Sometimes it may be necassary to remove a function or a class. In this case the function or class will first be declared deprecated and removed in a later version. If you try to use a deprecated function or class and you use GCC (or any other compiler that supports GCC like deprecations), the compiler will warn you that you are using deprecated functionality. You can disable these warnings by defining YAT_DEPRECATE before including the header file in question

#define YAT_DEPRECATE
#include <yat/utility/foo.h>