configure

#!/bin/bash

echo ""
NETCDF_DIR=""
USE_CXX=""
while [[ ! -z $1 ]] ; do
  case "$1" in
    "gnu" )  echo "Using GNU compilers." ; USE_CXX=g++ ;;
    "intel") echo "Using Intel compilers." ; USE_CXX=icpc ;;
    "--with-netcdf" ) shift ; NETCDF_DIR=$1 ;;
    "-h" | "--help" )
      echo "Configure options:"
      echo "    gnu                : Use GNU compilers (g++)"
      echo "    intel              : Use Intel compilers (icpc)"
      echo "    --with-netcdf <dir>: Set NetCDF location to <dir>"
      echo "    -h | --help        : Show this message."
      echo "  ENVIRONMENT VARIABLES"
      echo "    CXX                : C++ compiler (overrides any specified)"
      echo "    CXXFLAGS           : C++ compiler flags"
      echo "    LDFLAGS            : Linker flags"
      echo ""
      exit 0
      ;;
    * ) echo "Unrecognized option: $1" > /dev/stderr ; exit 1 ;;
  esac
  shift
done

# Compiler setup
if [[ ! -z $CXX ]] ; then
  if [[ ! -z $USE_CXX ]] ; then
    echo "Warning: CXX is already set to $CXX. Using $CXX."
  fi
else
  if [[ -z $USE_CXX ]] ; then
    echo "Defaulting to GNU compilers."
    USE_CXX=g++
  fi
  CXX=$USE_CXX
fi

# NetCDF location setup
if [[ ! -z $NETCDF_DIR ]] ; then
  echo "Using NetCDF in $NETCDF_DIR"
  NETCDF_LIB_DIR="-L$NETCDF_DIR/lib"
  NETCDF_INC_DIR="-I$NETCDF_DIR/include"
fi

# Generate config.h
cat > config.h <<EOF
# Configuration file for closest
CXX=$CXX

CXXFLAGS=$CXXFLAGS

LDFLAGS=-lnetcdf $LD_FLAGS

DEFINES=-DBINTRAJ -D_LARGEFILE_SOURCE -D_FILE_OFFSET_BITS=64

NETCDF_LIB_DIR=$NETCDF_LIB_DIR
NETCDF_INC_DIR=$NETCDF_INC_DIR
EOF
echo "Cleaning any previous compile."
make clean
echo "Configure complete."
echo ""
exit 0