From fc15cf5926e4abde9b0e15cccc0c1c9a0987bb2c Mon Sep 17 00:00:00 2001
From: Wictor Lund <wlund@abo.fi>
Date: Thu, 31 Mar 2016 09:04:25 +0300
Subject: [PATCH] build: multi-cpu build support

---
 sys/Cargo.toml | 3 +++
 sys/build.rs   | 6 +++++-
 2 files changed, 8 insertions(+), 1 deletion(-)

diff --git a/sys/Cargo.toml b/sys/Cargo.toml
index 1ef5509..7bd2992 100644
--- a/sys/Cargo.toml
+++ b/sys/Cargo.toml
@@ -14,6 +14,9 @@ keywords    = ["audio", "video"]
 [dependencies]
 libc = "0.2"
 
+[build-dependencies]
+num_cpus = "0.2.11"
+
 [features]
 default  = ["avcodec", "avdevice", "avfilter", "avformat", "avresample", "swresample", "swscale"]
 
diff --git a/sys/build.rs b/sys/build.rs
index e820a6d..9cd0f58 100644
--- a/sys/build.rs
+++ b/sys/build.rs
@@ -1,3 +1,5 @@
+extern crate num_cpus;
+
 use std::env;
 use std::fs::{self, File};
 use std::io::{self, Write};
@@ -207,7 +209,9 @@ fn build() -> io::Result<()> {
 	}
 
 	// run make
-	if !try!(Command::new("make").current_dir(&source()).status()).success() {
+	if !try!(Command::new("make")
+		.arg("-j").arg(num_cpus::get().to_string())
+		.current_dir(&source()).status()).success() {
 		return Err(io::Error::new(io::ErrorKind::Other, "make failed"));
 	}