general dependency questions

[Anders F Björklund]

> Also, the portfile for grace has the following dependency line:
> depends_lib             lib:libX11.6:XFree86 \
>
> X11 for Leopard provide X11R7 (instead of 6) and is based on xorg, not 
> XFree86.  But, I know that macports grace works in Leopard.  So I'm 
> wondering, how exactly is that line parsed?  How badly malformed would 
> it have to be, before macports tries to compile XFree86 itself or just 
> refuses to install?

Leopard's X11 still uses libX11.6, even though being /usr/X11/ and 
X.org based

--anders