Supported MPI libraries

[ivan-pi]

I noticed there is a version constraint MPICH_NUMVERSION > 40200000. Is this a hard constraint?

This rules out Intel MPI which exports the constant with a value of 30400002.

[jeffhammond]

I'm using an MPICH extension for noncontiguous subarrays that requires that version. If you don't have it, I don't think everything works, but what doesn't work isn't used by anybody, so it's safe.

[ivan-pi]

So if I get rid of the procedures using,

vapaa/source/cfi_util.c

Line 49 in 80b8d1b

static void * VAPAA_CREATE_MPIX_IOV(MPI_Datatype dt, size_t * total_len, size_t * total_bytes)

that uses MPIX_Type_iov, it should work in principle?

(Btw, is it possible you share your PASC slides about vapaa?)

[jeffhammond]

Yeah I can share slides. I'll upload here tomorrow.

[jeffhammond]

Hammond MPI Fortran PASC24 post.pdf
@ivan-pi slides here

[jeffhammond]

So if I get rid of the procedures that uses MPIX_Type_iov, it should work in principle?

Yes, you can add some preprocessor stuff and it will work for all MPI, but if you do unreasonable things that require MPICH 4+, then it will fail.