| commit | 656d7169a23e08ade7d78010676c091c4d11a0ea | [log] [tgz] |
|---|---|---|
| author | Devin Jeanpierre <jeanpierreda@google.com> | Tue Aug 20 13:42:33 2024 -0700 |
| committer | Copybara-Service <copybara-worker@google.com> | Tue Aug 20 13:43:30 2024 -0700 |
| tree | 9a38bfb04d65abdd41e569e89e0c1714e8eeaba6 | |
| parent | 5edc74a3186510aac204e2e4839ae7b0d3b34dcc [diff] |
Add googletest to public bazel build and regenerate the lockfile. This doesn't fix the CI, because googletest hasn't released a new version with `#[gtest]` yet. But that will be as simple as just hand-editing the lock file when that's out. (Yes, I am an incorrigible hack.) PiperOrigin-RevId: 665508932 Change-Id: Ia2c693f5b4e489e6aa8765155d3db157d5536def
NOTE: Crubit currently expects deep integration with the build system, and is difficult to deploy to environments dissimilar to Google's monorepo. We do not have our tooling set up to accept external contributions at this time.
Crubit is a bidirectional bindings generator for C++ and Rust, with the goal of integrating the C++ and Rust ecosystems.
Support for calling FFI-friendly C++ from Rust is in progress.
Support for calling Rust from C++ will arrive in 2024H2.
Consider the following C++ function:
extern "C" bool IsGreater(int lhs, int rhs);
This function, if present in a header file which is processed by Crubit, becomes callable from Rust as if it were defined as:
pub fn IsGreater(lhs: ffi::c_int, rhs: ffi::c_int) -> bool {...}
Note: There are some temporary restrictions on the API shape. For example, functions that are not extern "C", or that accept a type like std::string, can't be called from Rust directly via Crubit. These restrictions will be relaxed over time.
Here are some resources for getting started with Crubit:
Rust Bindings for C++ Libraries is a detailed walkthrough on how to use C++ from Rust using Crubit.
The examples/cpp/ directory has copy-pastable examples of calling C++ from Rust, together with snapshots of what the generated Rust interface looks like.
$ 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
$ 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