message: construction_worker: trying to install g++ to make clang work
diff: @@ -216,6 +216,10 @@ matrix:
  - os: linux
  env: LLVM_VERSION=3.7.0
  compiler: clang
  + addons:
  + apt:
  + sources: ['ubuntu-toolchain-r-test']
  + packages: g++-7
  - os: linux
  env: LLVM_VERSION=3.7.1
  