#!/bin/sh

# lifted from the configure file for mpich; 00/03/10 jm
#
# Check for perl and perl version
for p in perl5 perl
do
  # Extract the first word of "$p", so it can be a program name with args.
  set dummy $p; ac_word=$2
  if test -z "$ac_echo_n" ; then
    ac_echo_n=yes
    if (echo "testing\c"; echo 1,2,3) | grep c >/dev/null; then
      # Stardent Vistra SVR4 grep lacks -e, says ghazi@caip.rutgers.edu.
      if (echo -n testing; echo 1,2,3) | sed s/-n/xn/ | grep xn >/dev/null; then
    ac_n= ac_c='
' ac_t='        '
      else
        ac_n=-n ac_c= ac_t=
      fi
    else
      ac_n= ac_c='\c' ac_t=
    fi
    ac_echo_test=`echo foo 1>&1`
    if test -z "$ac_echo_test" ; then
       print_error "Your sh shell does not handle the output redirection"
       print_error "1>&1 correctly.  Configure will work around this problem,"
       print_error "but you should report the problem to your vendor."
    fi
  fi
  if test -z "$ac_echo_test" -a 1 = 1 ; then
    echo $ac_n "checking for $ac_word""... $ac_c"
  else
    echo $ac_n "checking for $ac_word""... $ac_c" 1>&1
  fi
  ac_prog_where=""
  if test -n "$PERL"; then
    ac_pg_PERL="$PERL" # Let the user override the test.
  else
    ac_first_char=`expr "$p" : "\(.\)"`
    if test "$ac_first_char" = "/" -a -x "$p" ; then
         ac_pg_PERL="$p"
         ac_prog_where=$p
    else
        IFS="${IFS=     }"; ac_save_ifs="$IFS"; IFS="${IFS}:"
        for ac_dir in $PATH; do
          test -z "$ac_dir" && ac_dir=.
          if test -f $ac_dir/$ac_word; then
            ac_pg_PERL="$p"
            ac_prog_where=$ac_dir/$ac_word
            break
          fi
        done
        IFS="$ac_save_ifs"
    fi
  fi;PERL="$ac_pg_PERL"
  if test -n "$ac_prog_where" ; then
    if test -z "$ac_echo_test" -a 1 = 1 ; then
      echo "$ac_t""found $ac_prog_where ($PERL)"
    else
      echo "$ac_t""found $ac_prog_where ($PERL)" 1>&1
    fi
    PERLFULLPATH=$ac_prog_where  
  else
    if test -z "$ac_echo_test" -a 1 = 1 ; then
      echo "$ac_t""no"
    else
      echo "$ac_t""no" 1>&1
    fi
  fi
  test -n "$PERL" && break
done

if test -z "$PERL" ; then
    # We have to set this outside of the loop lest the first failure in 
    # PROGRAM_CHECK set the value (which then terminates the effect of the
    # loop, since autoconf macros only set values that are null, they 
    # don't override them
    PERL=""
fi

if test -n "$PERL" ; then
    PERL="$PERL"
    
    perlversion=`$PERL -v | grep 'This is perl' | \
       sed -e 's/^.*v[a-z ]*\([0-9]\).*$/\1/'`

    # Should do a test first for ch_p4 etc.
    if test "$perlversion" -lt 5 ; then
        echo "WRF build requires perl version 5, which configure did not find."
        echo "You can set the environment variable PERL to contain the "
        echo "location of perl version 5."
        echo "Configure believes that $PERL is version $perlversion ."
        PERL=""
    fi
    
fi

# Look for netcdf
if test -z "$NETCDF" ; then
  for p in /usr/local/netcdf
  do
    if test -d $p ; then
      NETCDF=$p
      break
    fi
  done
fi
if ( test -z "$NETCDF" ) ; then
 
  if [ `hostname | cut -c 1-2` = "bb" -o `hostname | cut -c 1-2` = "bf" -o `hostname | cut -c 1-2` = "bs" -o \
       `hostname` = "dataproc" -o `hostname` = "ute" ] ; then
    echo 'Compiling on an NCAR system with weird paths to NetCDF'
    echo 'Setting up a local NetCDF directory with symlinks'
    if ( test -d ./netcdf_links ) ; then
      echo 'A directory ./netcdf_links already exists. Continuing.'
    else
      mkdir ./netcdf_links
      if [ `hostname | cut -c 1-2` = "bb" -o `hostname | cut -c 1-2` = "bf" -o `hostname | cut -c 1-2` = "bs" ] ; then
        ( cd ./netcdf_links ; ln -s /usr/local/lib32/r4i4 ./lib ; \
                              ln -s /usr/local/include ./include )
      else
        ( cd ./netcdf_links ; ln -s /usr/local/lib64/r4i4 ./lib ; \
                              ln -s /usr/local/include ./include )
      fi
    fi
    NETCDF=`pwd`/netcdf_links
    export NETCDF
  else
    bedone=""
    if [ -d ./netcdf_links ] ; then
      echo '** There is an existing ./netcdf_links file. Should I use? [y]'
      read resp
      if [ "$resp" = "y" ] ; then
        NETCDF=`pwd`/netcdf_links
        bedone="yes"
      else
        echo 'Removing existing ./netcdf_links directory'
        /bin/rm -fr ./netcdf_links
      fi
    else
      echo '** WARNING: No path to NETCDF and environment variable NETCDF not set.'
      echo '** would you like me to try to fix? [y]'
    fi
    netcdfipath=""
    netcdflpath=""
    while [ -z "$bedone" ] ; do 
      read resp
      if [ "$resp" = "y" ]  ; then
        if [ -d ./netcdf_links ] ; then
          echo 'There is already a ./netcdf_links directory. Okay to use links'
          echo 'in this directory for NetCDF include and lib dirs? [y]'
          read resp
          if [ "$resp" = "y" ] ; then
            NETCDF=`pwd`/netcdf_links
            export NETCDF
            bedone="yes"
            continue
          fi
        fi
        if [ -z "$netcdfipath" ] ; then
          echo 'Enter full path to NetCDF include directory on your system'
          read resp
          if [ ! -d "$resp" ] ; then
            echo "invalid path: $resp. Try again? [y]" ; continue
          fi
          netcdfipath=$resp
        fi
        if  [ -z "$netcdflpath" ] ; then
          echo 'Enter full path to NetCDF library directory on your system'
          read resp
          if [ ! -d "$resp" ] ; then
            echo "invalid path: $resp. Try again? [y]" ; continue
          fi
          netcdflpath=$resp
        fi

        if [ -n "$netcdflpath" -a -n "$netcdfipath" ] ; then
          if [ -d ./netcdf_links ] ; then
            echo 'Existing ./netcdf_links directory. Okay to remove. [y]'
            read resp
            if [ "$resp" = "y" ]  ; then
              /bin/rm -fr ./netcdf_links
            fi
          fi
          mkdir ./netcdf_links
          cd ./netcdf_links 
            ln -s "$netcdfipath" include
            ln -s "$netcdflpath" lib
          cd ..
          echo created new ./netcdf_links directory
          /bin/ls -lF ./netcdf_links
          NETCDF=`pwd`/netcdf_links
          export NETCDF
          bedone="yes"
        fi
      else
        bedone="yes"
      fi
    done
  fi
fi

if [ -n "$NETCDF" ] ; then
  echo "Will use NETCDF in dir: $NETCDF"
else
  echo "Will configure for use without NetCDF"
fi

if [ -n "$HDF5" ] ; then
  echo "Will use HDF5 in dir: $HDF5"
else
  echo "Will configure for use without HDF5"
fi

if [ -n "$PHDF5" ] ; then
  echo "Will use PHDF5 in dir: $PHDF5"
else
  echo "Will configure for use without PHDF5"
fi

# if the uname command exists, give it a shot and see if
# we can narrow the choices; otherwise, spam 'em
os="ARCH"
mach="ARCH"
type uname > /dev/null
if [ $? -eq 0 ] ; then
  os=`uname`
  if [ "$os" = "AIX" -o "$os" = "IRIX" -o "$os" = "IRIX64" -o "$os" = "SunOS" ] ; then
    mach="ARCH"
  else
  if [ "$os" = "OSF1" -o "$os" = "Linux" -o "UNIX_System_V" ] ; then
    mach=`uname -m`
  else
    os="ARCH"
    mach="ARCH"
  fi
  fi
fi

# Found perl, so proceed with configuration
if test -n "$PERL" ; then
  $PERL arch/Config.pl -perl=$PERL -netcdf=$NETCDF -hdf5=$HDF5 -phdf5=$PHDF5 -os=$os -mach=$mach
fi