title: How to help 'FindPkgConfig.cmake' to find a package?
body: <p>I am trying to compile my project and my project is using <code>sqlcipher</code> package. <code>sqlcipher</code> is cloned and installed in a custom path and I exported this path through <code>$PATH</code> in the <code>~/.bashrc</code> file. After configuration if I type <code>sqlcipher</code> in the terminal its working fine, but when I try to <code>cmake</code> my project on the same terminal its giving </p>
  
  <pre><code>-- Checking for one of the modules 'sqlcipher'
  CMake Error at /usr/share/cmake-3.5/Modules/FindPkgConfig.cmake:578 (message):
    None of the required 'sqlcipher' found
  </code></pre>
  
  <p>I guess I have to provide this custom path to cmake for finding this package. How to provide custom path to cmake? Where I am doing the mistake?</p>