Re: [Predef-contribute] open64 prefeds

[Bjorn R. <br...@ma...>]

On 04/26/2013 07:55 AM, Paul Hargrove wrote:
> You already have that __OPENCC__ is the identifying symbol for Open64.
> I can add that __OPENCC__ is the compiler's major version
> and __OPENCC_MINOR__ is the minor number, both are integers.
> Additionally, __OPENCC_PATCHLEVEL__ is a patch level but is NOT always
> an integer (e.g. "3.2" without the quotes).
> Finally __OPEN64__ is a version string

Thank you for letting us know about the __OPENCC_* macros. I will add
them to the predef pages.

However, before I do that, I need to clarify the the role of __OPEN64__
versus __OPENCC__, because I am a bit confused about it. According to
the AMD manual [1] the -opencc option "instructs the compiler to define
the __OPEN64__ macro and other predefined preprocessor macros." Here it
seems that __OPEN64__ is used to identify the compiler. Also, when I
look at various source code for Open64, such as as OpenMPI, the use
__OPEN64__ to identify, and __OPENCC__ to detect the major version.

Given that Open64 uses gcc as a frontend, could you show me the results
of this command?

   % gcc -E -dM -xc /dev/null


[1] http://developer.amd.com/wordpress/media/2012/10/open64.pdf