# MB - The Meta-Build wrapperMB is a simple wrapper intended to provide a uniform interface to eitherGYP or GN, such that users and bots can call one script and not need toworry about whether a given bot is meant to use GN or GYP.It supports two main functions:1. "gen" - the main `gyp_chromium` / `gn gen` invocation that generates the Ninja files needed for the build.2. "analyze" - the step that takes a list of modified files and a list of desired targets and reports which targets will need to be rebuilt.We also use MB as a forcing function to collect all of the different build configurations that we actually support for Chromium builds intoone place, in `//tools/mb/mb_config.pyl`.For more information, see:*[The User Guide](docs/user_guide.md)*[The Design Spec](docs/design_spec.md)