Hi, a short question: If an MPI library implementation declares the MPI routines as bind C, is then the internal call mechanism standardized? Or identical with all C compilers because the handle call by reference for integers and structurs identical? Best regards Rolf ----- "Aleksandar Donev" <[email protected]> wrote:

Hi,

...

I hope that these citations are correct in relation to the official Fortran 2003 standard. Sure, it all is more or less right.

...

Based on this, for use mpi and use mpi3, only one identical backend (written in C) should be necessary. OK, fine, but that is not implied by the words you quoted. For example, it is perfectly possible (plausible) for an integer and a struct to be

passed differently (e.g., integer goes in register, the struct on the

stack), and adding SEQUENCE does nothing to change that. If you are relying on some "backend" (meaning, really, ABI) property, say so, do

not pretend that the Fortran standard guarantees something it does not.

This is not to say that it will not be possible to still use one backend even if the interface says TYPE(MPI_Comm) instead of INTEGER---but that is outside the scope of the Fortran standard. One should instead look at ABIs and conventions compilers use to pass such arguments around.

Best, Aleks _______________________________________________ mpi3-fortran mailing list [email protected] http://lists.mpi-forum.org/mailman/listinfo.cgi/mpi3-fortran

-- Dr. Rolf Rabenseifner . . . . . . . . . .. email [email protected] High Performance Computing Center (HLRS) . phone ++49(0)711/685-65530 University of Stuttgart . . . . . . . . .. fax ++49(0)711 / 685-65832 Head of Dpmt Parallel Computing . . . www.hlrs.de/people/rabenseifner Nobelstr. 19, D-70550 Stuttgart, Germany . (Office: Allmandring 30)