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	( $SERVER, $USERNAME, $PASSWORD ) = ( '', '', '' );	
	print "Server Name [$S]: ";
	chomp($SERVER = $ARSPERLTEST_SERVER || <STDIN>);
	if($SERVER eq "") {
		$SERVER = $S if ($S ne "");
	} 

	print "Admin Username [$U]: ";
	chomp($USERNAME = $ARSPERLTEST_USERNAME || <STDIN>);
	if($USERNAME eq "") {
		$USERNAME = $U if ($U ne "");
	} 

	print "Admin Password [$P]: ";
	chomp($PASSWORD = defined($ARSPERLTEST_PASSWORD) ? $ARSPERLTEST_PASSWORD : <STDIN>);
	if($PASSWORD eq "") {
		$PASSWORD = $P if ($P ne "");
	} 

	print "TCP Port [$T]: ";
	chomp($TCPPORT = defined($ARSPERLTEST_TCPPORT) ? $ARSPERLTEST_TCPPORT : <STDIN>);
	if($TCPPORT eq "") {
		$TCPPORT = $T if ($T ne "");
	} 
	$TCPPORT = 0 if ! $TCPPORT;

	#print "Storing $SERVER / $USERNAME / $PASSWORD ..\n";
	open (FD, "> ./t/config.cache") || die "open failed: $!";
	print FD "package CCACHE;\n";
	print FD "\# enter your server, admin username and password below.\n\n";
	print FD "sub SERVER { \"$SERVER\" ; }\n";
	print FD "sub USERNAME { \"$USERNAME\" ; }\n";
	print FD "sub PASSWORD { \"$PASSWORD\" ; }\n";
	print FD "sub TCPPORT { $TCPPORT ; }\n";
	print FD "1;\n";
	close(FD);

}



#
# given a path to the Api directory, go find ar.h and parse the value
#  of the AR_CURRENT_API_VERSION #define and return it.
# if the path to ar.h is, e.g.,
#  c:\Program Files\ARSystem6.0.1\Arserver\Api\include\ar.h
# then this method wants an appropriately quoted
#  c:\Program Files\ARSystem6.0.1\Arserver\Api
# as its first arg
#
sub findAPIVersion {
  my $path_to_api_dir = shift;

  my $ar_fname = join('/', $path_to_api_dir, 'include', 'ar.h');
  open ($ar_fh, '<'. $ar_fname) or
    die "couldn't open ar.h include file from: \"$ar_fname\": $!\n";

  my $api_version = undef;

  # the line we want to parse looks like:
  #
  ##define AR_CURRENT_API_VERSION       10  /* current api version */
  while (<$ar_fh>) {
    chomp;
    if (m/^\s*#define\s*AR_CURRENT_API_VERSION\s*(\d+)/) {
      $api_version = $1;
      last;
    }
  }

  close $ar_fh;
  return $api_version;
}


#
# given an API version from above, return the minimum server version
#  that supports it.
# That is, if an API version is supported by multiple releases of the
#  AR System Server, we return the chronologically first version
#  since compiling against that version will have been the first
#  time we have arsperl will have to change to support the API change.
#
# this whole strategy of deriving the server version from the api version
#  presumes that we won't have to distinguish between releases of the
#  same api version, which may or may not be correct.
#
# the api version can be the main variable arsperl uses to adjust
#  itself however.
#

sub serverReleaseFromAPIVersion {
  my $api_version = shift;

  # keys are server releases converted to floating point numbers;
  #  values are the api version that release produced.
  # add more values to this table as needed.
  my $rh_api_version_table =
    {
     4.5  => 7,
     4.51 => 7,
     4.52 => 7,
     5.0  => 8,
     5.01 => 8,
     5.1  => 9,
     5.11 => 9,
     5.12 => 9,
     6.0  => 10,
     6.01 => 10,
     6.3  => 11,
    };

  my @api_list = ();
  # make a sorted list from the api version / server release values
  #  that match our api version.
  while (($server_rel, $api) = each %{$rh_api_version_table}) {
    if ($api_version == $api) {
      push @api_list, $server_rel;
    }
  }