https://gcc.gnu.org/bugzilla/show_bug.cgi?id=108763
--- Comment #3 from Andrew Pinski <pinskia at gcc dot gnu.org> --- Reading the code on I think it would need some huge work to get it working on GDC really. Especially on aarch64. Mainly because the way var_args is defined is something which is very much target specific. and GCC implements var_args internally to optimize some cases sometimes.
