Hi,

In <a1b1d6ceaae4244026ad0c9f1624eebb / ruby-forum.com>
  "Problem with installing Ruby GTK" on Mon, 21 Feb 2011 11:43:24 +0900,
  Karthikeyan A k <mindaslab / gmail.com> wrote:

> I tried to install Ruby GTK using the following command on my Ubuntu:
> 
> $ sudo gem install gtk2
> 
> and it spits out some error as shown:
> 
> Building native extensions.  This could take a while...
> ERROR:  Error installing gtk2:
>   ERROR: Failed to build gem native extension.
> 
> /usr/local/ruby/bin/ruby extconf.rb
> checking for GCC... yes
> checking for rb_define_alloc_func() in ruby.h... yes
> checking for rb_block_proc() in ruby.h... yes
> checking for new allocation framework... yes
> checking for attribute assignment... no
> checking for Win32 OS... no
> checking for gobject-2.0... no
> 
> How to fix it?

Try the following command:

  % sudo aptitude install -y libgtk2.0-dev
  % sudo gem install gtk2


Thanks,
--
kou