| Macro | Description |
|---|---|
| __DATE__ | The compilation date of the current source file. The date is a string
literal of the form Mmm dd yyyy.
The month name Mmm is the same as for dates generated by the library function asctime declared in TIME.H. |
| __FILE__ | The name of the current source file. __FILE__ expands to a string surrounded by double quotation marks. |
| __LINE__ | The decimal line number in the current source file. It can be altered with a #line directive. |
| __STDC__ | Indicates full conformance with the ANSI C standard.
Defined as 1 only if the/Za compiler option is given and you are not compiling C++ code; otherwise is undefined. |
| __TIME__ | The most recent compilation time of the current source file. The time is a string literal of the form hh:mm:ss. |
| __TIMESTAMP__ | The date and time of the last modification of the current source file,
expressed as a string literal in the form
Ddd Mmm Date hh:mm:ss yyyy where Ddd is the abbreviated day of the week and Date is an integer from 1 to 31. |
| Macro | Description |
|---|---|
| _ATL_VER | Defines the ATL version. |
| _CHAR_UNSIGNED | Default char type is unsigned. (Defined when /J is specified). |
| __COUNTER__ | Expands to an integer starting with 0 and incrementing by 1 every time it is used in a compiland. |
| __cplusplus | Defined for C++ programs only. |
| _CPPLIB_VER | Defined if you include any of the Dinkumware C++ Standard Library headers.
Reports which version of the Dinkumware header files are present. |
| _CPPRTTI | Defined for code compiled with (/GR) Enable Run-Time Type Information. |
| _CPPUNWIND | Defined for code compiled with (/GX) Enable Exception Handling. |
| _DEBUG | Defined when compiling with Debug Support (/LDd, /MDd, /MLd, and /MTd). |
| _DLL | Defined when (/MD or /MDd) Multithread DLL is specified. |
| __FUNCDNAME__ | Valid only within a function and returns the decorated name of the enclosing function (as a string). __FUNCDNAME__ is not expanded if you use the /EP or /P compiler option. |
| __FUNCSIG__ | Valid only within a function and returns the signature of the enclosing function (as a string). __FUNCSIG__ is not expanded if you use the /EP or /P compiler option. |
| __FUNCTION__ | Valid only within a function and returns the undecorated name of the enclosing function (as a string). __FUNCTION__ is not expanded if you use the /EP or /P compiler option. |
| _M_ALPHA | Defined to be 1 for DEC ALPHA platforms, else not defined. |
| _M_IX86 | Defined for x86 processors. See Values for _M_IX86 for more details. |
| _M_IA64 | Defined for 64-bit processors. |
| _M_MPPC | Defined for Power Macintosh platforms (no longer supported). |
| _M_MRX000 | Defined for MIPS platforms (no longer supported). |
| _M_PPC | Defined for PowerPC platforms (no longer supported). |
| _MANAGED | Defined to be 1 when .NET platform (/clr) is specified. |
| _MFC_VER | Defines the MFC version. For example, 0x0700 represents MFC version 7. |
| _MSC_EXTENSIONS | This macro is defined to be 1 when compiling with Microsoft Extensions (/Ze) (the default). |
| _MSC_VER | Defines the major and minor versions of the compiler (decimal!).
For example, 1300 for Microsoft Visual C++ .NET represents version 13. |
| __MSVC_RUNTIME_CHECKS | Defined when one of the Runtime Checks (/RTC) compiler options is specified. |
| _MT | Defined when (/MD or /MDd) Multithreaded DLL or (/MT or /MTd) Multithreaded is specified. |
| _WCHAR_T_DEFINED
_NATIVE_WCHAR_T_DEFINED |
Defined when wchar_t is defined. Typically, wchar_t is
defined when you use /Zc:wchar_t
or when typedef unsigned short wchar_t; is executed in code. |
| _WIN32 | Defined for applications for Win32 and Win64. |
| _WIN64 | Defined for applications for Win64. |
| _Wp64 | Defined when specifying (/Wp64) Portability Diagnostics. |
| Option in Development Environment | Command-Line Option | Resulting Value |
|---|---|---|
| Blend | /GB (default) | Current default (2004): _M_IX86 = 600 |
| Pentium | /G5 | _M_IX86 = 500 |
| Pentium Pro, Pentium II, and Pentium III | /G6 | _M_IX86 = 600 |
| 80386 | /G3 | _M_IX86 = 300 |
| 80486 | /G4 | _M_IX86 = 400 |