# Third-party dependencies

## yyjson

The salvage metadata backend uses the bundled yyjson submodule for JSON
read/write support.  The submodule is required and is linked statically into the
mars-nwe server targets that use salvage metadata.

Setup:

```sh
git submodule update --init --recursive third_party/yyjson
```

CMake expects `third_party/yyjson/CMakeLists.txt` to exist.  Reader and writer
support stay enabled; yyjson tests, fuzzer, misc tools, docs, install targets,
JSON5/non-standard support, utilities and incremental reader support are disabled
for the mars-nwe build.