Thank you for the info. As I understand, if we skip the R pkg when releasing the a new version of MXNet, everything is OK. This is can be done by adding a .gitattribute.
I will ask on legal-discuss@ for more info and confirmation. Really thank you for all the info! It is super helpful. Best, KK On Fri, Jul 7, 2017 at 8:47 AM, Felix Cheung <felixcheun...@hotmail.com> wrote: > I was only referring to string_hash_code.c - it's not being built and it's > not part of the binaries release. > > There are two parts to it. > > For Spark binaries release, R package is built and the output is packaged > along with the rest of all jars and python stuff. > > There is also a source-only R package that we want to publish to CRAN. > This contains only R source (no java stuff). CRAN will then build cross > platform from that source - but again the part with string_hash_code.c is > disabled. > > I guess we should have removed string_hash_code.c from source but we are > secretly hoping we could sort that out at some point in the future.. (ie. > building cross platform) > > > _____________________________ > From: Qiang Kou <q...@umail.iu.edu<mailto:q...@umail.iu.edu>> > Sent: Friday, July 7, 2017 8:34 AM > Subject: Re: Rcpp licensing in Apache MXNet > To: <dev@mxnet.incubator.apache.org<mailto:dev@mxnet.incubator.apache.org > >> > > > Really thank you for the info. > > Can you tell us a little more on how Spark handles the R package? > > The building of R package is skipped when releasing, right? > > Best wishes, > > KK > > On Fri, Jul 7, 2017 at 7:41 AM, Felix Cheung <felixcheun...@hotmail.com< > mailto:felixcheun...@hotmail.com>> > wrote: > > > Re this > > > > 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 > > ). > > > > This is actually disabled - it is not getting built and it is not in the > > release - because the way SparkR is packaged in Spark release we haven't > > figured out how to release cross multiple platforms. > > > > (I'm one of the main contributor to SparkR) > > > > ________________________________ > > From: Henri Yandell <bay...@apache.org<mailto:bay...@apache.org>> > > Sent: Friday, July 7, 2017 12:02:16 AM > > To: dev@mxnet.incubator.apache.org<mailto:dev@mxnet.incubator.apache.org > > > > Subject: Re: Rcpp licensing in Apache MXNet > > > > 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<mailto: > 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<mailto: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><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><mailto:dev@mxnet. > > > incubator.apache.org<http://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>< > > > > 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<mailto:q...@umail.iu.edu> > > > School of Informatics and Computing, Indiana University > > > > > > > > > -- > Qiang Kou > q...@umail.iu.edu<mailto:q...@umail.iu.edu> > School of Informatics and Computing, Indiana University > > > -- Qiang Kou q...@umail.iu.edu School of Informatics and Computing, Indiana University
