[MPICH] Linking difficulty

[David Ashton]

Support from both Absoft and Visual Numerics contacted me stating that IMSL
for Windows does not support MPI.
-David Ashton

-----Original Message-----
From: owner-mpich-discuss at mcs.anl.gov
[mailto:owner-mpich-discuss at mcs.anl.gov] On Behalf Of Jon Huntley
Sent: Monday, June 20, 2005 9:44 AM
To: mpich-discuss at mcs.anl.gov
Subject: [MPICH] Linking difficulty

I apologize if this is a really stupid question, but I am quite the novice
programmer.

So I have a simulation that I'm compiling with Compaq Visual Fortran 6.6.0
in Windows XP, and I've been asked to see if I can make it run faster with
parallel processing.  So I've installed MPICH2, followed all of the
instructions in the readme, and made a nice little test run of my program in
Windows on a single processor machine where I bounce messages back and forth
between processes.  To me, this is really nifty.

The problem is that this only works in the Debug mode.  If I use the Release
mode (which is about twice as fast for this program without MPI, so this is
a serious concern), I get all manner of linker errors, although compiling
always seems to go through error free.  For example, I get:
LINK : warning LNK4089: all references to "fmpich2.dll" discarded by
/OPT:REF

So I choose /OPT:NOREF and I get the following error upon execution:
FATAL ERROR 1 from MPI_INIT.  A CALL was executed using the IMSL dummy
routine.  Parallel performance needs a functioning MPI library.

Furthermore, if I include calls to the subroutines MPI_SEND and MPI_RECV, I
unavoidably get the error (/OPT:NOREF doesn't get me past this):
Model.obj : error LNK2001: unresolved external symbol _MPI_SEND at 32
Model.obj : error LNK2001: unresolved external symbol _MPI_RECV at 36

I've tried copying all of the libraries I know about into the program
directories, I've tried all of the switches and options I know about (going
through and comparing diligently the options under the Debug and Release
modes), and I can't seem to find anything.  Does anybody have any
suggestions on some things to try, or any ideas on what I'm doing wrong?  

Thanks,
Jon