1 files changed, 11 insertions, 1 deletions
diff --git a/lib/rubygems.rb b/lib/rubygems.rb
index f63a9b77af..7ad35c0c4c 100644
--- a/lib/rubygems.rb
+++ b/lib/rubygems.rb
@@ -8,7 +8,7 @@
 require 'rbconfig'
 
 module Gem
-  VERSION = '2.2.0.preview.1'
+  VERSION = '2.2.0'
 end
 
 # Must be first since it unloads the prelude from 1.9.2
@@ -139,6 +139,7 @@ module Gem
     build_info
     cache
     doc
+    extensions
     gems
     specifications
   ]
@@ -158,6 +159,7 @@ module Gem
   @path_to_default_spec_map = {}
   @platforms = []
   @ruby = nil
+  @ruby_api_version = nil
   @sources = nil
 
   @post_build_hooks     ||= []
@@ -823,6 +825,14 @@ module Gem
   end
 
   ##
+  # Returns a String containing the API compatibility version of Ruby
+
+  def self.ruby_api_version
+    @ruby_api_version ||=
+      "#{ConfigMap[:MAJOR]}.#{ConfigMap[:MINOR]}.#{ConfigMap[:TEENY]}"
+  end
+
+  ##
   # Returns the latest release-version specification for the gem +name+.
 
   def self.latest_spec_for name