Now I've checked in the buildlink3 changes into the repository.  This
is very simple & straightforward.  I don't expect too much troubles
but please let me know if you see any.

Now I want to reduce build speed.  Build takes somewhat long time in,
maybe, creating all *.el / *.elc symbolic links of Emacs's.  One idea
would be using a directory symbolic link instead of files.  I have not
tried though.

Masao