Should "dir" override the full path encoded in debug info?

[Eli Zaretskii]

> Date: Sat, 24 Jun 2006 21:07:15 -0700
> From: Joel Brobecker <brobecker@adacore.com>
> 
> Any suggestion on the name of that new command and its
> syntax. Something like this?
> 
>         (gdb) rewrite-source-path old-pattern new-pattern
> 
> Or rewrite-source-dir.

I think there's no need to mention `source', since `dir' doesn't,
either.  So how about `subst-dir' or `alt-dir'?