language: c

matrix:
  include:
# OSX standard test build
# this is really a GCC frontend with an LLVM back-end
    - os: osx
      env:
        - MATRIX_EVAL="CC=gcc && CXX=g++"

# OSX and pure GCCs
# https://docs.travis-ci.com/user/languages/c/#GCC-on-OS-X
    - os: osx
      env:
        - MATRIX_EVAL="CC=gcc-4.9 && CXX=g++-4.9"

    - os: osx
      env:
        - MATRIX_EVAL="brew install gcc5 && CC=gcc-5 && CXX=g++-5"

    - os: osx
      env:
        - MATRIX_EVAL="brew install gcc6 && CC=gcc-6 && CXX=g++-6"

    - os: osx
      env:
        - MATRIX_EVAL="brew install gcc && CC=gcc-7 && CXX=g++-7"

# OSX and pure LLVMs - the version is controlled by the osx_image variable
# images as per https://blog.travis-ci.com/2017-10-16-a-new-default-os-x-image-is-coming
    - os: osx
      osx_image: xcode6.4
      env:
        - MATRIX_EVAL="CC=clang && CXX=clang"

    - os: osx
      osx_image: xcode7.3
      env:
        - MATRIX_EVAL="CC=clang && CXX=clang"

    - os: osx
      osx_image: xcode8.3
      env:
        - MATRIX_EVAL="CC=clang && CXX=clang"

    - os: osx
      osx_image: xcode9
      env:
        - MATRIX_EVAL="CC=clang && CXX=clang"

    - os: osx
      osx_image: xcode9.1
      env:
        - MATRIX_EVAL="CC=clang && CXX=clang"

# Linux and GCCs
    # gcc 4.8 at the time of writing
    - os: linux
      dist: trusty
      env:
        - MATRIX_EVAL="CC=gcc && CXX=g++"

# for newer GCCs, add ubuntu-toolchain-r-test
# https://docs.travis-ci.com/user/languages/c/
    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-4.9
      env:
         - MATRIX_EVAL="CC=gcc-4.9 && CXX=g++-4.9"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-5
      env:
         - MATRIX_EVAL="CC=gcc-5 && CXX=g++-5"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-6
      env:
        - MATRIX_EVAL="CC=gcc-6 && CXX=g++-6"


    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
          packages:
            - g++-7
      env:
        - MATRIX_EVAL="CC=gcc-7 && CXX=g++-7"

# Linux and LLVMs
# https://docs.travis-ci.com/user/languages/c/#Clang
    - os: linux
      dist: trusty
      env:
        - MATRIX_EVAL="CC=clang && CXX=clang"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
            - llvm-toolchain-precise-3.6
          packages:
            - clang-3.6
      env:
        - MATRIX_EVAL="CC=clang-3.6 && CXX=clang++-3.6"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
            - llvm-toolchain-precise-3.7
          packages:
            - clang-3.7
      env:
        - MATRIX_EVAL="CC=clang-3.7 && CXX=clang++-3.7"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - ubuntu-toolchain-r-test
            - llvm-toolchain-precise-3.8
          packages:
            - clang-3.8
      env:
        - MATRIX_EVAL="CC=clang-3.8 && CXX=clang++-3.8"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - llvm-toolchain-trusty-3.9
          packages:
            - clang-3.9
      env:
        - MATRIX_EVAL="CC=clang-3.9 && CXX=clang++-3.9"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - llvm-toolchain-trusty-4.0
          packages:
            - clang-4.0
      env:
        - MATRIX_EVAL="CC=clang-4.0 && CXX=clang++-4.0"

    - os: linux
      dist: trusty
      addons:
        apt:
          sources:
            - llvm-toolchain-trusty-5.0
          packages:
            - clang-5.0
      env:
        - MATRIX_EVAL="CC=clang-5.0 && CXX=clang++-5.0"


before_install:
# avoid issues with outdated Homebrew installation on Mac OSX by updating it
# before anything else
# TODO: remove "brew update" line after 2017-11-15, see https://blog.travis-ci.com/2017-10-16-a-new-default-os-x-image-is-coming and
# https://github.com/travis-ci/travis-ci/issues/8552
    - if [[ "$TRAVIS_OS_NAME" == "osx" ]]; then brew update; fi
    - eval "${MATRIX_EVAL}"

script: autoreconf -V && autoreconf --force && ./configure && cat config.log && make && make check