[Bug libstdc++/86450] Bootstrap failure due to -Wabi

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=86450

--- Comment #11 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Thomas Koenig from comment #9)
> (In reply to Jonathan Wakely from comment #7)
> > These warnings have been present for weeks - the idea that they're suddenly
> > preventing anybody from working on gfortran is odd. Why can't you use
> > autoconf  or autoreconf like everybody else?
> 
> It is odd that somebody who apparently does not know gfortran
> comes to such a judgement without knowing the details.
> 
> Hint: Regenerating m4 files in libgfortran.

Hint: maintainer mode is not magic, whatever it does can be done manually too.

And does --disable-werror help?