[Bug target/114968] [14/15 Regression] missing `__thiscall` attribute on builtin declaration of `__cxa_thread_atexit()`

[jakub at gcc dot gnu.org via Gcc-bugs]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=114968

--- Comment #8 from Jakub Jelinek <jakub at gcc dot gnu.org> ---
Created attachment 58123
  --> https://gcc.gnu.org/bugzilla/attachment.cgi?id=58123&action=edit
gcc15-pr114968.patch

This is what I'd do, but completely untested...