title: Warning in install.packages : installation of package ‘igraph’ had non-zero exit status
body: <p>I want to install phyloseq from BioConductor.  When I do so, and try to load it, I get an error about igraph (even though I set dependencies to be TRUE).  I have tried installing igraph independently, and that is also not working, with non-zero exit status.</p>
  
  <p>I am using RStudio</p>
  
  <p><br>R version 3.4.0 (2017-04-21)
  <br>Platform: x86_64-apple-darwin15.6.0 (64-bit)
  <br>Running under: OS X El Capitan 10.11.6</p>
  
  <p>Does anyone have any advice?  Errors are pasted below.</p>
  
  <p>Thank you for your help!</p>
  
  <p>Here is my command:</p>
  
  <pre><code>install.packages("phyloseq", dependencies = TRUE)
  </code></pre>
  
  <p>Here is the warning:</p>
  
  <p>Warning in install.packages : </p>
  
  <blockquote>
    <p>dependency ‘igraph’ is not available</p>
  </blockquote>
  
  <p><br>Here I try to load the package I want: <code>library("phyloseq")</code></p>
  
  <p>Here is the warning: Error:</p>
  
  <blockquote>
    <p>package or namespace load failed for ‘phyloseq’ in <code>loadNamespace(j &lt;- i[[1L]], c(lib.loc, .libPaths()), versionCheck =   vI[[j]])</code>.  there is no package called ‘igraph’</p>
  </blockquote>
  
  <p>Here I try to install igraph directly: <code>install.packages("igraph", dependencies = TRUE)</code></p>
  
  <p>Here is the compilation failure:</p>
  
  <blockquote>
    <p>ERROR: compilation failed for package ‘graph’ Warning in install.packages : <code>installation of package ‘igraph’ had non-zero exit status</code></p>
  </blockquote>