Few more fixes to the Ruby installation.

-) properly depending on libraries.
-) adding an independent 'loader' class to use instead of require 'grpc/grpc'.
diff --git a/src/ruby/ext/grpc/extconf.rb b/src/ruby/ext/grpc/extconf.rb
index 6054648..3e01820 100644
--- a/src/ruby/ext/grpc/extconf.rb
+++ b/src/ruby/ext/grpc/extconf.rb
@@ -90,7 +90,7 @@
   ENV['BUILDDIR'] = output_dir
 
   puts 'Building internal gRPC into ' + grpc_lib_dir
-  system("make -j -C #{grpc_root} static_c CONFIG=#{grpc_config}")
+  system("make -j -C #{grpc_root} #{grpc_lib_dir}/libgpr.a #{grpc_lib_dir}/libgrpc.a CONFIG=#{grpc_config}")
   exit 1 unless $? == 0
 end
 
diff --git a/src/ruby/lib/grpc.rb b/src/ruby/lib/grpc.rb
index 7890e17..8512856 100644
--- a/src/ruby/lib/grpc.rb
+++ b/src/ruby/lib/grpc.rb
@@ -32,11 +32,7 @@
   ENV['GRPC_DEFAULT_SSL_ROOTS_FILE_PATH'] = ssl_roots_path
 end
 
-begin
-  require "grpc/#{RUBY_VERSION.sub(/\.\d$/, '')}/grpc"
-rescue LoadError
-  require 'grpc/grpc'
-end
+require 'grpc/loader'
 
 require 'grpc/errors'
 require 'grpc/logconfig'
diff --git a/src/ruby/lib/grpc/generic/bidi_call.rb b/src/ruby/lib/grpc/generic/bidi_call.rb
index 6b9b785..b907393 100644
--- a/src/ruby/lib/grpc/generic/bidi_call.rb
+++ b/src/ruby/lib/grpc/generic/bidi_call.rb
@@ -28,7 +28,7 @@
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
 require 'forwardable'
-require 'grpc/grpc'
+require 'grpc/loader'
 
 # GRPC contains the General RPC module.
 module GRPC
diff --git a/src/ruby/lib/grpc/generic/rpc_desc.rb b/src/ruby/lib/grpc/generic/rpc_desc.rb
index dd90d8d..5dfb5c9 100644
--- a/src/ruby/lib/grpc/generic/rpc_desc.rb
+++ b/src/ruby/lib/grpc/generic/rpc_desc.rb
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require 'grpc/grpc'
+require 'grpc/loader'
 
 # GRPC contains the General RPC module.
 module GRPC
diff --git a/src/ruby/lib/grpc/generic/rpc_server.rb b/src/ruby/lib/grpc/generic/rpc_server.rb
index 410156f..2249056 100644
--- a/src/ruby/lib/grpc/generic/rpc_server.rb
+++ b/src/ruby/lib/grpc/generic/rpc_server.rb
@@ -27,7 +27,7 @@
 # (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 # OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 
-require 'grpc/grpc'
+require 'grpc/loader'
 require 'grpc/generic/active_call'
 require 'grpc/generic/service'
 require 'thread'
diff --git a/src/ruby/lib/grpc/loader.rb b/src/ruby/lib/grpc/loader.rb
new file mode 100644
index 0000000..9e04908
--- /dev/null
+++ b/src/ruby/lib/grpc/loader.rb
@@ -0,0 +1,34 @@
+# Copyright 2015-2016, Google Inc.
+# All rights reserved.
+#
+# Redistribution and use in source and binary forms, with or without
+# modification, are permitted provided that the following conditions are
+# met:
+#
+#     * Redistributions of source code must retain the above copyright
+# notice, this list of conditions and the following disclaimer.
+#     * Redistributions in binary form must reproduce the above
+# copyright notice, this list of conditions and the following disclaimer
+# in the documentation and/or other materials provided with the
+# distribution.
+#     * Neither the name of Google Inc. nor the names of its
+# contributors may be used to endorse or promote products derived from
+# this software without specific prior written permission.
+#
+# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+# "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+# LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+# A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+# OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+# SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+# LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+# DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+# THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+# (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+# OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+begin
+  require "grpc/#{RUBY_VERSION.sub(/\.\d$/, '')}/grpc"
+rescue LoadError
+  require 'grpc/grpc'
+end