Web Assembly Conversion Using Modularize

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

Steps

1. Clone the Repository

   git clone https://github.com/iamswethaa/wasm-modularize.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 sub.c -s WASM=1 -s MODULARIZE=1 -s ENVIRONMENT=node -s EXPORTED_FUNCTIONS='["_sub"]' -s EXPORTED_RUNTIME_METHODS='["ccall"]' -o sub.js

   This command produce two files :

   • sub.js - which is your JavScript Glue Code
   • sub.wasm - which is your compiled WebAssembly module

4. Run the Script

   node main.js