For everyone here who mentioned building wrappers around llvm-c or llvm c++ api: there is a nice tool for automating this job (and many other similar things), it's called "Clang". Or, more specifically, cindex. It's easy to use Python + cindex to parse LLVM headers and spit out nice wrapper library for your language of choice.

And example of this approach: https://github.com/combinatorylogic/clike/blob/master/llvm-w...