How do you rebuild a Xcode framework from source?

I am trying to alter the AWSIOSSDK framework so that it works for developing OSX apps, and I need to rebuild the binaries after I edit the files. But I don't know how to do this.

I have access to a src/ dire开发者_如何转开发ctory, which then has further directories of libraries, but there aren't any Makefiles or configure scripts anywhere in the folders.