[development] Modules that integrate non-GPL PHP apps violate the GPL.

[Darren Oh]

I wrote this quickly and failed to sum fully sum up the two claims  
being made. Clarification:

1. The first claim concerns third-party code: you cannot use a GPL- 
incompatible license for an app designed to be used with Drupal or a  
Drupal module.

2. The second claim concerns the code of Drupal and contributed  
modules: you cannot use the GPL for code designed to be used with a  
third-party app unless a) you can distribute your code and the third- 
party app together under the GPL as a combined work or b) you add an  
exception clause giving up the first claim.

On Sep 9, 2007, at 11:43 PM, Darren Oh wrote:

> Further simplification of the claims being made now appears  
> possible. There are two:
>
> 1. You cannot use a GPL-incompatible license for an app if it calls  
> functions in Drupal or in a Drupal contributed module. This claim  
> is not disputed.
>
> 2. You cannot use the GPL for code that calls functions in a third- 
> party app if you cannot distribute your code and the third-party  
> app together as a single work using the GPL. This claim is disputed.