Version 4.13.2 is available upstream. Please consider updating! It seems that version 4.13.2 is available upstream, while the latest version in the Gentoo tree is 3.5.2-r3. You think this warning is false? Read more about it here.
This package needs a new maintainer! If you are interested in helping with the maintenance of antlr-c, please get in touch with our Proxy Maintainers team.