title: how to install libcurl on windows 7 64bit
body: <p>I am getting the following error while installing:</p>
  
  <p><code>C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/json_web_token-0.3.2/lib/json_web_token.rb:36: warning: already initialized constant JWT</code></p>
  
  <p><code>C:/RailsInstaller/Ruby2.2.0/lib/ruby/gems/2.2.0/gems/jwt-1.5.6/lib/jwt/json.rb:4: warning: previous definition of JWT was here
  rake aborted!</code></p>
  
  <p><code>LoadError: Could not open library 'libcurl': The specified module could not be found.</code></p>
  
  <p><code>.
  Could not open library 'libcurl.dll': The specified module could not be found.</code></p>
  
  <p><code>.
  Could not open library 'libcurl.so.4': The specified module could not be found.</code></p>
  
  <p><code>.
  Could not open library 'libcurl.so.4.dll': The specified module could not be found.</code></p>
  
  <p><code>D:/data/catarse/config/application.rb:8:in</code>'</p>
  
  <p><code>D:/data/catarse/Rakefile:4:in</code>'</p>
  
  <p><code>(See full trace by running task with --trace)</code></p>