All extensions should be able to compile with the latest versions of their respective SDKs and libraries. They must compile in all of VC++2008, VC++2010, VC++2012, and clang, or all but VC++2008 and VC++2010 if they user C++11 features. C++11 compilation under VC++2010 is recommended, but optional.

This will involve forking those extensions, updating them, and subitting pull requests. Submodules should point to the original, but the README in the Extensions directory should indicate which extensions are out of date and where to find the updated fork.