MPI_Ada

A small research project for OpenMPI and MPICH bindings written in pure Ada.

TODO

• Add more data types and their handles
• More useful functions like gather and scatter

Getting it

alr with --use=https://github.com/codendonut/mpiada

Choosing a driver

Modify your alire.toml

[configuration.values]
mpiada.MPI_Vendor = "openmpi"

or

[configuration.values]
mpiada.MPI_Vendor = "mpich"

Building with it

Add the following to your GPR file (or something similar):

package Linker is
   for Required_Switches use external_as_list ("MPI_LINKER_FLAGS", " ");
end Linker;

MPICH

run the following using the environment variable defined earlier:

export MPI_LINKER_FLAGS="$(pkgconf --libs mpich)"
alr clean && alr build

OpenMPI

run the following using the environment variable defined earlier:

export MPI_LINKER_FLAGS="$(pkgconf --libs ompi-c)"
alr clean && alr build

Using it

See tests/src/tests.adb for an example

Additional Notes

There is a bug in MPICH in Ubuntu-24 that requires it to be launched via mpirun.openmpi instead of the one packaged with mpich.