I have compiled SDL2 (2.0.1 & 2.0.3) for use in Stella 4.0 (which can now use OpenGLES) during configure it does indicate Open GLES and OpenGLES2 are present. However, on running the Test Programs I notice testgles and testgles2 don't run as there is a 'Couldn't create window: GLX is unsupported' error. On compiling Stella and setting graphics to OpenGLES or OpenGLES2 although the GUI works (which makes sense as the Test 'Draw' program works fine), on starting a ROM, again, perhaps a related error? 'No Renderer Available' is present. Does it require 'Linking' of SDL2 to render correctly for OpenGLES/GLES2?