#!/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"
else
  CC=gcc
  FC=f95
  F90C=f95
  LINK="$F90C -i-dynamic"
fi

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

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

FFLAGS="$FFLAGS -fconvert=swap -m64"
FFLAGS="$FFLAGS -fPIC"
FOPTIM='-O2'

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

INCLUDEDIRS=''
INCLUDES=''
LIBS='-L/usr/lib64'