Microchip Technology SW006023-2 Data Sheet

®

DS51686E-page 172

 2012 Microchip Technology Inc.

These predefined macros are available for use with the compiler:

• 32-Bit C/C++ Compiler Macros

• SDE Compatibility Macros

The compiler defines a number of macros, most with the prefix “_MCHP_,” which 
characterize the various target specific options, the target processor and other aspects 
of the host environment.C/C++

_MCHP_SZINT

32 or 64, depending on command line options 
to set the size of an integer 

(-mint32 

-mint64)

_MCHP_SZLONG

32 or 64, depending on command line options 
to set the size of an integer 

(-mlong32 

-mlong64)

_MCHP_SZPTR

32 always since all pointers are 32 bits

__mchp_no_float

Defined if 

-mno-float

 specified

__NO_FLOAT

Defined if 

-mno-float

 specified

__PIC__

__pic__

The translation unit is being compiled for 
position independent code

__PIC32MX

__PIC32MX__

Always defined

__PIC32_FEATURE_SET__

The compiler predefines a macro based on 
the features available for the selected device. 
These macros are intended to be used when 
writing code to take advantage of features 
available on newer devices while maintaining 
compatibility with older devices.
Examples: PIC32MX795F512L would use 

__PIC32_FEATURE_SET__ == 795

, 

and PIC32MX340F128H would use 

__PIC32_FEATURE_SET__ == 340

PIC32MX

Defined if 

-ansi

 is not specified

__LANGUAGE_ASSEMBLY

__LANGUAGE_ASSEMBLY__

_LANGUAGE_ASSEMBLY

Defined if compiling a pre-processed 
assembly file (.S files)

LANGUAGE_ASSEMBLY

Defined if compiling a pre-processed 
assembly file (.S files) and 

-ansi

 is not 

specified

__LANGUAGE_C

__LANGUAGE_C__

_LANGUAGE_C

Defined if compiling a C file

LANGUAGE_C

Defined if compiling a C file and 

-ansi

 is not 

specified

__LANGUAGE_C_PLUS_PLUS

__cplusplus

_LANGUAGE_C_PLUS_PLUS__

Defined if compiling a C++ file

__EXCEPTIONS

Defined if X++ exceptions are enabled

__GXX_RTTI

Defined if runtime type information is enabled