Parallel sum function

[vmagnin]

See that very recent post:

Using coarrays in a shared library (OpenCoarrays)

Suppose I wanted to make a shared library exposing a C interface via bind(C), and use that library from a language other than Fortran, but use OpenCoarrays within the library. Does anybody know how I could accomplish this? I gather that I have to call _gfortran_caf_init() and the associated finalization routine, but would I have to execute the program that uses that library by using cafrun / mpiexec? I’d love to hear from anyone who has experience with or knowledge about this. Thanks.

Note that the term Coarrays can be used to talk about coarrays themselves, but is also often used as a more generic term to talk about all the parallel features introduced by Fortran 2008/2018, like the collective subroutines.