I submitted a port of OpenCoarrays: https://bugs.freebsd.org/bugzilla/show_bug.cgi?id=217283 under lang category. To build: 1. Add DEFAULT_VERSIONS=gcc=6 (or higher) to /etc/make.conf. 2. Rebuild/reinstall net/mpich. Then can build lang/OpenCoarrays. Try "make check" - should pass all tests. Grateful for any feedback Anton