[Bug ada/81878] --disable-bootstrap --enable-languages=ada fails

[rguenth at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81878

--- Comment #7 from Richard Biener <rguenth at gcc dot gnu.org> ---
Ah, it works when leaving CC alone and only changing CXX.  Somewhat
inconsistent I guess.  Let me try if bootstrap also still works.