#!/bin/sh
# $Id: configure,v 1.29 2002/09/07 05:15:25 carlsonj Exp $

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

case $system in
  Linux)
    makext="linux";
    ksrc="linux";
    state="known";;
  SunOS)
    case $release in
#      [0-3]*)	state="ancient";;
#      4*)	state="known"; ksrc="sunos4"; makext="sunos4";;
      5.[7-9]*|5.[1-9][0-9])	state="known"; ksrc="solaris"; makext="sol2";
              case $arch in
		sun4u)	archvariant='-64';;
		*)	;;
	      esac;;
      5.[1-6]*)	state="known"; ksrc="solaris"; makext="sol2";;
    esac
    if [ -x /opt/SUNWspro/bin/cc ] &&
       /opt/SUNWspro/bin/cc -flags >/dev/null 2>&1; then
      : # use Sun WorkShop compiler
    elif gcc --version >/dev/null 2>&1; then
      archvariant=gcc$archvariant
      compiletype=.gcc
      if [ "$arch" = "sun4u" ]; then
        ( cd /tmp; touch ppp$$.c
	  gcc -c -m64 ppp$$.c >/dev/null 2>&1 || (
	    echo "gcc is unable to make 64 bit modules, and your $arch system needs them."
	    echo "consider upgrading gcc on this machine, or switching to Sun WorkShop."
	    rm -f ppp$$.c
	    exit 1
	  ) || exit 1
	  rm -f ppp$$.c ppp$$.o
        ) || exit 1
      fi
    else
      echo "C compiler not found; hoping for the best."
    fi;;
  NetBSD|FreeBSD|ULTRIX|OSF1|NeXTStep|SINIX-?|UNIX_SV|UNIX_System_V)
    state="notincluded";;
#    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;;
#    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;;
#    FreeBSD)
#      makext="bsd";
#      case $release in
#        1.*)	state="known"; ksrc="freebsd-old";;
#        2.[01]*)	state="known"; ksrc="freebsd-2.0";;
#        2.2.[2-7]*) state="late"; ksrc="freebsd-2.0";;
#        2.2.8*)   state="known"; ksrc="freebsd-2.2.8";;
#        3.[0-1]*)	state="known"; ksrc="freebsd-3.0";;
#      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"
  rm -f Makedefs.com
  ln -s $ksrc/Makedefs$compiletype Makedefs.com
  echo "  $ksrc/Makedefs$compiletype -> Makedefs.com"
  for dir in pppd pppstats chat pppdump pppd/plugins pppd/plugins/rp-pppoe pppd/plugins/radius; do
    rm -f $dir/Makefile
    if [ -f $dir/Makefile.$makext ]; then
      ln -s Makefile.$makext $dir/Makefile
      echo "  $dir/Makefile -> Makefile.$makext"
    fi
  done
  if [ "$archvariant" ]; then
    makext=$makext$archvariant
    rm -f $ksrc/Makefile
    ln -s Makefile.$makext $ksrc/Makefile
    echo "  $ksrc/Makefile -> Makefile.$makext"
  fi
else
  echo "Unable to locate kernel source $ksrc"
  exit 1
fi