title: R include directory is empty
body: <p>I have RedHat 6.5 (x86_64-redhat-linux-gnu) running <code>R version 3.0.2 (2013-09-25)</code>.</p>
  
  <p>As explained in <a href="https://stackoverflow.com/questions/9950437/installing-r-packages-include-directory-is-empty-development-headers">this SO question</a>, some packages install fine, while others produce the warning "R include directory is empty -- perhaps need to install R-devel.rpm or similar". When this warning appears, I also get <code>make: gcc: Command not found</code> and the package fails to compile. </p>
  
  <p>The answer is apparently to install the "development headers", but I am not sure what this means. The accepted answer does not explain it.</p>
  
  <p>I tried <code>sudo yum install R-devel</code>, but I get some errors related to dependencies. </p>
  
  <pre><code>Error: Package: rstudio-0.95.265-1.x86_64 (@oit-el-6-x86_64/6.3)
         Requires: libRblas.so()(64bit)
         Removing: R-core-3.0.2-1.el6.x86_64 (@oit-stable-epel-x86_64-6)
             libRblas.so()(64bit)
         Updated By: R-core-3.1.0-5.el6.x86_64 (oit-testing-epel-x86_64-6)
             Not found
         ...
  
  Error: Package: rstudio-0.95.265-1.x86_64 (@oit-el-6-x86_64/6.3)
         Requires: libRlapack.so()(64bit)
         Removing: R-core-3.0.2-1.el6.x86_64 (@oit-stable-epel-x86_64-6)
             libRlapack.so()(64bit)
         Updated By: R-core-3.1.0-5.el6.x86_64 (oit-testing-epel-x86_64-6)
             Not found
         ...
  </code></pre>
  
  <p>I'm not sure what this means. New to Linux.</p>