The C libffi library provides two main facilities: assembling calls to functions dynamically, and creating closures that can be called as ordinary C functions. This is an undocumented wrapper, generated by bindgen, intended as the basis for higher-level bindings, but you can see the [libffi documentation].
If you clone this repository in order to build the library and you do
not plan to enable the system Cargo feature to build against your
system’s C libffi, then you should do a recursive clone, by default this
library builds C libffi from a Git submodule.
See [the libffi crate] for a higher-level API.
libffi-sys can either build its own copy of the libffi C library from
github or it can link against your
system’s C libffi. By default it builds its own because many systems
ship with an old C libffi; this requires that you have a working make,
C compiler, automake, and autoconf first. If your system libffi
is new enough (v3.2.1 as of October 2019), you can instead enable the
system feature flag to use that. If you want this crate to build
a C libffi for you, add
toml
[dependencies]
libffi-sys = "1.0.0"
to your Cargo.toml. If you want to use your system C libffi, then
toml
[dependencies.libffi-sys]
version = "1.0.0"
features = ["system"]
to your Cargo.toml instead.
This crate supports Rust version 1.32 and later.