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OpenCoarrays

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Overview | Downloads | Compatibility | Prerequisites | Installation | Getting Started | Contributing | Status Support | Acknowledgments | Donate

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Overview

OpenCoarrays supports the GNU Compiler Collection (GCC) Fortran compiler (gfortran) by providing a parallel application binary interface (ABI) that abstracts away the underlying communication library. OpenCoarrays thus enables gfortran to support Fortran's parallel programming features, often called "Coarray Fortran," without making direct reference to the back-end communication library: the Message Passing Interface (MPI). This ensures that Fortran programs and Fortran compilers may take advantage of other communication libraries without costly refactoring. Work is underway on the Caffeine project to support alternative communication libraries and alternative compilers by defining a compiler-independent parallel ABI atop the GASNet-EX exascale networking middleware.

OpenCoarrays provides a compiler wrapper (caf), a parallel runtime library (libcaf_mpi), and a program launcher (cafrun). The wrapper and launcher provide a uniform abstraction for compiling and executing Coarray Fortran without direct reference to the underlying MPI layer.

Downloads

Please see our Releases page.

Compatibility

The OpenCoarrays ABI was adopted by gfortran in release the GCC 5.1.0 release and gfortran continues to work with OpenCoarrays as of this writing.

Prerequisites

Building OpenCoarrays requires

If you use a package manager or the OpenCoarrays installer, any missing prerequisites will be built for you.

Installation

Please see the INSTALL.md file.

Or try OpenCoarrays online as a Jupyter notebook kernel using Binder with no downloads, configuration or installation required. The default index.ipynb notebook is read only, but you can execute it, copy it to make changes, or create an entirely new CAF kernel notebook.

Packaged Version

If you would like to be able to install OpenCoarrays through your favorite package manager, please ask them to add it, or contribute it yourself. If you see your favorite package manager has an outdated version, please ask them to update it, or contribute an update yourself.

Packaging status

Getting Started

To start using OpenCoarrays, please see the GETTING_STARTED.md file.

Contributing

Please see the CONTRIBUTING.md file.

Status

A list of open issues can be viewed on the issues page.

Support

Please submit bug reports and feature requests via our Issues page.

Acknowledgments

We gratefully acknowledge support from the following institutions:

Donate

If you find this software useful, please consider donating your time or your money to aid in development efforts.


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