(Please CC me on replies, as I am not subscribed currently). The development version (not in testing/unstable for now) of cp2k, which is under the GPLv2+ itself has just added support for the ELPA library:
http://cp2k.svn.sourceforge.net/viewvc/cp2k?revision=12491&view=revision ELPA's homepage is here: http://elpa-lib.fhi-berlin.mpg.de/wiki/index.php/Main_Page Besides the hoops one has to jump through in order to obtain ELPA from there (register and/or email, there does not seem to be a public file release or repository available at this time), they say ELPA is licensed under the LGPL with some additional clauses. I assume the copy in the CP2K repository is a verbatim copy of theirs: http://cp2k.svn.sourceforge.net/viewvc/cp2k/trunk/cp2k/src/elpa_lib/COPYING/COPYING?revision=12491&view=markup&pathrev=12491 It says this: --8<-- Licensing and copyright terms for the ELPA library: ELPA Consortium (2011) **** Copyright of the original code rests with the authors inside the ELPA consortium. The copyright of any additional modifications shall rest with their original authors, but shall adhere to the licensing terms set forth below. **** The code is distributed under ALMOST all of the the terms of the GNU Lesser General Public License version 3 (LGPL). The full text can be found in the file "lgpl.txt" in this repository. "lgpl.txt" makes reference to the GPL v3, which can also be found in this repository ("gpl.txt"). While we are not allowed to alter the license texts as written in those files, IN ADDITION our own license prescribes two important modifications / clarifications to the original lgpl.txt: - In point 2., clause b) - stating that that you may redistribute under the terms of the plain GNU GPL - shall NOT apply. In other words, if you redistribute, you MUST keep the additional permissions of the LGPL v3 in place. - If you redistribute, you must redistribute under the terms of the LGPL version specified here. Using later or earlier versions published by anyone except the ELPA copyright holders is not allowed. **** When in doubt, talk to us. What we would like to ensure is that the ELPA code can be used as needed, while providing a strong incentive for others to contribute their modifications back to the original development. **** --8<-- My main question would be whether the above can considered GPLv2+-compatible, i.e. whether cp2k can use this. The other question would be how to best approach the ELPA folks to make them feel alright that the LGPLv3+ is fine for them. Cheers, Michael -- To UNSUBSCRIBE, email to [email protected] with a subject of "unsubscribe". Trouble? Contact [email protected] Archive: http://lists.debian.org/[email protected]
