[MPIWG Fortran] Another MPI_SIZEOF question

[Jeff Squyres (jsquyres)]

On Jun 10, 2014, at 10:10 AM, William Gropp <wgropp at illinois.edu> wrote:

> Jeff, as I noted before, in MPI-2, MPI_SIZEOF was not required for the Fortran "basic" support, thus MPI-2 did not break the existing practice with Fortran 77 compilers and the mpif.h include file (see the beginning of section 10.2.5 in MPI-2).

Sorry, you're right -- you even said this earlier in the thread.  My mistake.

> The issue is deciding that mpif.h is not a way to compile MPI programs with a Fortran compiler that is for Fortran before 2008 + TS29113 but simply a different interface to the one true and only Fortran interface - which isn't even yet standard (since it requires TS29113).

Same question as I asked before: Is 2003 or 2008+TS29113 required for SIZEOF?  I have no knowledge of when INTERFACE blocks were added to Fortran.

I'm asking this because DIMENSION(..) is *useful* to implement MPI_SIZEOF succinctly/easily, but it is not *required*.

-- 
Jeff Squyres
jsquyres at cisco.com
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