Web Assembly Conversion Using Side Module

This project demonstrates how to compile a C function (addition) into WebAssembly using Emscripten's SIDE_MODULE method and invoke it from a Node.js script.

Steps

1. Clone the Repository

   git clone https://github.com/iamswethaa/wasm-side_module.git

2. Install Emscripten

• Clone the Emscripten SDK repository

  git clone https://github.com/emscripten-core/emsdk.git
  cd emsdk

• Install and activate the latest version

  ./emsdk install latest
  ./emsdk activate latest

• Set up the environment variables

  ./emsdk_env.sh

3. Compile C to WebAssembly

cd ..
emcc add.c -O3 -s WASM=1 -s SIDE_MODULE=1 -o add.wasm

• -O3 : Enables optimization for performance.

• -s WASM=1 : Specifies that the output should be in WebAssembly format.

• -s SIDE_MODULE=1 : Generates a standalone .wasm file without accompanying JavaScript glue code.

• -o add.wasm : Names the output file as add.wasm.

This command produces a add.wasm file, which is your compiled WebAssembly module.

4. Run the Script

node index.js