title: "fatal error: iconv.h: No such file or directory" on compiling libxml2
body: <p>I'm trying to install <a href="https://github.com/moovweb/gokogiri" rel="nofollow noreferrer">gokogiri</a> on Windows 8 PC by running this command : <code>go get github.com/moovweb/gokogiri</code>, but then I get the error in title (full error message at the bottom of question).</p>
  
  <p><a href="https://stackoverflow.com/questions/30960805/error-libxml2-not-found-on-installing-gokogiri-on-windows"><code>gokogiri</code> has dependency to <code>libxml2</code></a> and in turn, <code>libxml2</code> seems dependent on <code>iconv</code>. I guess I need to change <code>libxml-2.0.pc</code> file, which looks like a configuration file, to tell location of <code>incov</code> files which I've downloaded separately. But I'm not sure which part of <code>libxml-2.0.pc</code> I need to modify and how? Every modification I've tried so far didn't solve the error.</p>
  
  <p><strong>libxml-2.0.pc</strong></p>
  
  <pre><code>prefix=/usr/local
  exec_prefix=${prefix}
  libdir=${exec_prefix}/lib
  includedir=${prefix}/include
  modules=1
  
  Name: libXML
  Version: 2.9.2
  Description: libXML library version2.
  Requires:
  Libs: -L${libdir} -lxml2
  Libs.private:   -L/usr/local/lib -lz  -L/usr/local/lib -liconv  -lws2_32 
  Cflags: -I${includedir}/libxml2 -I/usr/local/include 
  </code></pre>
  
  <p><strong>error message :</strong></p>
  
  <p><img src="https://i.stack.imgur.com/GFVjt.png" alt="enter image description here"></p>