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Configuring an OCaml project

Define a SDK​

The SDK is used to locate the binary files of the OCaml installation.

First, open the project settings (File | Settings), and go to Languages & Frameworks | OCaml/Reason:

Locate your ocaml installation, it should be the .opam directory in your home.

On Windows, if you're using a WSL or a Cygwin installation, it should be detected by the plugin:

Cygwin

When opam location is set, switches are listed.

Cygwin

When you select a switch, the installed libraries should be listed.

Sources​

The plugin works at the source level: when you validate your SDK configuration, a popup with detected sources will appear:

Add sources

You can exclude files you don't want completion for

Structure​

The selected SDK should be displayed as an external library:

project SDK

Technically, the switch is added as a module library: this will automatically index the sources.

project SDK

This module is always defined, but only visible in major IDE (IC/IU).