#!/bin/sh
#
# $Id: autogen.sh,v 1.3 2004/01/21 22:51:49 jcdutton Exp $
#
# This file is shamelessly copied from xine-lib.
# With regards to Stephen Torri <storri@users.sourceforge.net> who
# originally wrote this script.
#
# run this to generate all the initial makefiles, etc.

PROG=libdvdnav

# Minimum value required to build
WANT_AUTOMAKE_1_6=1 export WANT_AUTOMAKE_1_6
AUTOMAKE_MIN=1.6.0
AUTOCONF_MIN=2.53
LIBTOOL_MIN=1.4.0

# Check how echo works in this /bin/sh
case `echo -n` in
-n)     _echo_n=   _echo_c='\c';;
*)      _echo_n=-n _echo_c=;;
esac

detect_configure_ac() {

  srcdir=`dirname $0`
  test -z "$srcdir" && srcdir=.

  (test -f $srcdir/configure.ac) || {
    echo $_echo_n "*** Error ***: Directory "\`$srcdir\`" does not look like the"
    echo " top-level directory"
    exit 1
  }
}


#--------------------
# AUTOCONF
#-------------------
detect_autoconf() {
  set -- `type autoconf 2>/dev/null`
  RETVAL=$?
  NUM_RESULT=$#
  RESULT_FILE=$3
  if [ $RETVAL -eq 0 -a $NUM_RESULT -eq 3 -a -f "$RESULT_FILE" ]; then
    AC="`autoconf --version | sed -n 1p | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    AUTOCONF_MIN="`echo $AUTOCONF_MIN | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    if test $AC -lt 100 ; then
      AC=`expr $AC \* 10`
    fi
    if [ `expr $AC` -ge $AUTOCONF_MIN ]; then
      autoconf_ok=yes
    fi
  else
    echo
    echo "**Error**: You must have \`autoconf' >= $AUTOCONF_MIN installed to" 
    echo "           compile $PROG. Download the appropriate package"
    echo "           for your distribution or source from ftp.gnu.org."
    exit 1
  fi
}

run_autoheader () {
  if test x"$autoconf_ok" != x"yes"; then
    echo
    echo "**Warning**: Version of autoconf is less than $AUTOCONF_MIN."
    echo "             Some warning message might occur from autoconf"
    echo
  fi

  echo $_echo_n " + Running autoheader: $_echo_c";
    autoheader;
  echo "done."
}

run_autoconf () {
  if test x"$autoconf_ok" != x"yes"; then
    echo
    echo "**Warning**: Version of autoconf is less than $AUTOCONF_MIN."
    echo "             Some warning message might occur from autoconf"
    echo
  fi

  echo $_echo_n " + Running autoconf: $_echo_c";
    autoconf;
  echo "done."
}

#--------------------
# LIBTOOL
#-------------------
detect_libtool() {
  set -- `type libtool 2>/dev/null`
  RETVAL=$?
  NUM_RESULT=$#
  RESULT_FILE=$3
  if [ $RETVAL -eq 0 -a $NUM_RESULT -eq 3 -a -f "$RESULT_FILE" ]; then
    LT="`libtool --version | awk '{ print $4 }' | sed -e 's/[a-zA-Z\ \.\(\)\-\;]//g'`"
    LIBTOOL_MIN="`echo $LIBTOOL_MIN | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    if test $LT -lt 100 ; then
      LT=`expr $LT \* 10`
    fi
    if [ `expr $LT` -ge $LIBTOOL_MIN ]; then
      libtool_ok=yes
    fi
  else
    echo
    echo "**Error**: You must have \`libtool' >= $LIBTOOL_MIN installed to" 
    echo "           compile $PROG. Download the appropriate package"
    echo "           for your distribution or source from ftp.gnu.org."
    exit 1
  fi
}

run_libtoolize() {
  if test x"$libtool_ok" != x"yes"; then
    echo
    echo "**Warning**: Version of libtool is less than $LIBTOOL_MIN."
    echo "             Some warning message might occur from libtool"
    echo
  fi

  echo $_echo_n " + Running libtoolize: $_echo_c";
    libtoolize --force --copy >/dev/null 2>&1;
  echo "done."
}

#--------------------
# AUTOMAKE
#--------------------
detect_automake() {
  #
  # expected output from 'type' is
  #   automake is /usr/local/bin/automake
  #
  set -- `type automake 2>/dev/null`
  RETVAL=$?
  NUM_RESULT=$#
  RESULT_FILE=$3
  if [ $RETVAL -eq 0 -a $NUM_RESULT -eq 3 -a -f "$RESULT_FILE" ]; then
    AM="`automake --version | sed -n 1p | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    AUTOMAKE_MIN="`echo $AUTOMAKE_MIN | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    if test $AM -lt 100 ; then
      AM=`expr $AM \* 10`
    fi
    if [ `expr $AM` -ge $AUTOMAKE_MIN ]; then
      automake_ok=yes
    fi
  else
    echo
    echo "**Error**: You must have \`automake' >= $AUTOMAKE_MIN installed to" 
    echo "           compile $PROG. Download the appropriate package"
    echo "           for your distribution or source from ftp.gnu.org."
    exit 1
  fi
}

run_automake () {
  if test x"$automake_ok" != x"yes"; then
    echo
    echo "**Warning**: Version of automake is less than $AUTOMAKE_MIN."
    echo "             Some warning message might occur from automake"
    echo
  fi

  echo $_echo_n " + Running automake: $_echo_c";

  automake --gnu --add-missing --copy;
  echo "done."
}

#--------------------
# ACLOCAL
#-------------------
detect_aclocal() {

  # if no automake, don't bother testing for aclocal
  set -- `type aclocal 2>/dev/null`
  RETVAL=$?
  NUM_RESULT=$#
  RESULT_FILE=$3
  if [ $RETVAL -eq 0 -a $NUM_RESULT -eq 3 -a -f "$RESULT_FILE" ]; then
    AC="`aclocal --version | sed -n 1p | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    ACLOCAL_MIN="`echo $AUTOMAKE_MIN | sed -e 's/[a-zA-Z\ \.\(\)\-]//g'`"
    if test $AC -lt 100 ; then
      AC=`expr $AC \* 10`
    fi
    if [ `expr $AC` -ge $ACLOCAL_MIN ]; then
      aclocal_ok=yes
    fi
  else
    echo
    echo "**Error**: You must have \`automake' >= $AUTOMAKE_MIN installed to" 
    echo "           compile $PROG. Download the appropriate package"
    echo "           for your distribution or source from ftp.gnu.org."
    exit 1
  fi
}

run_aclocal () {

  if test x"$aclocal_ok" != x"yes"; then
    echo
    echo "**Warning**: Version of aclocal is less than $AUTOMAKE_MIN."
    echo "             Some warning message might occur from aclocal"
    echo
  fi
  
  echo $_echo_n " + Running aclocal: $_echo_c"

  aclocal -I m4
  echo "done." 
}

#--------------------
# CONFIGURE
#-------------------
run_configure () {
  rm -f config.cache
  echo " + Running 'configure $@':"
  if [ -z "$*" ]; then
    echo "   ** If you wish to pass arguments to ./configure, please"
    echo "   ** specify them on the command line."
  fi
  ./configure "$@" 
}


#---------------
# MAIN
#---------------
detect_configure_ac
detect_autoconf
detect_libtool
detect_automake
detect_aclocal


#   help: print out usage message
#   *) run aclocal, autoheader, automake, autoconf, configure
case "$1" in
  aclocal)
    run_aclocal
    ;;
  autoheader)
    run_autoheader
    ;;
  automake)
    run_aclocal
    run_automake
    ;;
  autoconf)
    run_aclocal
    run_autoconf
    ;;
  libtoolize)
    run_libtoolize
    ;;
  noconfig)
    run_aclocal
    run_libtoolize
    run_autoheader
    run_automake
    run_autoconf
    ;;
  *)
    run_aclocal
    run_libtoolize
    run_autoheader
    run_automake
    run_autoconf
    run_configure $@
    ;;
esac