CESM with COMP_INTERFACE=ESMF compilation failing

[jgarciapintado@marum_de]

Hello,
I have the compilation problem with CESM 1.2.2:

.../ocn_comp_mct.F90(8): error #6405: The same named entity from different modules an
d/or program units cannot be referenced.   [R8]
   use shr_kind_mod, only: CS=>shr_kind_CS, IN=>shr_kind_IN, R8=>shr_kind_R8

When using ESMF as coupling libraries. From what I understand, the problem comes as .../
cesm1_2_2/models/ocn/pop2/drivers/cpl_esmf/ocn_comp.mct.F90 contains:

   use ocn_comp_esmf

And then, the corresponding module (ocn_comp_esmf.F90) contains

   use kinds_mod,         only: int_kind, r8

where, in kinds_mod.F90 it is also declared a non-standard double real as:

      r8             = selected_real_kind(13)

So, I thought that maybe modifying that line kinds_mod.F90 to
      r8             = selected_real_kind(13)

and then modifying the line in ocn_comp_mct.F90 to
   use shr_kind_mod, only: CS=>shr_kind_CS, IN=>shr_kind_IN

could work. But without a deeper look into the code I am wondering if this makes sense at all.

Please, could you help?

Best wishes,
Javier Garcia-Pintado

 

[jedwards]

That would probably be fine,  another approach would be to add an 'only' clause to the 'use ocn_comp_esmf' statement so that the r8 is not imported from that module.