Revert "Revert "Merge pull request #836 from jet47:gpu-modules""

samples/gpu/bgfg_segm.cpp

@@ -6,6 +6,12 @@
 #include "opencv2/gpu.hpp"
 #include "opencv2/highgui.hpp"
 
+#include "opencv2/opencv_modules.hpp"
+
+#ifdef HAVE_OPENCV_NONFREE
+#  include "opencv2/nonfree/gpu.hpp"
+#endif
+
 using namespace std;
 using namespace cv;
 using namespace cv::gpu;