WebAssembly

安装

Linux

安装依赖

apt-get update
apt-get -y install git build-essential python pip

获取 emsdk

# Get the emsdk repo
git clone https://github.com/emscripten-core/emsdk.git

安装配置 Emscripten

# Enter that directory
cd emsdk

# Fetch the latest registry of available tools.
# ./emsdk update

# Download and install the latest SDK tools. Need install Python first. 
./emsdk install latest

# Make the "latest" SDK "active" for the current user. (writes ~/.emscripten file)
./emsdk activate latest

# Activate PATH and other environment variables in the current terminal
source ./emsdk_env.sh

# Verifying Emscripten
emcc -v

创建 hello.c

#include <stdio.h>

int main() {
    printf("hello, world!\n");
    return 0;
}

编译

# 生成 a.out.js, a.out.wasm
emcc hello.c

# 生成 hello.js
emcc hello.c -o hello.js

# 生成 hello.html 和 hello.js
emcc hello.c -o hello.html

运行
```
node a.out.js
```