Am 05.02.2009 um 17:39 schrieb Jeff Squyres:
On Feb 4, 2009, at 10:17 AM, Christoph van Wüllen wrote:
I came across OpenMPI because it seems to be the only MPI
implementation
which supports 64-bit integers in FORTRAN, so I had a huge propensity
stepping into this bug.
Since I was the one that championed the whole "what if fortran
INTEGERs are different sizes than C int's?" stuff in OMPI, I glad
that we finally have a user who needs it. :-D
In many cases, FORTRAN with 8-byte integers even work with
"plain vanilla" MPI libs, since a MPI_INTEGER8 data type
is usually available. However, there are cases where integer
pointers are passed to MPI calls (like MPI_COMM_RANK etc.), and
if you fail defining the parameter as "INTEGER*4" in your FORTRAN
program, then you are in trouble. So it is really nice to have
an MPI FORTRAN interface that works with 64-bit integers
natively.
Yours,
+---------------------------------+----------------------------------+
| Prof. Christoph van Wüllen | Tele-Phone (+49) (0)631 205 2749 |
| TU Kaiserslautern, FB Chemie | Tele-Fax (+49) (0)631 205 2750 |
| Erwin-Schrödinger-Str. | |
| D-67663 Kaiserslautern, Germany | vanwul...@chemie.uni-kl.de |
| |
| HomePage: http://www.chemie.uni-kl.de/wcms/ag-vanwullen.html |
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