[Bug libstdc++/29366] atomics config for sh is weird

[olegendo at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=29366

--- Comment #13 from Oleg Endo <olegendo at gcc dot gnu.org> ---
(In reply to Andrew Pinski from comment #12)
> (In reply to Oleg Endo from comment #6)
> > Created attachment 34478 [details]
> > proposed workaround patch
> > 
> > There hasn't been any update for PR 53579.  I'd like to propose the attached
> > patch as a work around until the CXXFLAGS_FOR_TARGET issues has been
> > figured/sorted out.
> 
> So it turns out they have been sorted out since GCC 5 but nobody noticed. So
> you might want to relook into this.

I shall.  Thanks for chasing this.