[Bug web/82686] Debian sid powerpc64-unknown-linux-gnu 4.13.0-1-powerpc64 bootstrap breaks in stage3 with unexpected requirement for bdw-gc

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=82686

--- Comment #5 from Jonathan Wakely <redi at gcc dot gnu.org> ---
(In reply to Richard Biener from comment #3)
> --enable-objc-gc requires you to provide boehm-gc yourself now.  Quoting the
> installation instructions:
> 
> @item --enable-objc-gc
> Specify that an additional variant of the GNU Objective-C runtime library
> is built, using an external build of the Boehm-Demers-Weiser garbage
> collector (@uref{http://www.hboehm.info/gc/}).  This library needs to be
> available for each multilib variant,
            ^^^^^^^^^^^^^^^^^^^^^^^^^

Did you do that?