Following along in Chapter 1 of RWO, I get to the final program:
open Core let rec read_and_accumulate accum = let line = In_channel.input_line In_channel.stdin in match line with | None -> accum | Some x -> read_and_accumulate ( accum +. Float.of_string x ) let () = printf "Total: %F\n" (read_and_accumulate 0.)
I have Core successfully installed via opam, but when I try to compile it using corebuild I get:
corebuild sum.native ocamlfind ocamlopt -linkpkg -g -thread -package core sum.cmx -o sum.native + ocamlfind ocamlopt -linkpkg -g -thread -package core sum.cmx -o sum.native File "_none_", line 1: Error: No implementations provided for the following modules: Stdio__ referenced from sum.cmx Core_kernel__ referenced from sum.cmx Command exited with code 2. Hint: Recursive traversal of subdirectories was not enabled for this build, as the working directory does not look like an ocamlbuild project (no '_tags' or 'myocamlbuild.ml' file). If you have modules in subdirectories, you should add the option "-r" or create an empty '_tags' file. To enable recursive traversal for some subdirectories only, you can use the following '_tags' file: true: -traverse <dir1> or <dir2>: traverse
Any ideas on how to proceed? I am running OCaml v4.06.1 with Core v0.10.0 on RHEL 7.4 with opam v1.2.2.