From 33d8139f57d5105148b7f26d5354ba0a50e6264d Mon Sep 17 00:00:00 2001
From: Syrone Wong <wong.syrone@gmail.com>
Date: Mon, 9 Jan 2017 19:36:39 +0800
Subject: [PATCH] Speed up ndk-build from sbt-android

Signed-off-by: Syrone Wong <wong.syrone@gmail.com>
---
 .travis.yml | 2 +-
 build.sbt   | 5 +++++
 2 files changed, 6 insertions(+), 1 deletion(-)

diff --git a/.travis.yml b/.travis.yml
index 22364c17..febc039b 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -50,4 +50,4 @@ install:
       fi
 
 script:
-    - $SBTPATH/sbt native-build android:package-debug
+    - $SBTPATH/sbt -DNPROC=$(nproc) native-build android:package-debug
diff --git a/build.sbt b/build.sbt
index 35561582..c0e66980 100644
--- a/build.sbt
+++ b/build.sbt
@@ -8,6 +8,11 @@ name := "shadowsocks"
 version := "3.4.1"
 versionCode := Some(173)
 
+// Speed up ndk-build by reading nproc from environment
+// and default to 8
+val nproc = sys.props.getOrElse("NPROC", default = "8")
+ndkArgs := Seq(s"-j$nproc")
+
 platformTarget := "android-25"
 
 compileOrder := CompileOrder.JavaThenScala