About

//build contains:

• Core GN templates and configuration
• Core Python build scripts

Since this directory is DEPS'ed in by some other repositories (webrtc, pdfium, v8, etc), it should be kept as self-contained as possible by not referring to files outside of it. Some exceptions exist (//testing, select//third_party subdirectories), but new dependencies tend to break these other projects, and so should be avoided.

Changes to//build should be landed in the Chromium repo. They will then be replicated to the stand-alonebuild repo by thegsubtreed tool. Note: You can find all directories already available through gsubtreed in thelist of all chromium repos.

Contents

• //build/config - Common templates via.gni files.
• //build/toolchain - GN toolchain definitions.
• Other .py files - Some are used by GN/Ninja. Some by gclient hooks, some are just random utilities.

Files referenced by//.gn:

• //build/BUILDCONFIG.gn - Included by allBUILD.gn files.
• //build/secondary - An overlay forBUILD.gn files. Enables addingBUILD.gn to directories that live in sub-repositories.
• //build_overrides - Refer to//build_overrides/README.md.

Docs

• Writing GN Templates
• Debugging Slow Builds
• Mac Hermetic Toolchains
• Android Build Documentation