title: Error when installing gpclib
body: <p>R version 3.2.1</p>
  <p>I downloaded gpclib_1.5-5.tar.gz from <a href="http://cran.r-project.org/web/packages/gpclib/index.html" rel="nofollow noreferrer">http://cran.r-project.org/web/packages/gpclib/index.html</a> and attempted to install the package with</p>
  <p><code>install.packages(&quot;D:/GIS/gpclib_1.5-5.tar.gz&quot;, repos = NULL, type = &quot;source&quot;)</code></p>
  <p>I get the error</p>
  <pre><code>* installing *source* package 'gpclib' ...
  ** package 'gpclib' successfully unpacked and MD5 sums checked
  ** libs
  
  *** arch - i386
  Warning: running command 'make -f &quot;D:/R/R-3.2.1/etc/i386/Makeconf&quot; -f &quot;D:/R/R-3.2.1/share/make/winshlib.mk&quot; SHLIB=&quot;gpclib.dll&quot; OBJECTS=&quot;Rgpc.o gpc.o&quot;' had status 127
  ERROR: compilation failed for package 'gpclib'
  * removing 'D:/R/R-3.2.1/library/gpclib'
  Warning in install.packages :
    running command '&quot;D:/R/R-3.2.1/bin/x64/R&quot; CMD INSTALL -l &quot;D:\R\R-3.2.1\library&quot; &quot;D:/GIS/gpclib_1.5-5.tar.gz&quot;' had status 1
  Warning in install.packages :
    installation of package ‘D:/GIS/gpclib_1.5-5.tar.gz’ had non-zero exit status
  </code></pre>
  <p>How do I troubleshoot this?</p>
  <h3>Extra Information</h3>
  <p>I am ultimately trying to create heat maps, and am following this tutorial</p>
  <p><a href="http://spatialanalysis.co.uk/wp-content/uploads/2013/04/james_cheshire_ggplot_intro_blog.pdf" rel="nofollow noreferrer">http://spatialanalysis.co.uk/wp-content/uploads/2013/04/james_cheshire_ggplot_intro_blog.pdf</a></p>