OCaml and Opam: unbound module Core

ocaml, opam

Solution

So I jumped the gun a bit. I forgot to add some items to my ~/.ocamlinit file. Specifically I forgot to add

#use "topfind"
#camlp4o
#thread
#require "core.top"
#require "core.syntax"

as mentioned in Chapter 1. D'oh!

Problem

I'm trying to get an OCaml environment set up, and I've followed the instructions from appendix A of the Real World OCaml beta. I set up opam, and installed a version of OCaml with the command ``` $ opam switch 4.01.0dev+trunk ``` which passed fine. I then did an ``` $ eval `opam config env` ``` to pull in the changes. I'm running the correct top level, as ``` $ which ocaml ``` outputs ``` /home/bryan/.opam/4.01.0dev+trunk/bin/ocaml ``` I installed the Core package from Jane street, with the command ``` $ opam install core ``` Both ocamlfind and opam search show that the package was installed correctly. However when I try to open it either from the repl or in a file, I get the error 'unbound module Core'. e.g. ``` $ ocaml # open Core;; Error: Unbound module Core ``` Is there something I'm missing here? Why can't OCaml find my installed module?

Original source