aarch64-nintendo-horizon.json

{
  "abi-blacklist": [
    "stdcall",
    "fastcall",
    "vectorcall",
    "thiscall",
    "win64",
    "sysv64"
  ],
  "arch": "aarch64",
  "data-layout": "e-m:e-i8:8:32-i16:16:32-i64:64-i128:128-n32:64-S128",
  "env": "horizon",
  "has-elf-tls": false,
  "has-rpath": true,
  "linker-flavor": "ld",
  "llvm-target": "aarch64-unknown-none",
  "max-atomic-width": 128,
  "position-independent-executables": true,
  "os": "horizon",
  "pre-link-args": {
    "gcc": [
      "-Wl,--as-needed",
      "-Wl,-z,noexecstack"
    ]
  },
  "relro-level": "full",
  "target-endian": "little",
  "target-pointer-width": "64",
  "target-c-int-width": "32",
  "vendor": "nintendo",
  "cpu": "cortex-a53",
  "eliminate-frame-pointer": false,
  "panic-strategy": "abort",
  "dynamic-linking": true,
  "linker": "ld.lld"
}

build.rs

extern crate bindgen;

use std::env;
use std::path::PathBuf;

fn main() {
    println!("cargo:rustc-link-lib=static=transistor.nro");
    println!("cargo:rustc-link-search=native=libtransistor/build/lib");

    let bindings = bindgen::Builder::default()
        .header("libtransistor/include/libtransistor/nx.h")
        // Don't use host headers, to make sure we're building against newlib
        .clang_arg("-nostdinc")
        // Include the newlib/transistor headers, and the clang builtin headers
        .clang_args(&["-isystem", "/usr/lib/clang/5.0.0/include"])
        .clang_args(&["-isystem", "libtransistor/newlib/newlib/libc/include"])
        .clang_args(&["-isystem", "libtransistor/newlib/newlib/libc/sys/switch/include"])
        .clang_arg("-Ilibtransistor/include")
        // We don't need to define those types, rust has them already anyways.
        // Blacklisting avoids a bug in bindgen where it creates cyclic references
        // (pub type u8 = u8)
        .blacklist_type("u(8|16|32|64)")
        .use_core()
        .ctypes_prefix("::libc")
        .rustfmt_bindings(true)
        .rustfmt_configuration_file(None)
        .generate()
        .expect("Unable to generate bindings");

    let out_path = PathBuf::from(env::var("OUT_DIR").unwrap());
    bindings
        .write_to_file(out_path.join("bindings.rs"))
        .expect("Couldn't write bindings!");
}

Cargo.toml

[package]
authors = ["roblabla <unfiltered@roblab.la>"]
name = "libtransistor-sys"
version = "0.1.0"

[build-dependencies]
bindgen = "0.31.3"

[dependencies.libc]
version = "0.2.33"
default-features = false

lib.rs

#![no_std]
extern crate libc;

include!(concat!(env!("OUT_DIR"), "/bindings.rs"));

#[cfg(test)]
mod tests {
    #[test]
    fn it_works() {
        assert_eq!(2 + 2, 4);
    }
}

   Compiling libc v0.2.33
   Compiling libtransistor-sys v0.1.0 (file:///home/roblabla/Dropbox/dev/src/rust/libtransistor-rs/libtransistor-sys)
error[E0463]: can't find crate for `std`
  |
  = note: the `aarch64-nintendo-horizon` target may not be installed

error: aborting due to previous error

error: Could not compile `libc`.
warning: build failed, waiting for other jobs to finish...
error: build failed