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#!/bin/sh

die(){
	echo "$@"
	exit
}

#--------------------------------------------------------------------------
# autoconf 2.50 or newer
#
ac_version=`${AUTOCONF:-autoconf} --version 2>/dev/null|head -1| sed -e 's/^[^0-9]*//' -e 's/[a-z]* *$//'`
if test -z "$ac_version"; then
  echo "buildconf: autoconf not found."
  echo "            You need autoconf version 2.50 or newer installed."
  exit 1
fi
IFS=.; set $ac_version; IFS=' '
if test "$1" = "2" -a "$2" -lt "50" || test "$1" -lt "2"; then
  echo "buildconf: autoconf version $ac_version found."
  echo "            You need autoconf version 2.50 or newer installed."
  echo "            If you have a sufficient autoconf installed, but it"
  echo "            is not named 'autoconf', then try setting the"
  echo "            AUTOCONF environment variable."
  exit 1
fi

echo "buildconf: autoconf version $ac_version (ok)"

#--------------------------------------------------------------------------
# autoheader 2.50 or newer
#
ah_version=`${AUTOHEADER:-autoheader} --version 2>/dev/null|head -1| sed -e 's/^[^0-9]*//' -e 's/[a-z]* *$//'`
if test -z "$ah_version"; then
  echo "buildconf: autoheader not found."
  echo "            You need autoheader version 2.50 or newer installed."
  exit 1
fi
IFS=.; set $ah_version; IFS=' '
if test "$1" = "2" -a "$2" -lt "50" || test "$1" -lt "2"; then
  echo "buildconf: autoheader version $ah_version found."
  echo "            You need autoheader version 2.50 or newer installed."
  echo "            If you have a sufficient autoheader installed, but it"
  echo "            is not named 'autoheader', then try setting the"
  echo "            AUTOHEADER environment variable."
  exit 1
fi

echo "buildconf: autoheader version $ah_version (ok)"

#--------------------------------------------------------------------------
# automake 1.5 or newer
#
am_version=`${AUTOMAKE:-automake} --version 2>/dev/null|head -1| sed -e 's/^.* \([0-9]\)/\1/' -e 's/[a-z]* *$//'`
if test -z "$am_version"; then
  echo "buildconf: automake not found."
  echo "            You need automake version 1.5 or newer installed."
  exit 1
fi
IFS=.; set $am_version; IFS=' '
if test "$1" = "1" -a "$2" -lt "5" || test "$1" -lt "1"; then
  echo "buildconf: automake version $am_version found."
  echo "            You need automake version 1.5 or newer installed."
  echo "            If you have a sufficient automake installed, but it"
  echo "            is not named 'autommake', then try setting the"
  echo "            AUTOMAKE environment variable."
  exit 1
fi

echo "buildconf: automake version $am_version (ok)"

echo "buildconf: running aclocal"
${ACLOCAL:-aclocal}       || die "The command '${AUTOHEADER:-aclocal}' failed"
echo "buildconf: running autoheader"
${AUTOHEADER:-autoheader} || die "The command '${AUTOHEADER:-autoheader}' failed"
echo "buildconf: running autoconf"
${AUTOCONF:-autoconf}     || die "The command '${AUTOCONF:-autoconf}' failed"
echo "buildconf: running automake"
${AUTOMAKE:-automake} -a  || die "The command '${AUTOMAKE:-automake} -a' failed"

exit 0