http://weblogs.macromedia.com/labs/arch ... lease.html
A research project, codenamed Alchemy, that allows users to compile C and C++ code into ActionScript libraries (AVM2) is now available on Adobe Labs. With Alchemy, Web application developers can now reuse hundreds of millions of lines of existing open source C and C++ client or server-side code on the Flash Platform. Alchemy brings the power of high performance C and C++ libraries to Web applications with minimal degradation on AVM2. The C/C++ code is compiled to ActionScript 3.0 as a SWF or SWC that runs on Adobe Flash Player 10 or Adobe AIR 1.5.
Cheers, Roman