Re: [Libmesh-devel] MPI_LB/MPI_UB in parallel_algebra.h?

[Roy S. <roy...@ic...>]

On Mon, 16 Sep 2013, Kirk, Benjamin (JSC-EG311) wrote:

> On Sep 16, 2013, at 11:49 AM, "Kirk, Benjamin (JSC-EG311)" <ben...@na...>
> wrote:
>
>> I'm building against openmpi 1.7.2 to try and remove all deprecated MPI-1 functionality, and I've got a sticking point in parallel_algebra.h.
>>
>> The MPI_LB/MPI_UB macros are deprecated, and I'm not sure what the proper replacement is in that file for their usage.  Looks like we are trying to protect for vtable's in an array of libMesh::TypeVector<T>'s?  How is it we know to add two datatypes around the actual contents of the vector?
>>
>> http://www.mpi-forum.org/docs/mpi21-report/node27.htm
>> ------------------------------------------------------------------------------
>
> To follow up on my own thread:
>
> http://stackoverflow.com/questions/16738257/mpi-bcast-broadcast-of-a-stdvector-of-structs?rq=1
>
> looks instructive with
> MPI_Type_create_resized
>
> but I can't believe this is a better solution.

It's at the very least an incomplete solution.
MPI_Type_create_resized isn't in MPI 1.3; to keep backwards
compatibility we'd need an #ifdef nest there.
---
Roy