Add IntelLLVM support & Spack-based CI

[AlexanderRichert-NOAA]

This PR adds IntelLLVM (OneAPI) support and adds a Spack-based CI workflow.

Fixes #32
Fixes #37
Supersedes #33

[GeorgeVandenberghe-NOAA]

Is LLVM object compatible. To test this properly I need to check it out, and build codes with it. Successful build is sufficient for gfsio because it is NEVER used in execution but for other libraries an independent evaluator will need to build and run. Alternatively I can just look at your test logs and approve them and the PR.

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On Thu, Nov 9, 2023 at 6:24 PM Alex Richert ***@***.***> wrote: @AlexanderRichert-NOAA <https://github.com/AlexanderRichert-NOAA> requested your review on: #36 <#36> Add IntelLLVM support & Spack-based CI. — Reply to this email directly, view it on GitHub <#36 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ANDS4FQ4HBZ5HQNJ4HYPKBTYDVQZJAVCNFSM6AAAAAA7FKD3EKVHI2DSMVQWIX3LMV45UABCJFZXG5LFIV3GK3TUJZXXI2LGNFRWC5DJN5XDWMJQHEYTSMBQHEZTAMY> . You are receiving this because your review was requested.Message ID: ***@***.***>

-- George W Vandenberghe *Lynker Technologies at * NOAA/NWS/NCEP/EMC 5830 University Research Ct., Rm. 2141 College Park, MD 20740 ***@***.*** 301-683-3769(work) 3017751547(cell)

[AlexanderRichert-NOAA]

Object compatible with regular Intel ("classic")? I believe it's supposed to be, but in practice I don't think we'll ever mix them. In some sense this is preparing us for when whole stacks+models are built with the new compilers. We won't switch spack-stack over to LLVM/OneAPI on any given system until the applications that use them are ready.

[GeorgeVandenberghe-NOAA]

The applications that use them won't be ready even to compile until we have the stacks built with the new compiler. Which brings up the question, are modules (fortran .mod files) compatible. If not, we will have to build an entire stack with the new compiler and then port the application builds. A straightforward application that uses a lot of this stuff is UPP. I am probably a good person to do that and yeah I know I am going to regret saying that,

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On Thu, Nov 9, 2023 at 7:52 PM Alex Richert ***@***.***> wrote: Object compatible with regular Intel ("classic")? I believe it's supposed to be, but in practice I don't think we'll ever mix them. In some sense this is preparing us for when whole stacks+models are built with the new compilers. We won't switch spack-stack over to LLVM/OneAPI on any given system until the applications that use them are ready. — Reply to this email directly, view it on GitHub <#36 (comment)>, or unsubscribe <https://github.com/notifications/unsubscribe-auth/ANDS4FURD627DVIBTSQOQNDYDV3DPAVCNFSM6AAAAAA7FKD3EKVHI2DSMVQWIX3LMV43OSLTON2WKQ3PNVWWK3TUHMYTQMBUHEYDIOJTGQ> . You are receiving this because your review was requested.Message ID: ***@***.***>

-- George W Vandenberghe *Lynker Technologies at * NOAA/NWS/NCEP/EMC 5830 University Research Ct., Rm. 2141 College Park, MD 20740 ***@***.*** 301-683-3769(work) 3017751547(cell)

[edwardhartnett]

Nice.