On Mon, Oct 26, 2015 at 10:21 AM, Hendrik Boom <hendrik@topoi.pooq.com>
wrote:

> On Mon, Oct 26, 2015 at 01:35:45PM +0000, Soegtrop, Michael wrote:
> > Dear Ocaml Users,
> >
> > I just wanted to ask, if this is the right place to discuss camlp5, or
> if there is a better place. I have a rather bizarre build issue on Cygwin
> and a fix (well a hack) for it.
>
> Now I've heard about campl5, presumably a successor to campl4, and about
> ppx, touted as a successor to camlp4.
>
> What gives here?
>

The 2nd paragraph here [1] clarifies it a bit:

[1] http://ocaml.org/learn/tutorials/camlp5.html