Bun FFI Experiment

A minimal example of calling C++ functions from Bun using FFI.

Structure

• cpp/cpp_math.cpp - C++ source with a simple add() function
• build_cpp.sh - Compiles C++ to a shared library
• bun/index.js - Bun script that calls the C++ function via FFI
• build_bun.sh - Compiles the Bun script into a standalone executable, including the C++ shared library

Usage

1. Build the C++ library:

./build_cpp.sh

2. Run the Bun script:

bun run bun/index.js

3. Build the Bun executable:

./build_bun.sh

Run the Bun executable:

./dist/bun_binary

Expected output:

C++ Add: 10 + 20 = 30
C++ Multiply: 10 * 20 = 200
JS Add: 10 + 20 = 30
JS Multiply: 10 * 20 = 200