| # MB - The Meta-Build wrapper |
| |
| MB is a simple wrapper around the GN build tool. |
| |
| It was originally written as part of the GYP->GN migration, in order to |
| provide a uniform interface to either GYP or GN, such that users and bots |
| can call one script and not need to worry about whether a given bot was |
| meant to use GN or GYP. |
| |
| It eventually grew additional functionality and is now still used even |
| though everything is GN-only. |
| |
| It supports two main functions: |
| |
| 1. "gen" - the main `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 into |
| one 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) |
