Re: [gentoo-user] Re: gcc 7.3 + kernel 4.15 = spectre_v2 fixed

[Mick]

On Monday, 29 January 2018 18:35:58 GMT Mike Gilbert wrote:
> On Mon, Jan 29, 2018 at 12:50 PM, Ian Zimmerman <itz@××××××××××××.org>
wrote:
> > On 2018-01-29 20:11, Adam Carter wrote:
> >> Comparing the contents of
> >> /sys/devices/system/cpu/vulnerabilities/spectre_v2
> >>
> >> With gcc 7.2 + kernel 4.14.15;
> >> Intel system shows; Vulnerable: Minimal generic ASM retpoline
> >> AMD system shows: Vulnerable: Minimal AMD ASM retpoline
> >>
> >> With gcc 7.3 + kernel 4.15.0;
> >> Intel system shows; Mitigation: Full generic retpoline
> >> AMD system shows' Mitigation: Full AMD retpoline
> >
> > Is there a simple way, with the upstream (kernel.org) sources, to force
> > a compiler different from the system default?  If there is, it's not in
> > the
> > README, and a simple grep over the Makefiles also doesn't enlighten.
> >
> > I am not ready to activate a keyworded gcc for general use.
>
> You could pass CC=gcc-7.3.0 to the make command, like so:
>
> make -j6 CC=gcc-7.3.0

Shouldn't you have at least compiled your whole toolchain with gcc-7.3.0 
first?

-- 
Regards,
Mick