[root@localhost mod_ruby-1.3.0]# httpd -v
Server version: Apache/2.2.14 (Unix)
Server built:   Dec  3 2009 10:25:57
[root@localhost mod_ruby-1.3.0]# ls
apache_cookie.c            apache_multipart_buffer.h  bucket.c         cookie.c  install-rb         Makefile.in      multival.c    request.c           table.c
apache_cookie.h            apache_request.c           ChangeLog        COPYING   LEGAL              Makefile.libdir  NOTICE        ruby_config.c       upload.c
apachelib.c                apache_request.h           configure.rb     doc       lib                Makefile.tmpl    paramtable.c  ruby_config.h       uri.c
apachelib.h                array_header.c             configure.rb.in  error.c   libruby.module.in  mod_ruby.c       README.en     ruby_shared_stub.c
apache_multipart_buffer.c  autoconf.rb                connection.c     examples  LICENSE.apreq      mod_ruby.h       README.ja     server.c
[root@localhost mod_ruby-1.3.0]# ./configure.rb
can't find header files for ruby.
[root@localhost mod_ruby-1.3.0]# ./configure.rb --help
can't find header files for ruby.
[root@localhost mod_ruby-1.3.0]# ruby -v
ruby 1.8.6 (2009-08-04 patchlevel 383) [x86_64-linux]