#!/bin/bash
#
#  $Header: /u/gcmpack/MITgcm/tools/build_options/linux_amd64_ifort,v 1.10 2013/07/22 18:40:45 jmc Exp $
#  $Name:  $
#
# Composed and tested by ce107 on ross/weddell (Opteron system)
# Should work fine on EM64T and other AMD64 compatible Intel systems
# a) Processor specific flags:
#    1) for more speed on Core2 processors replace -xW with -xT
#    2) for more speed on Pentium4 based EM64T processors replaces -xW with -xP
# b) For more speed, provided your data size doesn't exceed 2GB you can
# remove -fPIC which carries a performance penalty of 2-6%.
# c) Provided that the libraries you link to are compiled with -fPIC this
# optfile should work.
# d) You can replace -fPIC with -mcmodel=medium which may perform faster
# than -fPIC and still support data sizes over 2GB per process but all
# the libraries you link to must be compiled with -fPIC or -mcmodel=medium
# e) Changed from -O3 to -O2 to avoid buggy Intel v.10 compilers. Speed
# impact appears to be minimal.
#
# MPI : DON'T FORGET to set environment variable MPI_INC_DIR to the include
#       directory of your MPI implementation

#-------
# run with OpenMP: needs to set environment var. OMP_NUM_THREADS
#    and generally, needs to increase the stack-size:
#   -  sh,bash:
#     > export OMP_NUM_THREADS=2
#     > export KMP_STACKSIZE=400m
#   - csh,tcsh:
#     > setenv OMP_NUM_THREADS 2
#     > setenv KMP_STACKSIZE 400m
#  NOTE: with MPI+OpenMP, need to set KMP_STACKSIZE in ~/.tcshrc (but curiously,
#        works without OMP_NUM_THREADS in ~/.tcshrc).
#-------

if test "x$MPI" = xtrue ; then
  CC=mpicc
  FC=mpif77
  F90C=mpif90
  LINK="$F90C -i-dynamic -no-ipo"
else
  CC=icc
  FC=ifort
  F90C=ifort
  LINK="$F90C -i-dynamic -no-ipo"
fi

DEFINES='-DWORDLENGTH=4'
CPP='cpp -traditional -P'
F90FIXEDFORMAT='-fixed -Tf'
EXTENDED_SRC_FLAG='-132'
GET_FC_VERSION="--version"
OMPFLAG='-openmp'

NOOPTFLAGS='-O0 -g'
NOOPTFILES=''

FFLAGS="$FFLAGS -w95 -W0 -WB -convert big_endian -assume byterecl"
FFLAGS="$FFLAGS -fPIC"
#- might want to use '-r8' for fizhi pkg:
#FFLAGS="$FFLAGS -r8"

if test "x$IEEE" = x ; then     #- with optimisation:
    FOPTIM='-O2 -align -xW -ip'
else
  if test "x$DEVEL" = x ; then  #- no optimisation + IEEE :
    # "-mp" is for ieee "maintain precision"
    FOPTIM='-O0 -noalign -xW -ip -mp'
  else                          #- development/check options:
    FFLAGS="$FFLAGS -warn all -warn nounused"
    FOPTIM="-fpe0 -fpstkchk -fpmodel except -check all -ftrapuv"
    FOPTIM="$FOPTIM -O0 -noalign -g -traceback"
  fi
fi

F90FLAGS=$FFLAGS
F90OPTIM=$FOPTIM
CFLAGS='-O0 -ip -fPIC'

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

if [ "x$NETCDF_ROOT" != x ] ; then
    INCLUDEDIRS="${NETCDF_ROOT}/include"
    INCLUDES="-I${NETCDF_ROOT}/include"
    LIBS="-L${NETCDF_ROOT}/lib"
elif [ "x$NETCDF_HOME" != x ]; then
    INCLUDEDIRS="${NETCDF_HOME}/include"
    INCLUDES="-I${NETCDF_HOME}/include"
    LIBS="-L${NETCDF_HOME}/lib"
elif [ "x$NETCDF_INC" != x -a "x$NETCDF_LIB" != x ]; then
    NETCDF_INC=`echo $NETCDF_INC | sed 's/-I//g'`
    NETCDF_LIB=`echo $NETCDF_LIB | sed 's/-L//g'`
    INCLUDEDIRS="${NETCDF_INC}"
    INCLUDES="-I${NETCDF_INC}"
    LIBS="-L${NETCDF_LIB}"
elif [ "x$NETCDF_INCDIR" != x -a "x$NETCDF_LIBDIR" != x ]; then
    INCLUDEDIRS="${NETCDF_INCDIR}"
    INCLUDES="-I${NETCDF_INCDIR}"
    LIBS="-L${NETCDF_LIBDIR}"
elif test -d /usr/include/netcdf-3 ; then
    INCLUDEDIRS='/usr/include/netcdf-3'
    INCLUDES='-I/usr/include/netcdf-3'
    LIBS='-L/usr/lib/netcdf-3 -L/usr/lib64/netcdf-3'
elif test -d /usr/include/netcdf ; then
    INCLUDEDIRS='/usr/include/netcdf'
    INCLUDES='-I/usr/include/netcdf'
elif test -d /usr/local/netcdf ; then
    INCLUDEDIRS='/usr/include/netcdf/include'
    INCLUDES='-I/usr/local/netcdf/include'
    LIBS='-L/usr/local/netcdf/lib'
elif test -d /usr/local/include/netcdf.inc ; then
    INCLUDEDIRS='/usr/local/include'
    INCLUDES='-I/usr/local/include'
    LIBS='-L/usr/local/lib64'
fi

if [ -n "$MPI_INC_DIR" -a "x$MPI" = xtrue ] ; then
    INCLUDES="$INCLUDES -I$MPI_INC_DIR"
    INCLUDEDIRS="$INCLUDEDIRS $MPI_INC_DIR"
    #- used for parallel (MPI) DIVA
    MPIINCLUDEDIR="$MPI_INC_DIR"
   #MPI_HEADER_FILES='mpif.h mpiof.h'
fi