[Bug bootstrap/109460] Build gcc for win32 failed in gcc13 master branch

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

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=109460

--- Comment #19 from Eric Botcazou <ebotcazou at gcc dot gnu.org> ---
It's the -r option passed to the compiler, it was not really supported in older
compiler (and certainly not documented).