From: "Eric R." <erafaloff@...>
Date: 2010-09-16T08:00:23+09:00
Subject: Re: Errors while updating gems...

Ryan Davis wrote:
> On Sep 14, 2010, at 22:27 , Eric R. wrote:
> 
>> /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/bin/ruby
>> extconf.rb
>> mkmf.rb can't find header files for ruby at
>> /System/Library/Frameworks/Ruby.framework/Versions/1.8/usr/lib/ruby/ruby.h
> 
> Quick preliminary: do you have apple's developer tools installed? They 
> come free with your machine ... usually on the Extras DVD. You can also 
> download it (big 1 gig download) for free from developer.apple.com.

Good preliminary. I installed Apple's developer tools and problem 
solved!

You can now close this ticket ;)
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