Change FVCOM background IO to read 32-bit surface restart files.

[hu5970]

DESCRIPTION OF CHANGES:

RRFS uses 32-bit CCPP and it generates 32-bit surface restart file instead of 64-bit restart files.
This requires to change the interface of FVCOM to read 32-bit variables instead of 64-bit variables.

TESTS CONDUCTED:

If there are changes to the build or source code, the tests below must be conducted. Contact a repository manager if you need assistance.

• Compile branch on all Tier 1 machines using Intel (Orion, Jet, Hera and WCOSS2). Done using 13b5583.
• Compile branch on Hera using GNU. Done using 13b5583.
• Compile branch in 'Debug' mode on WCOSS2. Done on Cactus using 13b5583.
• Run unit tests locally on any Tier 1 machine. Done on Hera using 13b5583.
• Compile with doxygen - Done on Hera using 13b5583.

Describe any additional tests performed.

• Tested on WCOSS2 with RRFS real-time runs.

Note: this code does not have any consistency tests.

ISSUE:

Fixes issue mentioned in #847

[GeorgeGayno-NOAA]

@hu5970 - the unit test fails to compile:

https://github.com/hu5970/UFS_UTILS/tree/fvcom_32bit/tests/fvcom_tools

[GeorgeGayno-NOAA]

Unit test won't compile.

[hu5970]

@GeorgeGayno-NOAA Could you tell me how to find error message?

[GeorgeGayno-NOAA]

@GeorgeGayno-NOAA Could you tell me how to find error message?

In the build_all.sh script, set -DBUILD_TESTING=ON.

[GeorgeGayno-NOAA]

@hu5970 What is the status of this?

[hu5970]

@GeorgeGayno-NOAA George, I am on vacation this week and next week. I will try "-DBUILD_TESTING=ON" if I have time but my response will be slow. Thanks, Ming

[GeorgeGayno-NOAA]

@GeorgeGayno-NOAA George, I am on vacation this week and next week. I will try "-DBUILD_TESTING=ON" if I have time but my response will be slow. Thanks, Ming

It is working now.

[dmwright526]

Thanks for the changes, @hu5970! It looks like it is passing the unit test.

[GeorgeGayno-NOAA]

@hu5970 Let me do a few final checks. Then, we can merge.

[GeorgeGayno-NOAA]

All comments addressed by developer. All tests passed. Will merge.

[hu5970]

@GeorgeGayno-NOAA @dmwright526 Thanks. Ming