title: force cmake FIND_LIBRARY to look in custom directory
body: <p>cmake version 2.8.4</p>
  
  <p>I have the following apache portable runtime libraries that I have compiled myself and want my application to link against.</p>
  
  <p>My project directory where my apr libraries are:</p>
  
  <pre><code>gw_proj/tools/apr/libs
  </code></pre>
  
  <p>In my CMakeLists.txt I have the following:</p>
  
  <pre><code>FIND_LIBRARY(APRUTIL NAMES "aprutil-1"
    PATHS ${PROJECT_SOURCE_DIR}/tools/apr/libs)
  </code></pre>
  
  <p>My problem is on a machine that already has the apache portable runtime already installed it will look for it in this folder:</p>
  
  <pre><code>/usr/lib
  </code></pre>
  
  <p>So will always ignore my custom path.</p>
  
  <p>How can I force the <code>FIND_LIBRARY</code> to always look in my custom directory:</p>
  
  <pre><code>gw_proj/tools/apr/libs
  </code></pre>
  
  <p>Many thanks for any suggestions</p>