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

[tkoenig at gcc dot gnu.org]

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

--- Comment #9 from Thomas Koenig <tkoenig at gcc dot gnu.org> ---
(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.