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在我的旧应用上运行捆绑安装会出现以下错误：

安装pg（0.12.2）

Gem :: Installer :: ExtensionBuildError：错误：无法构建gem原生扩展。
   c:/Users/user/jruby-1.7.4/bin/jruby.exe extconf.rb
NotImplementedError：未启用C扩展支持。将-Xcext.enabled = true传递给JRuby＆gt;或设置JRUBY_OPTS或修改.jrubyrc以启用。

（root）at c：/Users/user/jruby-1.7.4/lib/ruby/shared/mkmf.rb:8    在org / jruby / RubyKernel.java中要求：1054     （root）at c：/Users/user/jruby-1.7.4/lib/ruby/shared/rubygems/custom_require.r   B：1     （root）at extconf.rb：2

Gem文件将保留在c：/Users/user/jruby-1.7.4/lib/ruby/gems/share中   d / gems / pg-0.12.2进行检查。   结果记录到c：/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/pg-0.12.2/   EXT / gem_make.out   安装pg（0.12.2）时发生错误，Bundler无法继续。   在捆绑之前确保gem install pg -v '0.12.2'成功。

请告知。

我尝试按照此处的文档安装Neo4j：https://github.com/andreasronge/neo4j/wiki/Neo4j%3A%3ARails-Introduction 我试过跑步 rails new myapp -m http://andreasronge.github.com/neo4j/rails.rb -O 但它给了我以下错误：

Errno::EINVAL: Invalid argument - =C:
            replace at org/jruby/RubyHash.java:1791
  with_original_env at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/bundl
er-1.3.5/lib/bundler.rb:207
     with_clean_env at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/bundl
er-1.3.5/lib/bundler.rb:211
     bundle_command at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/railt
ies-4.0.0/lib/rails/generators/app_base.rb:271
         run_bundle at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/railt
ies-4.0.0/lib/rails/generators/app_base.rb:277
         run_bundle at (eval):1
           __send__ at org/jruby/RubyBasicObject.java:1703
                run at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/thor-
0.18.1/lib/thor/command.rb:27
     invoke_command at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/thor-
0.18.1/lib/thor/invocation.rb:120
         invoke_all at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/thor-
0.18.1/lib/thor/invocation.rb:127
               each at org/jruby/RubyHash.java:1332
                map at org/jruby/RubyEnumerable.java:713
         invoke_all at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/thor-
0.18.1/lib/thor/invocation.rb:127
           dispatch at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/thor-
0.18.1/lib/thor/group.rb:233
              start at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/thor-
0.18.1/lib/thor/base.rb:439
             (root) at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/railt
ies-4.0.0/lib/rails/commands/application.rb:43
            require at org/jruby/RubyKernel.java:1054
             (root) at c:/Users/user/jruby-1.7.4/lib/ruby/shared/rubygems/custom
_require.rb:1
            require at c:/Users/user/jruby-1.7.4/lib/ruby/shared/rubygems/custom
_require.rb:55
            require at org/jruby/RubyKernel.java:1054
             (root) at c:/Users/user/jruby-1.7.4/lib/ruby/gems/shared/gems/railt
ies-4.0.0/lib/rails/cli.rb:15
             (root) at c:/Users/user/jruby-1.7.4/lib/ruby/shared/rubygems/custom
_require.rb:1
               load at org/jruby/RubyKernel.java:1073
             (root) at c:/Users/user/jruby-1.7.4/bin/rails:23

更重要的是，我之前构建的Rails 3.2.1应用程序现在在运行rails服务器时不起作用。可能是那个

gem install rails

命令打破了我的旧应用程序？

提前致谢！

Rails - gem安装rails问题，安装Neo4j

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