Building coupled WRF/WRF Hydro models fails when choosing configuration INTEL (ifort/icc): HSW/BDW. This appears to be caused by an incomplete #ARCH specification in line 1832 of file arch/configure.defaults, which does not specify ifort as Fortran compiler. Script arch/Config.pl hands over this compiler description to WRF Hydro script hydro/wrf_hydro_config, which unsuccessfully scans the compiler specification for compiler names such as gfortran or ifort. WRF Hydro configuration fails quietly, and the WRF build will stop with missing file hydro/Makefile.comm when trying to build WRF Hydro.

The problem could be fixed by replacing line 1832 in arch/configure.defaults with something like
#ARCH Linux x86_64 ppc64le i486 i586 i686, ifort compiler with icc #serial smpar dmpar dm+sm
I did not create a pull request as I wasn't sure which conventions are used for such descriptions.

To Reproduce
Steps to reproduce the behavior:

1. git clone https://github.com/NCAR/wrf_hydro_nwm_public.git
2. In WRF top directory: rm -r hydro; cp -r ../wrf_hydro_nwm_public/trunk/NDHMS hydro
3. Run configure script, choosing one of the INTEL (ifort/icc): HSW/BDW configurations, e.g., dmpar
4. Build WRF

The build will fall over with an error when it reaches the WRF Hydro sources, with make complaining about missing file hydro/Makefile.comm, which should have been created during the configure stage as explained above.