title: Changing QMAKESPEC from within eclipse?
body: <p>I have a project I am working on, and need to be able to compile both 32bit and 64bit versions on linux. I have both 32 and 64bit versions of the Qt libraries installed, and use eclipse to do my work. Inside eclipse I can switch between the different Qt versions through the <em>Qt properties</em> menu in project properties. My question is this:</p>
  
  <p>Since the machine is 64bit, QMAKESPEC is linux-g++-64 by default, even if I switch my qt libraries to the 32 bit versions, g++ still outputs 64bit object files- which I cannot link with other 32bit libraries. I know one can export the QMAKESPEC environment variable, and that works in the shell, but is it possible to do this within eclipse? So that when I run qmake within eclipse, the appropriate QMAKESPEC is applied?</p>
  
  <p>Thank you in advance!</p>