[Predef-contribute] Stratus VOS C Compiler Macro Definitions

[Green, P. <Pau...@st...>]

Hello, Here is some information about the Stratus VOS operating system,
C/C++ compilers, and hardware platforms that can be added to your web
pages.  Contact me for clarifications.

Compilers:

Stratus VOS C
  Identification: __VOSC__
  Format: V = Version
  Description: 0
  Example: 
    c __VOSC__  0  /* The name of this compiler is "c"; this is a K+R
compiler that should no longer be used! */

Stratus VOS Standard C
  Identification: __VOSC__
  Format: V = Version
  Description: 1
  Example: 
    cc __VOSC__  1  /* The name of this compiler is "cc"; this is an
ANSI-C compiler. */

Stratus VOS GNU C/C++
  Identification: __GNUC__
  Format: V = Version
  Description: The major version number
  Example:
    2.95.2  __GNUC__  2  /* The name of this compiler is gcc or g++ */
    3.4.6   __GNUC__  3

Libraries:

Not applicable  (Stratus has its own C/POSIX libraries; we don't use
GLIBC). We do use the standard template libraries for g++.

Operating Systems:

Stratus VOS or OpenVOS

Type: Identification
Macro: __VOS__
Description: V = Major Release
Example:  The value is an integer that identifies the major release
number. However, the value is unreliable, as multiple versions of the
compiler can co-exist on the same release. Just test to see if the macro
is defined.


Architectures:

All VOS compilers (cc / gcc / g++) define one or more of these macros,
as appropriate, for HPPA. Note that our port of gcc / g++ only
implements the PA7100 / HPPA11 architecture.

__HPPA__
__HPPA11__
__HPPA20__
__PA7100__
__PA8000__
_PA_RISC1_1
_PA_RISC2_0

All VOS compilers (cc / gcc / g++) define all of these macros for IA32.
GNU C/C++ defines some additional macros for IA32, as usual.

__i386
__IA32__


Note well: The Stratus VOS operating system and compilers are normally
BIG ENDIAN on the IA32. Code that assumes that if the __i386 or __IA32__
macros are defined then the system is LITTLE ENDIAN ***will fail***.
Code must independently test for endianness; the usual tests for
endianness will work fine.  (Our compilers do have secret options that
can be used to build Little Endian code for certain system programming
purposes, so you can't assume that we are only big endian, either).


Thanks
PG
--
Sr. Technical Consultant, Stratus Technologies Inc.
Work: +1-978-461-7557; FAX: +1-978-461-3610; Twitter: stratuspaulg