From patchwork Thu Dec 2 11:22:46 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Viresh Kumar X-Patchwork-Id: 520373 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 222E7C433EF for ; Thu, 2 Dec 2021 11:23:01 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1357300AbhLBL0W (ORCPT ); Thu, 2 Dec 2021 06:26:22 -0500 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:50044 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1346343AbhLBL0W (ORCPT ); Thu, 2 Dec 2021 06:26:22 -0500 Received: from mail-pl1-x632.google.com (mail-pl1-x632.google.com [IPv6:2607:f8b0:4864:20::632]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id ECAC4C06174A for ; Thu, 2 Dec 2021 03:22:59 -0800 (PST) Received: by mail-pl1-x632.google.com with SMTP id y8so20013705plg.1 for ; Thu, 02 Dec 2021 03:22:59 -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=qb7XHcV9bdfS0ofwmwIWQSLRIlkuHKmeKdMEIPGzvpw=; b=WNGWDGh5OLceO9bq/R9GUeqYyuTcn4smrkAlNTim5/y1OvVYOXDqIZjQf1lRRy9sSo OkBakBRbcqpDjdVGmObT2QXHP8tdq/OmAc+f4xi5vL5g+Q9sAxxQdXNRZ+QwVzxaRznF /+3MwgecUfIpSqiRrUaLn4U15ToW6WrZoE1V3bhzFoydZbZutpqAH2bKh2ctUTDWl11D 6s2+vWUvqqghe5uM/ZOlYEbShelFNmjbZmZENgMQnQo0XHBq8I8e8cl8TohoUT35r3ZX mUtaslz+SgTnTfMF+BIW8nF9iIyYEDJT+9uTSVUTqWiLNwk8H7/RapQcF71qI5AwdQld uQeA== 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=qb7XHcV9bdfS0ofwmwIWQSLRIlkuHKmeKdMEIPGzvpw=; b=nZX8TtVbGkPny/wqIXVsiilmand/HJEIRhnSPuYjY5BFL2RA/NGQGrwKlNgYdwkZnk +nn9sKO2miYNYNMpnTDbzCmc6K8/0seOEeQ4hbcO4G4EkMC1JNYvH0ROeiw5+FoLvRmn sgYAZ0PeaD4YxNH2ceZR+fTUew9pqRqTSIEC6Vhik8dQSzSTBeDAzzE9nduxmEdF1PET pXXD+KA7tOpqFFe8nEiortPMvJVa/ZX9RAEp7Pa2dRPMCmF+OqCX5RIv2ocFcvHk3nht z0EIPoPOOBSyqGgD4yOxUb9V1aj2W+uv/51EpVQuatf5nTDIt0i/zrWHdUs3pFDj7bwD 1OCw== X-Gm-Message-State: AOAM5338C++l4Q39vgjkEzmzLyoKyp6Qj8ipXB/yxvx/QRQteh9TAjHN JTQul18Z2Lsov0jXQwegjHHTpg== X-Google-Smtp-Source: ABdhPJzQH24dkCX3tAQirxcmEWlHuKWkShX+OtaG3KB7sSyUVIvrnzV6dLJS5gp9R8KQdi8wkzeEbg== X-Received: by 2002:a17:90b:1e0e:: with SMTP id pg14mr5176397pjb.143.1638444179499; Thu, 02 Dec 2021 03:22:59 -0800 (PST) Received: from localhost ([106.201.42.111]) by smtp.gmail.com with ESMTPSA id z4sm3340744pfh.15.2021.12.02.03.22.58 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Thu, 02 Dec 2021 03:22:59 -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 V2 1/4] libgpiod: Generate rust FFI bindings Date: Thu, 2 Dec 2021 16:52:46 +0530 Message-Id: <7c02af9b06fcfdbfd2c6096992c9f7dc047cd643.1638443930.git.viresh.kumar@linaro.org> 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 | 5 +++ 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, 95 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..0d3a842734bf 100644 --- a/.gitignore +++ b/.gitignore @@ -29,3 +29,8 @@ libtool *-libtool m4/ stamp-h1 + +# Added by cargo + +bindings/rust/target +bindings/rust/Cargo.lock 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"