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Re: Add memcpy support for SPARC
On Thu, May 24, 2018, 3:43 PM Joel Sherrill <joel@rtems.org> wrote:
>
>
> On Thu, May 24, 2018, 2:19 PM Eric Blake <eblake@redhat.com> wrote:
>
>> On 05/24/2018 02:09 PM, Aditya Upadhyay wrote:
>> > Hi Developers,
>> >
>> > Is this ok to add memcpy implementation from Open Solaries?
>> >
>> >
>> https://bitbucket.org/a3217055/illumos-gate-import/src/741592a55c4c9746705ce0fd9232f5acded43ed0/usr/src/lib/libc/sparc/gen/memcpy.s?at=default&fileviewer=file-view-default
>>
>> That uses the CDDL license. Nothing else in newlib does.
>>
>> The FSF claims CDDL and GPL are incompatible; others refute this claim
>> (such as
>>
>> https://opensource.stackexchange.com/questions/2094/are-cddl-and-gpl-really-incompatible),
>>
>> but I'm not a lawyer to say who is right. At any rate, given the
>> controversy, my gut feel is that you should NOT copy any CDDL code into
>> newlib, unless YOU provide the lawyers to back up your claim.
>>
>> > If yes, then Could you please tell us rules about modifying the
>> > Licance of third party code?
>>
>> I _do_ know that you CANNOT modify the existing license on ANY file that
>> you are importing from a third party, since you are not the license
>> holder (some permissive licenses allow you to relicense code under a
>> more restrictive license of your choice, which is different from
>> modifying the existing license - but I doubt CDDL falls into that
>> category). And of course, using that code without copying the license
>> statement is a bad idea.
>>
>> So that probably means using OpenSolaris code as your base point is a
>> bad idea.
>>
>
> Ok. Since you and Corinna disagree, let's be safe. Do you have another
> source for an acceptablely licensed SPARC V7 mem* and str*?
>
The Attic for NetBSD has some but not the ones we want.
http://cvsweb.netbsd.org/bsdweb.cgi/src/lib/libc/sparc/?only_with_tag=MAIN
>
>> --
>> Eric Blake, Principal Software Engineer
>> Red Hat, Inc. +1-919-301-3266
>> Virtualization: qemu.org | libvirt.org
>>
>