Re: [PATCH 40/46] x86/livepatch, lto: Disable live patching with gcc LTO

Andi Kleen
2022-11-14T20:36:38Z

On Mon, Nov 14, 2022 at 11:07:42AM -0800, Josh Poimboeuf wrote:
> On Mon, Nov 14, 2022 at 12:43:38PM +0100, Jiri Slaby (SUSE) wrote:
> > From: Andi Kleen <andi@firstfloor.org>
> >
> > It is not supported by gcc 12 so far, so it causes compiler "sorry"
> > messages.
>
> What specifically is not supported by GCC 12?

-fwhole-program and the live patching options are mutually exclusive.
Okay I suppose it could be handled by disabling -fwhole-program, although
that might limit some optimizations.

> What are the "sorry" messages?

It's an error message from the compiler telling you that something is
not implemented.

-Andi