# Longdouble This crate provides the type alias `c_longdouble` for FFI interoperability with C's `long double`. It does not provide any new types. The exact type that `c_longdouble` aliases to is based on . Currently the only bindings available are for targets where `long double` is `f64`. Once the [`f128` and `f116` RFC](https://github.com/rust-lang/rfcs/pull/3453) becomes usable, platforms that use `f128` will be supported. If the [additional float types RFC](https://github.com/rust-lang/rfcs/pull/3451) lands, bindings for f80 will also be supported.