message: Set default CMAKE_BUILD_TYPE
diff: cmake_minimum_required(VERSION 2.8)
  project(OpenImageDenoise)
  +set(CONFIGURATION_TYPES "Debug;Release;RelWithDebInfo")
  +if (win32)
  + if (NOT OIDN_DEFAULT_CMAKE_CONFIGURATION_TYPES_SET)
  + set(CMAKE_CONFIGURATION_TYPES "${CONFIGURATION_TYPES}"
  + CACHE STRING "List of generated configurations." FORCE)
  + set(OOIDN_DEFAULT_CMAKE_CONFIGURATION_TYPES_SET ON
  + CACHE INTERNAL "Default CMake configuration types set.")
  + endif()
  +else()
  + if(NOT CMAKE_BUILD_TYPE)
  + set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the build type." FORCE)
  + endif()
  + set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS ${CONFIGURATION_TYPES})
  +endif()
  +
  # Modified version of MKL-DNN
  add_subdirectory(mkl-dnn)
  