title: unable to install rvest package
body: <p>I need to install rvest package for R version 3.1.2 (2014-10-31)</p>
  
  <p>I get these errors:</p>
  
  <pre><code>    checking whether the C++ compiler supports the long long type... no
  *** stringi cannot be built. Upgrade your C++ compiler's settings
  ERROR: configuration failed for package ‘stringi’
  * removing ‘/usr/local/lib64/R/library/stringi’
  ERROR: dependency ‘stringi’ is not available for package ‘stringr’
  * removing ‘/usr/local/lib64/R/library/stringr’
  ERROR: dependency ‘stringr’ is not available for package ‘httr’
  * removing ‘/usr/local/lib64/R/library/httr’
  ERROR: dependency ‘stringr’ is not available for package ‘selectr’
  * removing ‘/usr/local/lib64/R/library/selectr’
  ERROR: dependencies ‘httr’, ‘selectr’ are not available for package ‘rvest’
  * removing ‘/usr/local/lib64/R/library/rvest’
  </code></pre>
  
  <p>Any ideas on how I could install R package rvest?</p>