trying to build the example found on http://docs.opencv.org/3.1.0/db/d28/tutorial_cascade_classifier.html#gsc.tab=0
on my Mac OSX opencv 3.1
application hangs when I try to run it using
String eyes_cascade_name = "haarcascade_eye_tree_eyeglasses.xml";
if I change the line for the one below it works.
String eyes_cascade_name = "haarcascade_eye.xml";