title: libssh's functions couldn't be found on qt
body: <p>I have cloned libssh library and built it with cmake. Building process was like this :</p>
  <pre><code>git clone https://git.libssh.org/projects/libssh.git/
  mkdir build in libssh directory.
  cd build   
  cmake -DUNIT_TESTING=ON -DCMAKE_INSTALL_PREFIX=/usr -DCMAKE_BUILD_TYPE=Debug ..
  after this line i got this error about cmocka:
  Could NOT find CMocka (missing: CMOCKA_LIBRARIES CMOCKA_INCLUDE_DIR)
  then : rm CMakeCache.txt 
  cmake ..
  make 
  sudo make install
  </code></pre>
  <p>Now I want to use this library on qt but I have some issues there.</p>
  <p>I got errors like :</p>
  <pre><code>error: undefined reference to `ssh_session_is_known_server'
  </code></pre>
  <p>I can't use any of function or structures on this library. My OS is ubuntu 18.04.</p>