[jhc] flag to compile a single module?

[David Roundy]

I was just thinking that it would be great jhc would compile just a
single module (and its dependencies, of course) when that module was
requested (instead of complaining about a lack of a main function).
This would be handy for testing, but also could enable parallel
builds, assuming that jhc won't trash the ho cache if two builds are
run simultaneously (which is important anyhow... e.g. if building two
versions of the same code at the same time).

I'm imagining one could just request either a module or a hs file:

jhc Foo.Bar

or

jhc Foo/Bar.hs

Or am I missing something and is this already possible?

David