ML with OpenMPI

[Lisandro Dalcin]

Well, then that would mean that I was using ML through PETSc in
PARALLEL runs with no MPI support !!! Do you believe that scenario is
possible?

Looking at ML configure script and generated makefiles, in them there
is a line saying>

DEFS = -DHAVE_CONFIG_H

Do you have that line? Next, this $(DEFS) is included in compiler
command definition.

Additionally, I did

$ nm -C libml.a | grep MPI

and undefined references to the MPI functions appered as expected.


Sorry about my insinstence, but I believe we need to figure out what's
exactly going on.



On 3/25/08, Jed Brown <jed at 59a2.org> wrote:
> I let PETSc build it for me.  I think you did not notice the problem because
>  MPICH2 defines MPI_Comm to be an int which happens to be the same as used by ML
>  in their dummy MPI so there is no type mismatch.  From the contents of
>  ml_common.h, it looks like you would still run into trouble if you were using
>  optional features of ML.  The reason I like OpenMPI is exactly this stronger
>  type checking and that it seems to crash sooner when I have a bug.
>
>
>  Jed
>
>


-- 
Lisandro Dalcín
---------------
Centro Internacional de Métodos Computacionales en Ingeniería (CIMEC)
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