[YetiSim-developers] YetiSim Source License: GPLv3 vs. GPLv3 With Runtime Exception

[AJ G. <aj...@ye...>]

Hey,

Currently the YetiSim source code is licensed under the GPLv3.  This was
chosen as an initial license to be overprotective, since the merits of the
LGPL had not yet been considered.  SimPy is licensed under the LGPL, and the
motivation for this is likely to permit users to use the simulation
framework without being forced to open the source code to their simulations.

Threading Building Blocks (TBB) is licensed under the GPLv2 with a runtime
exception.  It permits proprietary applications to be built with it, but
changes made to TBB itself must be shared.  This is the same license used
for libc++, see http://gcc.gnu.org/onlinedocs/libstdc++/faq.html#faq.license

I don't think YetiSim will grow as a project with the current GPLv3
licensing.  I somewhat like the idea of using a GPLv3 with a runtime
exception, like TBB's GPLv2 with runtime exception.  This would protect the
core YetiSim code, while permitting others to develop their own simulations
without sharing their code.

Opinions?

AJ