output.txt

(1008) [17:54:21 quintus@roma] ~
% ruby -v
ruby 2.0.0p0 (2013-02-24 revision 39474) [x86_64-linux]
(1009) [17:55:21 quintus@roma] ~
% gem -v
2.0.0
(1010) [17:55:22 quintus@roma] ~
% gem env
RubyGems Environment:
  - RUBYGEMS VERSION: 2.0.0
  - RUBY VERSION: 2.0.0 (2013-02-24 patchlevel 0) [x86_64-linux]
  - INSTALLATION DIRECTORY: /opt/rubies/ruby-2.0.0-p0/lib/ruby/gems/2.0.0
  - RUBY EXECUTABLE: /opt/rubies/ruby-2.0.0-p0/bin/ruby
  - EXECUTABLE DIRECTORY: /opt/rubies/ruby-2.0.0-p0/bin
  - RUBYGEMS PLATFORMS:
    - ruby
    - x86_64-linux
  - GEM PATHS:
     - /opt/rubies/ruby-2.0.0-p0/lib/ruby/gems/2.0.0
     - /home/quintus/.gem/ruby/2.0.0
  - GEM CONFIGURATION:
     - :update_sources => true
     - :verbose => true
     - :backtrace => false
     - :bulk_threshold => 1000
     - "install" => "--format-executable"
     - "update" => "--format-executable"
  - REMOTE SOURCES:
     - http://rubygems.org/
(1011) [17:55:27 quintus@roma] ~
% LANG=en_US.utf8 sudo gem install rbtree
Building native extensions.  This could take a while...
ERROR:  Error installing rbtree:
	ERROR: Failed to build gem native extension.

    /opt/rubies/ruby-2.0.0-p0/bin/ruby extconf.rb
checking for ruby/st.h... yes
checking for rb_exec_recursive() in ruby.h... yes
creating Makefile

make
compiling rbtree.c
compiling dict.c
linking shared-object rbtree.so

make install
/usr/bin/install -c -m 0755 rbtree.so /opt/rubies/ruby-2.0.0-p0/lib/ruby/gems/2.0.0/gems/rbtree-0.3.0/.
/usr/bin/install: ‘rbtree.so’ and ‘/opt/rubies/ruby-2.0.0-p0/lib/ruby/gems/2.0.0/gems/rbtree-0.3.0/./rbtree.so’ are the same file
make: *** [install-so] Error 1


Gem files will remain installed in /opt/rubies/ruby-2.0.0-p0/lib/ruby/gems/2.0.0/gems/rbtree-0.3.0 for inspection.
Results logged to /opt/rubies/ruby-2.0.0-p0/lib/ruby/gems/2.0.0/gems/rbtree-0.3.0/./gem_make.out