Stuck with getting Cuberite to compile on FreeBSD

[bearbin]

I am working on getting a FreeBSD build set up, and everything works so far, apart from that clang emits a load of errors and refuses to build.

Here's a build log: http://builds.cuberite.org/job/Cuberite%.../8/console

Does anybody have an idea of what I need to change to make the build work?