datkin / ocaml-examples

Examples of building ocaml code and using ocaml tools.

ocaml-examples

Examples of building ocaml code and using ocaml tools.

opam

Make a new environment in opam

$ opam switch install <environment name of your choice> -alias-of <compiler name>
$ eval $(opam config env)

Switching between environments

$ opam switch <env name> && eval $(opam config env)

Checking out package source

$ opam source <package name>

This will just checkout the code at whatever revision would be built by default for your ocaml version.

Install from source

First, tell opam where to look for the package:

$ opam pin <package name> <path>

You'll be prompted to install now. You can later run:

$ opam install <package name>

Or you can rebuild following a change with:

$ opam update <package name>

Adding a compiler

I'm not sure there's a way to add a "local" compiler definition. I think you need to make your own local opam repository and define the compiler there.

1. Make your repo and add some definitions. I copied a compiler definition from the prop repos, and modified it slightly.

2. Register the repo with opam. I think I used local for .

   $ opam repo add <name> <path>
   

3. Now you can access the compiler you defined there.

4. If you change anything in the repo, you can update the opam update.