[Beowulf] MPI ABI
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Joachim Worringen joachim at ccrl-nece.deMon Oct 10 02:21:47 PDT 2005
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Toon Knapen wrote: > Thus AFAICT if my app uses the fortran interface of MPI I can link my > app with a dynamic library (say libmpi.so) which I can make point to > either e.g. an MPICH implementation or POE. right? Wrong - i.e., the value of MPI_COMM_WORLD is not defined in Fortran, either. This won't work if one MPI implementation sets MPI_COMM_WORLD to 35 and another expects 626. Of course, you are right for opaque datatypes like MPI_Group, but this is not sufficient for an ABI. Joachim -- Joachim Worringen - NEC C&C research lab St.Augustin fon +49-2241-9252.20 - fax .99 - http://www.ccrl-nece.de
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