message: Disable xcode 6.4 and g++-5 on macos
diff: @@ -94,9 +94,9 @@ matrix:
  packages: ["clang-5.0", "g++-7"]
  sources: *apt_sources
  - - env: COMPILER=clang++
  - osx_image: xcode6.4
  - os: osx
  + # - env: COMPILER=clang++
  + # osx_image: xcode6.4
  + # os: osx
  # - env: COMPILER=clang++
  # osx_image: xcode7.3
  @@ -126,10 +126,10 @@ matrix:
  osx_image: xcode9.1
  os: osx
  - - env: COMPILER=g++-5
  - compiler: gcc
  - osx_image: xcode9.1
  - os: osx
  + # - env: COMPILER=g++-5
  + # compiler: gcc
  + # osx_image: xcode9.1
  + # os: osx
  # - env: COMPILER=g++-6
  # compiler: gcc
  