BSDulator?

[Stephen Hurd]

Rather than build and maintain a cross toolchain to build Linux 
binaries, it was much simpler to merely install 
emulators/linux_dist-gentoo-stage3.  Since I also build OpenBSD and 
NetBSD binaries, the obvious question came to mind "Why does FreeBSD not 
have BSDulators?"

A cursory poke around suggests that it should be relatively simple to do 
since the ABIs between the BSDs are generally a lot closer to each other 
than the ABIs between FreeBSD and Linux.

Has anyone done any work in this area, and if not, does anyone have any 
pointers regarding how to get started on this?