Emscriptenのインストール

http://kripken.github.io/emscripten-site/docs/getting_started/downloads.html

wget https://s3.amazonaws.com/mozilla-games/emscripten/releases/emsdk-portable.tar.gz
#expand it
cd emsdk-portable
./emsdk update
./emsdk install latest
./emsdk activate latest

.zshrc

export PATH=$HOME/emsdk_portable:$PATH
export PATH=$HOME/emsdk_portable/clang/e1.27.0_64bit:$PATH
export PATH=$HOME/emsdk_portable/node/0.10.18_64bit/bin:$PATH
export PATH=$HOME/emsdk_portable/emscripten/1.27.0:$PATH
export EMSCRIPTEN="$HOME/emsdk_portable/emscripten/1.27.0"