WebAssemblyNodeJSSample

Compile a simple C code and execute in Node.js

Preliminary

On my machine, I have emcc and Node.js installed as a preparation of this project. I list the version information for your reference:

• Node.js v8.9.1
• emcc 1.38.11

Compile

To compile the source code, we should firstly set the environment for emsdk:

$ source path/to/emsdk/emsdk_env.sh

Thus, makefile could find the toolchain. Then, we run:

$ make

The resultant files are addTwo.js and addTwo.wasm.

Execution

In node, we firstly load the js file and call the addTwo function, it's to be noted that exported functions' names begin with an underscore:

> w=require('./addTwo.js')
> w._addTwo(12,222)
234