Re: [ITA] pocl

[Brian Inglis <Brian.Inglis@SystematicSW.ab.ca>]

On 2024-01-03 05:00, Takashi Yano via Cygwin-apps wrote:
> On Wed, 3 Jan 2024 04:38:02 -0700
> Brian Inglis wrote:
>> On 2024-01-03 02:29, Takashi Yano via Cygwin-apps wrote:
>>> On Wed, 3 Jan 2024 08:54:17 +0100
>>> Marco Atzeri wrote:
>>>> On 03/01/2024 06:25, Takashi Yano via Cygwin-apps wrote:
>>>>> On Wed, 3 Jan 2024 14:14:12 +0900
>>>>> Takashi Yano via Cygwin-apps <cygwin-apps@cygwin.com> wrote:
>>>>>> I'd like to adopt the pocl package.
>>>>>> - Update to latest upstream release.
>>
>>>> $ git diff  |grep "^+"
>>>> +++ b/cygwin-pkg-maint
>>>> +pocl                                         Takashi Yano
>>
>>>>> Sorry, the latest upstream release is 5.0 however, 4.0 and later
>>>>> cannot be built in current cygwin because LLVM package is old.
>>>>> This update is up to 3.1.
>>
>>>>>> - Enable CUDA support.
>>
>>>> Curiosity, how do we support CUDA on Cygwin ?
>>
>>> nvidia cuda toolkit is used in build stage of user programs.
>>> Although this is not very desirable for cygwin package, I thought
>>> that the advantage of being able to use the GPU was greater than
>>> the disadvantage.
>>> However, on the second thought, cuda support should be a separeted
>>> package from the base package, and suggest installing cuda toolkit
>>> in the install stage of of that package.
>>> Let me consider a bit. If you have any idea, please let me know.
>>
>> Please note CUDA is Nvidia proprietary closed source - I do not think we can or
>> should touch it when OpenCL 3+ supports Nvidia devices.
>> Fedora does not support CUDA although others do in their non-free "sources".
> 
> We do not touch CUDA itself or distribute its binaries, but just use binaries
> distributed by NVIDIA. Source code in pocl is not NVIDIA proprietary. In that
> sense, cygwin itself uses microsoft proprietary closed source modules.

Cygwin provides and runs open source tools, headers, and libraries to perform 
the builds and execution, calling proprietary interfaces to support POSIX.

> So, enabling CUDA support in pocl should also be allowed, I think.

I believe not if the Nvidia tools do not have sources available to build with 
Cygwin tools built from sources.
-- 
Take care. Thanks, Brian Inglis              Calgary, Alberta, Canada

La perfection est atteinte                   Perfection is achieved
non pas lorsqu'il n'y a plus rien à ajouter  not when there is no more to add
mais lorsqu'il n'y a plus rien à retirer     but when there is no more to cut
                                 -- Antoine de Saint-Exupéry