Build error in MPAS with AMD compiler on frontier

[ndkeen]

The test SMS.ne4pg2_oQU480.WCYCLXX2010.frontier-scream-gpu_craygnuamdgpu
fails to build on frontier.

/lustre/orion/cli115/proj-shared/noel/e3sm_scratch/c01-jan9/kc.ne256pg2_oRRS18to6v3.WCYCLXX2010.c01-jan9.2d.n032.sk/build/cmake-bld/core_ocean/analysis_members/mpas_ocn_okubo_weiss.f90:80:21:

   80 |          type(c_ptr), value       :: array
      |                     1
Error: Type name 'c_ptr' at (1) is ambiguous
/lustre/orion/cli115/proj-shared/noel/e3sm_scratch/c01-jan9/kc.ne256pg2_oRRS18to6v3.WCYCLXX2010.c01-jan9.2d.n032.sk/build/cmake-bld/core_ocean/analysis_members/mpas_ocn_okubo_weiss.f90:83:24:

   83 |          type(c_funptr), value    :: compare ! int (*compare)(const void*, const void*)
      |                        1
Error: Type name 'c_funptr' at (1) is ambiguous
/lustre/orion/cli115/proj-shared/noel/e3sm_scratch/c01-jan9/kc.ne256pg2_oRRS18to6v3.WCYCLXX2010.c01-jan9.2d.n032.sk/build/cmake-bld/core_ocean/analysis_members/mpas_ocn_okubo_weiss.f90:1152:87:

 1152 |       call qsort(c_loc(stats(1)), elemCount, elemSize, c_funloc(compareRealDescending))
      |                                                                                       1
Error: Type mismatch in argument 'array' at (1); passed TYPE(c_ptr) to REAL(4)
/lustre/orion/cli115/proj-shared/noel/e3sm_scratch/c01-jan9/kc.ne256pg2_oRRS18to6v3.WCYCLXX2010.c01-jan9.2d.n032.sk/build/cmake-bld/core_ocean/analysis_members/mpas_ocn_okubo_weiss.f90:1152:87:

 1152 |       call qsort(c_loc(stats(1)), elemCount, elemSize, c_funloc(compareRealDescending))
      |                                                                                       1
Error: Type mismatch in argument 'compare' at (1); passed TYPE(c_funptr) to REAL(4)
Target CMakeFiles/ocn.dir/__/__/core_ocean/analysis_members/mpas_ocn_okubo_weiss.f90.o built in 0.640616 seconds
make[2]: *** [mpas-framework/src/CMakeFiles/ocn.dir/build.make:3029: mpas-framework/src/CMakeFiles/ocn.dir/__/__/core_ocean/analysis_members/mpas_ocn_okubo_weiss.f90.o] Error 1
make[2]: Leaving directory '/lustre/orion/cli115/proj-shared/noel/e3sm_scratch/c01-jan9/kc.ne256pg2_oRRS18to6v3.WCYCLXX2010.c01-jan9.2d.n032.sk/build/cmake-bld'
make[1]: *** [CMakeFiles/Makefile2:1703: mpas-framework/src/CMakeFiles/ocn.dir/all] Error 2
make[1]: *** Waiting for unfinished jobs....

I verified that the test builds with the cray compiler (very slowly)

SMS.ne4pg2_oQU480.WCYCLXX2010.frontier-scream-gpu_crayclang-scream

It also build with GNU compiler on pm-gpu

[trey-ornl]

craygnuamdgpu also uses the Gnu compiler for Fortran. Maybe pm-gpu has a compiler option that craygnuamdgpu does not?
My guess is that there is a missing use iso_c_binding that one build assumes but the other does not.

[trey-ornl]

Updated guess. craygnuamdgpu might need to add the Fortran option -std=f2003 or -std=f2008, so the import statement is supported correctly?