https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114968
--- Comment #7 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
(In reply to LIU Hao from comment #6)
> I suspect this isn't correct. I am getting strange errors like 'ld exited
> with code 5' not sure what could cause it (possibly also recent MSYS2
> updates):
>
> ```
> diff --git a/gcc/cp/decl.cc b/gcc/cp/decl.cc
> index 2af026d255d..f5dce6a93bc 100644
> --- a/gcc/cp/decl.cc
> +++ b/gcc/cp/decl.cc
> @@ -9669,6 +9669,16 @@ get_atexit_fn_ptr_type (void)
>
> fn_type = build_function_type_list (void_type_node,
> arg_type, NULL_TREE);
> +#ifdef IX86_CALLCVT_THISCALL
> + if (flag_use_cxa_atexit
> + && !targetm.cxx.use_atexit_for_cxa_atexit ())
> + {
> + fn_type = copy_node (fn_type);
> + TYPE_ATTRIBUTES (fn_type) = tree_cons (
> + get_identifier ("thiscall"), NULL_TREE,
> + TYPE_ATTRIBUTES (fn_type));
> + }
> +#endif
> atexit_fn_ptr_type_node = build_pointer_type (fn_type);
> }
>
> diff --git a/gcc/cp/except.cc b/gcc/cp/except.cc
> index f1ffda22fd3..00a8843fa2e 100644
> --- a/gcc/cp/except.cc
> +++ b/gcc/cp/except.cc
> @@ -648,6 +648,12 @@ build_throw (location_t loc, tree exp, tsubst_flags_t
> complain)
> {
> tree tmp = build_function_type_list (void_type_node,
> ptr_type_node, NULL_TREE);
> +#ifdef IX86_CALLCVT_THISCALL
> + tmp = copy_node (tmp);
> + TYPE_ATTRIBUTES (tmp) = tree_cons (
> + get_identifier ("thiscall"), NULL_TREE,
> + TYPE_ATTRIBUTES (tmp));
> +#endif
> cleanup_type = build_pointer_type (tmp);
> }
>
>
> ```
Besides wrong formatting and the case that you need to build_variant_type (or
build_distinct_type?, one needs to look at what will be normally done if you
do:
void (__attribute__((thiscall)) *fn) (void);
), you really can't do it like that. IX86_CALLCVT_THISCALL is defined on all
x86_64/i?86 targets, so not limited to mingw 32-bit.
