[Patch, Fortran, 4.7] PR 18918 - Add initial support for a coarray communication library

[Tobias Burnus]

Hi Ralf,

Ralf Wildenhues wrote:
> Some MPI implementations require that the thread that called MPI_Init
> also calls MPI_Finalize.  How can this be ensured in this case?

Well, the front-end only calls (via the wrapper) MPI_Finalize for STOP 
and at the end of the main program. However, the end of the main program 
cannot be present if the main program is not in Fortran - and if the 
main program is written in Fortran, it will be MPI_Init. And in case of 
STOP, if the program exits, there is no chance to leave invoke 
MPI_Finalize of the original thread. (STOP is the normal termination, 
ERROR STOP is the error termination.) Thus, I think the code is OK.

Thanks for scrutinizing at the code.

Tobias