Version 4.9 is available upstream. Please consider updating!
It seems that version 4.9 is available upstream, while the latest version in the Gentoo tree is 2.0. You think this warning is false? Read more about it here.
The New OPeNDAP C API (oc) is an OPeNDAP DAP 2.0 client implementation
written in generic C. This new API allows for more funcionality and
less complexity than the original C API.