> MUGEN is being developed in C with DJGPP and Allegro. It is being
> compiled with gcc 2.95.2 and linked with Allegro 3.9.34 WIP.

"M.U.G.E.N was originally developed for DOS in C using DJGPP and Allegro [...]. Today, M.U.G.E.N is built for Microsoft Windows using Visual Studio Express and SDL."
http://www.elecbyte.com/mugendocs/readme.txt

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Version 1.0 RC1
22 Sep 2009
[...]
Misc
* Base engine ported from Allegro to use SDL.
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http://www.elecbyte.com/mugendocs/history.html