Dependencies

A vendored dep is provided by the project and built as part of building VW. A system dep is externally provided by the OS or a package manager.

Dependency	Available as vendored?	Can be system?	Optional?
boost-math	Yes, default	Yes, -DVW_BOOST_MATH_SYS_DEP=On	No
zlib	Yes, -DVW_ZLIB_SYS_DEP=Off	Yes, default	No
rapidjson	Yes, default	Yes, -DRAPIDJSON_SYS_DEP=On in CMake	No
flatbuffers	No	Yes, default	Yes, off by default. -DBUILD_FLATBUFFERS=On in CMake to enable
spdlog	Yes, default	Yes, -DFMT_SYS_DEP=On in CMake	No
fmt	Yes, default	Yes, -DSPDLOG_SYS_DEP=On in CMake	No
string-view-lite	Yes, default	No	No
Eigen	Yes, default	No	No