salut,

problème d'installation de la gemme ruby-debug :

[root@localhost lolveley]# gem install ruby-debug
Bulk updating Gem source index for: http://gems.rubyforge.org
Building native extensions. This could take a while...
ERROR: Error installing ruby-debug:
ERROR: Failed to build gem native extension.

/usr/bin/ruby extconf.rb install ruby-debug
mkmf.rb can't find header files for ruby at /usr/lib/ruby/ruby.h


Gem files will remain installed in
/usr/lib/ruby/gems/1.8/gems/linecache-0.43 for inspection.
Results logged to
/usr/lib/ruby/gems/1.8/gems/linecache-0.43/ext/gem_make.out
je ne le comprends pas.
pouvez-vous m'aider?