Libtorrent ruby devel - Dec 2006 - I can''t install libtorrent-ruby

Hi,

I installed libtorrent-0.11.tar.gz in my system (ubuntu) and now I want 
to install libtorrent-ruby but it does not works:

I downloaded svn version and I run:

xan at rulot:~/provar/2-libruby/libtorrent-ruby/trunk$ ruby setup.rb
---> ext
---> ext/libtorrent
/usr/bin/ruby1.8 
/home/xan/provar/2-libruby/libtorrent-ruby/trunk/ext/libtorrent /extconf.rb
checking for main() in -ltorrent... yes
checking for swig... yes
generating libtorrent wrapper... *** 
/home/xan/provar/2-libruby/libtorrent-ruby/ 
trunk/ext/libtorrent/extconf.rb failed ***
Could not create Makefile due to some reason, probably lack of
necessary libraries and/or headers.  Check the mkmf.log file for more
details.  You may need configuration options.

Provided configuration options:
         --with-opt-dir
         --without-opt-dir
         --with-opt-include
         --without-opt-include=${opt-dir}/include
         --with-opt-lib
         --without-opt-lib=${opt-dir}/lib
         --with-make-prog
         --without-make-prog
 
--srcdir=/home/xan/provar/2-libruby/libtorrent-ruby/trunk/ext/libtorrent
         --curdir
         --ruby=/usr/bin/ruby1.8
         --with-boost-dir
         --without-boost-dir
         --with-boost-include
         --without-boost-include=${boost-dir}/include
         --with-boost-lib
         --without-boost-lib=${boost-dir}/lib
         --with-libtorrent-dir
         --without-libtorrent-dir
         --with-libtorrent-include
         --without-libtorrent-include=${libtorrent-dir}/include
         --with-libtorrent-lib
         --without-libtorrent-lib=${libtorrent-dir}/lib
         --with-torrentlib
         --without-torrentlib
setup.rb:655:in `command'': system("/usr/bin/ruby1.8" 
"/home/xan/provar/2-libruby 
/libtorrent-ruby/trunk/ext/libtorrent/extconf.rb") failed (RuntimeError)
         from setup.rb:660:in `ruby''
         from setup.rb:1238:in `extconf''
         from setup.rb:1230:in `config_dir_ext''
         from setup.rb:1532:in `traverse''
         from setup.rb:1549:in `dive_into''
         from setup.rb:1530:in `traverse''
         from setup.rb:1534:in `traverse''
         from setup.rb:1533:in `traverse''
         from setup.rb:1549:in `dive_into''
         from setup.rb:1530:in `traverse''
         from setup.rb:1524:in `exec_task_traverse''
         from setup.rb:1519:in `exec_task_traverse''
         from setup.rb:1223:in `exec_config''
         from setup.rb:991:in `exec_config''
         from setup.rb:812:in `invoke''
         from setup.rb:773:in `invoke''
         from setup.rb:1578
xan at rulot:~/provar/2-libruby/libtorrent-ruby/trunk$


I don''t know what fails?

Can you help me please?

Thanks in advance,
Xan.