diff --git a/ext/tk/lib/tkextlib/pkg_checker.rb b/ext/tk/lib/tkextlib/pkg_checker.rb
index 813273e65b..5ebf675189 100755
--- a/ext/tk/lib/tkextlib/pkg_checker.rb
+++ b/ext/tk/lib/tkextlib/pkg_checker.rb
@@ -10,15 +10,58 @@ TkRoot.new.withdraw  # hide root window
 
 name = File.basename(__FILE__)
 
+add_path = false
+verbose  = false
+
+def help_msg
+  print "Usage: #{$0} [-l] [-v] [-h] [--] [dir]\n"
+  print "\tIf dir is omitted, check the directry that this command exists.\n"
+  print "\tAvailable options are \n"
+  print "\t  -l : Add dir to $LOAD_PATH\n"
+  print "\t       (If dir == '<parent>/tkextlib', add <parent> also.)\n"
+  print "\t  -v : Verbose mode (show reason of fail)\n"
+  print "\t  -h : Show this message\n"
+  print "\t  -- : End of options\n"
+end
+
+while(ARGV[0] && ARGV[0][0] == ?-)
+  case ARGV[0]
+  when '--'
+    ARGV.shift
+    break;
+  when '-l'
+    ARGV.shift
+    add_path = true
+  when '-v'
+    ARGV.shift
+    verbose = true
+  when '-h'
+    help_msg
+    exit(0)
+  else
+    print "Argument Error!! : unknown option '#{ARGV[0]}'\n"
+    help_msg
+    exit(1)
+  end
+end
+
 if ARGV[0]
   dir = File.expand_path(ARGV[0])
 else
   dir = File.dirname(File.expand_path(__FILE__))
 end
 
+if add_path
+  $LOAD_PATH.unshift(dir)
+  if File.basename(dir) == 'tkextlib'
+    $LOAD_PATH.unshift(File.dirname(dir))
+  end
+end
+
 print "\nRuby/Tk extension library checker\n"
 print "( Note:: This check is very simple one. Shown status may be wrong. )\n"
-print "\n check directory :: #{dir}\n"
+print "\n check directory :: #{dir}"
+print "\n $LOAD_PATH :: #{$LOAD_PATH.inspect}\n"
 
 def get_pkg_list(file)
   pkg_list = []
@@ -36,12 +79,16 @@ def get_pkg_list(file)
       pkg = [$2, :script]
       pkg_list << pkg unless pkg_list.member?(pkg)
     end
+    if l =~ /^(?:[^#]+\s|\s*)(?:|;\s*)require\s*\(?\s*(["'])((\w|\/|:)+)\1/
+      pkg = [$2, :require_ruby_lib]
+      pkg_list << pkg unless pkg_list.member?(pkg)
+    end
   }
 
   pkg_list
 end
 
-def check_pkg(file)
+def check_pkg(file, verbose=false)
   pkg_list = get_pkg_list(file)
 
   error_list = []
@@ -67,9 +114,16 @@ def check_pkg(file)
 	success_list[name] = :script
 	error_list.delete_if{|n, t| n == name}
 
+      when :require_ruby_lib
+	require name
+
+      end
+    rescue => e
+      if verbose
+	error_list << [name, type, e.message]
+      else
+	error_list << [name, type]
       end
-    rescue
-      error_list << [name, type]
     end
   }
 
@@ -86,14 +140,14 @@ def check_pkg(file)
   [success_list, error_list]
 end
 
-def subdir_check(dir)
+def subdir_check(dir, verbose=false)
   Dir.foreach(dir){|f|
     next if f == '.' || f == '..'
     if File.directory?(f)
       subdir_check(File.join(dir, f))
     elsif File.extname(f) == '.rb'
       path = File.join(dir, f)
-      suc, err = check_pkg(path)
+      suc, err = check_pkg(path, verbose)
       if err.empty?
 	print 'Ready : ', path, ' : require->', suc.inspect, "\n"
       else
@@ -108,16 +162,17 @@ Dir.chdir(dir)
 
 (Dir['*.rb'] - ['setup.rb', name]).each{|f|
   subdir = File.basename(f, '.*')
+=begin
   begin
     # read 'setup.rb' as if the library has standard structure
     require File.join(subdir, 'setup.rb')
   rescue LoadError
     # ignore error
   end
-
+=end
   print "\n"
 
-  suc, err = check_pkg(f)
+  suc, err = check_pkg(f, verbose)
   if err.empty?
     print 'Ready : ', f, ' : require->', suc.inspect, "\n"
   else
@@ -125,5 +180,5 @@ Dir.chdir(dir)
       '  FAIL->', err.inspect, "\n"
   end
 
-  subdir_check(subdir) if File.directory?(subdir)
+  subdir_check(subdir, verbose) if File.directory?(subdir)
 }