We should bring this up on general@incubator or legal-discuss@. On Thu, Jul 6, 2017 at 10:59 PM, Qiang Kou <q...@umail.iu.edu> wrote:
> Really thank you for the clearance. > > From the link you provided, > > "However, if the component is only needed for optional features, a project > can provide the user with instructions on how to obtain and install the > non-included work." > > I think this is exactly our case. We provide instructions on how to install > GNU R and the Rcpp package. > > Besides, our case is very similar with Spark. > > The Spark R package includes "R.h" and "Rinternals.h", which are both LGPL > ( > https://github.com/apache/spark/blob/master/R/pkg/src- > native/string_hash_code.c#L24-L25 > ). > > Best wishes, > > Qiang Kou > > On Thu, Jul 6, 2017 at 6:09 PM, Felix Cheung <felixcheun...@hotmail.com> > wrote: > > > I'm not the authority on this but a release from an ASF project is > > different from releasing with the Apache 2.0 license. > > > > You can find more out this here > > https://www.apache.org/legal/resolved.html#optional > > > > Specifically, quote: > > "Optional means that the component is not required for standard use of > the > > product or for the product to achieve a desirable level of quality." > > > > Basically my interpretation is that if an ASF project cannot function > > without a component, then it is required and such required component > cannot > > be one of the prohibited licenses. > > > > https://www.apache.org/legal/resolved.html#category-x > > > > Probably a good idea to start a thread with legal@ if there are more > > questions. > > > > _____________________________ > > From: Qiang Kou <q...@umail.iu.edu<mailto:q...@umail.iu.edu>> > > Sent: Thursday, July 6, 2017 3:41 PM > > Subject: Re: Rcpp licensing in Apache MXNet > > To: <dev@mxnet.incubator.apache.org<mailto:dev@mxnet. > incubator.apache.org > > >> > > > > > > Hi, Felix, > > > > I just want to make sure there is no misunderstanding between us. > > > > (1) The MXNet R package heavily used the Rcpp package, but we only > include > > the > > header file, Rcpp.h, like https://github.com/dmlc/mxnet/ > > blob/master/R-package/src/base.h#L11 > > > > The MXNet R package doesn't contain any source code from Rcpp and there > is > > no linking against Rcpp. > > > > (2) There is "LinkingTo: Rcpp" in the R package description ( > > https://github.com/dmlc/mxnet/blob/master/R-package/DESCRIPTION#L32). > > However, this only means we want to use the header files from Rcpp. > > > > "A package that wishes to make use of header files in other > > packages needs to declare them as a > > comma-separated list in the field ‘LinkingTo’ in the DESCRIPTION file. " > > > > More details can be found from R's official manual ( > > https://cran.r-project.org/doc/manuals/r-release/R-exts. > > html#Package-Dependencies). > > > > (3) Many R packages who use Rcpp to communicate with C++ have been > released > > under Apache License, like feather (https://github.com/wesm/ > > feather/blob/master/R/DESCRIPTION). > > > > Best, > > > > Qiang Kou > > > > On Thu, Jul 6, 2017 at 1:20 AM, Felix Cheung <felixcheun...@hotmail.com< > > mailto:felixcheun...@hotmail.com>> > > wrote: > > > > > On a related note, Rcpp, used extensively in the R package, is > > GPLv2/GPLv3 > > > licensed. > > > > > > I'm not aware of any other R package available that supports R<->C++. > > > > > > https://www.apache.org/legal/resolved.html#category-x > > > https://cran.r-project.org/web/packages/Rcpp/index.html > > > > > > > > > > > > > > > -- > Qiang Kou > q...@umail.iu.edu > School of Informatics and Computing, Indiana University >
