build:
  clang-libcxx:
    cmake-args:
      - "-DCMAKE_C_COMPILER=clang"
      - "-DCMAKE_CXX_COMPILER=clang++"
      - "-DCMAKE_CXX_FLAGS='-stdlib=libc++ -D_LIBCPP_ENABLE_THREAD_SAFETY_ANNOTATIONS'"
      - "-DFORCE_BUILD_VENDOR_PKG=ON"
      - "--no-warn-unused-cli"