[Mpi3-rma] Target displacement sign issue

[Jim Dinan]

On 8/28/12 2:33 PM, Dries Kimpe wrote:
>> Breaking backwards compatibility is worse than whatever portability
>> issues you can come up with, especially with something as fundamental
>> as MPI_Aint.
>
> Good point.
>
> Question: do you know of any instances where MPI_Aint is used to hold a
> negative value?

In e.g. MPI_Type_create_hindexed, the MPI_Aint displacement arguments 
can represent both positive and negative displacements.

  ~Jim.