installing two instances of OpenMC

User Support
1

Hi,

I am using OpenMC which I installed without MPI option. Now I would like to install another instance of OpenMC with MPI option. I would like to preserve the first installation and name the mpi version differently, such as ‘openmcmpi’.

Is it possible to do that?

Thanks!

2

Assuming you are building from source, what you can do is use a different CMAKE_INSTALL_PREFIX for the MPI version at the time you’re running cmake. For example,

export FC=mpif90
export CC=mpicc
export CXX=mpicxx
cmake -DCMAKE_INSTALL_PREFIX=/opt/openmc-mpi/ …

The executable will still be named ‘openmc’ but it will exist in a different directory.

Best regards,
Paul