Introduce a Bazel rule named `cc_bindings_from_rust`.

This is a small, incremental improvement over directly using `genrule`
in `cc_bindings_from_rs/test/functions/BUILD`:

1. It avoids having to redundantly mention "function.rs" twice: once as
   `srcs` of a `rust_library` rule, and once as `srcs` of `genrule`.

2. It lays the groundwork for working later on passing the actual
   rustc cmdline arguments to the `cc_bindings_from_rs` library
   (rather than hardcoding `--crate-type=lib`, `--codegen=panic=abort`,
   etc which for now happens before and after this CL).
   This is the main motivation for this CL - this future work is
   needed to unblock b/254097223.

3. It prevents _some_ duplication in the future - when introducing more
   end-to-end tests (i.e. golden tests) we can reuse the new rule
   (instead of duplicating the `genrule`).

PiperOrigin-RevId: 487261849
3 files changed
tree: 2be356aa501081cb0ba487d0758af799b36fcce2
  1. .bazelci/
  2. bazel/
  3. cc_bindings_from_rs/
  4. cc_import/
  5. cc_template/
  6. common/
  7. docs/
  8. lifetime_analysis/
  9. lifetime_annotations/
  10. migrator/
  11. nullability_verification/
  12. rs_bindings_from_cc/
  13. .bazelrc
  14. .gitignore
  15. BUILD
  16. Cargo.Bazel.lock
  17. CODE_OF_CONDUCT
  18. CONTRIBUTING
  19. LICENSE
  20. README.md
  21. WORKSPACE
README.md

Crubit: C++/Rust Bidirectional Interop Tool

Build status

Extremely experimental interop tooling for C++ and Rust.

Please don‘t use, this is an experiment and we don’t yet know where will it take us. There will be breaking changes without warning. Unfortunately, we can't take contributions at this point.

Building Crubit

$ apt install clang lld bazel
$ git clone git@github.com:google/crubit.git
$ cd crubit
$ bazel build --linkopt=-fuse-ld=/usr/bin/ld.lld //rs_bindings_from_cc:rs_bindings_from_cc_impl

Using a prebuilt LLVM tree

$ git clone https://github.com/llvm/llvm-project
$ cd llvm-project
$ CC=clang CXX=clang++ cmake -S llvm -B build -DLLVM_ENABLE_PROJECTS='clang' -DCMAKE_BUILD_TYPE=Release -DCMAKE_INSTALL_PREFIX=install
$ cmake --build build -j
$ # wait...
$ cmake --install build
$ cd ../crubit
$ LLVM_INSTALL_PATH=../llvm-project/install bazel build //rs_bindings_from_cc:rs_bindings_from_cc_impl