On Mon, Mar 21, 2016 at 1:37 PM, Brian Dobbins <bdobb...@gmail.com> wrote:
> > Hi Jeff, > > On Mon, Mar 21, 2016 at 2:18 PM, Jeff Hammond <jeff.scie...@gmail.com> > wrote: > >> You can consult http://meetings.mpi-forum.org/mpi3-impl-status-Mar15.pdf >> to see the status of all implementations w.r.t. MPI-3 as of one year ago. >> > > Thank you - that's something I was curious about, and it's incredibly > helpful. Some places seem to not update their libraries terribly often, > perhaps for stability/reproducibility reasons, and one of the primary > systems I'm using still has an MPI2 library as the default. I suspected, > but hadn't known, that MPI3 versions were already widely available. Anyone > else still have an MPI2 library as the default on their systems? > > If you want to support IBM Blue Gene MPI and Fujitsu MPI, you should verify MPI-3 support there. Every other machine I know about has the ability to support MPI-3. Calling from C code is another workable but less-than-elegant solution, > since not everyone knows C, even the basics of it, plus it adds a bit of > complexity. I think maybe I'll just plan on 'expecting' MPI3 and using > macros to tackle the edge-case of MPI2/2.1. > > Sure, but more people know C than Fortran :-) > Still, I wish there was an automatic -DMPI_VERSION=30 flag (or something > similar) added implicitly by the MPI command line. Maybe, since > MPI_VERSION and MPI_SUBVERSION are taken, an MPI_FEATURES one (eg, > -DMPI_FEATURES=30, combining version and subversion)? I guess it's rarely > needed except in situations where you have new codes on older systems, > though. > > This is a great feature suggestion for the MPI Fortran compiler wrapper scripts. The behavior of these scripts is not standardized, but if Open-MPI and MPICH support this, that's pretty close to standardized :-) Jeff > Any other perspectives on this? > > Cheers, > - Brian > > > _______________________________________________ > users mailing list > us...@open-mpi.org > Subscription: http://www.open-mpi.org/mailman/listinfo.cgi/users > Link to this post: > http://www.open-mpi.org/community/lists/users/2016/03/28780.php > -- Jeff Hammond jeff.scie...@gmail.com http://jeffhammond.github.io/
