Automatic dependency tracking

[Stan Shebs]

Daniel Jacobowitz wrote:
> Option two: we could require GNU make.  GCC has done this for years,
> but binutils does not; it may be premature.
>   
I think requiring GNU make is pretty safe at this point; it's 
preinstalled on most (all?) modern systems, we've scrubbed out a lot of 
ancient hosts, and if people really want to build on something old, 
getting GNU make is going to be among the easier of their tasks.

Stan