Thanks Ivan, I commented out those offending lines and with gmake all is 
good as far as I can tell. 

Ivan Popov writes: 

> Hello Matt, 
> 
> I am not familiar with FreeBSD-packages, so from my point of view it is
> general C-hacking that applies - it probably would help to comment out the
> offending declarations from
> /usr/home/matthewh/dist/src/coda-5.3.19/include/coda.h 
> 
> YMMV as usual :-)