title: sqlite3-ruby install error on Ubuntu
body: <p>I have the following error during sqlite3-ruby install:</p>
  
  <pre>
  Building native extensions.  This could take a while...
  ERROR:  Error installing sqlite3-ruby:
      ERROR: Failed to build gem native extension.
  
  /usr/bin/ruby1.8 extconf.rb
  checking for sqlite3.h... no
  sqlite3.h is missing. Try 'port install sqlite3 +universal' or 'yum install sqlite3-devel'
  *** 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=.
      --curdir
      --ruby=/usr/bin/ruby1.8
      --with-sqlite3-dir
      --without-sqlite3-dir
      --with-sqlite3-include
      --without-sqlite3-include=${sqlite3-dir}/include
      --with-sqlite3-lib
      --without-sqlite3-lib=${sqlite3-dir}/lib
  
  
  Gem files will remain installed in /usr/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.3.1 for inspection.
  Results logged to /usr/lib/ruby/gems/1.8/gems/sqlite3-ruby-1.3.1/ext/sqlite3/gem_make.out
  </pre>
  
  <p>sqlite3.h is located in /usr/include/</p>
  
  <pre>
  sudo gem install sqlite3-ruby --without-sqlite3-include=/usr/include
  </pre>
  
  <p>doesn't work</p>
  
  <pre>
  
  ERROR:  While executing gem ... (OptionParser::InvalidOption)
      invalid option: --without-sqlite3-include=/usr/include
  </pre>
  
  <p>Ubuntu 10.04</p>