dist: trusty
sudo: false
group: beta
language: ruby
before_install:
  - gem install bundler
script:
  - bundle exec rake compile || bundle exec rake compile
  - bundle exec rake test
os:
  - linux
  - osx
rvm:
  - 2.3.8
  - 2.4.5
  - 2.5.3
  - 2.6.0
  - ruby-head
  - system
env:
  - CC=gcc
  - CC=clang
matrix:
  allow_failures:
    - rvm: system
    - os: osx
      rvm: ruby-head
  exclude: # ruby 2.4.2 needs build with xcode9 or later on osx
    - os: osx
      rvm: 2.4.2
  include:
    - os: osx
      osx_image: xcode9.1
      rvm: 2.4.2
      env:
      - CC=gcc
    - os: osx
      osx_image: xcode9.1
      rvm: 2.4.2
      env:
      - CC=clang
after_failure:
  - "find build -name mkmf.log | xargs cat"