Problem 2120

Summary: C++ bindings have been removed from the MPI standard and Open-MPI has deprecated them
Product: Examples/Extended Reporter: James <jamesmatta>
Component: paralle/MPIAssignee: Koichi Murakami <Koichi.Murakami>
Status: CLOSED WONTFIX    
Severity: minor CC: Ivana.Hrivnacova
Priority: P4    
Version: 10.4   
Hardware: All   
OS: All   

Description James 2019-01-17 21:24:01 CET 
The C++ bindings have been removed from the MPI standard and Open-MPI no longer builds them by default. Because of this the C++ bindings used by the example are not present in a default install of open-mpi. However CMAKE detects the install of open-mpi and proceeds as if open-mpi C++ bindings are present.

Currently if you install open-MPI with `--enable-mpi-cxx-bindings` the bindings will be present (I have not had the opportunity to verify this), but a purely default install of open-mpi will cause parallel/MPI to be built despite the lack of necessary bindings.

Possible solutions:
Use Boost.MPI to get C++ bindings of MPI.
Rewrite to use the C interface.
Improve cmake open-mpi detection to check for C++ binding presence

See Also:
see: https://raw.githubusercontent.com/open-mpi/ompi/v4.0.x/NEWS
Comment 1 Koichi Murakami 2020-03-02 16:55:17 CET 
We keep finding a solution for using MPI-3 and other MPI tools.
We are lack of manpower to explore the issue more so far.
Te issue is pending for a while.