Add cmake build copied from COSIMA/access-om3

[aidanheerdegen]

Add CMake build infrastructure.

CMakelists.txt copied from https://github.com/COSIMA/access-om3/blob/main/CICE/CMakeLists.txt with some common code copied from the top level https://github.com/COSIMA/access-om3/blob/main/CMakeLists.txt.

Closes #5

[anton-seaice]

@micaeljtoliveira - if you have time to review that would be great.

This builds a library called cicelib from using the nuopc/cmeps driver code and the access3-share libraries. This is a companion PR to ACCESS-NRI/access3-share#2

[anton-seaice]

@apcraig - I would like to merge this upstream into the CICE-consortium repository at some point. I don't think there is general interest in a cmake build, so do you have a suggested folder/location for this to be clear its ACCESS specific? (rather than a general CICE thing)

[apcraig]

Hi @anton-seaice. This looks interesting. I don't think we want to move to cmake at the moment, but maybe someone else in the community will find it useful. I don't think it belongs in the cicecore/drivers area. What if we created a new directory, configuration/scripts/cmake (or cmake-access)? We could have a README there that explains it's not used by the standalone model. We could add a little bit of documentation to the user guide to explain how it might be used if someone wanted to use it? Are these cmake scripts fairly general or is the implementation focused on the ACCESS model? What are your thoughts about where we should place them?

[anton-seaice]

Thanks @apcraig

I agree that configuration/scripts makes sense - it could be configuration/scripts/cmake or configuration/scripts/machines/cmake

There are two supported variations here, one is the standalone build. This is fairly general and should work for most people wanting to use cice-standalone. (I had thought I could add this as a CI triggered build, although maybe its not particularly useful ... its slightly related to CICE-Consortium#933)

The other one is the cice library using the nuopc/cmeps driver. This depends on having already built cmeps/cdeps/share libraries (which ACCESS have bunlded together in one CMake package) and so is less useful. We don't use CIME, but CESM (and UFS??) are built somehow through CIME, so whilst they do use CMake, its not really linked to how ACCESS is using CMake.

[micaeljtoliveira]

@anton-seaice Overall looks good, just a couple of suggestions/questions. Might come back and have a look at the namespaces once this is settled in your other PR.

[anton-seaice]

@micaeljtoliveira - this is ready for final review

again - it builds cice standalone or libraries for access-om3

[anton-seaice]

I think I addressed all the comments. This can be re-reviewed

New builds

ACCESS-NRI/ACCESS-OM3#35 (comment)
ACCESS-NRI/ACCESS-OM3#65 (comment)

[micaeljtoliveira]

Thanks for all the changes. LGTM!