This will merge the following topic branches: * builtin-dyn: Expansion of macros like __FILE__, __DATE__, ... must, contrary to usual macros, be done dynamically. This series improves support for them: - consider them as defined (like GCC do) - use table + method for their expansion (avoid useless compares) - add support for __INCLUDE_LEVEL__ & __BASE_FILE__ * builtin-predef: Add a function: predefine() which allow to directly add the definition of a simple macro (without args and with a single number or ident as definition). Also do the conversion of the concerned predefined macros and some cleanups. * builtin-overflow: Add support for builtins doing overflow checking. * has-builtin: Add support for the __has_builtin() macro. Signed-off-by: Luc Van Oostenryck <luc.vanoostenryck@gmail.com>