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</o:shapelayout></xml><![endif]--></head><body bgcolor=white lang=EN-GB link=blue vlink=purple><div class=WordSection1><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal>> "necessarily infringed"? Does that mean that if ARM contributes code that unnecessarily uses ARM-owned patents, people don't get the implicit license and are liable?<o:p></o:p></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>[Caveat: I am not a lawyer] This wording can be found in many common CLA (contributor licence agreement). With my limited understanding of the patent parlance, this relates to a kind of transitivity between patents: people only get the licence for what is in the contribution; for example, the fact we contribute some code generation stuff (necessarily infringed) does not give people a licence on the target architecture (unnecessarily infringed).<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal>> Isn't the point to limit patent claims *by* ARM on users of LLVM? I don't see how this license would limit claims *on* ARM, nor why the project would care about that. Unless the lawyers have managed to corrupt the meaning of "on" in this case.<span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>[Caveat: I am not a lawyer] It removes doubts and clarifies the situation, at least for the lawyers, and this better protects users, LLVM and ARM. Users get the licence for what we contributed to LLVM, but not to the complete patent portfolio. This ultimately benefits the LLVM project, which does not want to be in the middle of some patent madness.<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Best regards,<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>--<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'>Arnaud<o:p></o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif";color:#1F497D'><o:p> </o:p></span></p><div style='border:none;border-left:solid blue 1.5pt;padding:0cm 0cm 0cm 4.0pt'><div><div style='border:none;border-top:solid #B5C4DF 1.0pt;padding:3.0pt 0cm 0cm 0cm'><p class=MsoNormal><b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'>From:</span></b><span lang=EN-US style='font-size:10.0pt;font-family:"Tahoma","sans-serif";color:windowtext'> cfe-dev-bounces@cs.uiuc.edu [mailto:cfe-dev-bounces@cs.uiuc.edu] <b>On Behalf Of </b>Sebastian Redl<br><b>Sent:</b> 02 December 2014 18:04<br><b>To:</b> cfe-dev@cs.uiuc.edu<br><b>Subject:</b> Re: [cfe-dev] ARM contributing to libc++ & libc++abi<o:p></o:p></span></p></div></div><p class=MsoNormal><o:p> </o:p></p><p class=MsoNormal><o:p> </o:p></p><div><p class=MsoNormal>On 02.12.2014 15:43, Marshall Clow wrote:<o:p></o:p></p></div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><p class=MsoNormal><o:p> </o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><p class=MsoNormal>On Dec 1, 2014, at 5:30 AM, Arnaud A. de Grandmaison <<a href="mailto:arnaud.degrandmaison@arm.com">arnaud.degrandmaison@arm.com</a>> wrote:<o:p></o:p></p></div><p class=MsoNormal><o:p> </o:p></p><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>We (ARM) intend to contribute to libc++ and libc++abi.<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>However, in order to do that, we would first need to add a ‘NOTICE.TXT’ file at the root of each of these projects which would contain:<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'> <o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>===================<o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>Patent agreement notice to LLVM users in accordance with Paragraph 2 of LLVM</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>Developer Policy, Patents subsection:</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'> </span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>Presently, ARM is unaware of any patents that would read on its LLVM</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>contributions. Nonetheless, to avoid doubt with respect to patent rights,</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>ARM hereby grants recipients of the software distributed by LLVM a perpetual,</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>worldwide, non-exclusive, no-charge, royalty-free, irrevocable patent license</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>to make, have made, use, offer to sell, sell, import, and otherwise transfer</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>software distributed by LLVM, where such license applies only to those patent</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Courier New"'>claims licensable by ARM that are necessarily infringed by ARM's contributions.</span><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'><o:p></o:p></span></p></div></div></blockquote></div></blockquote><p class=MsoNormal>"necessarily infringed"? Does that mean that if ARM contributes code that unnecessarily uses ARM-owned patents, people don't get the implicit license and are liable? <br><br><o:p></o:p></p><div><blockquote style='margin-top:5.0pt;margin-bottom:5.0pt'><div><div><p class=MsoNormal><span style='font-size:11.0pt;font-family:"Calibri","sans-serif"'>This does not change any licensing terms; it essentially helps limit any patent claims on ARM<o:p></o:p></span></p></div></div></blockquote></div><p class=MsoNormal>Isn't the point to limit patent claims *by* ARM on users of LLVM? I don't see how this license would limit claims *on* ARM, nor why the project would care about that. Unless the lawyers have managed to corrupt the meaning of "on" in this case.<br><br>Sebastian<o:p></o:p></p></div></div></body></html>