Version 4.1.5-1 of packages libopenmpi-devel libopenmpi40 libopenmpifh40 libopenmpiusef08_40 libopenmpiusetkr40 openmpi are available in the Cygwin distribution: CHANGES Latest upstream release of 4.1.x series https://www.mail-archive.com/announce@lists.open-mpi.org/msg00155.html Full upstream changes: https://github.com/open-mpi/ompi/blob/master/NEWS CYGWIN NOTES openmpi works better with a running cygserver DESCRIPTION Open MPI : A High Performance Message Passing Library The Open MPI Project is an open source MPI-3 implementation that is developed and maintained by a consortium of academic, research, and industry partners HOMEPAGE http://www.open-mpi.org/ Marco Atzeri If you have questions or comments, please send them to the cygwin mailing list at: cygwin (at) cygwin (dot) com .