osabi and x11-links: for NetBSD only, or other (quasi-)Unixes also?

["Thomas Mueller" <mueller6724%bellsouth.net@localhost>]

When I tried to build links-gui after updating from NetBSD 5.1_RELEASE to 
STABLE, I was quickly stopped by having the wrong osabi (NetBSD-5.1) with 
appropriate eror message about osabi.  So I updated osabi and subsequently had 
to update x11-links as well but haven't got to building links-gui again.

My question is whether this osabi is for NetBSD only or for other 
(quasi)-Unixes too, such as Linux and the other BSDs, Solaris, AIX, etc.  I 
couldn't find anything like osabi and x11-links in FreeBSD ports collection or 
for Linux.


Tom