[Bug libstdc++/81797] gcc 7.1.0 fails to build on macOS 10.13 (High Sierra):

[redi at gcc dot gnu.org]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=81797

--- Comment #36 from Jonathan Wakely <redi at gcc dot gnu.org> ---
Also, this strongly suggests the problem for RTEMS is different:

(In reply to Chris Johns from comment #24)
> I would welcome a patch attached to this ticket. 
> 
> My efforts with .NOTPARALLEL cannot get RTEMS's cross-compiled tools to
> build. I have seen a build work however most fail with a range of headers
> that can vary from build to build. I can see the massive `ln -s` happening
> and after the build fails and stops all the links are present.


i.e. this *is* a target issue (and there should be a separate PR for RTEMS).