#!/bin/sh

#
# PMEMD Configuration utility.
# Author: Bob Duke
# 

#------------------------------------------------------------------------------
#  set up usage statement:
#------------------------------------------------------------------------------
usage(){
cat << EOD

Usage: ./configure <architecture option> <compiler option> [parallel option]

    where <architecture option> is one of

    aix_spx             (IBM AIX, IBM SPx processors)
    aix_sp4_massvp4     (IBM AIX, IBM SP4 processors, massvp4 library available)
    cray_t3e            (UNICOS/mk UNIX, Cray T3E processors)
    linux_athlon        (Athlon or later AMD processors)
    linux_opteron       (Opteron or later AMD processors)
    linux_p3            (Pentium III or later Intel processors)
    linux_p4            (Pentium IV or later Intel processors)
    osf_alpha           (OSF1 Tru64 UNIX, HP or Compaq AlphaServer processors)
    sgi altix           (SGI Linux, Intel Itanium 2 processors)
    sgi_mips            (SGI IRIX UNIX, MIPS R8k,10k,12k,14k or 16k processors)

    where <compiler option> is one of

    compaqf90           (Compaq Fortran 90, osf1_alpha only)
    f90                 (Native Fortran 90, sgi_mips, cray_t3e only)
    ifc7                (Intel Fortran Compiler, v7, linux_*, sgi_altix)
    ifort               (Intel Fortran Compiler, v8, linux_*, sgi_altix)
                        (WARNING - IA32 compiler broken at time of release;
                         Look on amber.scripps.edu website for updates)
    lahey_f95           (Lahey Fortran 95, linux_p3, linux_athlon only)
    xlf90               (IBM XLF90, aix_spx only)
    pgf90               (Portland Group Fortran Compiler)

    where [parallel option] is one of

    nopar               (uniprocessor, no mpi, all platforms except cray_t3e)
    mpi                 (native mpi, aix_spx, osf_alpha, sgi_altix, sgi_mips,
                         cray_t3e only)
    mpich               (MPICH mpi, linux_*, ifc7 only)
    lam                 (LAM mpi, linux_*, ifc7 only)
    mpich_gm            (Myrinet MPICH GM mpi, linux_*, ifc7 only)
    quadrics            (Quadrics mpi, osf1_alpha only)

    The architecture and compiler MUST be specified.  If a parallel option
    is not specified, the default is nopar.

    PMEMD 8 ships with support for the above options.
    Users may define other architecture/compiler/parallel options by creating
    a file config_data/<architecture option>.<compiler option>.<parallel option>

===========================================================
EOD
exit 1
}

#set -x

umask 022

command="$0 $*"

basedir=`basename $PWD`

if [ $# -eq 1 ]; then

  if [ $1 = -help -o $1 = -HELP ]; then
    usage
  fi

  if [ $1 = -h -o $1 = -H ]; then
    usage
  fi

fi

if [ $basedir != pmemd ]; then
  echo
  echo The PMEMD configuration script must be executed from within
  echo the pmemd directory!
  echo PMEMD Configuration Failed!
  exit 1
fi

if [ ! -d config_data ]; then
  echo
  echo The PMEMD configuration script requires data in the config_data
  echo directory, which does not exist!
  echo PMEMD Configuration Failed!
  exit 1
fi

if [ $# -ne 2 -a $# -ne 3 ]; then
  echo
  echo The command \"$command\"
  echo has an incorrect number of parameters!
  echo PMEMD Configuration Failed!
  usage
fi

arch=$1
compiler=$2

if [ $# -eq 3 ]; then
  parallel=$3
else
  parallel=nopar
fi

if [ ! -f config_data/$arch.$compiler.$parallel ]; then
  echo
  echo No configuration information found for the combination:
  echo Architecture Option = $arch
  echo Compiler Option     = $compiler
  echo Parallel Option     = $parallel
  echo If you need this combination, you must create an appropriate file
  echo \"$arch.$compiler.$parallel\" in the config_data directory.
  echo PMEMD Configuration Failed!
  usage
fi

rm -f config.h

if [ -f config.h ]; then
  echo Error deleting old config.h file!
  echo PMEMD Configuration Failed!
  exit 1
fi

cat << EOD > config.h
#!/bin/csh -f
EOD

if [ $parallel = mpich ]; then

  if [ -z $MPICH_HOME ]; then
    echo Please enter name of directory where MPICH files are installed:
    read MPICH_HOME
  else
    echo PMEMD is assuming MPICH files are installed in $MPICH_HOME.
  fi
  cat << EOD >> config.h
setenv MPICH_HOME $MPICH_HOME
EOD

elif [ $parallel = lam ]; then

  if [ -z $LAM_HOME ]; then
    echo Please enter name of directory where LAM files are installed:
    read LAM_HOME
  else
    echo PMEMD is assuming LAM files are installed in $LAM_HOME.
  fi
  cat << EOD >> config.h
setenv LAM_HOME $LAM_HOME
EOD

elif [ $parallel = mpich_gm ]; then

  if [ -z $MPICH_HOME ]; then
    echo Please enter name of directory where Myrinet MPICH files are installed:
    read MPICH_HOME
  else
    echo PMEMD is assuming Myrinet MPICH files are installed in $MPICH_HOME.
  fi

  if [ -z $MPICH_LIBDIR2 ]; then
    echo Please enter name of directory where Myrinet libgm.a is installed:
    read MPICH_LIBDIR2
  else
    echo PMEMD is assuming Myrinet libgm.a file is installed in $MPICH_LIBDIR2.
  fi
  cat << EOD >> config.h
setenv MPICH_HOME $MPICH_HOME
setenv MPICH_LIBDIR2 $MPICH_LIBDIR2
EOD

else
  :
fi

if [  ! -f config.h ]; then
  echo Error creating config.h file!
  echo PMEMD Configuration Failed!
  exit 1
fi

echo PMEMD Configurate successfully completed.

cat config_data/$arch.$compiler.$parallel >> config.h