This software is licensed under the GPL version 2, in which subclasses are
considered 'derived works'. See COPYING.GPLv2 for the full terms of the
license.

As a special exception, dynamically loadable subclasses of classes
defined in libecs, which are developed as part of simulation models or
algorithm modules, are not covered by the license even if the resulting
binary happens to include portions originated from this software through
inlining, template instantiation, or subclassing done by the compiler
and linker. Derivative works resulted from any other activities are covered
by the GPL.

Please note that this package contains several third-party softwares
that are licensed under the terms different from the GPL. See README for
details of these softwares.
