Look in the right place for ruby headers, and silence the warnings about

the use of the Config module.

This is an in-house patch, and has not been submitted upstream, since the

Config->RbConfig change has already been made in a newer version, and the

remainder of the changes are Solaris-specific.

--- graphviz-2.28.0/config/config_ruby.rb	Fri Feb 18 13:25:56 2011

+++ graphviz-2.28.0/config/config_ruby.rb	Tue Jul  1 14:45:16 2014

@@ -1,16 +1,16 @@

 require 'rbconfig'

-CONFIG = Config::MAKEFILE_CONFIG

+CONFIG = RbConfig::MAKEFILE_CONFIG

 case ARGV[0]

 when "INCLUDES"

-    puts Config::expand(CONFIG["archdir"])

+    puts "#{RbConfig::expand(CONFIG['rubyhdrdir'])} -I#{RbConfig::expand(CONFIG['rubyhdrdir'])}/#{RbConfig::expand(CONFIG['arch'])}"

 when "lib"

-    puts Config::expand(CONFIG["libdir"])

+    puts RbConfig::expand(CONFIG["libdir"])

 when "archsitelib"

-    puts Config::expand(CONFIG["sitearchdir"])

+    puts RbConfig::expand(CONFIG["vendorarchdir"])

 when "sitelib"

-    puts Config::expand(CONFIG["sitedir"])

+    puts RbConfig::expand(CONFIG["vendordir"])

 end