emscripten的简易安装(Windows下)

1、分别下载一下软件
(1) MinGW+MinSys
(2) clang
(3) Python27（Portable版本）
(4) node.js
(5) emscripten
(6) FireFox最新版本

2、解压安装到同一个目录下，如下图所示


3、编写一个脚本，自动安装环境变量：install.bat

set EMSCRIPTEN_PATH=%~dp0emscripten
wmic ENVIRONMENT create name="EMSCRIPTEN",username="",VariableValue=%EMSCRIPTEN_PATH%
set LLVM_ROOT=%~dp0clang\bin
wmic ENVIRONMENT create name="LLVM",username="",VariableValue=%LLVM_ROOT%
set PYTHON_PATH=%~dp0Python27\python.exe
wmic ENVIRONMENT create name="PYTHON",username="",VariableValue=%PYTHON_PATH%
set MINGW_PATH=%~dp0MinGW\bin
set PYTHON_INSTALL_PATH=%~dp0Python27
wmic ENVIRONMENT where "name='PATH' and username=''" set VariableValue="%PATH%;%MINGW_PATH%;%PYTHON_INSTALL_PATH%;%LLVM_ROOT%"
set EM_TEMP_DIR=%~dp0MinGW\msys\1.0\tmp
wmic ENVIRONMENT create name="EM_TEMP_DIR",username="",VariableValue=%EM_TEMP_DIR%

4、修改MinSys的配置脚本，管理相应的环境变量
修改这个文件：MinGW\msys\1.0\home\Administrator\.emscripten
其中 Administrator 是你windows帐号的名字。
修改如下：

# this helps projects using emscripten find it
EMSCRIPTEN_ROOT = os.path.expanduser(os.getenv('EMSCRIPTEN') or 'D:\MinGW\msys\1.0\emscripten') # directory
LLVM_ROOT = os.path.expanduser(os.getenv('LLVM') or 'D:\MinGW\msys\1.0\clang\bin') # directory
PYTHON = os.path.expanduser(os.getenv('PYTHON') or 'D:\MinGW\msys\1.0\Python27\python.exe') # executable

# See below for notes on which JS engine(s) you need
NODE_JS = os.path.expanduser(os.getenv('NODE') or 'node') # executable
SPIDERMONKEY_ENGINE = [os.path.expanduser(os.getenv('SPIDERMONKEY') or 'js')] # executable
V8_ENGINE = os.path.expanduser(os.getenv('V8') or 'd8') # executable

JAVA = 'java' # executable
TEMP_DIR = os.path.expanduser(os.getenv('EM_TEMP_DIR') or 'c:\temp')