I have incorporated the following macro abuse to prepend the number of arguments to a variadic functions into my projects: https://gist.github.com/61131/7a22ac46062ee292c2c8bd6d883d28.... It does introduce some overhead, but it suits my needs for the projects that I am working on.

That being said, I would like it if the default types for variadic functions were promoted from int/float to int64_t/double in order to be more reflective of the wider ranges supported by these types.