[Bug target/104713] gcc does not reject -march=i686 -fcf-protection

[jay+ggcc@jp-hosting.net]

https://gcc.gnu.org/bugzilla/show_bug.cgi?id=104713

--- Comment #8 from James Addison <jay+ggcc@jp-hosting.net> ---
(In reply to James Addison from comment #7)
> (In reply to Adrian Bunk from comment #6)
> > (In reply to James Addison from comment #5)
> > > Could the findings indicate that there are two bugs here?
> > > 
> > >   - The Geode LX target capable of supporting fcf-protection but GCC-11
> > > currently rejects that architecture and flag combination
> > 
> > The problem is the opposite.
> 
> Ok, thank you.
> 
> Something that's unclear to me is whether fcf-protection requires NOPL
> (multi-byte NOP).  I understand that it requires endbr32.
> 
> Was my second statement (re: GCC-11 emitting NOPL for i686) correct?

I haven't been able to replicate generation of NOPL instructions using GCC-11
(with GNU binutils); my apologies for the distraction.