In the page
OpenCV 2.4.4.0 documentation »
OpenCV Tutorials »
feature2d module. 2D Features framework »

the example still uses the deprecated API.
Should change (at least)

BruteForceMatcher< L2<float> > matcher;

(possibly) to

cv::BFMatcher matcher(cv::NORM_L2);

See:
http://docs.opencv.org/doc/tutorials/features2d/feature_description/feature_description.html