Re: [Rd] [SoC09-Info] An IPopt interface for R

From: Thomas Lumley <tlumley_at_u.washington.edu>
Date: Sun, 22 Feb 2009 23:49:23 -0800 (PST)


On Sun, 22 Feb 2009, Douglas Bates wrote:

> On Sun, Feb 22, 2009 at 3:05 PM, Douglas Bates <bates_at_stat.wisc.edu> wrote:

>> There have been several messages on R-devel mentioning the interior
>> point optimization software Ipopt, https://projects.coin-op/Ipopt/.
>> This C++ library is released under a license called the Common Public
>> License.
>>
>> I have two questions that readers of R-devel may be able to answer.
>>
>> 1) Would creating an Ipopt interface for R be duplicating existing
>> efforts? That is, has someone already done so or is already working
>> on this project.
>>
>> 2) Could a package incorporating Ipopt be released under some version
>> of the GPL or LGPL?
>>

Also, according to the FSF, the CPL used in Ipopt is technically incompatible with the GPL because of its choice of law clause.

       -thomas

Thomas Lumley			Assoc. Professor, Biostatistics
tlumley_at_u.washington.edu	University of Washington, Seattle

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