gecko-dev/build/build-clang/clang-linux64.json

{
    "stages": "3",
    "build_libcxx": true,
    "build_wasm": true,
    "build_type": "Release",
    "assertions": false,
    "python_path": "/usr/bin/python2.7",
    "gcc_dir": "{MOZ_FETCHES_DIR}/gcc",
    "cc": "{MOZ_FETCHES_DIR}/gcc/bin/gcc",
    "cxx": "{MOZ_FETCHES_DIR}/gcc/bin/g++",
    "as": "{MOZ_FETCHES_DIR}/gcc/bin/gcc",
    "patches": [
      "static-llvm-symbolizer.patch",
      "find_symbolizer_linux.patch",
      "rename_gcov_flush.patch",
      "android-mangling-error.patch"
    ]
}