cross compiling freebsd-head is sigh, now broken - thanks libllvm

[Ed Maste]

On 19 March 2017 at 03:00, Adrian Chadd <adrian at freebsd.org> wrote:
> gcc version 5.3.0 (FreeBSD Ports Collection for mips)
>
> ... so uhm, why are we building libllvm?

As of the Clang 4.0.0 import we build Clang by default, on all
architectures other than those unsupported by Clang, if the
cross-compiler supports C++11.

I'm not sure if the issue you encountered here is in libllvm or GCC.
For now though you can set WITHOUT_CLANG and WITHOUT_CLANG_FULL in
/etc/src.conf.