From: Eric Hodel <drbrain@...7.net>
Date: 2009-09-01T08:06:05+09:00
Subject: Re: Updating gems for ruby 1.9

On Aug 29, 2009, at 11:02, Thomas Preymesser wrote:
>> Is there a different gem command for 1.8 and for 1.9?
>
> no.

yes*

* If your ruby 1.9 installation was configured with --program-suffix,  
this suffix will be used to determine the gem command's name.  For  
example ./configure --program-suffix=19 gives you ruby19 and gem19.   
You'll probably also want to set --format-executable in ~/.gemrc (see  
gem help env).