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SubjectRe: [RFC PATCH 4/7] kconfig: support new special property shell=
On Mon, Feb 12, 2018 at 11:27:25AM +0100, Thomas Gleixner wrote:
> On Mon, 12 Feb 2018, Peter Zijlstra wrote:
>
> > On Sun, Feb 11, 2018 at 10:13:44AM -0800, Linus Torvalds wrote:
> >
> > > That actually sounds like we could just
> > >
> > > (a) make gcc 4.5 be the minimum required version
> > >
> > > (b) actually error out if we find a bad compiler
> >
> > So the unofficial plan was to enforce asm-goto and -fentry support by
> > hard failure to build, which would get us at gcc-4.6 and then remove all
>
> Has gcc-4.6 a (planned) retpoline backport? IIRC the cutoff for that was
> gcc 4.9

Official GCC will not do retpoline before 4.9 AFAIK. But if someone
were to want to build a RETPOLINE=n kernel I don't see why we should
mandate retpoline.

Also, distro's have backported retpoline much further back already.

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