FWIW, we always encourage you to use the same compiler to build Open MPI and
your application.
Compatibility between gcc and Intel *usually* works for C and C++, but a)
doesn't work for Fortran, and b) there have been bugs in the past where C/C++
compatibility broke in corner cases. My $0.02: avoid these issues if you can
and just have multiple installations of Open MPI.
See the FAQ for how to modify the wrapper compilers:
https://www.open-mpi.org/faq/?category=mpi-apps#override-wrappers-after-v1.0
> On Sep 18, 2017, at 4:21 PM, n8tm via users <users@lists.open-mpi.org> wrote:
>
> On Linux and Mac, Intel c and c++ are sufficiently compatible with gcc and
> g++ that this should be possible. This is not so for Fortran libraries or
> Windows.
>
>
>
>
>
>
> Sent via the Samsung Galaxy S8 active, an AT&T 4G LTE smartphone
>
> -------- Original message --------
> From: Michael Thomadakis <drmichaelt7...@gmail.com>
> Date: 9/18/17 3:51 PM (GMT-05:00)
> To: users@lists.open-mpi.org
> Subject: [OMPI users] Question concerning compatibility of languages used
> with building OpenMPI and languages OpenMPI uses to build MPI binaries.
>
> Dear OpenMPI list,
>
> As far as I know, when we build OpenMPI itself with GNU or Intel compilers we
> expect that the subsequent MPI application binary will use the same compiler
> set and run-times.
>
> Would it be possible to build OpenMPI with the GNU tool chain but then
> subsequently instruct the OpenMPI compiler wrappers to use the Intel compiler
> set? Would there be any issues with compiling C++ / Fortran or corresponding
> OMP codes ?
>
> In general, what is clean way to build OpenMPI with a GNU compiler set but
> then instruct the wrappers to use Intel compiler set?
>
> Thanks!
> Michael
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--
Jeff Squyres
jsquy...@cisco.com
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