title: Building 64bit application with makefiles using cmake-gui
body: <p>When I run <code>cmake-gui</code> and hit configure, I can specify the generator for my project. I can choose Visual Studio solution, Eclipse, makefiles etc...</p>
  
  <p>I am on 64bit system and want to build 64bit application. Till now, I used Visual Studio 10 Win64 generator to generate my solutions. No I want to (have to) build it with makefiles. But there is no options 32b/64b.</p>
  
  <p>Are makefiles for 64bit build used by default (on 64b system) and for 32b only after using something like <code>export CFLAGS=-m32</code> inside my cmake files?</p>