[mpich-discuss] Why do predefined MPI_Ops function elementwise in MPI_Accumulate, but not in MPI-1 routines?

[Dave Goodell]

On Apr 24, 2012, at 1:04 PM CDT, Jed Brown wrote:

> On Tue, Apr 24, 2012 at 12:57, Dave Goodell <goodell at mcs.anl.gov> wrote:
>> 
>> Out of curiosity, how do you feel about just cheating a bit and using MPI_C_DOUBLE_COMPLEX for this particular use case?  Do you believe the risk of some sort of mismatch between C's _Complex and std::complex to be too great?
> 
> We tried to do this, but learned that MPI_C_DOUBLE_COMPLEX was floating around in mpi.h just to trick our configure tests (since it fails at run-time on Windows) and the bug report was closed by you as INVALID.

Ahh, yes, the Windows-is-broken issue.  Ignore me, I had paged this ticket out of my brain when writing the above email.

-Dave