On Jul 16, 2008, at 11:24 AM, William Gropp wrote:
> One piece of relevant text in MPI 2.0 is in section 4.12.6 (in
> MPI-2.0) says that "All predefined datatypes can be used in datatype
> constructors in any language." However, the example uses
> MPI_Type_f2c ton convert the Fortran handle to the C version before
> passing it into the MPI_Type_create_struct routine, so this text
> could be interpreted as allowing the use of those datatypes through
> the handle conversion mechanism without requiring them to be defined
> in each languages header file. Presumably the requirement is that
> they be predefined with the value that you'd get from the handle
> conversion function?
The text in Annex B is stronger than that, though. It specifically
states "they are therefore defined for all three language bindings" --
is that a mistake?
>>> 2. Section 3.2.2 on page 27, Section 16.1.6 on page 453, and Annex
>>> A.1
>>> on page 491.
>>> MPI_LONG_LONG_INT, MPI_LONG_LONG (as synonym),
>>> MPI_UNSIGNED_LONG_LONG,
>>> MPI_SIGNED_CHAR, and MPI_WCHAR are moved from optional to official
>>> and they
>>> are therefore deï¬ned for all three language bindings.
--
Jeff Squyres
Cisco Systems
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