[Mimedefang] 2.71 not compiling on FreeBSD 6.4

[Kitione Lalakomacoi]

On Tue, Feb 15, 2011 at 1:00 AM, David F. Skoll <dfs at roaringpenguin.com>
> > mimedefang.o(.text+0x3292): In function `eom':
> > ./mimedefang.c:1887: undefined reference to `smfi_chgfrom'
> > milter_cap.o(.text+0x13): In function `milter_version_ok':
> > ./milter_cap.c:37: undefined reference to `smfi_version'
> > *** Error code 1
>
> The header files for libmilter don't match the actual version of the milter
> library you have installed.  (The headers are newer.)

OK, dumb question alert - how do we fix this? I've never installed
libmilter (its always just been there with every box I've ever used.