[Mpi-forum] MPI_Count

Jeff Squyres jsquyres at cisco.com
Mon Jan 25 19:15:25 CST 2010

On Jan 25, 2010, at 4:33 PM, Darius Buntinas wrote:

> >> There are many different ways where<stdint.h>  integers cause portability,
> >> efficiency and other problems.  Inter alia, the current revision of C is
> >> thinking of changing them in ways that could be incompatible with old code,
> >> and they are semantically incompatible with Fortran and many other languages
> >> in several respects.

> Did the person state what the portability issues with int64_t could be?
>   Is there a C "basic type" that would be compatible with a fortran
> INTEGER*8?  BTW, we already added stdint datatypes to MPI 2.2.

Nick -- most people thought using "MPI_Count" as a type is fine, but I, too, am curious about Darius' question (above).  Could you comment?  (if you're not a member of the mpi-forum list, I can forward your reply)

Jeff Squyres
jsquyres at cisco.com

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