title: Build Qt in "Release with Debug Info" mode?
body: <p>Is there a way to build Qt in "Release with Debug info" mode ? My application crashes only in "release" mode (works fine in Debug mode) and seems the issue comes from Qt (may be a bug in Qt).So I want to see the debug info of Qt.</p>
  
  <p><a href="http://doc.qt.io/qt-4.8/qmake-variable-reference.html" rel="noreferrer">Qt docs</a> has "debug" , "release" but not "release with debug" mode.</p>
  
  <p>[Upate]</p>
  
  <p>My application works fine with Mingw 32bit Release/Debug and VSC++ Compiler 64bit Debug.</p>
  
  <p>Only crashes on VSC++ 64Bit Release </p>
  
  <p>Any tips ?</p>