[PD] expr alternative

Hans-Christoph Steiner hans at at.or.at
Tue Oct 25 20:09:20 CEST 2011

Hey Martin,

I haven't heard that before.  Do you have any references on the App  
Store being compatible with the LGPL?  I found this write-up on the  
topic, it makes sense to me, and outlines basically how the App Store  
is incompatible with the FSF copyleft idea, which is definitely  
included in this LGPL:


One thing to remember in all this: it is totally legal and clear to  
make an GPL/LGPL app for iOS and distribute it outside of the App  
Store.  It is the App Store that is the issue.


On Oct 25, 2011, at 1:39 PM, Martin Roth wrote:

> As far as I know, if expr would be LGPL, then everything is ok, even  
> in the App Store. The expr library itself can be used in non-GPL  
> code (like Pd). The library source is freely widely available on the  
> internet. And otherwise if anyone makes any changes to the expr  
> object then those changes should be made public. Done and done.
> On 25 October 2011 18:26, Max <abonnements at revolwear.com> wrote:
> Am 25.10.2011 um 19:10 schrieb Hans-Christoph Steiner:
> > On Oct 25, 2011, at 10:15 AM, Mathieu Bouchard wrote:
> >> Le 2011-10-25 à 12:19:00, Max a écrit :
> >>
> >>> So what is the situation now that expr could be LGPL instead of  
> GPL? What does that mean for things like the Apple App Store?
> >>
> >> In the end I'm not sure anymore that LGPL would be fine, even  
> though it does look like Apple ships with LGPL libs. (Though it's  
> not impossible they might have rewritten them just to avoid the  
> license...).
> >>
> >> There's too much contradiction between comments about it on the  
> web, so, to sort out the subtleties, it would be best to ask the FSF  
> about it.
> >>
> >> Well, you could ask Apple too. But I bet that the FSF will give  
> more attention to your question.
> >
> >
> > The problems are with software that ships from the Apple App  
> Store, due to the way that is managed and the Terms of Service. It  
> is the management and terms of service of the App Store that  
> conflict with the GPL/LGPL.  Apple ships lots of GPL and LGPL  
> software as part of Mac OS X and iOS, but that does not touch the  
> Apple App Store, so they can be in complete compliance.
> >
> > So Max, if you are interested in the Apple App Store, I think it  
> is incompatible with all FSF licenses, and perhaps all copyleft  
> licenses.  The short term answer is to ship your iOS apps outside of  
> the App Store, and the real fix is to get Apple to make their App  
> Store compatible with copyleft licenses.
> The question was asked by the author of expr - maybe I must re- 
> phrase: Now that IRCAM is okay with changing their license of parts  
> of expr from GPL to LGPL would that solve the issue of expr beeing  
> used in the BSD vanilla in applications like for instance RJDJ in  
> the Apple App store? (Or respectively any other use scenario where  
> the choice of license imposes restrictions) If the answer is yes,  
> then Shahrokh can go ahead and change the licence, fixed. If the  
> answer is no, then a rewrite of expr to be fully BSD is probably the  
> only solution to solve this.
> m.
> BK4AnRXBVU0Xj8s0IqrJjbdDBCy3O90M
> =ngpy
> -- 
> Martin Roth, CTO
> Tel : +44 793 241 66 20
> Twitter : @supersg559
> Reality Jockey, Ltd.
> 55B Holywell Lane
> EC2A 3PQ
> London, UK


"Free software means you control what your computer does. Non-free  
software means someone else controls that, and to some extent controls  
you." - Richard M. Stallman

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