🔗 Rust + C Interoperability Demo

This is a demo project showcasing how to create a single executable using code written in two different languages: Rust and C.

The project demonstrates how Rust can call a C function using FFI (Foreign Function Interface), a powerful feature of Rust that enables seamless integration with low-level system libraries.

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📦 Build Instructions

Make sure you have Rust and Cargo installed:
👉 https://www.rust-lang.org/tools/install

📁 Project Structure

mix_language_project/
├── Cargo.toml       # Project metadata and dependencies
├── build.rs         # Compiles C code into a static library
├── sum.c            # C source file containing `sum` function
└── src/
    └── main.rs      # Rust main file calling C function

To build and run:

cargo build
cargo run

Working

First Cargo create libsum.a from the C sum file and store it in the target library. Then, build the Rust project and at linking time, add libsum.a to the final executable.