Fortran integer declaration in petscdef.h

[Matthew Knepley]

On Mon, Apr 7, 2008 at 9:48 AM, Thomas DE-SOZA <thomas.de-soza at edf.fr> wrote:
>
> Hi,
>
> I was wondering if in $PETSC_DIR/include/finclude/petscdef.h :
>
>     50        #if defined(PETSC_HAVE_MPIUNI)
>     51        #define MPI_Comm PetscFortranInt
>     52        #define PetscMPIInt PetscFortranInt
>     53        #else
>     54        #define MPI_Comm integer
>     55        #define PetscMPIInt integer
>     56        #endif
>
> the integer declaration should not be changed to something dependent on
> PETSC_SIZEOF_INT.

This is an internal type we use to represent communicators in our own mini-MPI
implementation. Our choice merely limits the number of unique communicators
in the program to 2^32 on a 32bit machine. This is not usually an obstacle.

  Matt

> Regards,
>
> Thomas
-- 
What most experimenters take for granted before they begin their
experiments is infinitely more interesting than any results to which
their experiments lead.
-- Norbert Wiener