x
Version	THINKC4	Version 4.x

Tiny C

Type	Macro
Identification	__TINYC__

Turbo C/C++

Type	Macro	Format	Description
Identification	__TURBOC__
Version	__TURBOC__	0xVVRR	VV = Version RR = Revision This pattern does not apply to the values between 0x295 and 0x400.

Example

Turbo C	Turbo C++	__TURBOC__
2.01		0x201
	1.00	0x295
	1.01	0x296
	2.00	0x297

Ultimate C/C++

Type	Macro	Description
Identification	_UCC
Version	_MAJOR_REV = V _MINOR_REV = R	V = Version R = Revision

Example

Ultimate C/C++	_MAJOR_REV	_MINOR_REV
2.1	2	1

USL C

Type	Macro	Format	Description
Identification	__USLC__
Version	__SCO_VERSION__	VRRYYYYMM	V = Version RR = Revision YYYY = Year MM = Month

Example

USL C	__SCO_VERSION__	Description
3.2	302199801
3.4	304200805	UnixWare 7.1.4 UDK C++ (CC)
4.2	402200805	UnixWare 7.1.4 UDK C (cc)

VBCC

Type	Macro
Identification	__VBCC__

Watcom C++

Type	Macro	Format	Description
Identification	__WATCOMC__
Version	__WATCOMC__	VVRR	VV = Version RR = Revision

Notice that Watcom C++ became Open Watcom C++ after version 11.0, and the official version numbering (but not the version macro) was restated at version 1.0.

Example

Watcom C++	Open Watcom C++	__WATCOMC__
10.5		1050
11.0		1100
	1.0	1200
	1.7	1270

Zortech C++

Type	Macro	Format	Description
Identification	__ZTC__
Version	__ZTC__	0xVRP	V = Version R = Revision P = Patch

---

Top

Standard C Libraries

Bionic libc

The following macro is defined in the <sys/cdefs.h> header file. It may be best to include it via the <sys/types.h> header file, which is required by POSIX.

Type	Macro
Idenfication	__BIONIC__

GNU glibc

The following macros have to be included from the <features.h> header file.

Type	Macro	Description
Version	__GNU_LIBRARY__ __GNU_LIBRARY_MINOR__	Until version 5
Version	__GLIBC__ __GLIBC_MINOR__	From version 6

Notice that the <features.h> header file does not exist on all platforms, so it cannot be included without further ado. However, since it is included by other GNU glibc header files, a better way to obtain the above-mentioned macros is to include the <limits.h> header file (see e.g. paragraph 4/6 in ISO/IEC 9899:1999).

klibc

Type	Macro	Format	Description
Identification	__KLIBC__		Zero is a valid value
Version	__KLIBC__		Version
Version	__KLIBC_MINOR__		Revision
Version	__KLIBC_PATCHLEVEL__		Patch
Version	__KLIBC_VERSION__	0xVVRRPPPP	VV = Version RR = Revision PPPP = Patch

uClibc

The following macros have to be included from the <features.h> header file.

Type	Macro	Description
Identification	__UCLIBC__
Version	__UCLIBC_MAJOR__	Version
Version	__UCLIBC_MINOR__	Revision
Version	__UCLIBC_SUBLEVEL__	Patch

VMS libc

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

Notice that I am not sure about the format of __CRTL_VER, but it seems to follow that of __VMS_VER.

z/OS libc

Type	Macro	Format	Description
Identification	__LIBREL__		Host
Identification	__TARGET_LIB__		Target
Version	__LIBREL__	0xNVRRPPPP	N = Product (0 = C/370, 1 = MVS, 2 = OS/390, 4 = z/OS) V = Version RR = Revision PPPP = Patch Defined for z/OS XL C/C++
Version	__TARGET_LIB__	As above

Example

Library	__LIBREL__
OS/390 2.10	0x220A0000
z/OS 1.1	0x41010000
z/OS 1.6	0x41060000

Standard C++ Libraries

Dinkumware

Type	Macro	Format	Description
Identification	_CPPLIB_VER		Defined for Dinkumware 2.0 and later
Version	_CPPLIB_VER	VVRR	VV = Version RR = Revision

Example

Dinkumware	Visual C++	_CPPLIB_VER
3.06		306
3.08		308
4.05	2005	405
5.03	2008	503
5.05	2008 SP1	505
5.20	2010	520
5.40	2012	540
6.10	2013	610

GNU libstdc++

One of the standard header files must be included before any of the following macros are defined.

Type	Macro	Format	Description
Version	__GLIBCPP__	YYYYMMDD	YYYY = Year MM = Month DD = Day From GCC 3.0.0 until GCC 3.4.0
Version	__GLIBCXX__	YYYYMMDD	YYYY = Year MM = Month DD = Day From GCC 3.4.0

Example

GCC	__GLIBCPP__	__GLIBCXX__
3.0.0	20010615
3.1.0	20020514
3.2.0	20020814
3.3.0	20030513
3.4.0		20040419

Intel C++ Run-Time Libraries

Type	Macro
Identification	__INTEL_CXXLIB_ICC

libc++

One of the standard header files must be included before any of the following macros are defined.

Type	Macro	Format	Description
Version	_LIBCPP_VERSION	VRRR	V = Version RRR = Revision
Version	_LIBCPP_ABI_VERSION	V	V = ABI Version

Other Libraries

Microsoft Foundation Classes

Type	Macro	Format	Description
Identification	_MFC_VER
Version	_MFC_VER	0xVVRR	VV = Version RR = Revision

Example

MFC	_MFC_VER
4.21	0x0421
6.0	0x0600
7.0	0x0700

 

Top

OperatingSystems 

AIX

Type	Macro	Description
Identification	_AIX
Version	_AIX'VR'	V = Version R = Revision
Identification	__TOS_AIX__	Defined by xlC

Example

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

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

Android

Type	Macro	Format	Description
Identification	__ANDROID__
Version	__ANDROID_API__	V	V = API Version Must be included from <android/api-level.h>

Notice that Android is based on Linux, and that the Linux macros also are defined for Android.

Example

Android Version	__ANDROID_API__
1.0	1
1.1	2
1.5	3
1.6	4
2.0	5
2.0.1	6
2.1	7
2.2	8
2.3	9
2.3.3	10
3.0	11

Amdahl UTS

Type	Macro
Identification	UTS

AmigaOS

Type	Macro	Description
Identification	AMIGA
Identification	__amigaos__	Defined by GNU C

Apollo AEGIS

Type	Macro
Identification	aegis

Apollo Domain/OS

Type	Macro
Identification	apollo

Bada

Based on Nucleus OS.

BeOS

Type	Macro
Identification	__BEOS__

Blue Gene

Type	Macro	Description
Identification	__bg__	All Blue Gene systems Defined by XL C/C++ and GNU C
Version	__bgq__	Blue Gene/Q Defined for XL C/C++ and GNU C
Identification	__THW_BLUEGENE__	All Blue Gene systems Defined by XL C/C++
Version	__TOS_BGQ__	Blue Gene/Q Defined by XL C/C++

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

BSD/OS

Type	Macro
Identification	__bsdi__

ConvexOS

Type	Macro
Identification	__convex__

Cygwin Environment

Type	Macro
Identification	__CYGWIN__

DG/UX

Type	Macro
Identification	DGUX
Identification	__DGUX__
Identification	__dgux__

DragonFly

Type	Macro
Identification	__DragonFly__

DYNIX/ptx

Type	Macro
Identification	_SEQUENT_
Identification	sequent

eCos

Type	Macro
Identification	__ECOS

EMX Environment

Type	Macro
Identification	__EMX__

FreeBSD

Type	Macro	Format	Description
Identification	__FreeBSD__
Identification	__FreeBSD_kernel__		From FreeBSD 8.3, 9.1, and 10.0.1
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.

GNU aka GNU/Hurd

The official name of this operating system is GNU. Hurd is the kernel in the GNU operating system. It is often listed as GNU/Hurd since there is also GNU/Linux and GNU/kFreeBSD, which are most of the GNU operating system with the Linux and FreeBSD kernels respectively.

Type	Macro
Identification	__GNU__ 1
Identification	__gnu_hurd__ 1

GNU/kFreeBSD

GNU/kFreeBSD is one of the Debian distros that is based on the FreeBSD kernel rather than the Linux or Hurd kernels.

Type	Macro
Identification	__FreeBSD_kernel__ && __GLIBC__

Notice that FreeBSD also defines __FreeBSD_kernel__ so the __GLIBC__ macro must be checked to distinguish it.

GNU/Linux

Type	Macro
Identification	__gnu_linux__

HI-UX MPP

Type	Macro
Identification	__hiuxmpp

HP-UX

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

IBM OS/400

Type	Macro	Format	Description
Identification	__OS400__
Version	__OS400_TGTVRM__	VRM	V = Version R = Revision M = Modification

INTEGRITY

Type	Macro
Identification	__INTEGRITY

Interix Environment

Type	Macro	Description
Identification	__INTERIX	Defined by GNU C and Visual Studio

IRIX

Type	Macro
Identification	sgi
Identification	__sgi

Linux kernel

Systems based on the Linux kernel define these macros. There are two major Linux-based operating systems: GNU/Linux and Android, and numerous others like Ångström or OpenEmbedded

Type	Macro	Description
Identification	__linux__	1
Identification	linux	Obsolete (not POSIX compliant)
Identification	__linux	Obsolete (not POSIX compliant)

LynxOS

Type	Macro
Identification	__Lynx__

MacOS

Type	Macro	Description
Identification	macintosh	Mac OS 9
Identification	Macintosh	Mac OS 9
Identification	__APPLE__ && __MACH__	Mac OS X Defined by GNU C and Intel C++

Microware OS-9

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

MINIX

Type	Macro
Identification	__minix

MorphOS

Type	Macro
Identification	__MORPHOS__

MPE/iX

Type	Macro
Identification	mpeix
Identification	__mpexl

MSDOS

Type	Macro
Identification	MSDOS
Identification	__MSDOS__
Identification	_MSDOS
Identification	__DOS__

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

NonStop

Type	Macro
Identification	__TANDEM

Nucleus RTOS

Type	Macro
Identification	__nucleus__

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

OS/2

Type	Macro
Identification	OS2
Identification	_OS2
Identification	__OS2__
Identification	__TOS_OS2__

Palm OS

Type	Macro	Description
Identification	__palmos__	Defined by GNU C in PRC-Tools

Plan 9

Type	Macro
Identification	EPLAN9

Pyramid DC/OSx

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>
Version	BBNDK_VERSION_CURRENT	VVRRRRPPPP	V = Version RRRR = Revision PPPP = Patch Only available on Blackberry 10 From Blackberry 10.1.0 Must be included from <bbndk.h>

Example

QNX	_NTO_VERSION
6.2	620

Reliant UNIX

Type	Macro
Identification	sinux

SCO OpenServer

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

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

Stratus VOS

Type	Macro	Format	Description
Identification	__VOS__
Version	__VOS__	V	V = Version

Notice that the __VOS__ macro is defined by the compiler, but as several compilers can co-exist in the same OS release, the version number is not reliable.

SVR4 Environment

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

Syllable

Type	Macro
Identification	__SYLLABLE__

Symbian OS

Type	Macro
Identification	__SYMBIAN32__

Tru64 (OSF/1)

Type	Macro
Identification	__osf__
Identification	__osf

Ultrix

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

UNICOS

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

UNICOS/mp

Type	Macro	Description
Identification	_CRAY __crayx1

UNIX Environment

Type	Macro
Identification	__unix__
Identification	__unix

Notice 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.

UnixWare

Type	Macro
Identification	sco
Identification	_UNIXWARE7

U/Win Environment

Type	Macro
Identification	_UWIN

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

VxWorks

Type	Macro	Description
Identification	__VXWORKS__	Defined by GNU C and Diab (from ?)
Identification	__vxworks	Defined by GNU C and Diab (from ?)
Version	_WRS_VXWORKS_MAJOR	Version Must be included from <version.h>
Version	_WRS_VXWORKS_MINOR	Revision Must be included from <version.h>
Version	_WRS_VXWORKS_MAINT	Patch/maintenance Must be included from <version.h>
Mode	__RTP__	For real-time mode
Mode	_WRS_KERNEL	For kernel mode

Example

VxWorks	_WRS_VXWORKS_MAJOR	_WRS_VXWORKS_MINOR	_WRS_VXWORKS_MAINT
6.2	6	2	0

Windows

Type	Macro	Description
Identification	_WIN16	Defined for 16-bit environments 1
Identification	_WIN32	Defined for both 32-bit and 64-bit environments 1
Identification	_WIN64	Defined for 64-bit environments 1
Identification	__WIN32__	Defined by Borland C++
Identification	__TOS_WIN__	Defined by xlC
Identification	__WINDOWS__	Defined by Watcom C/C++

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

Wind/U Environment

Type	Macro	Format	Description
Identification	_WINDU_SOURCE
Version	_WINDU_SOURCE	0xVVRRPP	VV = Version RR = Revision PP = Patch

Example

Wind/U	_WINDU_SOURCE
3.1.2	0x030102

z/OS

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

---

Top

Architectures 

Alpha

Type	Macro	Description
Identification	__alpha__	Defined by GNU C
Version	__alpha_ev'V'__	V = Version
Identification	__alpha	Defined by DEC C
Identification	_M_ALPHA	Defined by Visual Studio

Example

CPU	Macro
Alpha EV4	__alpha_ev4__
Alpha EV5	__alpha_ev5__
Alpha EV6	__alpha_ev6__

AMD64

Type	Macro	Description
Identification	__amd64__ __amd64 __x86_64__ __x86_64	Defined by GNU C and Sun Studio
Identification	_M_X64 _M_AMD64	Defined by Visual Studio

Notice that x32 can be detected by checking if the CPU uses the ILP32 data model.

ARM

Type	Macro	Description
Identification	__arm__	Defined by GNU C and RealView
Identification	__thumb__	Defined by GNU C and RealView in Thumb mode
Version	__ARM_ARCH_'V'__	V = Version Defined by GNU C 1
Identification	__TARGET_ARCH_ARM __TARGET_ARCH_THUMB	Defined by RealView
Version	__TARGET_ARCH_ARM = V __TARGET_ARCH_THUMB = V	V = Version
Version	__TARGET_ARCH_'VR'	VR = Version and Revision
Identification	_ARM	Defined by ImageCraft C
Identification	_M_ARM	Defined by Visual Studio
Identification	_M_ARMT	Defined by Visual Studio in Thumb mode
Version	_M_ARM = V	V = Version
Identification	__arm	Defined by Diab

Example

CPU	Macro	_M_ARM
ARM 2	__ARM_ARCH_2__
ARM 3	__ARM_ARCH_3__ __ARM_ARCH_3M__
ARM 4T	__ARM_ARCH_4T__ __TARGET_ARM_4T
ARM 5	__ARM_ARCH_5__ __ARM_ARCH_5E__	5
ARM 5T	__ARM_ARCH_5T__ __ARM_ARCH_5TE__ __ARM_ARCH_5TEJ__
ARM 6	__ARM_ARCH_6__ __ARM_ARCH_6J__ __ARM_ARCH_6K__ __ARM_ARCH_6Z__ __ARM_ARCH_6ZK__	6
ARM 6T2	__ARM_ARCH_6T2__
ARM 7	__ARM_ARCH_7__ __ARM_ARCH_7A__ __ARM_ARCH_7R__ __ARM_ARCH_7M__ __ARM_ARCH_7S__	7

ARM64

Type	Macro	Description
Identification	__aarch64__	Defined by GNU C 1

Blackfin

Type	Macro	Description
Identification	__bfin __BFIN__	Defined by GNU C

Convex

Type	Macro	Description
Identification	__convex__	Defined by GNU C
Version	__convex_'V'__	V = Version

Example

CPU	Macro
Convex C1	__convex_c1__
Convex C2	__convex_c2__
Convex C32xx series	__convex_c32__
Convex C34xx series	__convex_c34__
Convex C38xx series	__convex_c38__

Epiphany

Type	Macro
Identification	__epiphany__

HP/PA RISC

Type	Macro	Description
Identification	__hppa__	Defined by GNU C
Identification	__HPPA__	Defined by Stratus VOS C
Identification	__hppa
Version	_PA_RISC'V'_'R'	V = Version R = Revision

See also OpenPA.net.

Example

CPU	Macro
PA RISC 1.0	_PA_RISC1_0
PA RISC 1.1	_PA_RISC1_1 __HPPA11__ __PA7100__
PA RISC 2.0	_PA_RISC2_0 __RISC2_0__ __HPPA20__ __PA8000__

Intel x86

Type	Macro	Format	Description
Identification	i386 __i386 __i386__		Defined by GNU C
Version	__i386__ __i486__ __i586__ __i686__		Defined by GNU C
Identification	__i386		Defined by Sun Studio
Identification	__i386 __IA32__		Defined by Stratus VOS C
Identification	_M_I86		Only defined for 16-bits architectures Defined by Visual Studio, Digital Mars, and Watcom C/C++ (see note below)
Identification	_M_IX86		Only defined for 32-bits architectures Defined by Visual Studio, Intel C/C++, Digital Mars, and Watcom C/C++
Version	_M_IX86	V00	V = Version
Identification	__X86__		Defined by Watcom C/C++
Identification	_X86_		Defined by MinGW32
Identification	__THW_INTEL__		Defined by XL C/C++
Identification	__I86__		Defined by Digital Mars
Version	__I86__	V	V = Version
Identification	__INTEL__		Defined by CodeWarrior
Identification	__386		Defined by Diab

Notice that Watcom C/C++ defines _M_IX86 for both 16-bits and 32-bits architectures. Use __386__ or _M_I386 to detect 32-bits architectures in this case.

Notice that the Stratus VOS is big-endian on IA32, so these macros cannot be used to detect endianness if __VOS__ is set.

Example

CPU	_M_IX86	__I86__
80386	300	3
80486	400	4
Pentium	500	5
Pentium Pro/II	600	6

Intel Itanium (IA-64)

Type	Macro	Format	Description
Identification	__ia64__ _IA64 __IA64__		Defined by GNU C
Identification	__ia64		Defined by HP aCC
Identification	_M_IA64		Defined by Visual Studio
Identification	_M_IA64		Defined by Intel C/C++
Version	_M_IA64	?
Identification	__itanium__		Defined by Intel C/C++

Example

CPU	_M_IA64 (Intel C/C++)
	64100

Motorola 68k

Type	Macro	Description
Identification	__m68k__	Defined by GNU C
Version	__mc'V'__ __mc'V' mc'V'	V = Version
Identification	M68000	Defined by SAS/C
Identification	__MC68K__	Defined by Stratus VOS C
Version	__MC'V'__	V = Version

Example

CPU	Macro
68000	__mc68000__ __MC68000__
68010	__mc68010__
68020	__mc68020__ __MC68020__
68030	__mc68030__ __MC68030__
68040	__mc68040__
68060	__mc68060__

MIPS

Type	Macro	Description
Identification	__mips__ mips	Defined by GNU C
Version	_MIPS_ISA = _MIPS_ISA_MIPS'V'	V = MIPS ISA level
Version	_R3000 _R4000 _R5900
Identification	__mips	Defined by MIPSpro and GNU C
Version	__mips	The value indicates the MIPS ISA (Instruction Set Architecture) level
Version	__MIPS_ISA'V'__	V = MIPS ISA level
Identification	__MIPS__	Defined by Metrowerks

Example

CPU	_MIPS_ISA	GNU C Macro	__mips	MIPSpro Macro
R2000	_MIPS_ISA_MIPS1		1
R3000	_MIPS_ISA_MIPS1	_R3000	1
R6000	_MIPS_ISA_MIPS2		2	__MIPS_ISA2__
R4000		_R4000
R4400	_MIPS_ISA_MIPS3		3	__MIPS_ISA3__
R8000	_MIPS_ISA_MIPS4		4	__MIPS_ISA4__
R10000	_MIPS_ISA_MIPS4		4	__MIPS_ISA4__

PowerPC

Type	Macro	Description
Identification	__powerpc __powerpc__ __powerpc64__ __POWERPC__ __ppc__ __ppc64__ __PPC__ __PPC64__ _ARCH_PPC _ARCH_PPC64	Defined by GNU C
Version	__ppc'V'__	V = Version
Identification	_M_PPC	Defined by Visual Studio
Version	_M_PPC	?
Identification	_ARCH_PPC _ARCH_PPC64	Defined by XL C/C++
Version	_ARCH_'V'	V = Version
Version	__PPCGECKO__	Gekko Defined by CodeWarrior
Version	__PPCBROADWAY__	Broadway Defined by CodeWarrior
Version	_XENON	Xenon
Identification	__ppc	Defined by Diab

Example

CPU	_M_PPC	Macro	XL Macro
PowerPC 440			_ARCH_440
PowerPC 450			_ARCH_450
PowerPC 601	601	__ppc601__	_ARCH_601
PowerPC 603	603	__ppc603__	_ARCH_603
PowerPC 604	604	__ppc604__	_ARCH_604
PowerPC 620	620

Pyramid 9810

Type	Macro
Identification	pyr

RS/6000

Type	Macro	Description
Identification	__THW_RS6000	Defined by XL C/C++
Identification	_IBMR2
Identification	_POWER
Identification	_ARCH_PWR _ARCH_PWR2 _ARCH_PWR3 _ARCH_PWR4

SPARC

Type	Macro	Description
Identification	__sparc__	Defined by GNU C
Identification	__sparc	Defined by Sun Studio
Version	__sparc_v8__ __sparc_v9__	Defined by GNU C
Version	__sparcv8 __sparcv9	Defined by Sun Studio

Example

CPU	Sun Studio Macro	GNU C Macro
SPARC v8 (SuperSPARC)	__sparcv8	__sparc_v8__
SPARC v9 (UltraSPARC)	__sparcv9	__sparc_v9__

SuperH

Type	Macro	Description
Identification	__sh__	Defined by GNU C
Version	__sh1__ __sh2__ __sh3__ __SH3__ __SH4__ __SH5__

SystemZ

Type	Macro	Description
Identification	__370__ __THW_370__	Identifies System/370 Defined by XL C/C++
Identification	__s390__	Identifies System/390 Defined by GNU C
Identification	__s390x__	Identifies z/Architecture Defined by GNU C
Identification	__zarch__	Identifies z/Architecture Defined by clang
Identification	__SYSC_ZARCH__	Identifies z/Architecture Defined by Systems/C

TMS320

Type	Macro	Description
Identification	_TMS320C2XX __TMS320C2000__	C2000 series
Identification	_TMS320C5X __TMS320C55X__	C5000 series
Identification	_TMS320C6X __TMS320C6X__	C6000 series

Example

DSP	Macro
C28xx	_TMS320C28X
C54x	_TMS320C5XX
C55x	__TMS320C55X__
C6200	_TMS320C6200
C6400	_TMS320C6400
C6400+	_TMS320C6400_PLUS
C6600	_TMS320C6600
C6700	_TMS320C6700
C6700+	_TMS320C6700_PLUS
C6740	_TMS320C6740

TMS470

Type	Macro
Identification	__TMS470__

 

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Related

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