6. Predefined macros

The compiler defines several macros at startup:

__CC65__

This macro is always defined. Its value is the version number of the compiler in hex. Version 2.0.1 of the compiler will have this macro defined as 0x0201.

__APPLE2__

This macro is defined if the target is the Apple ][ (-t apple2).

__ATARI__

This macro is defined if the target is one of the Atari computers (400/800/130XL/800XL).

__ATMOS__

This macro is defined if the target is the Oric Atmos (-t atmos).

__CBM__

This macro is defined if the target system is one of the CBM targets.

__C16__

This macro is defined if the target is the c16 (-t c16).

__C64__

This macro is defined if the target is the c64 (-t c64).

__C128__

This macro is defined if the target is the c128 (-t c128).

__PLUS4__

This macro is defined if the target is the plus/4 (-t plus4).

__CBM510__

This macro is defined if the target is the CBM 500 series of computers.

__CBM610__

This macro is defined if the target is one of the CBM 600/700 family of computers (called B series in the US).

__PET__

This macro is defined if the target is the PET family of computers (-t pet).

__GEOS__

This macro is defined if you are compiling for the GEOS system (-t geos).

__FILE__

This macro expands to a string containing the name of the C source file.

__LINE__

This macro expands to the current line number.

__STRICT_ANSI__

This macro is defined to 1 if the -A compiler option was given, and undefined otherwise.

__OPT__

Is defined if the compiler was called with the -O command line option.

__OPT_i__

Is defined if the compiler was called with the -Oi command line option.

__OPT_r__

Is defined if the compiler was called with the -Or command line option.

__OPT_s__

Is defined if the compiler was called with the -Os command line option.