It's not enough :-) Ask the OCaml folks, they're going through this pain right now because their stdlib modules are called `Array`, `List`, and so on. They're planning to put them all under `Stdlib`, so e.g. `Stdlib.Array` and so on, but it's going to be a big effort with a lot of pain.

The main problem will arise when users create their own libraries; suppose some people create a `Option` libraries and then later you want to add a standard option type to Carp, it will be painful. Better to namespace your stuff under `Carp` from the beginning, so e.g. `Carp_IO_println`, `Carp_Option_map`, and so on.