#!/bin/sh
#
# Configuration script, to be run before making examples
#
# Author: M. Kirsanov

#
# User-changeable part -------------------------------
#

#LCG platform. Can be needed if external libraries are specified
if [ x$MYLCGPLATFORM = x ]; then
  export MYLCGPLATFORM=x86_64-slc5-gcc43-opt
fi

# Defaults
export COMPMODE=OPT
export PYTHIA8LOCATION=..

# check arguments

for arg in $* ; do
  if [ "x$arg" = "x--enable-debug" ] ; then
    COMPMODE=DBG
  elif [ "x$arg" = "x--enable-shared" ] ; then
    SHAREDLIBS=yes
  elif [ "x$arg" = "x--help" ] ; then
    echo "Usage: ./configure [options] , where options are:"
    echo "--help                   : prints this help"
    echo "--enable-debug           : turns on debugging flags and turns off optimization"
    echo "--enable-shared          : use shared library (not yet implemented) (default no)"
    echo "--lcgplatform=name       : LCG platform name, default is slc4_ia32_gcc34"
    echo "--with-pythia8=p8path    : path to pythia8 installation dir to find libs, includes and pars (default is ..)"
    echo "--with-lhapdf=lhapdfpath : path to LHAPDF libraries dir (LHAPDF must be version 5.3 or higher)"
    echo "--with-lhapdfversion=v   : LHAPDF version (simplified alternative when using CERN AFS MCGenerators, e.g. =5.5.1.a)"
    echo "--with-lhapdflibname=n   : lhapdf library name line (default is -lLHAPDF)"
    echo "--with-lhapdfsets=path   : path to LHAPDF data (default is lhapdfpath/../PDFsets, CERN AFS default is lhapdfpath/../../../share/PDFsets)"
    echo "--with-fastjet=path      : path to fastjet (default = /usr/local)"
    echo "--with-fastjetversion=v  : fastjet version (simplified alternative when using CERN AFS external, e.g. =2.3.3)"
    exit
  elif [ x`echo x${arg} | grep "="` != x ] ; then
    option=`echo ${arg} | awk -F = '{print $1}'`
    value=`echo ${arg} | awk -F = '{print $2}'`
    if [ "x${option}" = "x--lcgplatform" ] ; then
      MYLCGPLATFORM=${value}
    elif [ "x${option}" = "x--with-pythia8" ] ; then
      PYTHIA8LOCATION=${value}
    elif [ "x${option}" = "x--with-lhapdfversion" ] ; then
      LHAPDFVERSION=${value}
    elif [ "x${option}" = "x--with-lhapdf" ] ; then
      LHAPDFLOCATION=${value}
    elif [ "x${option}" = "x--with-lhapdflibname" ] ; then
      LHAPDFLIBNAME=${value}
    elif [ "x${option}" = "x--with-lhapdfsets" ] ; then
      LHAPDFSETSLOCATION=${value}
    elif [ "x${option}" = "x--with-fastjetversion" ] ; then
      FASTJETVERSION=${value}
    elif [ "x${option}" = "x--with-fastjet" ] ; then
      FASTJETLOCATION=${value}
    else
      echo "${arg}: wrong option. Ignored." >&2
    fi
  else
    echo "${arg}: wrong option. Ignored." >&2
  fi
done

echo compilation mode is $COMPMODE


# LHAPDF location
# The default values here correspond to CERN AFS (but you may want to change
# the version and/or platform).

if [ x${LHAPDFLOCATION} != x ]; then
  if [ x${LHAPDFSETSLOCATION} = x ]; then
    export LHAPDFSETSLOCATION=${LHAPDFLOCATION}/../PDFsets
    if [ ! -d ${LHAPDFSETSLOCATION} ]; then
      export LHAPDFSETSLOCATION=${LHAPDFLOCATION}/../../share/lhapdf/PDFsets
    fi
    if [ ! -d ${LHAPDFSETSLOCATION} ]; then
      export LHAPDFSETSLOCATION=${LHAPDFLOCATION}/../share/lhapdf/PDFsets
    fi
    if [ ! -d ${LHAPDFSETSLOCATION} ]; then
      export LHAPDFSETSLOCATION=${LHAPDFLOCATION}/../../../share/lhapdf/PDFsets
    fi
  fi
fi
if [ x${LHAPDFVERSION} = x ]; then
  export LHAPDFVERSION=5.7.0
else
  if [ x${LHAPDFLOCATION} = x ]; then
    export LHAPDFLOCATION=/afs/cern.ch/sw/lcg/external/MCGenerators/lhapdf/${LHAPDFVERSION}/${MYLCGPLATFORM}/lib/archive
    if [ x${LHAPDFSETSLOCATION} = x ]; then
      export LHAPDFSETSLOCATION=/afs/cern.ch/sw/lcg/external/MCGenerators/lhapdf/${LHAPDFVERSION}/share/PDFsets
    fi
  fi
fi
if [ x${LHAPDFLOCATION} = x ]; then
  export LHAPDFLOCATION=/afs/cern.ch/sw/lcg/external/MCGenerators/lhapdf/${LHAPDFVERSION}/${MYLCGPLATFORM}/lib/archive
fi
if [ x${LHAPDFLIBNAME} = x ]; then
  export LHAPDFLIBNAME="-lLHAPDF"
fi
if [ x${LHAPDFSETSLOCATION} = x ]; then
  export LHAPDFSETSLOCATION=/afs/cern.ch/sw/lcg/external/MCGenerators/lhapdf/${LHAPDFVERSION}/share/PDFsets
fi

# Fastjet location
if [ x${FASTJETVERSION} != x ]; then
  export FASTJETLOCATION=/afs/cern.ch/sw/lcg/external/fastjet/${FASTJETVERSION}/${MYLCGPLATFORM}
fi
if [ x${FASTJETLOCATION} = x ]; then
  export FASTJETLOCATION=/usr/local
fi

#
# User-changeable part, experts  -----------------------------
#

# export FFLAGS_OPT="-O2 -Wuninitialized"
# -Wuninitialized outputs many irrelevant warnings and therefore obscurs 
export FFLAGS_OPT="-O2"
export FFLAGS_DBG=-g
export CFLAGS_OPT=-O2
export CFLAGS_DBG=-g
export CXXFLAGS_OPT="-O2 -ansi -pedantic -W -Wall"
export CXXFLAGS_DBG="-g -ansi -pedantic -W -Wall"
#
# Find platform.
#
export ARCH0="`uname`"
export ARCH=${ARCH0}
export theGcc=`g++ --version | head -n 1 | awk '{print$3}' | awk -F . '{print $1}'`
if [ ${theGcc} = 4 ]; then
  export ARCH=${ARCH}-gcc4
fi
echo Platform is $ARCH

#default platform settings:
if [ x$FC = x ]; then
  export FC=g77
fi
if [ x$CC = x ]; then
  export CC=gcc
fi
export FFLAGS="${FFLAGS_OPT}"
export CFLAGS="${CFLAGS_OPT}"
export CXXFLAGS="${CXXFLAGS_OPT}"
export FLIBS="-lfrtbegin -lg2c"
if [ ${COMPMODE} = OPT ]; then
  export FFLAGS="${FFLAGS_OPT}"
  export CFLAGS="${CFLAGS_OPT}"
  export CXXFLAGS="${CXXFLAGS_OPT}"
fi
if [ ${COMPMODE} = DBG ]; then
  export FFLAGS="${FFLAGS_DBG}"
  export CFLAGS="${CFLAGS_DBG}"
  export CXXFLAGS="${CXXFLAGS_DBG}"
fi
if [ $ARCH = Linux ]; then
  if [ x$FC = x ]; then
    export FC=g77
  fi
  export FFLAGS="${FFLAGS_OPT} -Wno-globals"
  export CFLAGS="${CFLAGS_OPT}"
  export CXXFLAGS="${CXXFLAGS_OPT}"
  export FLIBS="-lfrtbegin -lg2c"
  if [ ${COMPMODE} = OPT ]; then
    export FFLAGS="${FFLAGS_OPT}"
    export CFLAGS="${CFLAGS_OPT}"
    export CXXFLAGS="${CXXFLAGS_OPT}"
  fi
  if [ ${COMPMODE} = DBG ]; then
    export FFLAGS="${FFLAGS_DBG} -Wno-globals"
    export CFLAGS="${CFLAGS_DBG}"
    export CXXFLAGS="${CXXFLAGS_DBG}"
  fi
fi
# Linux platform with gcc4: new Fortran90 compiler.
if [ $ARCH = Linux-gcc4 ]; then
  if [ x$FC = x ]; then
    export FC=gfortran
  fi
  export FFLAGS="${FFLAGS_OPT}"
  export CFLAGS="${CFLAGS_OPT}"
  export CXXFLAGS="${CXXFLAGS_OPT}"
  export FLIBS="-lgfortran -lgfortranbegin"
  if [ ${COMPMODE} = OPT ]; then
    export FFLAGS="${FFLAGS_OPT}"
    export CFLAGS="${CFLAGS_OPT}"
    export CXXFLAGS="${CXXFLAGS_OPT}"
  fi
  if [ ${COMPMODE} = DBG ]; then
    export FFLAGS="${FFLAGS_DBG}"
    export CFLAGS="${CFLAGS_DBG}"
    export CXXFLAGS="${CXXFLAGS_DBG}"
  fi
fi
# Mac-OSX with gcc4
if [ $ARCH = Darwin-gcc4 ]; then
  if [ x$FC = x ]; then
    export FC=gfortran
  fi
  export FFLAGS="${FFLAGS_OPT}"
  export CFLAGS="${CFLAGS_OPT}"
  export CXXFLAGS="${CXXFLAGS_OPT}"
  export FLIBS="-lgfortran"
  if [ ${COMPMODE} = OPT ]; then
    export FFLAGS="${FFLAGS_OPT}"
    export CFLAGS="${CFLAGS_OPT}"
    export CXXFLAGS="${CXXFLAGS_OPT}"
  fi
  if [ ${COMPMODE} = DBG ]; then
    export FFLAGS="${FFLAGS_DBG}"
    export CFLAGS="${CFLAGS_DBG}"
    export CXXFLAGS="${CXXFLAGS_DBG}"
  fi
fi
# Mac-OSX with gcc3; is not tested
if [ $ARCH = Darwin ]; then
  if [ x$FC = x ]; then
    export FC=g77
  fi
  export FFLAGS="${FFLAGS_OPT}"
  export CFLAGS="${CFLAGS_OPT}"
  export CXXFLAGS="${CXXFLAGS_OPT}"
  export FLIBS="-lfrtbegin -lg2c"
  if [ ${COMPMODE} = OPT ]; then
    export FFLAGS="${FFLAGS_OPT}"
    export CFLAGS="${CFLAGS_OPT}"
    export CXXFLAGS="${CXXFLAGS_OPT}"
  fi
  if [ ${COMPMODE} = DBG ]; then
    export FFLAGS="${FFLAGS_DBG}"
    export CFLAGS="${CFLAGS_DBG}"
    export CXXFLAGS="${CXXFLAGS_DBG}"
  fi
fi

#Platform & opt/dbg - independent flags and variables:


#
# End of the user-changeable part ---------------------------
#
# Checks
#

if [ ! -d ${PYTHIA8LOCATION}/lib ]; then
  echo ERROR: pythia8 libraries not found at ${PYTHIA8LOCATION}/lib
  exit
fi

if [ $?LHAPDFLOCATION ]; then
  if [ x${LHAPDFLOCATION} != x ]; then
    if [ ! -d ${LHAPDFLOCATION} ]; then
      echo WARNING in LHAPDFLOCATION: directory ${LHAPDFLOCATION} does not exist
      echo ...so you cannot run main programs that use LHAPDF 
    fi
    if [ ! -e ${LHAPDFLOCATION}/libLHAPDF.so ] && \
       [ ! -e ${LHAPDFLOCATION}/libLHAPDF.dylib ] && \
       [ ! -e ${LHAPDFLOCATION}/libLHAPDF.a ]; then
      echo WARNING in LHAPDFLOCATION: LHAPDF libraries are not found in ${LHAPDFLOCATION}
      echo "please specify path to the LHAPDF libraries directory (add /lib to the path?)"
      echo ...otherwise you cannot run main programs that use LHAPDF
    fi
    if [ ! -d ${LHAPDFSETSLOCATION} ]; then
      echo WARNING in LHAPDFSETSLOCATION: directory ${LHAPDFSETSLOCATION} does not exist
      echo ...so you cannot run main programs that use LHAPDF 
    fi
  fi
fi

# Fastjet
if [ -x ${FASTJETLOCATION}/bin/fastjet-config ]; then
  FASTJETVERSION1=`${FASTJETLOCATION}/bin/fastjet-config --version`
  echo Found fastjet version ${FASTJETVERSION1} at ${FASTJETLOCATION}
else
  echo WARNING: FastJet not found, the corresponding examples will not work
  echo ...so you cannot run main programs that use FastJet
  export FASTJETLOCATION=
fi

rm -f config.mk

echo SHELL = /bin/sh > config.mk
#echo ARCH = ${ARCH} >> config.mk
#echo MYLCGPLATFORM = ${MYLCGPLATFORM} >> config.mk
#echo FC = ${FC} >> config.mk
#echo CC = ${CC} >> config.mk
#echo FFLAGS = ${FFLAGS} >> config.mk
#echo CFLAGS = ${CFLAGS} >> config.mk
#echo CXXFLAGS = ${CXXFLAGS} >> config.mk
#echo FLIBS = ${FLIBS} >> config.mk
#
echo PYTHIA8LOCATION = ${PYTHIA8LOCATION} >> config.mk
if [ x${LHAPDFVERSION} != x ]; then
  echo LHAPDFVERSION = ${LHAPDFVERSION} >> config.mk
fi
if [ x${LHAPDFLOCATION} != x ]; then
  echo LHAPDFLOCATION = ${LHAPDFLOCATION} >> config.mk
fi
if [ "x${LHAPDFLIBNAME}" != "x" ]; then
  echo "LHAPDFLIBNAME = ${LHAPDFLIBNAME}" >> config.mk
fi

# Fastjet
if [ "x${FASTJETLOCATION}" != "x" ]; then
  echo "FASTJETLOCATION = ${FASTJETLOCATION}" >> config.mk
fi


#
if [ ${PYTHIA8LOCATION} != .. ]; then
  if [ ! -e config.csh ]; then
    echo "#!/bin/csh" > config.csh
    echo "setenv PYTHIA8DATA ${PYTHIA8LOCATION}/xmldoc" >> config.csh
    echo "#!/bin/sh" > config.sh
    echo "export PYTHIA8DATA=${PYTHIA8LOCATION}/xmldoc" >> config.sh
  else
    echo "setenv PYTHIA8DATA ${PYTHIA8LOCATION}/xmldoc" >> config.csh
    echo "export PYTHIA8DATA=${PYTHIA8LOCATION}/xmldoc" >> config.sh
  fi
fi
#
# For the moment we take archive libraries of lhapdf, so actions with
# LD_LIBRARY_PATH are not needed, this is for the future.
# Setting LHAPATH is always needed
# Linux platforms:
if [ $ARCH0 != Darwin ]; then
  if [ x${LHAPDFLOCATION} != x ]; then
    if [ ! -e config.csh ]; then
      echo "#!/bin/csh" > config.csh
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${LHAPDFLOCATION}" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.csh
      echo "endif" >> config.csh
      echo "setenv LHAPATH ${LHAPDFSETSLOCATION}" >> config.csh
      echo "#!/bin/sh" > config.sh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo "export LHAPATH=${LHAPDFSETSLOCATION}" >> config.sh
    else
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${LHAPDFLOCATION}" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.csh
      echo "endif" >> config.csh
      echo "setenv LHAPATH ${LHAPDFSETSLOCATION}" >> config.csh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo "export LHAPATH=${LHAPDFSETSLOCATION}" >> config.sh
    fi
  fi
  if [ x${FASTJETLOCATION} != x ]; then
    if [ ! -e config.csh ]; then
      echo "#!/bin/csh" > config.csh
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${FASTJETLOCATION}/lib" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.csh
      echo "endif" >> config.csh
      echo "#!/bin/sh" > config.sh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
    else
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${FASTJETLOCATION}/lib" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.csh
      echo "endif" >> config.csh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
    fi
  fi
# Mac-OSX platforms:
else
  if [ x${LHAPDFLOCATION} != x ]; then
    if [ ! -e config.csh ]; then
      echo "#!/bin/csh" > config.csh
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${LHAPDFLOCATION}" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.csh
      echo "endif" >> config.csh
      echo "setenv LHAPATH ${LHAPDFSETSLOCATION}" >> config.csh
      echo "#!/bin/sh" > config.sh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo "export LHAPATH=${LHAPDFSETSLOCATION}" >> config.sh
    else
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${LHAPDFLOCATION}" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.csh
      echo "endif" >> config.csh
      echo "setenv LHAPATH ${LHAPDFSETSLOCATION}" >> config.csh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${LHAPDFLOCATION}" >> config.sh
      echo fi >> config.sh
      echo "export LHAPATH=${LHAPDFSETSLOCATION}" >> config.sh
    fi
  fi
  if [ x${FASTJETLOCATION} != x ]; then
    if [ ! -e config.csh ]; then
      echo "#!/bin/csh" > config.csh
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${FASTJETLOCATION}/lib" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.csh
      echo "endif" >> config.csh
      echo "#!/bin/sh" > config.sh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
    else
      echo 'if( ! $?LD_LIBRARY_PATH ) then' >> config.csh
      echo "  setenv LD_LIBRARY_PATH ${FASTJETLOCATION}/lib" >> config.csh
      echo "else" >> config.csh
      echo "  setenv LD_LIBRARY_PATH" '${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.csh
      echo "endif" >> config.csh
      echo 'if [ ! $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH=${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
      echo 'if [ $?LD_LIBRARY_PATH ]; then' >> config.sh
      echo "  export LD_LIBRARY_PATH="'${LD_LIBRARY_PATH}'":${FASTJETLOCATION}/lib" >> config.sh
      echo fi >> config.sh
    fi
  fi
fi