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Asked: 2026-06-11T06:17:52+00:00

I need to add the csv module in one module compute.ml of an OCAML

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I need to add the csv module in one module compute.ml of an OCAML package.(see discussion ocaml hash from mysql)

Do you know of a simple way to amend the makefile (it is a complex document in my case and I don’t think that I can fully rewrite it or switch to ocamlfind install) to enable a compilation without “Unbound value Csv.load” error messages?

ie can I include a new library inside an existing stable Ocaml package?

modified module : compute.ml,

modification;

 let data = Csv.load ("foo.csv")
         ....

error message during compilation :

camlp5r ../wserver/pa_macro5.cmo -DUNIX -o compute.ppo compute.ml
ocamlopt.opt -warn-error A -I ../wserver -I ../sally -I +camlp5 -c -impl compute.ppo
File "compute.ml", line 110, characters 13-21:
Error: Unbound value Csv.load

Thanks for help

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1 Answer

  1. Editorial Team

    You have to tell ocamlopt where to look for csv.cm{i,x} files with the appropriate -I option, like the ones you already have at the end of your command line.
    If the library lies in a subdirectory of OCaml’s standard library (as given by ocamlc -where), you can use
    -I +csv_dir, as is done for camlp5 in your example. Otherwise, you’ll have to provide the full path.

    Note that this is not the only modification that you’ll have to do: you’ll also have to add csv.cmx (or .cmxa) on the command line that perform the final link of your application/library.

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