On Sep 14, 2010, at 22:27 , Eric R. wrote:

> I'm new to Ruby, so please forgive me if this seems a tad bit obvious =
:)
>=20
> While updating my gems so I could get Rails 3.0, I got many of the
> following errors (as in this example, it's sqlite):
>=20
> Updating sqlite3-ruby
> Building native extensions.  This could take a while...
> ERROR:  Error installing sqlite3-ruby:
>  ERROR: Failed to build gem native extension.
>=20
> /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.