* decl.c (warn_extern_redeclared_static): Check DECL_ARTIFICIAL,
	not DECL_BUILT_IN, to determine if a function is internally declared.
	(duplicate_decls): Likewise.  Improve handling of builtins.
	(push_overloaded_decl): Remove special handling of builtins.

	* cp-tree.h (ANON_AGGR_TYPE_P): Use CLASS_TYPE_P.

	* decl.c (grokdeclarator): Pull out decl_constant_value in
	templates, too.

	* class.c (finish_struct, finish_struct_1): Remove 'warn_anon' parm.
	* cp-tree.h, pt.c, semantics.c: Adjust.
	* method.c (largest_union_member): Remove.

From-SVN: r28204