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#!/bin/sh
# $Id: configure,v 1.16 1999/04/27 22:18:39 varadhan Exp $

if [ -d /NextApps ]; then
  system="NeXTStep"
else
  system=`uname -s`
  release=`uname -r`
fi
state="unknown"

case $system in
  NetBSD)
    makext="bsd";
    case $release in
      0.*)	state="ancient";;
      1.0*)	state="ancient";;
      1.1*)	state="known"; ksrc="netbsd-1.1";;
      1.2*)	state="known"; ksrc="netbsd-1.2"; makext="netbsd-1.2";;
      1.[3-9]*|[2-9]*)
		state="late"; ksrc="netbsd-1.2";;
    esac;;
  SunOS)
    case $release in
      [0-3]*)	state="ancient";;
      4*)	state="known"; ksrc="sunos4"; makext="sunos4";;
      5*)	state="known"; ksrc="svr4"; makext="sol2";;
    esac;;
  ULTRIX)
    makext="ultrix";
    case $release in
      [0-3]*)	state="ancient";;
      4.[01]*)	state="early"; ksrc="ultrix";;
      4.[234])	state="known"; ksrc="ultrix";;
    esac;;
  OSF1)
    makext="osf";
    case $release in
      V1.*)   state="neolithic"; ksrc="osf1";;
      V[23].*)	state="neolithic"; ksrc="osf1";;
      V4.*)	state="known"; ksrc="osf1";;
      V[5-9]*) state="late"; ksrc="osf1";;
    esac;;
  Linux)
    makext="linux";
    ksrc="linux";
    state="known";;
  FreeBSD)
    makext="bsd";
    case $release in
      1.*)	state="known"; ksrc="freebsd-old";;
      2.[01]*)	state="known"; ksrc="freebsd-2.0";;
      2.[2-9]*)	state="late"; ksrc="freebsd-2.0";;
    esac;;
  NeXTStep)
    makext="NeXT";
    ksrc="NeXT";
    state="known";;
  SINIX-?)
    case $release in
      5.4[01]) state=known; ksrc=svr4; makext=svr4;;
      5.4[2-9]) state=late; ksrc=svr4; makext=svr4;;
    esac;;
  # Intel SVR4 systems come with a bug in the uname program.  Unless
  # your provider fixed the bug, or you get a fix for it, uname -S will
  # overwrite the system name with the node name!
  UNIX_SV|UNIX_System_V|`uname -n`)
    case $release in
      4.0) state=known; ksrc=svr4; makext=svr4;;
      4.2) state=late; ksrc=svr4; makext=svr4;;
    esac;;
esac

if [ -d "$ksrc" ]; then :; else
  state="notincluded"
  unset ksrc
fi

case $state in
  neolithic) 
    echo "This is a newer release on an outdated OS ($system)."
    echo " This software may  or may not work on this OS."
    echo " You may want to download an older version of PPP for this OS.";;
  ancient)
    echo "This is an old release of a supported OS ($system)."
    echo "This software cannot be used as-is on this system,"
    echo "but you may be able to port it.  Good luck!"
    exit;;
  early)
    echo "This is an old release of a supported OS ($system)."
    echo "This software should install and run on this system,"
    echo "but it hasn't been tested.";;
  late)
    echo "This is a newer release of $system than is supported by"
    echo "this software.  It may or may not work.";;
  unknown)
    echo "This software has not been ported to this system.  Sorry.";;
  notincluded)
    echo "Support for this system has not been included"
    echo "in this distribution.  Sorry.";;
esac

if [ -d "$ksrc" ]; then
  echo "Creating links to Makefiles."
  rm -f Makefile
  ln -s $ksrc/Makefile.top Makefile
  echo "  Makefile -> $ksrc/Makefile.top"
  if [ $ksrc = svr4 ]; then
    rm -f $ksrc/Makefile
    ln -s Makefile.$makext $ksrc/Makefile
    echo "  $ksrc/Makefile -> Makefile.$makext"
  fi
  for dir in pppd pppstats chat pppdump; do
    rm -f $dir/Makefile
    if [ -f $dir/Makefile.$makext ]; then
      ln -s Makefile.$makext $dir/Makefile
      echo "  $dir/Makefile -> Makefile.$makext"
    fi
  done
fi