sig
type t =
External
| Available_externally
| Link_once
| Link_once_odr
| Link_once_odr_auto_hide
| Weak
| Weak_odr
| Appending
| Internal
| Private
| Dllimport
| Dllexport
| External_weak
| Ghost
| Common
| Linker_private
| Linker_private_weak
end