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build.rs supports android #407

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build.rs supports android #407

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31 changes: 30 additions & 1 deletion build.rs
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Original file line number Diff line number Diff line change
Expand Up @@ -7,7 +7,32 @@
extern crate gcc;

use std::env;
use std::path::Path;
use std::path::{Path, PathBuf};

const ANDROID_AARCH64_COMPILER: &'static str = "toolchains/aarch64-linux-android-4.9/prebuilt/darwin-x86_64/bin";
const ANDROID_ARM_COMPILER: &'static str = "toolchains/arm-linux-androideabi-4.9/prebuilt/darwin-x86_64/bin";
const ANDROID_I686_COMPILER: &'static str = "toolchains/x86-4.9/prebuilt/darwin-x86_64/bin";
const ANDROID_INCLUDE: &'static str = "platforms/android-21/arch-arm64/usr/include";

fn concat_paths(first: &str, second: &str) -> PathBuf {
let mut path = PathBuf::from(first);
path.push(second);
path
}

fn setup_android(config: &mut gcc::Config) {
let path = env::var_os("PATH").unwrap();
let ndk_home = env::var("NDK_HOME").expect("NDK_HOME is not set");
let mut paths = env::split_paths(&path).collect::<Vec<_>>();
paths.push(concat_paths(&ndk_home, ANDROID_AARCH64_COMPILER));
paths.push(concat_paths(&ndk_home, ANDROID_ARM_COMPILER));
paths.push(concat_paths(&ndk_home, ANDROID_I686_COMPILER));

let new_path = env::join_paths(paths).unwrap();
env::set_var("PATH", new_path);

config.include(&concat_paths(&ndk_home, ANDROID_INCLUDE));
}

fn main() {
let target = env::var("TARGET").unwrap();
Expand All @@ -25,6 +50,10 @@ fn main() {
let mut cfg = gcc::Config::new();
cfg.file("src/util_helpers.c");
cfg.file("src/aesni_helpers.c");
if target.contains("android") {
setup_android(&mut cfg);
}

if env::var_os("CC").is_none() {
if host.contains("openbsd") {
// Use clang on openbsd since there have been reports that
Expand Down