[build] Move build_only_labels to top-level //:build_only group and use with subbuilds instead of universe

Universe is the wrong target to use for sub-builds, as it's
specifically a dependency of the product being compiled,
and sub-builds are really trying to do a build-only type of
operation.  We already have a build_only_labels mechanism,
although it's somewhat hidden.

This moves the build_only_labels mechanism into //BUILD.gn
and creates a top-level group for it to use that will play
nicely with the GN --root-pattern mechanism.

Change-Id: Idc980cd6060dd7fc68f48ec78c7d4633a7823a25
Reviewed-on: https://fuchsia-review.googlesource.com/c/fuchsia/+/1123882
Fuchsia-Auto-Submit: Aaron Wood <aaronwood@google.com>
Commit-Queue: Auto-Submit <auto-submit@fuchsia-infra.iam.gserviceaccount.com>
Reviewed-by: Hunter Freyer <hjfreyer@google.com>
3 files changed
tree: d43763e022b9d179fa8b8161de9529a3d4997cc8
  1. boards/
  2. build/
  3. bundles/
  4. docs/
  5. examples/
  6. infra/
  7. products/
  8. scripts/
  9. sdk/
  10. src/
  11. third_party/
  12. tools/
  13. zircon/
  14. .clang-format
  15. .clang-tidy
  16. .editorconfig
  17. .git-blame-ignore-revs
  18. .gitattributes
  19. .gitignore
  20. .gitmodules
  21. .gn
  22. .ignore
  23. analysis_options.yaml
  24. AUTHORS
  25. BUILD.gn
  26. CODE_OF_CONDUCT.md
  27. CONTRIBUTING.md
  28. fuchsia.code-workspace
  29. LICENSE
  30. OWNERS
  31. PATENTS
  32. pyproject.toml
  33. pyrightconfig.json
  34. README.md
  35. rustfmt.toml
  36. shac.star
  37. shac.textproto
README.md

Fuchsia

What is Fuchsia?

Fuchsia is an open source, general purpose operating system supporting modern 64-bit Intel and ARM processors.

We expect everyone interacting with our project to respect our code of conduct.

Read more about Fuchsia's principles.

How can I build and run Fuchsia?

See Getting Started.

Where can I learn more about Fuchsia?

See fuchsia.dev.