Sorry for the ginormous delay in replying here; I blame SC'10, Thanksgiving, 
and the MPI Forum meeting last week...


On Nov 29, 2010, at 2:12 PM, David Robertson wrote:

> I'm noticing a strange problem with Open MPI 1.4.2 on Mac OS X 10.6. We use 
> both Intel Ifort 11.1 and gfortran 4.3 on the same machine and switch between 
> them to test and debug code.
> 
> I had runtime problems when I compiled openmpi in my usual way of no shared 
> libraries so I switched to shared and it runs now.

What problems did you have?  OMPI should work fine when compiled statically.

> However, in order for it to work with ifort I ended up needing to add the 
> location of my intel compiled Open MPI libraries (/opt/intelsoft/openmpi/lib) 
> to my DYLD_LIBRARY_PATH environment variable to to get codes to compile 
> and/or run with ifort.

Is this what Intel recommends for anything compiled with ifort on OS X, or is 
this unique to OMPI-compiled MPI applications?

> The problem is that adding /opt/intelsoft/openmpi/lib to DYLD_LIBRARY_PATH 
> broke my Open MPI for gfortran. Now when I try to compile with mpif90 for 
> gfortran it thinks it's actually trying to compile with ifort still. As soon 
> as I take the above path out of DYLD_LIBRARY_PATH everything works fine.
> 
> Also, when I run ompi_info everything looks right except prefix. It says 
> /opt/intelsoft/openmpi rather than /opt/gfortransoft/openmpi like it should. 
> It should be noted that having /opt/intelsoft/openmpi in LD_LIBRARY_PATH does 
> not produce the same effect.

I'm not quite clear on your setup, but it *sounds* like you're somehow mixing 
up 2 different installations of OMPI -- one in /opt/intelsoft and the other in 
/opt/gfortransoft.

Can you verify that you're using the "right" mpif77 (and friends) when you 
intend to, and so on?

-- 
Jeff Squyres
jsquy...@cisco.com
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