message: cmake: use CMAKE_BUILD_TYPE=Release by default
diff: @@ -98,6 +98,12 @@ ocv_cmake_hook(CMAKE_INIT)
  # must go before the project()/enable_language() commands
  ocv_update(CMAKE_CONFIGURATION_TYPES "Debug;Release" CACHE STRING "Configs" FORCE)
  +if(NOT DEFINED CMAKE_BUILD_TYPE
  + AND NOT OPENCV_SKIP_DEFAULT_BUILD_TYPE
  +)
  + message(STATUS "'Release' build type is used by default. Use CMAKE_BUILD_TYPE to specify build type (Release or Debug)")
  + set(CMAKE_BUILD_TYPE "Release" CACHE STRING "Choose the type of build")
  +endif()
  if(DEFINED CMAKE_BUILD_TYPE)
  set_property(CACHE CMAKE_BUILD_TYPE PROPERTY STRINGS "${CMAKE_CONFIGURATION_TYPES}")
  endif()
  @@ -599,10 +605,6 @@ endif()
  # ----------------------------------------------------------------------------
  # OpenCV compiler and linker options
  # ----------------------------------------------------------------------------
  -# In case of Makefiles if the user does not setup CMAKE_BUILD_TYPE, assume it's Release:
  -if(CMAKE_GENERATOR MATCHES "Makefiles|Ninja" AND "${CMAKE_BUILD_TYPE}" STREQUAL "")
  - set(CMAKE_BUILD_TYPE Release)
  -endif()
  ocv_cmake_hook(POST_CMAKE_BUILD_OPTIONS)
  