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From: Terry D. Dontje (Terry.Dontje_at_[hidden])
Date: 2007-06-19 10:35:49


Rainer Keller wrote:

> Hello dear all,
> with the current numbering in mpif-common.h, the optional ddt
> MPI_REAL2 will
> break the binary compatibility of the fortran interface from v1.2 to
> v1.3
> (see r15133).
>
> Now apart from MPI_REAL2 being of let's say rather minor importance,
> the group
> may feal that the numbering of datatypes is crucial to the end user
> and the
> (once agreed upon) allowed binary incompatibility for major version
> number
> changes is void.
>
> (The most important datatype that this change affects is
> MPI_DOUBLE_PRECISION:
> users will need to recompile their code with v1.3...)
>
> Please raise Your hand if anybody cares.
>
<raising hand>
Sun cares very much about this for the exact reason you state (Binary
compatibility).
I'd prefer this ddt is placed at the end of the list.

thanks,

--td