On Wed, Feb 14, 2018 at 4:08 PM, Tim Leonard wrote: > Thanks, Xavier. Yes, I have X11 installed. > Is it in a "standard" location? The configure script will consider the paths listed here: https://github.com/ocaml/ocaml/blob/1d20e28d987e03d7023ce565d38b02a8167ce63d/configure#L1683