.travis.yml

language: cpp
sudo: true
dist: bionic

script:
  - make

matrix:
  include:
    # - os: linux
    #   language: cpp
    #   addons:
    #     apt:
    #       sources:
    #         - ubuntu-toolchain-r-test
    #         - sourceline: 'ppa:ubuntu-toolchain-r/test'
    #       packages:
    #         - gcc-9
    #         - g++-9
    #         - xcb
    #         - xcb-proto
    #         - libx11-dev
    #         - libx11-xcb-dev
    #         - libxcb1-dev
    #         - libxcb-util-dev
    #         - libxcb-icccm4-dev
    #         - libxcb-randr0-dev
    #         - libxcb-keysyms1-dev

    #   env:
    #     - MATRIX_EVAL="CC=gcc-9 CXX=g++-9"

    - os: linux
      language: cpp
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
            - sourceline: 'deb https://apt.llvm.org/bionic/ llvm-toolchain-bionic-9 main'
              key_url: 'https://apt.llvm.org/llvm-snapshot.gpg.key'
          packages:
            - clang-9
            - xcb
            - xcb-proto
            - libx11-dev
            - libx11-xcb-dev
            - libxcb1-dev
            - libxcb-util-dev
            - libxcb-icccm4-dev
            - libxcb-randr0-dev
            - libxcb-keysyms1-dev
            - libxcb-ewmh-dev
            - libx11-dev

      env:
        - MATRIX_EVAL="CC=clang-9 CXX=clang++-9"

before_install:
  - eval "${MATRIX_EVAL}"

# install:
#   - sudo update-alternatives --install /usr/bin/gcc gcc /usr/bin/gcc-9 60 --slave /usr/bin/g++ g++ /usr/bin/g++-9
#   - sudo update-alternatives --config gcc