language: c
compiler:
  - gcc
  - clang
env:
  - CFLAGS="-m32"
  - CFLAGS="-m64"
before_script:
  - sudo apt-get update -qq
  - sudo apt-get install -y gcc-multilib
script:
  - perl --version
  - make test
  - make clean
  - make debug
  - make test 2> /dev/null >/dev/null

sudo: false
language: c
compiler:
  - gcc
  - clang
addons:
  apt:
    packages:
      - gcc-multilib
env:
  - CFLAGS="-m32"
  - CFLAGS="-m64"
script:
  - perl --version
  - make test
  - make clean
  - make debug
  - make test 2> /dev/null >/dev/null

Use container-based infrastructure of Travis.
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 <c49462fef669560e618607913e6c283f7627123c@gmail.com>
