From patchwork Mon Nov 29 10:42:22 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 517068 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id AACD7C433EF for ; Mon, 29 Nov 2021 11:29:45 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S234652AbhK2LdC (ORCPT ); Mon, 29 Nov 2021 06:33:02 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:55010 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S241940AbhK2LbB (ORCPT ); Mon, 29 Nov 2021 06:31:01 -0500 Received: from mail-pl1-x62a.google.com (mail-pl1-x62a.google.com [IPv6:2607:f8b0:4864:20::62a]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id 167BBC08EAC9 for ; Mon, 29 Nov 2021 02:42:31 -0800 (PST) Received: by mail-pl1-x62a.google.com with SMTP id o14so11826208plg.5 for ; Mon, 29 Nov 2021 02:42:31 -0800 (PST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=linaro.org; s=google; h=from:to:cc:subject:date:message-id:in-reply-to:references :mime-version:content-transfer-encoding; bh=y42wHLnBaM0UkhWxtkOYP/6OMdTpF5w+ZF85RKVObZY=; b=ONps0jn35Tt4C5oYgB6rpbnNSr3mdu9hIQ7l9kPnKb/Sqhu5PAYdmcHJzaDntzKSqR 2xzHcElYdsaTaaXSEtBYPyqkNRR9AoA3cN5F8ahnSeU3ZSd1NgGIne3C+z2tGzrIl9Ox lplC9dYiY+R0iVidZoxoreALjlS/L8QeT5jyJg1zH6bYa72G2YX0mPDRvN7cpnDQvuxZ rpaCJv6yV/f5/bVJL0mf2ME5/l9Mc2lWb+n67FjQmT7gHNjg8g6RHNlhsJA+idVGnI+H I8/7vBvZpMirOWDTh/qdBXJVGWSrry3RD36uX5euseo+BBNLeguIBc8L6L9WOomELfPo PQ9w== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:in-reply-to :references:mime-version:content-transfer-encoding; bh=y42wHLnBaM0UkhWxtkOYP/6OMdTpF5w+ZF85RKVObZY=; b=qEaZ1qfK03d62LU74RfiNLReDdhFVP5k9f39YxkytANiFkQA+XjtBu+hVKDXb3mNlB 0nfn7nzP7K2ABujSTEOyZxdanqUG2r108SUuFXtuPeL1h01SK5Ng+6HoOLymNf9l84GA LCLffkGethVJXjURLfG9nO64zc6u/+rGryfaJcjoZ9ht6kMzh78JSzOwiA1pn0GZqQ4T GUOVgGOWHgdLMU7RCmabS+aJfKYV9ANS5JVbiti3NafqTj0LIjHvBmLobM8OrUigCpxk LQIP2yoa01qqLalCtOH5B9vjipTd/R9/BKmdIuL5lF8GuI413TpdSd0nhCV4ytf/VhvF eo3Q== X-Gm-Message-State: AOAM533JLdCfjTfkxCl0fmsd2VQRnTeFTvXKnwGAKP7RYrb6o7hjGqiL OtaUqOPq5ino7N/fS9+hBQ+8Vg== X-Google-Smtp-Source: ABdhPJy1KUf7obEcx4a5ZtXHFGnGKG+aGeJAaIkV2YvnTQM1kOgbR0GiMGr/arBmYcokMsGJsSKFtQ== X-Received: by 2002:a17:90b:4ad1:: with SMTP id mh17mr37273213pjb.33.1638182550582; Mon, 29 Nov 2021 02:42:30 -0800 (PST) Received: from localhost ([122.171.9.64]) by smtp.gmail.com with ESMTPSA id t3sm15457398pfj.207.2021.11.29.02.42.29 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Mon, 29 Nov 2021 02:42:30 -0800 (PST) From: Viresh Kumar To: Linus Walleij , Bartosz Golaszewski Cc: Viresh Kumar , Vincent Guittot , linux-gpio@vger.kernel.org, Kent Gibson , Miguel Ojeda , Wedson Almeida Filho , =?utf-8?q?Alex_Benn=C3=A9e?= , stratos-dev@op-lists.linaro.org Subject: [PATCH 1/2] libgpiod: Generate rust FFI bindings Date: Mon, 29 Nov 2021 16:12:22 +0530 Message-Id: X-Mailer: git-send-email 2.31.1.272.g89b43f80a514 In-Reply-To: References: MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-gpio@vger.kernel.org Build FFI bindings for the libgpiod helpers. Signed-off-by: Viresh Kumar --- .gitignore | 6 ++++ bindings/rust/Cargo.toml | 12 +++++++ bindings/rust/build.rs | 60 +++++++++++++++++++++++++++++++++++ bindings/rust/src/bindings.rs | 16 ++++++++++ bindings/rust/src/lib.rs | 0 bindings/rust/wrapper.h | 2 ++ 6 files changed, 96 insertions(+) create mode 100644 bindings/rust/Cargo.toml create mode 100644 bindings/rust/build.rs create mode 100644 bindings/rust/src/bindings.rs create mode 100644 bindings/rust/src/lib.rs create mode 100644 bindings/rust/wrapper.h diff --git a/.gitignore b/.gitignore index 2d7cc7fc0758..8b82ada3bc80 100644 --- a/.gitignore +++ b/.gitignore @@ -29,3 +29,9 @@ libtool *-libtool m4/ stamp-h1 + +# Added by cargo + +bindings/rust/target +bindings/rust/Cargo.lock +bindings/rust/bindings_gen.rs diff --git a/bindings/rust/Cargo.toml b/bindings/rust/Cargo.toml new file mode 100644 index 000000000000..62f3d52ddb0f --- /dev/null +++ b/bindings/rust/Cargo.toml @@ -0,0 +1,12 @@ +[package] +name = "libgpiod" +version = "0.1.0" +edition = "2021" + +# See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html + +[dependencies] + +[build-dependencies] +bindgen = "0.59.1" +cc = "1.0.46" diff --git a/bindings/rust/build.rs b/bindings/rust/build.rs new file mode 100644 index 000000000000..cd776332bbb9 --- /dev/null +++ b/bindings/rust/build.rs @@ -0,0 +1,60 @@ +extern crate bindgen; + +use std::env; +use std::path::PathBuf; + +fn generate_bindings() { + // Tell cargo to invalidate the built crate whenever the wrapper changes + println!("cargo:rerun-if-changed=wrapper.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("wrapper.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 build_gpiod() { + // Tell Cargo that if the given file changes, to rerun this build script. + println!("cargo:rerun-if-changed=../../lib/"); + + let files = vec![ + "../../lib/chip.c", + "../../lib/edge-event.c", + "../../lib/info-event.c", + "../../lib/internal.c", + "../../lib/line-config.c", + "../../lib/line-info.c", + "../../lib/line-request.c", + "../../lib/misc.c", + "../../lib/request-config.c", + ]; + + // Use the `cc` crate to build a C file and statically link it. + cc::Build::new() + .files(files) + .define("_GNU_SOURCE", None) + .define("GPIOD_VERSION_STR", "\"libgpio-rust\"") + .include("../../include") + .compile("gpiod"); +} + +fn main() { + generate_bindings(); + build_gpiod(); +} diff --git a/bindings/rust/src/bindings.rs b/bindings/rust/src/bindings.rs new file mode 100644 index 000000000000..7d6caa7d9c11 --- /dev/null +++ b/bindings/rust/src/bindings.rs @@ -0,0 +1,16 @@ +// SPDX-License-Identifier: GPL-2.0 + +#[allow( + clippy::all, + deref_nullptr, + dead_code, + non_camel_case_types, + non_upper_case_globals, + non_snake_case, + improper_ctypes +)] + +mod bindings_raw { + include!(concat!(env!("OUT_DIR"), "/bindings.rs")); +} +pub use bindings_raw::*; diff --git a/bindings/rust/src/lib.rs b/bindings/rust/src/lib.rs new file mode 100644 index 000000000000..e69de29bb2d1 diff --git a/bindings/rust/wrapper.h b/bindings/rust/wrapper.h new file mode 100644 index 000000000000..50dc5f4db406 --- /dev/null +++ b/bindings/rust/wrapper.h @@ -0,0 +1,2 @@ +#include +#include "../../include/gpiod.h"