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我知道我以前在相同的硬件/操作系统上工作过，但今天我卡住了。在Win7x64上安装unf_ext的问题
为1.9.3，我得到：
$ gem install unf_ext --version=0.0.5
Successfully installed unf_ext-0.0.5-x86-mingw32
Installing ri documentation for unf_ext-0.0.5-x86-mingw32
1 gem installed
[email protected] ~
$ ruby -e "require 'unf_ext'"
C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:45:in `require': cannot load such file -- unf_ext.so (LoadError)
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:45:in `require'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/unf_ext-0.0.6-x86-mingw32/lib/unf_ext.rb:4:in `rescue in <top (required)>'
from C:/Ruby193/lib/ruby/gems/1.9.1/gems/unf_ext-0.0.6-x86-mingw32/lib/unf_ext.rb:1:in `<top (required)>'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:110:in `require'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:110:in `rescue in require'
from C:/Ruby193/lib/ruby/site_ruby/1.9.1/rubygems/core_ext/kernel_require.rb:35:in `require'
from -e:1:in `<main>'
并为2.0.0，我得到：
$ gem install unf_ext
unable to convert "\x90" from ASCII-8BIT to UTF-8 for lib/unf_ext.so, skipping
这与rubyinstaller.org红宝石加的devkit的建议版本。
我也对做了两个。
任何人都可以想到我错过了什么吗？