\lib\IronRuby;C:\IronRuby\lib\ruby\1.8;C:\IronRuby\lib\ruby\site_ruby;C:\IronRuby\lib\ruby\site_ruby\-20bc41b\Merlin\Main\Hosts\IronRuby.Rack\RubyEngine.cs:52:in `Execute'
from D:\Dev\ironruby\ironruby-ironruby-20bc
E:/ironruby-1.0v4/bin/ir.exe extconf.rb
can't find header files for ruby.Gem files will remain installed in E:/ironruby-1.0v4/lib/ironruby/gems/1.8/gems/ruby-odbc-0.99993 forResults logged to E:/ironruby-