Debug Macro From http://stackoverflow.com/questions/1941307/c-debug-print-macros
#define DEBUG 3
#if defined(DEBUG) && DEBUG > 0
#define DEBUG_PRINT(fmt, args...) fprintf(stderr, "DEBUG: %s:%d:%s(): " fmt, \
__FILE__, __LINE__, __func__, ##args)
#else
#define DEBUG_PRINT(fmt, args...) /* Don't do anything in release builds */
#endif
int main(int argc, char **args) {
DEBUG_PRINT("Debugging is enabled.\n");
DEBUG_PRINT("Debug level: %d", (int) DEBUG);
}