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hyper/capi/README.md
Rémy Rakic 1e9cd4f292 docs(ffi): document nightly requirement for FFI 
Update the command to use `--crate-type`.
2022-03-03 15:05:42 -08:00

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C API for hyper

This provides auxiliary pieces for a C API to use the hyper library.

Unstable

The C API of hyper is currently unstable, which means it's not part of the semver contract as the rest of the Rust API is.

Because of that, it's only accessible if --cfg hyper_unstable_ffi is passed to rustc when compiling. The easiest way to do that is setting the RUSTFLAGS environment variable.

Building

The C API is part of the Rust library, but isn't compiled by default. Using a nightly release of cargo, starting with nightly-2022-03-02, it can be compiled with the following command:

RUSTFLAGS="--cfg hyper_unstable_ffi" cargo +nightly rustc --features client,http1,http2,ffi -Z unstable-options --crate-type cdylib