libv8需要安装python2才能构建- Windows

Question

因此，我试图在我的Windows上安装libv8：

D:\projects\perfstats>gem install libv8
Fetching: libv8-3.16.14.1.gem (100%)
Temporarily enhancing PATH to include DevKit...
Building native extensions.  This could take a while...
ERROR:  Error installing libv8:
        ERROR: Failed to build gem native extension.

        D:/Ruby193/bin/ruby.exe extconf.rb
creating Makefile
The system cannot find the path specified.
The system cannot find the path specified.
The system cannot find the path specified.
D:/Ruby193/lib/ruby/gems/1.9.1/gems/libv8-3.16.14.1/ext/libv8/builder.rb:49:in `setup_python!': libv8 requires python 2 to be installed in order to build, but it is currently not available (RuntimeError)
        from D:/Ruby193/lib/ruby/gems/1.9.1/gems/libv8-3.16.14.1/ext/libv8/builder.rb:35:in `block in build_libv8!'
        from D:/Ruby193/lib/ruby/gems/1.9.1/gems/libv8-3.16.14.1/ext/libv8/builder.rb:34:in `chdir'
        from D:/Ruby193/lib/ruby/gems/1.9.1/gems/libv8-3.16.14.1/ext/libv8/builder.rb:34:in `build_libv8!'
        from D:/Ruby193/lib/ruby/gems/1.9.1/gems/libv8-3.16.14.1/ext/libv8/location.rb:24:in `install!'
        from extconf.rb:7:in `<main>'

我安装了python2.7并将其添加到路径中：

D:\projects\perfstats>python -V
Python 2.7.3

有什么办法解决这个问题吗？

Answer 1

有一些方法可以解决这个问题，试着运行：gem libv8 -v '3.16.14.1‘-- with v8

或者我们像这样在Gemfile中把它们分开

group :production do
 gem 'libv8', '~> 3.11.8.3'
 gem 'therubyracer', :platform => :ruby
end

然后运行bundle命令: bundle安装开发或包安装--不需要生产。

Answer 2

我在Windows上安装therubyracer时也遇到了同样的问题。

尝试安装GitHub包therubyracer并将v8.dll & v8preparser.dll复制到ruby\bin文件夹中。

这也将安装libv8 gem并解决您的问题。