Richard Stallman wrote:
>     AFAIK the main missing thing is that the Windows and Mac ports
>     probably don't even compile, they have not been kept up to date with
>     the rest of the changes. It shouldn't be too hard for someone that
>     knows those platforms to fix this.
> 
> This is the sort of issue I was hoping to find out about.  There may
> be other such gaps in places that the current users won't run across.
> To install the multi-tty feature, we need to fill in the gaps.
> 
> Can someone please enter this in a special TODO in the multi-tty branch?

The porting issue is already explained in its TODO list.

-- 
Károly