title: Can qmake support a folder hierarchy for a Visual Studio solution?
body: <p>I'm developing my project in Visual Studio and I'm using qmake to create the solution file. I'm trying to organize the solution by introducing sub-folders to contain similar projects. However, the solution file produced by qmake has a folder hierarchy of only one level.</p>
  
  <p>Is there any way to configure qmake to produce a folder hierarchy for Visual Studio, similar to the effect of "Add→New Solution Folder" in the Solution Explorer?</p>
  
  <p><strong>Edit</strong>: to clarify, suppose I have this directory structure:</p>
  
  <pre><code>MainDir
     +--- GroupDir1
     |       +--- ProjectDir1
     |       +--- ProjectDir2
     +--- GroupDir2
             +--- ProjectDir3
  </code></pre>
  
  <p>I want the folder hierarchy in the solution <em>as seen in Visual Studio</em> to reflect just that, but this is the solution I manage to generate using qmake:</p>
  
  <pre><code>Solution
     +--- ProjectDir1
     +--- ProjectDir2
     +--- ProjectDir3
  </code></pre>