title: Integrate Qt VS tools with vcpkg-installed qt
body: <p><strong>Platform</strong>: Visual Studio 2017 / Qt 5.11 / vcpkg 2018.10.20-nohash / Windows 10 1803 64</p>
  
  <p>I have installed the qt5 library using vcpkg <code>./vcpkg install qt5:x64-windows</code></p>
  
  <p>Under <code>${vcpkg_root}/installed/x64-windows/tools</code>, there are 6 sub-directories:</p>
  
  <ol>
  <li><p>qt5: holds 2 conf files qt_release.conf and qt_debug.conf having the following structure:  </p>
  
  <p>[Paths]<br>
  Prefix = ${CURRENT_INSTALLED_DIR}<br>
  Documentation = share/qt5/doc<br>
  Headers = include<br>
  Libraries = debug/lib<br>
  Binaries = debug/tools/qt5<br>
  LibraryExecutables = debug/tools/qt5<br>
  Plugins = debug/plugins<br>
  Qml2Imports = debug/qml<br>
  Data = share/qt5/debug<br>
  ArchData = share/qt5/debug<br>
  HostData = share/qt5/debug<br>
  HostBinaries = tools/qt5</p></li>
  <li><p>qt5-3d, qt5-declarative, qt5-scxml, qt5-tools, and qt5-xmlpatterns which all have an empty qt.conf file</p></li>
  </ol>
  
  <p>I tried to add all the possible paths in the "Add New Qt Version" of the Qt VS Tools, each time I get the error:</p>
  
  <p><code>${SPECIFIED_PATH}/bin/qmake.exe is not found</code>.
  qmake.exe is directly under qt5 directory, there is no bin/ sub-directory.</p>
  
  <pre><code>.\qmake.exe -v
  QMake version 3.1
  Using Qt version 5.11.2 in C:/vcpkg/installed/x64-windows/tools/qt5/${CURRENT_INSTALLED_DIR}/debug/lib
  </code></pre>
  
  <p>I also considered adding bin/ subdirectory and moving qmake.exe there, however I found that multiple other issues would arise when I read this thread <a href="https://github.com/Microsoft/vcpkg/issues/2643" rel="nofollow noreferrer">https://github.com/Microsoft/vcpkg/issues/2643</a>.</p>
  
  <p>How to integrate the qt library to the QtVSTools correctly ?</p>