#!/bin/bash
  VER=1.10
  if [ ! -f liblbfgs-$VER.tar.gz ]; then
    wget https://github.com/downloads/chokkan/liblbfgs/liblbfgs-$VER.tar.gz
  fi
  
  tar -xzf liblbfgs-$VER.tar.gz
  cd liblbfgs-$VER
  ./configure --prefix=`pwd`
  make
  # due to the liblbfgs project directory structure, we have to use -i
  # but the erros are completely harmless
  make -i install
  cd ..
  
  (
    [ ! -z "${LIBLBFGS}" ] && \
      echo >&2 "LIBLBFGS variable is aleady defined. Undefining..." && \
      unset LIBLBFGS
  
    [ -f ./env.sh ] && . ./env.sh
  
    [ ! -z "${LIBLBFGS}" ] && \
      echo >&2 "libLBFGS config is already in env.sh" && exit
  
    wd=`pwd`
    wd=`readlink -f $wd || pwd`
  
    echo "export LIBLBFGS=$wd/liblbfgs-1.10"
    echo export LD_LIBRARY_PATH='${LD_LIBRARY_PATH:-}':'${LIBLBFGS}'/lib/.libs
  ) >> env.sh