[phpCallGraph-general] phpcallgraph error on os x

I am running this on OS X (Yosemite) and get the following errors:

% bin/phpcallgraph -n -f png -o PHPCallGraph.png src/PHPCallGraph.php

Deprecated: Assigning the return value of new by reference is deprecated in /Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib/pear/PEAR.php on line 569

Deprecated: Assigning the return value of new by reference is deprecated in /Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib/pear/PEAR.php on line 572

Warning: require_once(Console/Getopt.php): failed to open stream: No such file or directory in /Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib/pear/System.php on line 27

Fatal error: require_once(): Failed opening required 'Console/Getopt.php' (include_path='/Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/src:/Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib/ezcomponents:/Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib:.::/Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib/pear') in /Users/Vijay/phpcallgraph/phpcallgraph-0.8.0/lib/pear/System.php on line 27