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Here is a summary of the 3rd party components used at the current time.

Bundled with source code

cptversionlicencelicense linknotes
libstemmer-porterporter2BSDhttp://snowballstem.org/license.html 
m_widen_initnoneMIThttps://github.com/apache/incubator-madlib/blob/master/licenses/third_party/_M_widen_init.txt 
python-argparse1.2.1Pythonhttps://wiki.python.org/moin/PythonSoftwareFoundationLicenseFaq 
pyyaml3.10MIThttp://pyyaml.org/wiki/PyYAML 
UseLATEX.cmake2.1.1BSDSee header of 
https://github.com/kmorel/UseLATEX/blob/master/UseLATEX.cmake		 


Downloaded at build time

cptversionlicencelicense linknotes
boost1.61.0MIThttp://www.boost.org/users/license.html 
pyxb1.2.4Apache 2.0http://pyxb.sourceforge.net/legal.htmlSee Note 1 below
eigen3.2MPL 2.0http://eigen.tuxfamily.org/index.php?title=Main_Page#LicenseSee Note 2 below


Note 1
PyXB: Python XML Schema Bindings
http://pyxb.sourceforge.net/

http://pyxb.sourceforge.net/legal.html
says
“PyXB as a whole is made available under the Apache License v 2.0.”
See also
https://github.com/pabigot/pyxb/blob/next/LICENSE
which has the standard Apache License Version 2.0 verbage.

However, we noticed that it has a GPL 3.0 sub-component:
https://github.com/pabigot/pyxb/blob/next/doc/extapi.py
(This seems strange, but anyways…)

Remedy in Sept 2015 when MADlib entered as a Apache incubating project:

  • At build time, we remove this GPL sub-component since it is not needed,
    just to be 100% sure we are only including Apache License Version 2.0 software.
  • This is the reason there is a message during build that says “PyXB: Removing GPL component from code base”

Note 2
Eigen
http://eigen.tuxfamily.org/

http://eigen.tuxfamily.org/index.php?title=Main_Page#License
says
“Eigen is Free Software. Starting from the 3.1.1 version, it is licensed under the MPL2…Note that currently, a few features rely on third-party code licensed under the LGPL: SimplicialCholesky, AMD ordering, and constrained_cg.”

MADlib uses a later version than 3.1.1.

Remedy in Sept 2015 when MADlib entered as a Apache incubating project, as per http://www.apache.org/legal/resolved.html#category-b :

  • Cloned Eigen header files and made needed changes, then maintained on a separate GitHub repo https://github.com/madlib/eigen
  • This modified Eigen GitHub project carries forward the MPL license. The commits showing changes made are here https://github.com/madlib/eigen/tree/branches/3.2
  • At build time, MADlib project will then include the Eigen header files from this repo
  • Also we use the EIGEN_MPL2_ONLY preprocessor symbol to explicitly exclude the LGPL components



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