Build-time dependencies

[Stefan Monnier]

> The dependencies absolutely must be generated automatically.  Whether
> this should be done by the byte-compiler or a separate script isn't clear
> (yet).  Such a separate script could probably be run in temacs, creating
> the dependencies very early in the build process.

I think it should be easy to generate the dependencies from bytecomp.el
(just record macros as we expand them, and then try and figure out
which file they come from).  This way they could be kept uptodate
100% automatically.


        Stefan