cmake(samples): use LINK_PRIVATE in target_link_libraries

samples/CMakeLists.example.in

@@ -39,4 +39,4 @@ message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")
 add_executable(${EXAMPLE_NAME} "${EXAMPLE_FILE}")
 
 # Link your application with OpenCV libraries
-target_link_libraries(${EXAMPLE_NAME} ${OpenCV_LIBS})
+target_link_libraries(${EXAMPLE_NAME} LINK_PRIVATE ${OpenCV_LIBS})

samples/android/CMakeLists.txt

@@ -20,7 +20,7 @@ add_subdirectory(tutorial-4-opencl)
 if(HAVE_opencv_highgui)
   add_executable(hello-android hello-android/main.cpp)
   ocv_target_include_modules_recurse(hello-android opencv_imgcodecs opencv_videoio opencv_highgui opencv_core opencv_imgproc)
-  ocv_target_link_libraries(hello-android ${OPENCV_LINKER_LIBS} opencv_imgcodecs opencv_videoio opencv_highgui opencv_core opencv_imgproc)
+  ocv_target_link_libraries(hello-android LINK_PRIVATE ${OPENCV_LINKER_LIBS} opencv_imgcodecs opencv_videoio opencv_highgui opencv_core opencv_imgproc)
   set_target_properties(hello-android PROPERTIES OUTPUT_NAME hello-android RUNTIME_OUTPUT_DIRECTORY "${EXECUTABLE_OUTPUT_PATH}")
   add_dependencies(opencv_android_examples hello-android)
 endif()

samples/cpp/CMakeLists.txt

@@ -46,12 +46,12 @@ foreach(sample_filename ${cpp_samples})
     set(package "tutorial")
   endif()
   ocv_define_sample(tgt ${sample_filename} ${package})
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_CPP_SAMPLES_REQUIRED_DEPS})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_CPP_SAMPLES_REQUIRED_DEPS})
   if(sample_filename MATCHES "/gpu/" AND HAVE_opencv_cudaarithm AND HAVE_opencv_cuda_filters)
-    ocv_target_link_libraries(${tgt} opencv_cudaarithm opencv_cudafilters)
+    ocv_target_link_libraries(${tgt} LINK_PRIVATE opencv_cudaarithm opencv_cudafilters)
   endif()
   if(sample_filename MATCHES "/viz/")
-    ocv_target_link_libraries(${tgt} ${VTK_LIBRARIES})
+    ocv_target_link_libraries(${tgt} LINK_PRIVATE ${VTK_LIBRARIES})
     target_compile_definitions(${tgt} PRIVATE -DUSE_VTK)
   endif()
   if(HAVE_OPENGL AND sample_filename MATCHES "detect_mser")

samples/cpp/example_cmake/CMakeLists.txt

@@ -27,4 +27,4 @@ endif()
 add_executable(opencv_example example.cpp)
 
 # Link your application with OpenCV libraries
-target_link_libraries(opencv_example ${OpenCV_LIBS})
+target_link_libraries(opencv_example LINK_PRIVATE ${OpenCV_LIBS})

samples/cpp/tutorial_code/calib3d/real_time_pose_estimation/CMakeLists.txt

@@ -17,5 +17,5 @@ ocv_include_modules_recurse(${OPENCV_CPP_SAMPLES_REQUIRED_DEPS})
 add_executable( ${target}pnp_registration ${sample_dir}main_registration.cpp ${sample_pnplib} )
 add_executable( ${target}pnp_detection ${sample_dir}main_detection.cpp ${sample_pnplib} )
 
-ocv_target_link_libraries( ${target}pnp_registration ${OPENCV_LINKER_LIBS} ${OPENCV_CPP_SAMPLES_REQUIRED_DEPS} )
-ocv_target_link_libraries( ${target}pnp_detection ${OPENCV_LINKER_LIBS} ${OPENCV_CPP_SAMPLES_REQUIRED_DEPS} )
+ocv_target_link_libraries(${target}pnp_registration LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_CPP_SAMPLES_REQUIRED_DEPS})
+ocv_target_link_libraries(${target}pnp_detection LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_CPP_SAMPLES_REQUIRED_DEPS})

samples/directx/CMakeLists.txt

@@ -17,5 +17,5 @@ ocv_include_modules_recurse(${tgt} ${OPENCV_DIRECTX_SAMPLES_REQUIRED_DEPS})
 file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${all_samples})
   ocv_define_sample(tgt ${sample_filename} directx)
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_DIRECTX_SAMPLES_REQUIRED_DEPS})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_DIRECTX_SAMPLES_REQUIRED_DEPS})
 endforeach()

samples/dnn/CMakeLists.txt

@@ -18,5 +18,5 @@ ocv_include_modules_recurse(${OPENCV_DNN_SAMPLES_REQUIRED_DEPS})
 file(GLOB_RECURSE dnn_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${dnn_samples})
   ocv_define_sample(tgt ${sample_filename} dnn)
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_DNN_SAMPLES_REQUIRED_DEPS})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_DNN_SAMPLES_REQUIRED_DEPS})
 endforeach()

samples/gpu/CMakeLists.txt

@@ -51,11 +51,11 @@ endif()
 file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${all_samples})
   ocv_define_sample(tgt ${sample_filename} gpu)
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_CUDA_SAMPLES_REQUIRED_DEPS})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_CUDA_SAMPLES_REQUIRED_DEPS})
   if(HAVE_opencv_xfeatures2d)
-    ocv_target_link_libraries(${tgt} opencv_xfeatures2d)
+    ocv_target_link_libraries(${tgt} LINK_PRIVATE opencv_xfeatures2d)
   endif()
   if(HAVE_opencv_cudacodec)
-    ocv_target_link_libraries(${tgt} opencv_cudacodec)
+    ocv_target_link_libraries(${tgt} LINK_PRIVATE opencv_cudacodec)
   endif()
 endforeach()

samples/opencl/CMakeLists.txt

@@ -31,7 +31,7 @@ ocv_include_directories(${OpenCL_INCLUDE_DIR})
 file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${all_samples})
   ocv_define_sample(tgt ${sample_filename} opencl)
-  ocv_target_link_libraries(${tgt}
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE
     ${OPENCV_LINKER_LIBS}
     ${OPENCV_OPENCL_SAMPLES_REQUIRED_DEPS}
     ${OpenCL_LIBRARY})

samples/opengl/CMakeLists.txt

@@ -23,9 +23,9 @@ if(BUILD_EXAMPLES AND OCV_DEPENDENCIES_FOUND)
   endif()
   foreach(sample_filename ${all_samples})
     ocv_define_sample(tgt ${sample_filename} opengl)
-    ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_OPENGL_SAMPLES_REQUIRED_DEPS})
+    ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_OPENGL_SAMPLES_REQUIRED_DEPS})
     if(sample_filename STREQUAL "opengl_interop.cpp")
-      ocv_target_link_libraries(${tgt} ${X11_LIBRARIES})
+      ocv_target_link_libraries(${tgt} LINK_PRIVATE ${X11_LIBRARIES})
       ocv_target_include_directories(${tgt} ${X11_INCLUDE_DIR})
     endif()
   endforeach()

samples/openvx/CMakeLists.txt

@@ -21,5 +21,5 @@ add_definitions(-DIVX_HIDE_INFO_WARNINGS)
 file(GLOB_RECURSE cpp_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${cpp_samples})
   ocv_define_sample(tgt ${sample_filename} openvx)
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_OPENVX_SAMPLE_REQUIRED_DEPS})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_OPENVX_SAMPLE_REQUIRED_DEPS})
 endforeach()

samples/tapi/CMakeLists.txt

@@ -22,5 +22,5 @@ ocv_include_modules_recurse(${OPENCV_TAPI_SAMPLES_REQUIRED_DEPS})
 file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${all_samples})
   ocv_define_sample(tgt ${sample_filename} tapi)
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_TAPI_SAMPLES_REQUIRED_DEPS})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_TAPI_SAMPLES_REQUIRED_DEPS})
 endforeach()

samples/va_intel/CMakeLists.txt

@@ -17,5 +17,5 @@ ocv_include_modules_recurse(${OPENCV_VA_INTEL_SAMPLES_REQUIRED_DEPS})
 file(GLOB all_samples RELATIVE ${CMAKE_CURRENT_SOURCE_DIR} *.cpp)
 foreach(sample_filename ${all_samples})
   ocv_define_sample(tgt ${sample_filename} va_intel)
-  ocv_target_link_libraries(${tgt} ${OPENCV_LINKER_LIBS} ${OPENCV_VA_INTEL_SAMPLES_REQUIRED_DEPS} ${VA_LIBRARIES} ${VA_INTEL_LIBRARIES})
+  ocv_target_link_libraries(${tgt} LINK_PRIVATE ${OPENCV_LINKER_LIBS} ${OPENCV_VA_INTEL_SAMPLES_REQUIRED_DEPS} ${VA_LIBRARIES} ${VA_INTEL_LIBRARIES})
 endforeach()