Support for modules in the iOS static library

I have several static iOS libraries (Objective-C) that I would like to add to the module support.

By this I mean using @import statements instead of having to use a bridge header to support swift.

Facebook and Parse recently added this feature to their SDKs, but I can't find any documentation as to how they did it. Keep in mind that these STILL SDKs target iOS 7, so they are not just dynamic frameworks (which will only support iOS8).

Can anyone explain how I can accomplish this?