> xsrc/xc4
> xsrc4/xc
> 
> I tend to use xsrc/xc4, where xc4 wouldn't contain an extra xc directory
> so you have to take care when you do import, but I think thats reasonable.

Hmm, how about xsrc/xf4 rather than xsrc/xc4?

Because "xc" is acronym of X Consortium, the version number 4 seems
to be not suitable for "xc".
--
soda