(Preface, this issue is for the unreleased OS X Mavericks, so understand if it's not fixable now, just wanted to bring it up.)
I'm unable install the 0.9.1 thrift gem on my GM OS X Mavericks system with ruby 1.9.3-p448. I get the error `extconf.rb:25: Use RbConfig instead of obsolete and deprecated Config.` along with some strlcopy errors.
Strack trace is at (https://gist.github.com/chrismanderson/6834809)
Oddly, I CAN install the 0.9.1 gem with both 2.0.0-p247 and ree-1.8.7-2011.12. I also tried 1.9.3-p194 and p429 and got the same error.