From 04ae47a8029500fcc325c679a0ad09bf36efb9d1 Mon Sep 17 00:00:00 2001
From: OGINO Masanori <masanori.ogino@gmail.com>
Date: Thu, 2 Jul 2015 07:27:11 +0900
Subject: [PATCH] Use container-based infrastructure of Travis.

It's faster than standard (hypervisor-based) one, so we will benefit
from it, especially when we want larger build matrix.

I thought we can't use it since it restricts the use of ``sudo``.
However, Travis provides ``addon`` feature to install additional
packages from container-based infrastructure.

References:
http://docs.travis-ci.com/user/workers/container-based-infrastructure/
http://docs.travis-ci.com/user/apt/

Signed-off-by: OGINO Masanori <masanori.ogino@gmail.com>
---
 .travis.yml | 8 +++++---
 1 file changed, 5 insertions(+), 3 deletions(-)

diff --git a/.travis.yml b/.travis.yml
index 219464fe..2fb459e5 100644
--- a/.travis.yml
+++ b/.travis.yml
@@ -1,13 +1,15 @@
+sudo: false
 language: c
 compiler:
   - gcc
   - clang
+addons:
+  apt:
+    packages:
+      - gcc-multilib
 env:
   - CFLAGS="-m32"
   - CFLAGS="-m64"
-before_script:
-  - sudo apt-get update -qq
-  - sudo apt-get install -y gcc-multilib
 script:
   - perl --version
   - make test