#!/bin/bash
#
# $Header: /u/gcmpack/MITgcm/tools/build_options/darwin_ia32_gfortran,v 1.16 2013/07/22 18:40:45 jmc Exp $
# $Name:  $

# Tested on MacBook Pro with Snow Leopard
#- on 20-Nov-2009, without MPI:
#    gcc and gfortran obtained from
# http://hpc.sourceforge.net/
# http://prdownloads.sourceforge.net/hpc/gcc-snwleo-intel-bin.tar.gz?download
# http://prdownloads.sourceforge.net/hpc/gfortran-snwleo-intel-bin.tar.gz?download
#
#    gfortran (version 4.6.0)
#    OpenMPI (version 1.4.3)

#-- Note: default location of NetCDF & MPI setting provided in this optfile
#         are not standard. For this reason, you might need:
#    1) to set NETCDF_ROOT to where the NetCDF is installed, e.g.:
#       export NETCDF_ROOT='/usr/NetCDF'
#    2) for MPI, to set environment variable MPI_INC_DIR to the include
#       directory of your MPI implementation

if test "x$MPI" = xtrue ; then
# CC=mpicc
  FC=mpif90
  LINK=$FC
else
# CC=gcc
  FC=gfortran
  LINK=$FC
fi

#FC_NAMEMANGLE="#define FC_NAMEMANGLE(X) _ ## X ## _"
#FC_NAMEMANGLE="#define FC_NAMEMANGLE(X) X"
#FC_NAMEMANGLE="#define FC_NAMEMANGLE(X) X ## _"
# for adjoint runs we might need this
#MAKEDEPEND=tools_xmakedepend

S64='$(TOOLSDIR)/set64bitConst.sh'
DEFINES='-DWORDLENGTH=4 -DNML_TERMINATOR'
CPP='/usr/bin/cpp -traditional -P'
EXTENDED_SRC_FLAG='-ffixed-line-length-132'

#Following flag is needed when using 32-bit gfortran with 64-bit gcc,
#as can be the case right after switching to Snow Leopard.
#CFLAGS='-arch i386'

NOOPTFLAGS='-O0'
NOOPTFILES=''

FFLAGS="$FFLAGS -fsecond-underscore -fconvert=big-endian"
#- might want to use '-fdefault-real-8' for fizhi pkg:
#FFLAGS="$FFLAGS -fdefault-real-8 -fdefault-double-8"

if test "x$IEEE" = x ; then     #- with optimisation:
    FFLAGS="$FFLAGS -Wunused -Wuninitialized"
    FOPTIM='-O3 -funroll-loops'
    NOOPTFLAGS='-O2 -funroll-loops'
# do we still need these?
#    NOOPTFILES="$NOOPTFILES gad_c4_adv_x.F gad_u3_adv_x.F"
# add more optimization if you are bold enough
#    FOPTIM="$FOPTIM -ftree-vectorize"
# with gcc version 4.6.0 20101106 (experimental) (GCC) I needed this
# for better optimization (with bugs), more recent versions of gfortran
# might not need this any longer
#    FOPTIM='-O3 -funroll-loops -ftree-vectorize'
#    NOOPTFLAGS='-O1 -funroll-loops -ftree-vectorize'
#    NOOPTFILES='exch2_uv_agrid_3d_r4.F exch2_uv_agrid_3d_r8.F exch2_uv_agrid_3d_rl.F exch2_uv_agrid_3d_rs.F exch2_uv_bgrid_3d_r4.F exch2_uv_cgrid_3d_r4.F exch2_uv_cgrid_3d_r8.F exch2_uv_cgrid_3d_rl.F exch2_uv_cgrid_3d_rs.F exch_uv_agrid_3d_r8.F exch_uv_agrid_3d_rl.F exch_uv_agrid_3d_rs.F'
else                            #- no optimisation + IEEE :
    FFLAGS="$FFLAGS -Wunused -ffloat-store"
    FOPTIM='-O0'
fi

INCLUDEDIRS=''
INCLUDES=''
LIBS=''

NETCDF_ROOT=/usr/local
if [ "x$NETCDF_ROOT" != x ] ; then
    INCLUDES="-I${NETCDF_ROOT}/include"
    LIBS="-L${NETCDF_ROOT}/lib"
else
    #-- default NetCDF location: from former darwin_ia32_gfortran optfile:
    #   If you optain netcdf libraries from fink, this is where they will
    #   be. I found that it is easier to get everything from
    #   sourceforge.net, then the libraries will be in /usr/local
    INCLUDES='-I/sw/include'
    LIBS='-L/sw/lib'
fi

if [ -n "$MPI_INC_DIR" -a "x$MPI" = xtrue ] ; then
    INCLUDES="$INCLUDES -I$MPI_INC_DIR"
    #- used for parallel (MPI) DIVA
    MPIINCLUDEDIR="$MPI_INC_DIR"
   #MPI_HEADER_FILES='mpif.h mpiof.h'
elif [ "x$MPI" = xtrue ] ; then
    #-- default MPI header location: from former darwin_ia32_gfortran+mpi optfile:
    INCLUDES="$INCLUDES -I/usr/local/include -I/opt/openmpi/include"
    LIBS="$LIBS -L/usr/local/lib"
fi