*Created originally on Bitbucket by [pitrou (Antoine Pitrou)](https://bitbucket.org/%7B31bb1d50-82ea-4cd4-9100-029dc7a65f99%7D/)* Browsing through the docs, it isn't possible to create a function pointer to a plain existing C function. cffi has `ffi.callback` which allows to create a C function pointer to a Python function; but you can't just create a C function pointer from either the function's name (symbol) or its numeric address. `ctypes` lets you do it from the function's address. (for the record, in my use case, the function doesn't exist at the C level, as it's generated by LLVM, but the basic point stands)