[tz] License of lzip, lzlib and pdlzip
Antonio Diaz Diaz
antonio at gnu.org
Sun Feb 11 18:08:34 UTC 2018
Bryan Smith wrote:
> There is still a heavy copyleft (e.g., GPL) v. non-copyleft FLOSS
> debate that rages on, with various people putting various values --
> from nothing to everything -- on that. lzip -- or more problematic,
> it's lzlib -- is GPLv2 -- not even LGPL -- which has some asterisks
> for commercial developers. I don't know the state of public domain
> lzip (pdlzip), but it seems to be good enough for any decompression
> (and most general compression).
Thanks for your comments. I'll just add a clarification about lzip
Lzip itself is GPL version 2 or later.
Lzlib was also GPLv2+, but a year ago (in version 1.9) the license was
changed to 2-clause BSD as you can see in lzlib's homepage. There is
also another BSD licensed library (libarchive) able to (de)compress lzip
files and lzip-compressed tar archives.
Pdlzip has a 2-clause BSD license. It is maintained and fully
compatible with the lzip format for both compression and decompression.
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