[petsc-dev] Bad use of defined(MPI_XXX)

[Lisandro Dalcin]

On Sat, 25 May 2019 at 06:20, Smith, Barry F. via petsc-dev <
petsc-dev at mcs.anl.gov> wrote:

>
>   MS-MPI has in their include file
>
> #define MPI_VERSION     2
> #define MPI_SUBVERSION  0
>
> Their last release was Oct 2018
> https://docs.microsoft.com/en-us/message-passing-interface/microsoft-mpi-release-notes
>
>
Maybe they are just being honest? Other implementations claim MPI 2.0
support, but they do not support e.g. MPI_Comm_spawn() and related routines.

I think some important bits like MPI_Reduce_local() have been supported
since long time ago. Note that v4.2 is from 2014 (
https://www.microsoft.com/en-us/download/details.aspx?id=41634).

Here you have a summary of what MS MPI adds on top of MPI 2.0 release after
release starting from v4.2

https://bitbucket.org/mpi4py/mpi4py/src/master/src/lib-mpi/config/msmpi.h

-- 
Lisandro Dalcin
============
Research Scientist
Extreme Computing Research Center (ECRC)
King Abdullah University of Science and Technology (KAUST)
http://ecrc.kaust.edu.sa/
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