X 4.3 equivs

[Piero <ludovico.ariosto@wanadoo.fr>]

I compiled, just for th fun of doing it once, X 4.3. Now I shoud build 
the equivs files for apt.
I suppose I have to download the equivs package.
And then: which equivs should I build? Please: do not bother to tell me 
a detaild list. Just tell me: how can I know which equvs should be builded?