HP aCC

See the Predefined Macros section of the HP aCC 6 Programmers Guide for a (possibly) incomplete list of macros predefined by the compiler.

Starting with HP aCC 6.15, the compiler supports the -dM option to list the #define directives the preprocessor encounters as it translates a file.

See also the Bjørn Reese's list of Pre-defined Compiler Macros.

	HP aCC Predefined Macros
MACRO	HP aCC OPTION	VERSION	DESCRIPTION
`EDG`		6	Defined to 1 in all EDG-based HP aCC compilers.
`__HP_aCC`		all	Defined to the version of the compiler in the format `MMmmuu` (2 digits for each of major, minor, and micro).
`__hpxstd98`	+hpxstd98 (http://docs.hp.com/en/11920/HP%20aC++%20Online%20Programmer's%20Guide/options.htm#opt+hpxstd98)	3.80	Defined to 1 when the `+hpxstd98` option is used.
`__hpux`		all	Defined on all HP-UX versions.
`__ia64`		5,6	Defined on HP IPF hardware.
`__hppa`		1, 3	Defined on PA-RISC hardware.
`__unix`		all	Defined on all HP-UX versions.
`_BIG_ENDIAN`		all	Defined on Big Endian versions of HP-UX (both IPF and PA-RISC).
`_ILP32`	+DD32	all	Defined when +DD32 is in effect.
`_LP64`, `LP64`	+DD64	all	Defined when +DD64 is in effect.
`__HPACC_NOEH`	+noeh	all	Defined when exceptions are disabled.
`_HPUX_SOURCE`, `STDC_EXT`	-ext	all	Defined when extensions are enabled.
`_FPWIDETYPES`	-fpwidetypes		Defined when extended and quad floating-point data types including `__float80` are enabled.
`_REENTRANT`	-mt	all	Defined when compiling for thread safety.
`_POSIX_C_SOURCE=199506L`	-mt	all
`_HPUX_SOURCE`	-mt	all
`_THREAD_SAFE`	-AP -mt	all
`_HP_NAMESPACE_STD`	-AA		Defined when the C++ Standard Library is declared in `namespace std`.
`_FLT_EVAL_METHOD`	-fpeval	all	Defined according to the argument of the `-fpeval` option.
{{_Math_errhandling }}		all	Always defined to `MATH_ERREXCEPT`.

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