language: c
matrix:
  include:
    # Access more recent gcc and clang via a Trusty image
    - os: linux
      dist: trusty
      compiler: gcc
    - os: linux
      dist: trusty
      compiler: clang
    - os: osx
      compiler: gcc
    - os: osx
      compiler: clang
script:
  - make CFLAGS='-Werror'
  - make CFLAGS='-Wall -Wextra -Werror'