Hello, I would like to have some code for debugging reasons in a big project that I'm working on, but not via commenting and uncommenting source code lines, as this will be too time-consuming. So, I wonder if there is some way to make gcc create some kind of a global variable or a definition or something like that, that will allow me to inject in my source files pieces of code like this: # if SOME_DEBUG_FLAG do_some_debugging_stuff (); # endif I searched in the man pages, but I wasn't able to find anything related to this subject. Any help will be much appreciated! Cheers, John. -- John Coube Arrakis