Calling an external command from a Haskell program

[Simon Marlow]

> In local.libraries, you wrote:
> > The sticking point is that GHC needs a
> > thread-safe wait() implementation, which means some hacking in the
> > scheduler (there isn't even a good way to do this portably, because
> > select() doesn't let you wait for process termination).
> 
> *mumbl* libevent *mumbl*

I checked libevent, and it doesn't support wait() events.  It would be
great if it did...

Cheers,
	Simon