# +-======-+ 
#  Copyright (c) 2003-2018 United States Government as represented by 
#  the Admistrator of the National Aeronautics and Space Administration.  
#  All Rights Reserved.
#  
#  THIS OPEN  SOURCE  AGREEMENT  ("AGREEMENT") DEFINES  THE  RIGHTS  OF USE,
#  REPRODUCTION,  DISTRIBUTION,  MODIFICATION AND REDISTRIBUTION OF CERTAIN 
#  COMPUTER SOFTWARE ORIGINALLY RELEASED BY THE UNITED STATES GOVERNMENT AS 
#  REPRESENTED BY THE GOVERNMENT AGENCY LISTED BELOW ("GOVERNMENT AGENCY").  
#  THE UNITED STATES GOVERNMENT, AS REPRESENTED BY GOVERNMENT AGENCY, IS AN 
#  INTENDED  THIRD-PARTY  BENEFICIARY  OF  ALL  SUBSEQUENT DISTRIBUTIONS OR 
#  REDISTRIBUTIONS  OF THE  SUBJECT  SOFTWARE.  ANYONE WHO USES, REPRODUCES, 
#  DISTRIBUTES, MODIFIES  OR REDISTRIBUTES THE SUBJECT SOFTWARE, AS DEFINED 
#  HEREIN, OR ANY PART THEREOF,  IS,  BY THAT ACTION, ACCEPTING IN FULL THE 
#  RESPONSIBILITIES AND OBLIGATIONS CONTAINED IN THIS AGREEMENT.
#  
#  Government Agency: National Aeronautics and Space Administration
#  Government Agency Original Software Designation: GSC-15354-1
#  Government Agency Original Software Title:  GEOS-5 GCM Modeling Software
#  User Registration Requested.  Please Visit http://opensource.gsfc.nasa.gov
#  Government Agency Point of Contact for Original Software:  
#  			Dale Hithon, SRA Assistant, (301) 286-2691
#  
# +-======-+ 
  ######################
  #                    #
  #    MPI Defaults    #
  #                    #
  ######################

  ifdef I_MPI_ROOT
      FC := mpiifort
      INC_MPI := $(I_MPI_ROOT)/include64
      LIB_MPI := -L$(I_MPI_ROOT)/lib64 -lmpifort -lmpi -lmpigi # Intel MPI
      LIB_MPI_OMP := -L$(I_MPI_ROOT)/lib64 -lmpifort -lmpi_mt -lmpigi # Intel MPI
  else
  ifdef OPENMPI
      FC := mpifort
      INC_MPI := $(OPENMPI)/include
      OPENMPI_LINK_FLAGS := $(shell mpif90 -showme:link)
      OPENMPI_CXX_LINK_FLAGS := $(shell mpicxx -showme:link)
      LIB_MPI := -L$(OPENMPI)/lib $(OPENMPI_LINK_FLAGS) $(OPENMPI_CXX_LINK_FLAGS)
  else
  ifdef MVAPICH2
      FC := mpif90
      INC_MPI := $(MVAPICH2)/include
      LIB_MPI := -L$(MVAPICH2)/lib  -lmpich
  else
  ifdef MPICH
      FC := mpifort
      INC_MPI := $(MPICH)/include
      LIB_MPI := -L$(MPICH)/lib  -lmpifort -lmpi
  else
  ifdef M_MPI_ROOT
      FC := mpif90
      INC_MPI := $(M_MPI_ROOT)/include
      LIB_MPI := -L$(M_MPI_ROOT)/lib  -lmpich
  else
  ifdef MPI_HOME
      FC := mpif90
      INC_MPI := $(MPI_HOME)/include
      LIB_MPI := -L$(MPI_HOME)/lib  -lmpich
  else
  # This detects the MPT setup at NCCS
  ifdef MPT_VERSION
      FC := mpif90
      INC_MPI := $(MPI_ROOT)/include
      LIB_MPI := -L$(MPI_ROOT)/lib  -lmpi -lmpi++
  else
  ifdef FPATH
      FC := mpif90 
      INC_MPI := $(dir $(shell which mpiexec_mpt))../include
      LIB_MPI := -L$(subst include,lib,$(INC_MPI)) -lmpi -lmpi++
  # All fails, assume Open MPI
  else
      FC := mpifort

      OPENMPI :=   $(shell ompi_info --parsable --path prefix | cut -d: -f3)
      INC_MPI :=   $(shell ompi_info --parsable --path incdir | cut -d: -f3)
      LIB_MPI := -L$(shell ompi_info --parsable --path libdir | cut -d: -f3)

      OPENMPI_LINK_FLAGS := $(shell mpif90 -showme:link)
      OPENMPI_CXX_LINK_FLAGS := $(shell mpicxx -showme:link)
      LIB_MPI += $(OPENMPI_LINK_FLAGS) $(OPENMPI_CXX_LINK_FLAGS)

  endif # FPATH
  endif # MPT_VERSION
  endif # MPI_HOME
  endif # M_MPI_ROOT
  endif # MPICH
  endif # MVAPICH2
  endif # OPENMPI
  endif # I_MPI_ROOT