1 files changed, 38 insertions, 0 deletions
diff --git a/lib/rbconfig/obsolete.rb b/lib/rbconfig/obsolete.rb
new file mode 100644
index 0000000000..8669186083
--- /dev/null
+++ b/lib/rbconfig/obsolete.rb
@@ -0,0 +1,38 @@
+module ::RbConfig
+  module Obsolete
+  end
+  class << Obsolete
+    def _warn_
+      loc, = caller_locations(2, 1)
+      loc = "#{loc.to_s}: " if loc
+      warn "#{loc}Use RbConfig instead of obsolete and deprecated Config."
+      self
+    end
+
+    def const_missing(name)
+      _warn_
+      ::RbConfig.const_get(name)
+    end
+
+    def method_missing(*args, &block)
+      _warn_
+      rbconfig = ::RbConfig
+      result = rbconfig.__send__(*args, &block)
+      result = rbconfig if rbconfig.equal?(result)
+      result
+    end
+
+    def respond_to_missing?(*args, &block)
+      _warn_
+      ::RbConfig.respond_to_missing?(*args, &block)
+    end
+  end
+end
+
+::Config = ::RbConfig::Obsolete._warn_
+=begin
+def Object.const_missing(name)
+  return super unless name == :Config
+  ::RbConfig::Obsolete._warn_
+end
+=end