https://gcc.gnu.org/bugzilla/show_bug.cgi?id=116016
--- Comment #34 from qinzhao at gcc dot gnu.org --- (In reply to Bill Wendling from comment #33) > > If we had a way of testing for an attribute, we could avoid the need to > return ( void *)0 when the '__builtin_get' can't find the attribute: > > __builtin_has_attr (ptr, attr_name); GCC currently supports such builtin already: https://gcc.gnu.org/onlinedocs/gcc/Other-Builtins.html#index-_005f_005fbuiltin_005fhas_005fattribute Built-in Function: bool __builtin_has_attribute (type-or-expression, attribute)
