chore: import upstream snapshot with attribution

samples/cpp/example_cmake/CMakeLists.txt

@@ -0,0 +1,26 @@
+# cmake needs this line
+cmake_minimum_required(VERSION 3.5)
+
+# Define project name
+project(opencv_example_project)
+
+# Find OpenCV, you may need to set OpenCV_DIR variable
+# to the absolute path to the directory containing OpenCVConfig.cmake file
+# via the command line or GUI
+find_package(OpenCV REQUIRED)
+
+# If the package has been found, several variables will
+# be set, you can find the full list with descriptions
+# in the OpenCVConfig.cmake file.
+# Print some message showing some of them
+message(STATUS "OpenCV library status:")
+message(STATUS "    config: ${OpenCV_DIR}")
+message(STATUS "    version: ${OpenCV_VERSION}")
+message(STATUS "    libraries: ${OpenCV_LIBS}")
+message(STATUS "    include path: ${OpenCV_INCLUDE_DIRS}")
+
+# Declare the executable target built from your sources
+add_executable(opencv_example example.cpp)
+
+# Link your application with OpenCV libraries
+target_link_libraries(opencv_example PRIVATE ${OpenCV_LIBS})