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

[Ian Zimmerman]

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.

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