https://gcc.gnu.org/bugzilla/show_bug.cgi?id=48396
--- Comment #5 from CVS Commits <cvs-commit at gcc dot gnu.org> --- The master branch has been updated by Jason Merrill <ja...@gcc.gnu.org>: https://gcc.gnu.org/g:a53781c8fd258608780821168a7f5faf7be63690 commit r12-3538-ga53781c8fd258608780821168a7f5faf7be63690 Author: Jason Merrill <ja...@redhat.com> Date: Tue Sep 14 17:37:27 2021 -0400 c++: don't predeclare std::type_info [PR48396] We've always predeclared std::type_info, which has been wrong for a while, but now with modules it becomes more of a practical problem, if we want to declare it in the purview of a module. So don't predeclare it. For building up the type_info information to write out with the vtable, we can use void* instead of type_info*, since they already aren't the real types. PR c++/48396 gcc/cp/ChangeLog: * cp-tree.h (enum cp_tree_index): Remove CPTI_TYPE_INFO_PTR_TYPE. (type_info_ptr_type): Remove. * rtti.c (init_rtti_processing): Don't predeclare std::type_info. (typeid_ok_p): Check for null const_type_info_type_node. (type_info_ptr_type, get_void_tinfo_ptr): New fns. (get_tinfo_decl_dynamic, get_tinfo_ptr): Use them. (ptr_initializer, ptm_initializer, get_pseudo_ti_init): Use them. (get_tinfo_desc): Use const_ptr_type_node. gcc/testsuite/ChangeLog: * g++.dg/rtti/undeclared1.C: New test.
