https://zhuanlan.zhihu.com/p/158586853

 

https://developer.mozilla.org/en-US/docs/WebAssembly/C_to_wasm

 

git clone https://hub.fastgit.org/emscripten-core/emsdk.git

 

# Fetch the latest version of the emsdk (not needed the first time you clone)
git pull

# Download and install the latest SDK tools.
./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

Note

On Windows, run emsdk instead of ./emsdk, and emsdk_env.bat instead of source ./emsdk_env.sh.

 

emcc main.cpp -o hello.js -s STANDALONE_WASM