add werror to extbuild

[jedwards4b]

Description of changes

Add werror to github testing - no gfortran warnings allowed.

Specific notes

Contributors other than yourself, if any:

CMEPS Issues Fixed (include github issue #):

Are changes expected to change answers? (specify if bfb, different at roundoff, more substantial)
BFB
Any User Interface Changes (namelist or namelist defaults changes)? NO

Testing performed

Testing performed if application target is CESM:

• (recommended) CIME_DRIVER=nuopc scripts_regression_tests.py
  • machines:
  • details (e.g. failed tests):
• (recommended) CESM testlist_drv.xml
  • machines and compilers:
  • details (e.g. failed tests):
• (optional) CESM prealpha test
  • machines and compilers cheyenne, intel, gnu, github testing.
  • details (e.g. failed tests):
• (other) please described in detail
  • machines and compilers
  • details (e.g. failed tests):

Testing performed if application target is UFS-coupled:

• (recommended) UFS-coupled testing
  • description:
  • details (e.g. failed tests):

Testing performed if application target is UFS-HAFS:

• (recommended) UFS-HAFS testing
  • description:
  • details (e.g. failed tests):

Hashes used for testing:

• CESM:
  • repository to check out: https://github.com/ESCOMP/CESM.git
  • branch/hash: cesm2_3_beta11
• UFS-coupled, then umbrella repostiory to check out and associated hash:
  • repository to check out:
  • branch/hash:
• UFS-HAFS, then umbrella repostiory to check out and associated hash:
  • repository to check out:
  • branch/hash:

[jedwards4b]

I will run cesm prealphas with this + CDEPS ESCOMP/CDEPS#207

[jedwards4b]

@uturuncoglu could you also review this one?

[uturuncoglu]

@jedwards4b maybe I could test both of them in the same time.

[jedwards4b]

Yes - please do!

[DeniseWorthen]

@uturuncoglu What testing are you planning? I don't want to replicate anything you were going to do on UFS.

[uturuncoglu]

@DeniseWorthen Since i need to test CDEPS PR. I think that could run couple of coupled test but if you want to run the entire RT against this PR please go ahead and I could test CDEPS seperately.

[DeniseWorthen]

@uturuncoglu Sure, will do.

[DeniseWorthen]

All UFS tests passed.