title: On OS X, what is the proper setting for $QTDIR?
body: <p>I'm trying to install QtROOT, and as part of the installation (specifically, the readme file in the QtROOT tarball at <a href="http://root.bnl.gov/QtRoot/downloads/qtFullRoot.tar.gz" rel="nofollow noreferrer">http://root.bnl.gov/QtRoot/downloads/qtFullRoot.tar.gz</a>), it mentions to make sure that QTDIR is set.  I've installed from the Qt 4.6.3 SDK installation for Mac OS X, and I have no such environment variable set.  I've tried googling to figure out where it should be set to, but the options I've found (such as /usr/local/qt) don't exist.  What should this variable be set to?</p>
  
  <p>OS X 10.6.4, Qt 4.6.3, ROOT 5.26/00, QtROOT... I have no idea. :P</p>
  
  <p>Thanks,</p>
  
  <p>Paul</p>