Hi, no you do not.
FWIW, MPI C++ bindings were removed from the standard a decade ago. mpicc is the wrapper for the C compiler, and the wrappers for the C++ compilers are mpicxx,mpiCC and mpicxx. If your C++ application is only using the MPI C bindings, then you do not need --enable-mpi-cxx for the C++ wrappers to work. But if your C++ application is using the MPI C++ bindings, you should consider modernizing it (plain C bindings, or other C++ abstractions such as Boost.MPI or Elementals for example) Cheers, Gilles On Wed, May 13, 2020 at 1:00 PM Konstantinos Konstantinidis via users <users@lists.open-mpi.org> wrote: > > Hi, > I have a naive question. I have built Open MPI 3.1.6 on my system after > configuring as follows: > ./configure --prefix=/usr/local > > I am planning to use Python so I want to build MPI4py 3.0.3 which will be > using the Open MPI implementation. The MPI4py requirements here state that > "If you use a MPI implementation providing a mpicc compiler wrapper (e.g., > MPICH, Open MPI), it will be used for compilation and linking. This is the > preferred and easiest way of building MPI for Python." > > So I am wondering whether I need the C++ bindings (if still supported in Open > MPI), i.e., does mpicc needs Open MPI to be configured with > "--enable-mpi-cxx" for MPI4py to work? > > I won't be coding in C++ at all. > > Thanks, > Konstantinos Konstantinidis > >
