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Re: kernel 4.14.15 compilation using GCC 8 in unstable.......



On Fri, 26 Jan 2018 16:17:27 +0000
Michael Fothergill <michael.fothergill@gmail.com> wrote:

> >>
> > Hi, sorry to jump into the thread this late, I didn't follow the
> > beginning. You can save yourself quite a bit of hassle by downloading
> > the upstream up-to-date vanilla kernel 4.15-rc9 and compile that with
> > Unstable gcc-7. All you need is there already and you will get as
> > good a mitigation for Spectre as one can get right now.
> 
> 
> ​Is the 7.2 kernel in sid gcc 7 really gassed up enough to compile the
> spectre fix in a way that the meltdown-spectre checker will say that the
> compiler used
> was adequate to make the kernel fix work properly?​ A backport from GCC
> 8 to 7 has to be made to make it work - I thought this was only done in
> 7.3.......
> 
> ​Is the sid gcc now 7.3 as someone said earlier even though it says it
> is 7.2?
> 
> I don't want to have to uninstall gcc 8 only to have to reinstall it
> again.

Today gcc-7.3 arrived in sid, which seems to compile the kernel without
problems (see my previous post).

BTW, getting rid of gcc-8 was a bit of a pita, synaptic was no good for
that, had to do
# aptitude remove gcc-8-base
and follow the second suggestion, which fixed that issue here with a few
downgrades to the proper unstable versions. So please be careful what you
are doing in case you want to remove gcc-8.

Regards

Michael


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