tree 3db8d4650d9224ae80385077930fcbcd27b340ce
parent 9cb2d6887ce57db4281d47e973c3564b1588d03a
author danakj <danakj@chromium.org> 1698773904 +0000
committer Pdfium LUCI CQ <pdfium-scoped@luci-project-accounts.iam.gserviceaccount.com> 1698773904 +0000

Add support for the Rust toolchain

To enable Rust build targets in standalone pdfium:
- Add `checkout_rust: True` to the gclient `custom_vars` section. As
  it defaults to false:
    "custom_vars": {
      "checkout_rust": True,
    }
- Set `enable_rust = true` in GN args, as it also defaults to false.
- Run gclient sync

Then building `rust_build_tests` will build test targets in
//build/rust/tests, which rely on and verify the functioning of
the Rust toolchain.

Make new rust targets by using the GN templates in //build/rust.

In the chromium build, Rust build targets that use the templates
from //build/rust will just work.

When rolling `tools/clang` and `build`, also roll `tools/rust` and
`testing/scripts/rust`.

Bug: chromium:1494118
Change-Id: I25fadcdee6223293382e623101b8489b75419791
Reviewed-on: https://pdfium-review.googlesource.com/c/pdfium/+/113230
Commit-Queue: danakj <danakj@chromium.org>
Reviewed-by: Lei Zhang <thestig@chromium.org>