| bssl-sys | |
| ============ | |
| A low-level binding crate for Rust that moves in lockstop with BoringSSL. | |
| ### How it works | |
| `bssl-sys` uses `bindgen` as part of the cmake build process to generate Rust compatibility shims for the targeted platform. It is important to generate it for the correct platform because `bindgen` uses LLVM information for alignment which varies depending on architecture. | |
| ### To Use | |
| 1. Build `boringssl` with `-DRUST_BINDINGS=<rust-triple>`, which should match the [Rust target triple](https://doc.rust-lang.org/nightly/rustc/platform-support.html) when building `bssl-sys`. For example, to build on 64-bit Linux: | |
| cmake -GNinja -B build -DRUST_BINDINGS=x86_64-unknown-linux-gnu | |
| ninja -C build | |
| 2. Install `bindgen`. | |
| 3. Install [`cargo-deny`](https://github.com/EmbarkStudios/cargo-deny). | |
| After that, the `bssl-sys` crate can be built via `cargo`. By default, it looks for `bindgen` output and BoringSSL static libraries in the `build` directory. This can be reconfigured with `BORINGSSL_BUILD_DIR` environment variable. Note the environment variable is evaluated relative to `rust/bssl-sys/src`, so using an absolute path may be more convenient. |