title: Eclipse/CDT editor not picking up project-defined symbols in coloring ifdef'ed out sections
body: <p>The problem I'm seeing is that under preferences, C/C++ Defined symbols for different Configurations/targets aren't showing up in the code coloring. </p>
  
  <p>When I change the active build configuration in the project menu, I would expect the editor &amp; code coloring to pick up the symbols from the project settings, but it only seems to be picking up the symbols for one of the targets.</p>
  
  <p>Is there any way to have the code coloring for ifdef'ed code follow the active build configuration? </p>