This adds libgpiod-sys rust crate, which provides FFI (foreign function interface) bindings for libgpiod APIs.
Signed-off-by: Viresh Kumar viresh.kumar@linaro.org --- .gitignore | 5 ++++ bindings/rust/Cargo.toml | 5 ++++ bindings/rust/libgpiod-sys/Cargo.toml | 20 +++++++++++++ bindings/rust/libgpiod-sys/build.rs | 41 +++++++++++++++++++++++++++ bindings/rust/libgpiod-sys/src/lib.rs | 13 +++++++++ 5 files changed, 84 insertions(+) create mode 100644 bindings/rust/Cargo.toml create mode 100644 bindings/rust/libgpiod-sys/Cargo.toml create mode 100644 bindings/rust/libgpiod-sys/build.rs create mode 100644 bindings/rust/libgpiod-sys/src/lib.rs
diff --git a/.gitignore b/.gitignore index 6c08415b390d..9f2fcf440c5d 100644 --- a/.gitignore +++ b/.gitignore @@ -35,3 +35,8 @@ stamp-h1 # profiling *.gcda *.gcno + +# Added by cargo + +target +Cargo.lock diff --git a/bindings/rust/Cargo.toml b/bindings/rust/Cargo.toml new file mode 100644 index 000000000000..c7bbcc798920 --- /dev/null +++ b/bindings/rust/Cargo.toml @@ -0,0 +1,5 @@ +[workspace] + +members = [ + "libgpiod-sys" +] diff --git a/bindings/rust/libgpiod-sys/Cargo.toml b/bindings/rust/libgpiod-sys/Cargo.toml new file mode 100644 index 000000000000..47d0c2a7311c --- /dev/null +++ b/bindings/rust/libgpiod-sys/Cargo.toml @@ -0,0 +1,20 @@ +[package] +name = "libgpiod-sys" +version = "0.1.0" +authors = ["Viresh Kumar viresh.kumar@linaro.org"] +description = "libgpiod public header bindings" +repository = "https://git.kernel.org/pub/scm/libs/libgpiod/libgpiod.git" +categories = ["external-ffi-bindings", "os::linux-apis"] +rust-version = "1.56" +keywords = ["libgpiod", "gpio"] +license = "Apache-2.0 OR BSD-3-Clause" +edition = "2021" + +[dependencies] + +[features] +generate = [ "bindgen" ] + +[build-dependencies] +bindgen = { version = "0.59.1", optional = true } +cc = "1.0.46" diff --git a/bindings/rust/libgpiod-sys/build.rs b/bindings/rust/libgpiod-sys/build.rs new file mode 100644 index 000000000000..98863686c7af --- /dev/null +++ b/bindings/rust/libgpiod-sys/build.rs @@ -0,0 +1,41 @@ +#[cfg(feature = "generate")] +extern crate bindgen; +#[cfg(feature = "generate")] +use std::env; +#[cfg(feature = "generate")] +use std::path::PathBuf; + +#[cfg(feature = "generate")] +fn generate_bindings() { + // Tell cargo to invalidate the built crate whenever following files change + println!("cargo:rerun-if-changed=../../../include/gpiod.h"); + + // The bindgen::Builder is the main entry point + // to bindgen, and lets you build up options for + // the resulting bindings. + let bindings = bindgen::Builder::default() + // The input header we would like to generate + // bindings for. + .header("../../../include/gpiod.h") + // Tell cargo to invalidate the built crate whenever any of the + // included header files changed. + .parse_callbacks(Box::new(bindgen::CargoCallbacks)) + // Finish the builder and generate the bindings. + .generate() + // Unwrap the Result and panic on failure. + .expect("Unable to generate bindings"); + + // Write the bindings to the $OUT_DIR/bindings.rs file. + let out_path = PathBuf::from(env::var("OUT_DIR").unwrap()); + bindings + .write_to_file(out_path.join("bindings.rs")) + .expect("Couldn't write bindings!"); +} + +fn main() { + #[cfg(feature = "generate")] + generate_bindings(); + + println!("cargo:rustc-link-search=./../../lib/.libs/"); + println!("cargo:rustc-link-lib=static=gpiod"); +} diff --git a/bindings/rust/libgpiod-sys/src/lib.rs b/bindings/rust/libgpiod-sys/src/lib.rs new file mode 100644 index 000000000000..a1d1db19afe3 --- /dev/null +++ b/bindings/rust/libgpiod-sys/src/lib.rs @@ -0,0 +1,13 @@ +// SPDX-License-Identifier: Apache-2.0 OR BSD-3-Clause + +#[allow(non_camel_case_types, non_upper_case_globals)] +#[cfg_attr(test, allow(deref_nullptr, non_snake_case))] + +mod bindings_raw { + #[cfg(feature = "generate")] + include!(concat!(env!("OUT_DIR"), "/bindings.rs")); + + #[cfg(not(feature = "generate"))] + include!("bindings.rs"); +} +pub use bindings_raw::*;