From: Eric Hodel <drbrain@...7.net>
Date: 2009-06-03T08:03:23+09:00
Subject: Re: Error While Install Gem

On Jun 2, 2009, at 15:52, Nabs Kahn wrote:
> Eric Hodel wrote:
>> On Jun 2, 2009, at 12:21, Nabs Kahn wrote:
>>
>>> I am trying to install Mechanize on a WinXP machine, and I am  
>>> getting
>>> this error:
>>>
>>> ERROR: Failed to build gem native extension
>>>
>>> ruby extconf.rb install mechanize
>>> extconf.rb:3:in ``': No such file or directory - uname -p
>>> (Errno::ENOENT) from extconf.rb:3
>>
>> What was the full error?
>
> C:\Documents and Settings\Nabs>gem install mechanize
> Install required dependency nokogiri? [Yn]  y
> Select which gem to install for your platform (i386-mswin32)
> 1. nokogiri 1.3.0 (x86-mingw32)
> 2. nokogiri 1.3.0 (x86-mswin32)
> 3. nokogiri 1.3.0 (java)
> 4. nokogiri 1.3.0 (ruby)
> 5. Skip this gem
> 6. Cancel installation
>> 2

I think this went away with RubyGems 0.9.5

> Install required dependency racc? [Yn]  y

As did this.

> Building native extensions.  This could take a while...
> ERROR:  While executing gem ... (Gem::Installer::ExtensionBuildError)
>    ERROR: Failed to build gem native extension.
>
> ruby extconf.rb install mechanize
> extconf.rb:3:in ``': No such file or directory - uname -p
> (Errno::ENOENT)
>        from extconf.rb:3
>
>
> Gem files will remain installed in
> c:/ruby/lib/ruby/gems/1.8/gems/racc-1.4.6 for
> inspection.
> Results logged to
> c:/ruby/lib/ruby/gems/1.8/gems/racc-1.4.6/ext/racc/cparse/gem_
> make.out

I suspect that either your ruby or your RubyGems versions are too old  
and you should upgrade.  Currently RubyGems is at 1.3.4

What do:

ruby -v

and

gem env

say?