language: cpp
compiler:
  - gcc
  - clang
script: make -C tests test

language: cpp
matrix:
  include:
    - compiler: gcc
      env: GCC=4.7
    - compiler: gcc
      env: GCC=4.8
    - compiler: gcc
      env: GCC=4.9
    - compiler: clang
before_install:
  - if [ -n "$GCC" ]; then sudo add-apt-repository ppa:ubuntu-toolchain-r/test -y; fi
  - if [ -n "$GCC" ]; then sudo apt-get update -qq; fi
  - if [ -n "$GCC" ]; then sudo apt-get install -qq g++-$GCC;fi
  - if [ -n "$GCC" ]; then export CXX=g++-$GCC; fi
script: make -C tests test

Add gcc-4.7, gcc-4.8 and gcc-4.9 to Travis CI configuration.
Add gcc-4.7, gcc-4.8 and gcc-4.9 to Travis CI configuration.
