On 6 February 2012 09:32, Nicolas George <nicolas.geo...@normalesup.org> wrote: > L'octidi 18 pluviôse, an CCXX, John Dexter a écrit : >> If you're going to make such assertions please back them up. My >> research into dynamic linking of (L)GPL libraries finds multiple >> explicit claims that distribution of the library source code is _not_ >> required if I haven't modified the original, according to LGPL section >> 6, specifically 6b. >> (http://www.gnu.org/licenses/old-licenses/lgpl-2.1.html linked from >> ffmpeg legal page). > > As pointed out by someone else, 6b covers the case where you do not > distribute the library at all, you distribute only the application, and rely > on the user to provide a suitable version of the library, probably by > already having it on their system. > > Theoretically, the (L)GPL requires you to distribute the source code, even > if it was just compiled and not modified. A lot of projects will not take it > amiss if you do not distribute unmodified sources, provided you meet the > other requirements, especially the prominent notice. In other words, they > are interested in your enhancements to the code, not in hogging your > bandwidth. People in ffmpeg are more strict about the requirements because > there have been problems in the past. > > Please also note that 6c is more risky than it appears, and more risky than > 6a: with 6a, you only need to provide the source code to the people you > distributed the product, that is just a few megabytes in one corner on your > installation medium. With 6c, you must provide the source code to whoever > asks, because the offer can be transmitted from one person to another, > outside your control. >
Thanks Nicholas and Phil... obviously I have no problem providing source if asked to, and in putting the license in my redistributable. I read somewhere that including a link to where users could download the source themselves can be counted as "distributing the source"? I was very surprised by claims it's a requirement, simply because none of the LGPL libraries I've used have ever mentioned it in the case of dynamic linking. I found this discussion: http://teem.sourceforge.net/lgpl.html - search for "the interesting part". Obviously only one person's view of it, but it seemed to make sense. Thanks again. John. _______________________________________________ Libav-user mailing list Libav-user@ffmpeg.org http://ffmpeg.org/mailman/listinfo/libav-user