title: CMAKE - Debug / Crossbuild?
body: <p>Ok im using CMake to build C++ under Linux, for an ARM target. I have a #DEFINE in one of my .h files called DEBUG. If set, I would like for various methods for tracing over serial will be added into the build. I would like to be able to do this by doing e.g. "make debug" to build with this #DEFINE set, and have normal "make" build without setting it. Is this possible? </p>
  
  <p>Also, it it possible to be able to specify a target to CMake? As I have 2 CMakeLists.txt right now, one for x86, and one for Armel (with different options such as to build with debug information on x86, compared to the ARM, which wants a stripped, size-optimised binary).</p>