[postgis-users] Is PostGIS effectively LGPL?

[Sandro Santilli]

On Wed, Dec 21, 2016 at 03:25:28PM -0500, Bruce Momjian wrote:
> 
> Well, imagine someone writes a closed-source server-side function that
> calls PostGIS functions.  Is that allowed?

It is allowed to write the function, but if such function is *distributed*,
then it will need to be distributed under the GPL license.

> I think the dynamic linking thing has always been unclear so clarifying
> it in the FAQ is fine, if in fact that is what is says, and other
> projects have done this clarification.  Right now I am not sure where
> PostGIS is on this issue.

To me using SQL from plpgsql or sql to call PostGIS is not to be
considered linking, while using DirectFunctionCall or directly
calling liblwgeom functions is.

--strk;