title: Installing glib in non-standard prefix fails
body: <p>I'm trying to install glib in a non-standard prefix but I get the following when running <code>make install</code>:</p>
  
  <pre><code>/bin/sh ../libtool --mode=install /usr/bin/install -c libgthread-2.0.la '/root/build/lib'
  libtool: install: error: cannot install `libgthread-2.0.la' to a directory not ending in /usr/local/lib
  </code></pre>
  
  <p>Any reason why I <em>have to</em> install gthread only in a prefix ending with /usr/local/lib?</p>