|Re: [eigen] copyright / license question|
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Well, if it's LGPLv 2.1 or later, the license specificaly say that you can
relicense to LGPLv3.0 or later, and also to GPL2+. For the first part, it's
what the later is for ;)
For the second one just look at paragraph 3:
3. You may opt to apply the terms of the ordinary GNU General Public License
instead of this License to a given copy of the Library. To do this, you must
alter all the notices that refer to this License, so that they refer to the
ordinary GNU General Public License, version 2, instead of to this License.
(If a newer version than version 2 of the ordinary GNU General Public License
has appeared, then you can specify that version instead if you wish.) Do not
make any other change in these notices.
Once this change is made in a given copy, it is irreversible for that copy,
so the ordinary GNU General Public License applies to all subsequent copies
and derivative works made from that copy.
This option is useful when you wish to copy part of the code of the Library
into a program that is not a library.
Well of course, it doesn't prevent you to drop a note to the author, I am sure
he will be happy to know that his code is use elsewhere ;) And he won't have
the bad surprise to see his code has been improved but in a license he