LICENSE.txt

In the following, "the OCaml Core System" refers to all files marked
"Copyright INRIA" in this distribution.

The OCaml Core System is distributed under the terms of the
GNU Lesser General Public License (LGPL) version 2.1 (included below).

As a special exception to the GNU Lesser General Public License, you
may link, statically or dynamically, a "work that uses the OCaml Core
System" with a publicly distributed version of the OCaml Core System
to produce an executable file containing portions of the OCaml Core
System, and distribute that executable file under terms of your
choice, without any of the additional requirements listed in clause 6
of the GNU Lesser General Public License.  By "a publicly distributed
version of the OCaml Core System", we mean either the unmodified OCaml
Core System as distributed by INRIA, or a modified version of the
OCaml Core System that is distributed under the conditions defined in
clause 2 of the GNU Lesser General Public License.  This exception
does not however invalidate any other reasons why the executable file
might be covered by the GNU Lesser General Public License.

----------------------------------------------------------------------

                  GNU LESSER GENERAL PUBLIC LICENSE
                       Version 2.1, February 1999

 Copyright (C) 1991, 1999 Free Software Foundation, Inc.
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That's all there is to it!