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Dart + Rust FFI

Overview

This project shows how to integrate Dart with Rust using the Foreign Function Interface (FFI). The Rust code has to be compiled for the x86_64 architecture to ensure compatibility with the Globe runtime.

Bootstrap

Initialize the project using the command below

$ globe create -t ffi_hello_world

Project Structure

├── dart_project/ # Dart project source code
│ ├── bin/
│ │ └── server.dart # Entry point of the Dart application
│ ├── pubspec.yaml # Dart package configuration
├── native_hello/ # Rust source code for the library
│ ├── src/
│ │ └── lib.rs # Rust FFI implementation
│ ├── Cargo.toml # Rust package configuration
│ └── target/ # Directory for compiled Rust binaries
└── globe.yaml # Configuration for Globe

Compiling the Rust Library

The Rust library needs to be compiled for the x86_64 architecture. We recommend using the cross tool for this purpose, which simplifies cross-compilation.

  1. Install cross
cargo install cross
  1. Compile for x86_64-unknown-linux-gnu

Navigate to the native_hello directory and run:

cross build --release --target x86_64-unknown-linux-gnu

The compiled library will be located in:

native_hello/target/x86_64-unknown-linux-gnu/release/libnative_hello.so
  1. Add the compiled library to the Dart project:
assets:
  - native_hello/target/x86_64-unknown-linux-gnu/release/libnative_hello.so:static/libnative_hello.so

Deployment

globe deploy