npp version check

modules/gpu/src/precomp.hpp

@@ -67,6 +67,12 @@
     #include "opencv2/gpu/stream_accessor.hpp"
     #include "npp.h"    
 
+#define NPP_MINIMUM_REQUIRED_VERSION 3216
+
+#if (NPP_VERSION_MAJOR*1000+NPP_VERSION_MINOR*100+NPP_VERSION_BUILD < NPP_MINIMUM_REQUIRED_VERSION)
+    #error "Insufficient NPP version, please update it."
+#endif
+
 #else /* defined(HAVE_CUDA) */
 
     static inline void throw_nogpu() { CV_Error(CV_GpuNotSupported, "The library is compilled without GPU support"); }

samples/gpu/CMakeLists.txt

@@ -27,7 +27,7 @@ if (BUILD_EXAMPLES)
         set(the_target "example_gpu_${name}")
     	add_executable(${the_target} ${srcs})
 		set_target_properties(${the_target} PROPERTIES
-		    OUTPUT_NAME "${name}"
+		    OUTPUT_NAME "${name}_gpu"
 		    PROJECT_LABEL "(EXAMPLE_GPU) ${name}")
     	add_dependencies(${the_target} opencv_core opencv_flann opencv_imgproc opencv_highgui
     	    opencv_ml opencv_video opencv_objdetect opencv_features2d