跨平台程序,经常要用到区分系统的宏定义,比如windows中的WIN32, WIN64, Linux中的 unix, linux等等系统自定义宏
那么在linux下面,怎么查看系统有哪些自定义宏咧,用如下方法:
$ touch dummy.hxx
$ cpp -dM ./dummy.hxx
输出如下:
[xhq@syfh1-10-0-128-229 server]$ cpp -dM ./dummy.hxx
#define __DBL_MIN_EXP__ (-1021)
#define __FLT_MIN__ 1.17549435e-38F
#define __CHAR_BIT__ 8
#define __WCHAR_MAX__ 2147483647
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_1 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_2 1
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_4 1
#define __DBL_DENORM_MIN__ 4.9406564584124654e-324
#define __GCC_HAVE_SYNC_COMPARE_AND_SWAP_8 1
#define __FLT_EVAL_METHOD__ 0
#define __unix__ 1
#define __x86_64 1
#define __DBL_MIN_10_EXP__ (-307)
#define __FINITE_MATH_ONLY__ 0
#define __GNUC_PATCHLEVEL__ 7
#define __DEC64_MAX_EXP__ 385
#define __SHRT_MAX__ 32767
#define __LDBL_MAX__ 1.18973149535723176502e+4932L
#define __UINTMAX_TYPE__ long unsigned int
#define __linux 1
#define __DEC32_EPSILON__ 1E-6DF
#define __unix 1
#define __LDBL_MAX_EXP__ 16384
#define __linux__ 1
要查看全部,可以加less命令:
$ cpp -dM ./dummy.hxx | less
就可以光标向上翻或者向下翻,因为系统可能宏定义比较多,一屏看不过来
以上原文地址:http://blog.csdn.net/xiaoheqin/article/details/52183073
另附上各操作系统的平台宏定义
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 |
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 |
Type | Macro |
---|
Identification | UTS |
Type | Macro | Description |
---|
Identification | AMIGA | |
Identification | __amigaos__ | Defined by GNU C |
Type | Macro |
---|
Identification | aegis |
Type | Macro |
---|
Identification | apollo |
Based on Nucleus OS.
Type | Macro |
---|
Identification | __BEOS__ |
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++ |
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 | |
Type | Macro |
---|
Identification | __bsdi__ |
Type | Macro |
---|
Identification | __convex__ |
Type | Macro |
---|
Identification | __CYGWIN__ |
Type | Macro |
---|
Identification | DGUX |
Identification | __DGUX__ |
Identification | __dgux__ |
Type | Macro |
---|
Identification | __DragonFly__ |
Type | Macro |
---|
Identification | _SEQUENT_ |
Identification | sequent |
Type | Macro |
---|
Identification | __ECOS |
Type | Macro |
---|
Identification | __EMX__ |
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.
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 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.
Type | Macro |
---|
Identification | __gnu_linux__ |
Type | Macro |
---|
Identification | __hiuxmpp |
Type | Macro | Description |
---|
Identification | _hpux | Defined by HP UPC |
Identification | hpux | |
Identification | __hpux | |
Type | Macro |
---|
Identification | __OS400__ |
Type | Macro |
---|
Identification | __INTEGRITY |
Type | Macro | Description |
---|
Identification | __INTERIX | Defined by GNU C and Visual Studio |
Type | Macro |
---|
Identification | sgi |
Identification | __sgi |
Systems based on the Linux kernel define these macros. There are two major Linux-based operating systems: GNU/Linuxand 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) |
Type | Macro |
---|
Identification | __Lynx__ |
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++ |
Type | Macro | Description |
---|
Identification | __OS9000 | Defined by Ultimate C/C++ |
Identification | _OSK | Defined by Ultimate C/C++ |
Type | Macro |
---|
Identification | __minix |
Type | Macro |
---|
Identification | __MORPHOS__ |
Type | Macro |
---|
Identification | mpeix |
Identification | __mpexl |
Type | Macro |
---|
Identification | MSDOS |
Identification | __MSDOS__ |
Identification | _MSDOS |
Identification | __DOS__ |
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 | |
Type | Macro |
---|
Identification | __TANDEM |
Type | Macro |
---|
Identification | __nucleus__ |
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 |
Type | Macro |
---|
Identification | OS2 |
Identification | _OS2 |
Identification | __OS2__ |
Identification | __TOS_OS2__ |
Type | Macro | Description |
---|
Identification | __palmos__ | Defined by GNU C in PRC-Tools |
Type | Macro |
---|
Identification | EPLAN9 |
Type | Macro |
---|
Identification | pyr |
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
Type | Macro |
---|
Identification | sinux |
Type | Macro | Description |
---|
Identification | M_I386 | Defined by GNU C |
Identification | M_XENIX | Defined by GNU C |
Identification | _SCO_DS | |
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 |
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.
Type | Macro | Description |
---|
Identification | __sysv__ | |
Identification | __SVR4 | |
Identification | __svr4__ | |
Identification | _SYSTYPE_SVR4 | Defined on IRIX |
Type | Macro |
---|
Identification | __SYLLABLE__ |
Type | Macro |
---|
Identification | __SYMBIAN32__ |
Type | Macro |
---|
Identification | __osf__ |
Identification | __osf |
Type | Macro |
---|
Identification | ultrix |
Identification | __ultrix |
Identification | __ultrix__ |
Identification | unix & vax |
Type | Macro | Format | Description |
---|
Identification | _UNICOS | | |
Version | _UNICOS | V | V = Version |
Type | Macro | Description |
---|
Identification | _CRAY __crayx1 | |
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.
Type | Macro |
---|
Identification | sco |
Identification | _UNIXWARE7 |
Type | Macro |
---|
Identification | _UWIN |
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 |
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 |
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++ |
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 |
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 |
Type | Macro | Description |
---|
Identification | __MVS__ | Host |
Identification | __HOS_MVS__ | Host |
Identification | __TOS_MVS__ | Target |
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