Simple Example where Ocaml calls a C function
=============================================

While there a great deal of techniques and ressources that help to connect Ocaml 
with C, I had hard time to find a very simple example that shows how you can
call a C function from Ocaml.

This example shows a foreign function call via Ocamls FFI (Foreign Function
Interface).
Based on a question on StackOverflow.com [In OCaml 4.03.0 FFI fails to compile with "No implementations provided" Error](https://stackoverflow.com/questions/39698523/in-ocaml-4-03-0-ffi-fails-to-compile-with-no-implementations-provided-error).