build: use a toolchain different from prebuilts

This change improves the project build scalability by:
- Providing the clang toolchain path through the PATH environment
variable before invoking make. It means there is no longer a strict
dependency to the toolchain stored in prebuilts. The latter is still
required/used in context of the CI.
- Updating prebuilts tree hash to provide tools required by Arm host
native builds.
- ninja/gn tools path can be provided through NINJA and GN variables on
the make command line (no change). dtc tool is found from PATH.
It can be specified to point to the default prebuilt binary.

Change-Id: Iefb14564554f7d907751ba82db6884fe7fa5c50c
Signed-off-by: Olivier Deprez <olivier.deprez@arm.com>
13 files changed
tree: d871d0435cfdc8ac9e0e7e28653c89a16e65630f
  1. .vscode/
  2. build/
  3. docs/
  4. driver/
  5. inc/
  6. kokoro/
  7. project/
  8. src/
  9. test/
  10. third_party/
  11. vmlib/
  12. .clang-format
  13. .clang-tidy
  14. .gitignore
  15. .gitmodules
  16. .gn
  17. AUTHORS
  18. BUILD.gn
  19. CONTRIBUTING.md
  20. dco.txt
  21. LICENSE
  22. Makefile
  23. navbar.md
  24. README.md
README.md

Hafnium

Hafnium is a hypervisor, initially supporting aarch64 (64-bit Armv8 CPUs).

Get in touch and keep up-to-date at hafnium@lists.trustedfirmware.org. See feature requests and bugs on our bug dashboard.

Getting started

To jump in and build Hafnium, follow the getting started instructions.

If you want to contribute to the project, see details of how we accept contributions.

Documentation

More documentation is available on: