.travis.yml

language: cpp
dist: trusty

matrix:
  fast_finish: true
  include:
    - os: linux
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-6
            - cmake
      env:
         - MATRIX_EVAL="CC=gcc-6 && CXX=g++-6"
    - os: linux
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-7
            - cmake
      env:
         - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"
    - os: linux
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-8
            - cmake
      env:
         - MATRIX_EVAL="CC=gcc-8 && CXX=g++-8"
    - os: linux
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-9
            - cmake
      env:
         - MATRIX_EVAL="CC=gcc-9 && CXX=g++-9"
         
before_install:
    - eval "${MATRIX_EVAL}"

script:
  - mkdir build
  - cd build
  - cmake ..
  - make