Re: [PATCH v2 3/6] configure: add option to enable LTO

[Daniele Buono]

If LTO is enabled with the wrong linker/ar:
- with the checks, it will exit at configure with an error. I can change 
this in a warning and disabling LTO if preferred.
- without the checks compilation will fail

If LTO is enabled with the wrong compiler (e.g. old gcc), you may get a 
bunch of warnings at compile time, and a binary that won't pass some of 
the tests in make check.

On 10/28/2020 2:44 AM, Paolo Bonzini wrote:
> On 27/10/20 21:42, Daniele Buono wrote:
> > Ok, no problem. I can definitely disable the check on GCC.
> >
> > Paolo, would you like me to disable checks on AR/linker for lto too?
> > If so, should I add some of this information on a document, perhaps
> > docs/devel/lto.rst, so it is written somewhere for future uses?
>
> I am not sure of the effects.  Does it simply effectively disable LTO or
> is it something worse?
>
> I'll look into the SCSI issue.
>
> Paolo