title: An error occurred while installing curb (0.8.5)
body: <p>While bundling an old project, this error came up: </p>
  
  <pre><code>Gem::Installer::ExtensionBuildError: ERROR: Failed to build gem native extension.
  
      /home/dd/.rvm/rubies/ruby-2.0.0-p247/bin/ruby extconf.rb 
  checking for curl-config... no
  checking for main() in -lcurl... no
  *** 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=/home/dd/.rvm/rubies/ruby-2.0.0-p247/bin/ruby
      --with-curl-dir
      --without-curl-dir
      --with-curl-include
      --without-curl-include=${curl-dir}/include
      --with-curl-lib
      --without-curl-lib=${curl-dir}/
      --with-curllib
      --without-curllib
  extconf.rb:18:in `&lt;main&gt;':   Can't find libcurl or curl/curl.h (RuntimeError)
  
    Try passing --with-curl-dir or --with-curl-lib and --with-curl-include
    options to extconf.
  
  
  Gem files will remain installed in /home/dd/.rvm/gems/ruby-2.0.0-p247/gems/curb-0.8.5 for inspection.
  Results logged to /home/dd/.rvm/gems/ruby-2.0.0-p247/gems/curb-0.8.5/ext/gem_make.out
  
  An error occurred while installing curb (0.8.5), and Bundler cannot continue.
  Make sure that `gem install curb -v '0.8.5'` succeeds before bundling.
  </code></pre>