bug#20968: 25.0.50; Be able to specify the output directory for `byte-compile-file'

[Drew Adams]

> > > > But AFAIK, the behavior is well-defined.
> > >
> > > It's well-defined only for the current behavior, where the *.el
> > > and the corresponding *.elc files live in the same directory.
> >
> > How so?  Please give a concrete example where it is not well-
> > defined for a foo.el and a foo.elc that are in different
> > directories.  Explain what problems you think arise in such a case.
> 
> I already did that: we search load-path linearly, only once, looking
> for .el and .elc files in each directory.

And the problem with that is...?

> > Can you please point out just what the problems are?
> 
> Sorry, don't have all that time.

Then let's please move along.