When compiling master & RB-2.4 with Visual Studio 17, there are lot of warnings. Most of them only require a small change in the source code. But one require several iterations to be correctly fixed in OCIO.

F:\OpenSource\openexr\IlmBase\Iex\IexBaseExc.cpp(393): warning C4996: 'getenv': This function or variable may be unsafe. Consider using _dupenv_s instead. To disable deprecation,

Introduce a decode flag that produces a vertically flipped image, this would only be valid in non-progressive mode.