I was wondering where you get the kfreebsd-kernel-headers from, it seems to have files that I can't find anywhere, and I can't find any url as to where it is from.
From source package kfreebsd-kernel-headers, see SVN
http://svn.debian.org/wsvn/glibc-bsd/trunk/kfreebsd-kernel-headers/ It also Build-Depends on kfreebsd-source-8.0. Petr