cocos2d-x-3.0alpha1 Emscripten

Hello!
I’m trying to follow this tutorial: http://www.cocos2d-x.org/wiki/Emscripten_usage
But I can’t find “Makefile.emscripten” file in cocos directory.

It seems that this tutorial works only for cocos2d-x 2.2.1.
Is it possible to use Emscripten with cocos2d-x-3.0alpha1? How can I do that?
Please, help.

i was wondering the same thing… * bump *