Re: The impact of a module's license on the requiring Lua program

[Erik Hougaard <erik@...>]

On 10-04-2012 08:44, Marc Balmer wrote:
> What impact does the license of a Lua module have on the requiring (i.e.
> calling) Lua program?
>
> If a Lua module is GPLed, does using that module with 'require' make my
> Lua program a derivative work as per GPL terms or is it merely running
> the program as per GPL terms? The latter case would mean that my Lua
> program needs not be published under the GPL.
My understanding is that requires a LGPL license on the module.

From http://www.gnu.org/licenses/gpl-faq.html#GPLPluginsInNF

"If the program dynamically links plug-ins, and they make function calls 
to each other and share data structures, we believe they form a single 
program, which must be treated as an extension of both the main program 
and the plug-ins. This means that combination of the GPL-covered plug-in 
with the non-free main program would violate the GPL. However, you can 
resolve that legal problem by adding an exception to your plug-in's 
license, giving permission to link it with the non-free main program."

/Erik