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dawn/dawn/8fd2d3a43bb57229c1c2e740deed528436a79f9e
commit
8fd2d3a43bb57229c1c2e740deed528436a79f9e
[log]
author
Ryan Harrison <rharrison@chromium.org>
Wed Jun 17 14:19:19 2026 -0700
committer
dawn-scoped@luci-project-accounts.iam.gserviceaccount.com <dawn-scoped@luci-project-accounts.iam.gserviceaccount.com>
Wed Jun 17 14:19:19 2026 -0700
tree
ea39c28ad56926d1652a0fe14e26e1a1fc62e574
parent
338c761d188d567015a1da8afbcf8c5cbde4dacb [diff]
[cmake] Handle cross compiling + protobufs

Upstream (chromium) recently changed the way that our version of
protobuf is built to generating some of the .cc/.h files from .protos
on the fly instead of having them checked in. This works 'fine' when
building with the same host/target, since the built protoc can be used
to generate the files during the build.

This falls over when cross compiling for a different architecture,
since the built protoc will not work on the host machine.

The standard fix for this is to allow the user to provide a host
protoc via PROTOC_EXECUTABLE and indicate that cross compiling is
occurring via CMAKE_CROSSCOMPILING, which is what this CL sets up.

Fixes: 524776852
Change-Id: I6bea23af19f40eed56354226160426ce984c4987
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/317655
Reviewed-by: dan sinclair <dsinclair@chromium.org>
Commit-Queue: Ryan Harrison <rharrison@chromium.org>
Reviewed-by: James Price <jrprice@google.com>
Auto-Submit: Ryan Harrison <rharrison@chromium.org>
1 file changed
tree: ea39c28ad56926d1652a0fe14e26e1a1fc62e574
  1. .github/
  2. .vscode/
  3. agents/
  4. build_overrides/
  5. docs/
  6. generator/
  7. include/
  8. infra/
  9. scripts/
  10. src/
  11. test/
  12. third_party/
  13. tools/
  14. webgpu-cts/
  15. build
  16. buildtools
  17. testing
  18. .bazelrc
  19. .bazelversion
  20. .clang-format
  21. .clang-format-ignore
  22. .clang-tidy
  23. .git-blame-ignore-revs
  24. .gitattributes
  25. .gitignore
  26. .gitmodules
  27. .gn
  28. .style.yapf
  29. .vpython3
  30. AUTHORS
  31. BUILD.bazel
  32. BUILD.gn
  33. CMakeLists.txt
  34. CMakeSettings.json
  35. CODE_OF_CONDUCT.md
  36. codereview.settings
  37. CONTRIBUTING.md
  38. CPPLINT.cfg
  39. DEPS
  40. DIR_METADATA
  41. go.mod
  42. go.sum
  43. go_presubmit_support.py
  44. LICENSE
  45. MODULE.bazel
  46. MODULE.bazel.lock
  47. OWNERS
  48. PRESUBMIT.py
  49. PRESUBMIT_test.py
  50. README.chromium
  51. README.md
  52. unsafe_buffers_paths.txt
  53. WATCHLISTS
  54. WORKSPACE.bazel
README.md

Build Status Matrix Space

Dawn, a WebGPU implementation

Dawn is an open-source and cross-platform implementation of the WebGPU standard. More precisely it implements webgpu.h that is a one-to-one mapping with the WebGPU IDL. Dawn is meant to be integrated as part of a larger system and is the underlying implementation of WebGPU in Chromium.

Dawn provides several WebGPU building blocks:

  • WebGPU C/C++ headers that applications and other building blocks use.
    • The webgpu.h version that Dawn implements.
    • A C++ wrapper for the webgpu.h.
  • A “native” implementation of WebGPU using platforms' GPU APIs: D3D12, Metal, Vulkan and OpenGL. See per API support for more details.
  • A client-server implementation of WebGPU for applications that are in a sandbox without access to native drivers
  • Tint is a compiler for the WebGPU Shader Language (WGSL) that can be used in standalone to convert shaders from and to WGSL.

Helpful links:

Documentation table of content

Developer documentation:

User documentation: (TODO, figure out what overlaps with the webgpu.h docs)

License

BSD 3-Clause License, please see LICENSE.

Disclaimer

This is not an officially supported Google product.