message: construction_worker: using libc++ with Clang
diff: @@ -51,7 +51,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-5.0']
  - packages: ['g++-6', 'clang-5.0']
  + packages: ['clang-5.0', 'libc++-dev', 'libc++abi-dev']
  after_success:
  - make clang_sanitize -j4
  @@ -119,7 +119,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.6']
  - packages: ['g++-6', 'clang-3.6']
  + packages: ['clang-3.6', 'libc++-dev', 'libc++abi-dev']
  coverity_scan:
  project:
  name: "nlohmann/json"
  @@ -207,7 +207,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.5']
  - packages: ['g++-6', 'clang-3.5']
  + packages: ['clang-3.5', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -215,7 +215,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.6']
  - packages: ['g++-6', 'clang-3.6']
  + packages: ['clang-3.6', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -223,7 +223,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-precise-3.7']
  - packages: ['g++-6', 'clang-3.7']
  + packages: ['clang-3.7', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -231,7 +231,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test']
  - packages: ['g++-6', 'clang-3.8']
  + packages: ['clang-3.8', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -239,7 +239,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test']
  - packages: ['g++-6', 'clang-3.9']
  + packages: ['clang-3.9', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -247,7 +247,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-4.0']
  - packages: ['g++-6', 'clang-4.0']
  + packages: ['clang-4.0', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -255,7 +255,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-5.0']
  - packages: ['g++-6', 'clang-5.0']
  + packages: ['clang-5.0', 'libc++-dev', 'libc++abi-dev']
  - os: linux
  compiler: clang
  @@ -265,7 +265,7 @@ matrix:
  addons:
  apt:
  sources: ['ubuntu-toolchain-r-test', 'llvm-toolchain-trusty-5.0']
  - packages: ['g++-6', 'clang-5.0']
  + packages: ['clang-5.0', 'libc++-dev', 'libc++abi-dev']
  ################
  # build script #
  