pathmap semantics issues

[Michael Snyder]

David Taylor wrote:
> 
> Okay, here's some questions concerning how pathmap should behave:
> 
> . should it translate all paths?  Or just some paths?  If some, which?
> Source paths?  Others?  That is, should it be consulted when looking
> for sources?, objects?, executables?, and shared objects?
> 
> . should it be searched instead of the existing path?  Or in addition?
> If in addition, which should be searched first?


I hope it won't interfere with the path for searching for 
shared libraries.  I've just spent some effort sanifying that...