To use use the OpenMPI compilers (mpicc, mpic++, etc.) and mpirun on Fedora, you’ll need to install the openmpi package as well as set up the envionrment paths correctly.

To install:

sudo dnf install openmpi openmpi-devel

Then to set up the environmental variables correctly so that PATH is set. You’ll need to use the environment modules program installed by default on Fedora. First, you’ll need to source it:

source /etc/profile.d/modules.sh

Now you can load in the OpenMPI module

module load mpi/openmpi-x86_64

Finally, with these changes you can use the compiler tools and runner. Do note that you’ll have to source and load the OpenMPI module for every shell you open unless you add it within $HOME/.bashrc.