Macro 

Value 

Description 

__BCOPT__  

1  

Defined only in compilers that support optimization, therefore always defined.  

__BCPLUSPLUS__  

• 0x0570 for BDS 2006
• 0x0590 for C++Builder 2007
• 0x0591 for update 1 to C++Builder 2007
• 0x0592 for RAD Studio 2007
• 0x0593 for the December update to RAD Studio 2007
• 0x0610 for C++Builder 2009 and for C++Builder 2009 Update 1

 

Defined if you've selected C++ compilation; will increase in later releases.  

__BOOL__ 

1 

Indicates that the bool keyword is accepted. 

__BORLANDC__  

• 0x0570 for BDS 2006
• 0x0590 for C++Builder 2007
• 0x0591 for update 1 to C++Builder 2007
• 0x0592 for RAD Studio 2007
• 0x0593 for the December update to RAD Studio 2007
• 0x0610 for C++Builder 2009 and for C++Builder 2009 Update 1

 

Version number.  

__CDECL__  

1  

Defined if Calling Convention is set to cdecl; otherwise undefined.  

_CHAR_UNSIGNED  

1  

Undefined by default. Using the -K switch to make the default character unsigned causes this macro to be defined. Ultimately, the -K option controls how a char is extended when converted to an int. By default, the compiler sign-extends, but if you enable _CHAR_UNSIGNED_, then the compiler zero-extends characters when converting to int.  

__CODEGEARC__  

0x0610 for C++Builder 2009  

Version number.  

__CODEGUARD__  

 

Defined whenever one of the CodeGuard compiler options is used; otherwise it is undefined.  

__CONSOLE__  

1  

When defined, the macro indicates that the program is a console application.  

_CPPUNWIND  

1  

Enable stack unwinding. This is true by default; use -xd-!ALink(OSCGExceptions1) to disable.  

__cplusplus  

1  

Defined if in C++ mode; otherwise, undefined.  

__DATE__  

String literal  

Date when processing began on the current file.  

__DLL__  

1  

Defined whenever the -WD compiler option is used; otherwise it is undefined.  

__FILE__  

String literal  

Name of the current file being processed.  

__FLAT__  

1  

Defined when compiling in 32-bit flat memory model.  

__FUNC__  

String literal  

Name of the current function being processed. More details.  

__LINE__  

Decimal constant  

Number of the current source file line being processed.  

_M_IX86  

0x12c  

Always defined. The default value is 300. You can change the value to 400 or 500 by using the /4 or /5 compiler options.  

__MT__  

1  

Defined only if the -tWM option is used. It specifies that the multithread library is to be linked.  

__PASCAL__  

1  

Defined if Calling Convention is set to Pascal; otherwise undefined.  

_PUSHPOP_SUPPORTED  

1  

Always defined; allows Microsoft standard headers to use push and pop to verify whether a feature is supported.  

_STDCALL_SUPPORTED  

1  

Always defined; defines the Microsoft stdcall calling convention.  

__STDC__  

1  

Defined if you compile with the -A compiler option; otherwise, it is undefined.  

__TCPLUSPLUS__  

0x0570
0x0610 for C++Builder 2009  

Version number.  

__TEMPLATES__  

1  

Defined as 1 for C++ files (meaning that templates are supported); otherwise, it is undefined.  

__TIME__  

String literal  

Time when processing began on the current file.  

__TLS__  

1  

Thread Local Storage. Always true.  

__TURBOC__  

• 0x0570 for BDS 2006
• 0x0590 for C++Builder 2007
• 0x0591 for update 1 to C++Builder 2007
• 0x0592 for RAD Studio 2007
• 0x0593 for the December update to RAD Studio 2007
• 0x0610 for C++Builder 2009 and for C++Builder 2009 Update 1

 

Will increase in later releases.  

_WCHAR_T  

 

Defined only for C++ programs to indicate that wchar_t is an intrinsically defined data type.  

_WCHAR_T_DEFINED  

 

Defined only for C++ programs to indicate that wchar_t is an intrinsically defined data type.  

_Windows  

1  

Defined when compiling on the Windows platform.  

__WIN32__  

1  

Defined for console and GUI applications on the Windows platform.