In coupler/Makefile, the src file of atmos_ocean_dep_fluxes_calc.o is $(SRCROOT)FMScoupler/full/atmos_ocean_dep_fluxes_calc.f90, but the src file's postfix is F90, not f90. It would throw errors when I built with Dockerfile.gnu.
It is the same with atmos_ocean_fluxes_calc.o.