minor improvements in cmake-file for gpu samples

samples/gpu/CMakeLists.txt

 if (BUILD_EXAMPLES)
-    project(gpu_samples)
+    set(project "gpu")
+    string(TOUPPER "${project}" project_upper)
+    
+    project("${project}_samples")
 
     include_directories(
         "${CMAKE_SOURCE_DIR}/modules/core/include"
@@ -14,10 +17,10 @@ if (BUILD_EXAMPLES)
         "${CMAKE_SOURCE_DIR}/modules/legacy/include"
         "${CMAKE_SOURCE_DIR}/modules/contrib/include"
         "${CMAKE_SOURCE_DIR}/modules/gpu/include"
-		"${CMAKE_SOURCE_DIR}/modules/gpu/src/nvidia"
-		"${CMAKE_SOURCE_DIR}/modules/gpu/src/nvidia/core"
-    )   
-    
+        "${CMAKE_SOURCE_DIR}/modules/gpu/src/nvidia"
+        "${CMAKE_SOURCE_DIR}/modules/gpu/src/nvidia/core"
+    )
+
     if(HAVE_CUDA)
         include_directories(${CUDA_INCLUDE_DIRS} ${CMAKE_SOURCE_DIR}/modules/gpu/src/nvidia ${CMAKE_SOURCE_DIR}/modules/gpu/src/nvidia/core)
     endif()
@@ -25,50 +28,50 @@ if (BUILD_EXAMPLES)
     if(CMAKE_COMPILER_IS_GNUCXX)
         set(CMAKE_C_FLAGS "${CMAKE_C_FLAGS} -Wno-unused-function")
     endif()
-    
+
     # ---------------------------------------------
     #      Define executable targets
     # ---------------------------------------------
     MACRO(MY_DEFINE_EXAMPLE name srcs)
-        set(the_target "example_gpu_${name}")
-    	add_executable(${the_target} ${srcs})
-		set_target_properties(${the_target} PROPERTIES
-		    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
-    	    opencv_calib3d opencv_legacy opencv_contrib opencv_gpu)
-    	target_link_libraries(${the_target} ${OPENCV_LINKER_LIBS} opencv_core
-    	    opencv_flann opencv_imgproc opencv_highgui opencv_ml opencv_video opencv_objdetect
-    	    opencv_features2d opencv_calib3d opencv_legacy opencv_contrib opencv_gpu)
-			
-		if(ENABLE_SOLUTION_FOLDERS)
-			set_target_properties(${the_target} PROPERTIES FOLDER "samples//gpu")
-		endif()
+        set(the_target "example_${project}_${name}")
+        add_executable(${the_target} ${srcs})
+        set_target_properties(${the_target} PROPERTIES
+                OUTPUT_NAME "${name}_${project}"                                       
+                PROJECT_LABEL "(EXAMPLE_${project_upper}) ${name}")
+        add_dependencies(${the_target} opencv_core opencv_flann opencv_imgproc opencv_highgui
+            opencv_ml opencv_video opencv_objdetect opencv_features2d
+            opencv_calib3d opencv_legacy opencv_contrib opencv_gpu)
+        target_link_libraries(${the_target} ${OPENCV_LINKER_LIBS} opencv_core
+            opencv_flann opencv_imgproc opencv_highgui opencv_ml opencv_video opencv_objdetect
+            opencv_features2d opencv_calib3d opencv_legacy opencv_contrib opencv_gpu)
+
+        if(ENABLE_SOLUTION_FOLDERS)
+            set_target_properties(${the_target} PROPERTIES FOLDER "samples//${project}")
+        endif()
 
         if(WIN32)
-	    if (MSVC AND NOT BUILD_SHARED_LIBS)
-	        set_target_properties(${the_target} PROPERTIES LINK_FLAGS "/NODEFAULTLIB:atlthunk.lib /NODEFAULTLIB:atlsd.lib /DEBUG")
-	    endif()
-            install(TARGETS ${the_target}
-                RUNTIME DESTINATION "samples/gpu" COMPONENT main)
+            if (MSVC AND NOT BUILD_SHARED_LIBS)
+                set_target_properties(${the_target} PROPERTIES LINK_FLAGS "/NODEFAULTLIB:atlthunk.lib /NODEFAULTLIB:atlsd.lib /DEBUG")
+            endif()
+            install(TARGETS ${the_target} RUNTIME DESTINATION "samples/${project}" COMPONENT main)
         endif()
     ENDMACRO(MY_DEFINE_EXAMPLE)
-    
-    file(GLOB gpu_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
-    
-    foreach(sample_filename ${gpu_samples})
+
+    file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
+
+    foreach(sample_filename ${all_samples})
         get_filename_component(sample ${sample_filename} NAME_WE)
-        MY_DEFINE_EXAMPLE(${sample}  ${sample_filename})
-    endforeach()   
-    
+        file(GLOB sample_srcs RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} ${sample}.*)
+        MY_DEFINE_EXAMPLE(${sample} ${sample_srcs})
+    endforeach()
+
     include("performance/CMakeLists.txt")
 endif(BUILD_EXAMPLES)
 
 if (NOT WIN32)
-    file(GLOB GPU_FILES *.c *.cpp *.jpg *.png *.data makefile.* build_all.sh *.dsp *.cmd )
-    install(FILES ${GPU_FILES}
-            DESTINATION share/opencv/samples/gpu
+    file(GLOB install_list *.c *.cpp *.jpg *.png *.data makefile.* build_all.sh *.dsp *.cmd )
+    install(FILES ${install_list}
+            DESTINATION share/opencv/samples/${project}
             PERMISSIONS OWNER_READ GROUP_READ WORLD_READ)
 endif ()