perfect, thanks!
On 03/13/2013 12:21 PM, Jeff Squyres (jsquyres) wrote:
Fair point; the "don't do that" aspect of changing compilers with middleware is
exactly the type of information that you want to be able to google for. I've added the
following paragraph to the FAQ entry
http://www.open-mpi.org/faq/?category=mpi-apps#override-wrappers-after-v1.0:
-----
Note that changing the underlying compiler may not work at all. For example,
C++ and Fortran compilers are notoriously binary incompatible with each other
(sometimes even within multiple releases of the same compiler). If you
compile/install Open MPI with C++ compiler XYZ and then use the OMPI_CXX
environment variable to change the mpicxx wrapper compiler to use the ABC C++
compiler, your application code may not compile and/or link. The traditional
method of using multiple different compilers with Open MPI is to install Open
MPI multiple times; each installation should be built/installed with a
different compiler. This is annoying, but it is beyond the scope of Open MPI to
be able to fix.
-----
On Mar 13, 2013, at 5:44 AM, Dominik Goeddeke
<dominik.goedd...@math.tu-dortmund.de> wrote:
Yes, sure. My point is just that "strongly discouraged" (as per the FAQ) is different from "simply
will not work at all". I find that a bit confusing, especially since in other areas of the FAQ, explicit
workarounds are stated, e.g. on how to build a Makefile rule to extract flags from an mpiwrapper to pass them to the
compiler manually (which is in exactly the same way "strongly discouraged". Maybe adding something like
"is strongly discouraged and may not even work in certain cases, especially with Fortran" can help.
Dominik
On 03/13/2013 11:37 AM, Paul Kapinos wrote:
AFAIK the GNU people change the Fotran Module syntax every time they get any
chance for doing it :-(
So openmpi compiled with 4.4.6 (sys-default for RHEL 6.x) definitely does not
work with 4.5, 4.6, 4.7 versions of gfortran.
Intel 'ifort' compiler build modules which are compatible from 11.x through
13.x versions.
So, the recommended solution is to build an own version of Open MPI with any
compiler you use.
Greetings,
Paul
P.S. As Hristo said, changing the Fortran compiler vendor and using the
precompiled Fortran header would never work: the syntax of these .mod files is
not standatised at all.
On 03/13/13 11:05, Iliev, Hristo wrote:
However, it works if for example you configure Open MPI with the system supplied
version of gfortran and then specify a later gfortran version, e.g.
OMPI_FC=gfortran-4.7 (unless the module format has changed in the meantime).
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--
Jun.-Prof. Dr. Dominik Göddeke
Hardware-orientierte Numerik für große Systeme
Institut für Angewandte Mathematik (LS III)
Fakultät für Mathematik, Technische Universität Dortmund
http://www.mathematik.tu-dortmund.de/~goeddeke
Tel. +49-(0)231-755-7218 Fax +49-(0)231-755-5933
_______________________________________________
users mailing list
us...@open-mpi.org
http://www.open-mpi.org/mailman/listinfo.cgi/users
--
Jun.-Prof. Dr. Dominik Göddeke
Hardware-orientierte Numerik für große Systeme
Institut für Angewandte Mathematik (LS III)
Fakultät für Mathematik, Technische Universität Dortmund
http://www.mathematik.tu-dortmund.de/~goeddeke
Tel. +49-(0)231-755-7218 Fax +49-(0)231-755-5933
