[Bug driver/71930] g++ invokes the wrong preprocessor

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=71930

--- Comment #6 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Jonathan Wakely from comment #5)
> But this is a dup of PR 67023 anyway.
> 
> *** This bug has been marked as a duplicate of bug 67023 ***

Which I've pointed you to before:
https://gcc.gnu.org/ml/gcc-help/2015-09/msg00081.html