gecko-dev/build/build-clang/clang-win64.json

{
    "stages": "3",
    "build_libcxx": false,
    "build_type": "Release",
    "assertions": false,
    "python_path": "c:/mozilla-build/python/python.exe",
    "cc": "cl.exe",
    "cxx": "cl.exe",
    "ml": "ml64.exe",
    "patches": [
      "unpoison-thread-stacks.patch",
      "downgrade-mangling-error.patch",
      "r372020-r372182-profiler-linkage.patch",
      "revert-r359260-due-to-bug41817.patch",
      "loosen-msvc-detection.patch"
    ]
}