$NetBSD: patch-setup.rb,v 1.2 2020/01/14 14:40:42 taca Exp $

* Fix build problem on Ruby 2.2 and later.
* Remove duplicated line.

--- setup.rb.orig	2004-10-30 14:17:39.000000000 +0000
+++ setup.rb
@@ -256,7 +256,7 @@ class ConfigTable_class
 
 end
 
-c = ::Config::CONFIG
+c = ::RbConfig::CONFIG
 
 rubypath = c['bindir'] + '/' + c['ruby_install_name']
 
@@ -355,7 +355,6 @@ class ConfigTable_class   # open again
     'site-ruby-common' => 'siteruby',     # For backward compatibility
     'site-ruby'        => 'siterubyver',  # For backward compatibility
     'bin-dir'          => 'bindir',
-    'bin-dir'          => 'bindir',
     'rb-dir'           => 'rbdir',
     'so-dir'           => 'sodir',
     'data-dir'         => 'datadir',
@@ -1246,7 +1245,7 @@ class Installer
 
   def ruby_extentions(dir)
     Dir.open(dir) {|d|
-      ents = d.select {|fname| /\.#{::Config::CONFIG['DLEXT']}\z/ =~ fname }
+      ents = d.select {|fname| /\.#{::RbConfig::CONFIG['DLEXT']}\z/ =~ fname }
       if ents.empty?
         setup_rb_error "no ruby extention exists: 'ruby #{$0} setup' first"
       end