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The library is dual licensed under plain BSD [1] and GPLv2 [2]. [1] https://github.com/facebook/zstd/blob/dev/LICENSE https://github.com/facebook/zstd/blob/dev

The library is dual licensed under plain BSD [1] and GPLv2 [2]. [1] https://github.com/facebook/zstd/blob/dev/LICENSE https://github.com/facebook/zstd/blob/dev/LICENSE [2] https://github.com/facebook/zstd/blob/dev/COPYING https://github.com/facebook/zstd/blob/dev/COPYING

koolba 9y ago
Which only makes things more confusing. Is it dual licensed, both apply? Or dual license, your choice? That only complicates the patent question further.
- terrelln 9y ago
  The GPLv2 license was added for inclusion in the kernel, you may choose either GPLv2 or BSD. See the header file https://github.com/facebook/zstd/blob/dev/lib/zstd.h https://github.com/facebook/zstd/blob/dev/lib/zstd.h.
  - koolba 9y ago
    Sweet. Would be nice if that was in the README too as it only mentions the BSD license, but the top level includes the GPL as well. There's still the open patent question but this (i.e. BSD license) makes it easier to decide to use it.
    - terrelln 9y ago
      It is mentioned at the bottom of the README, but it isn't very findable. I've opened a PR https://github.com/facebook/zstd/pull/1085 https://github.com/facebook/zstd/pull/1085.
      - exikyut 9y ago
        Which got accepted (an hour after you submitted it) - nice!
- eridius 9y ago
  Dual-licensed means buyer's choice. As the client of the library, you can use it under the terms of either license.