PyOpenCL includes derivatives of parts of the `Thrust
<https://github.com/NVIDIA/thrust>`_ computing package (in particular the scan
implementation). These parts are licensed as follows:

    Copyright 2008-2011 NVIDIA Corporation

    Licensed under the Apache License, Version 2.0 (the "License");
    you may not use this file except in compliance with the License.
    You may obtain a copy of the License at

        <https://www.apache.org/licenses/LICENSE-2.0>

    Unless required by applicable law or agreed to in writing, software
    distributed under the License is distributed on an "AS IS" BASIS,
    WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    See the License for the specific language governing permissions and
    limitations under the License.

.. note::

    If you use Apache-licensed parts, be aware that these may be incompatible
    with software licensed exclusively under GPL2.  (Most software is licensed
    as GPL2 or later, in which case this is not an issue.)
