On Fri, Oct 30, 2020 at 02:57:23PM -0500, Justin Forbes wrote:
> On Thu, Oct 22, 2020 at 11:54 AM Justin Forbes <[email protected]> wrote:
> >
> > On Thu, Oct 22, 2020 at 11:01 AM Jiri Olsa <[email protected]> wrote:
> > >
> > > On Thu, Oct 22, 2020 at 10:36:01AM -0500, Justin Forbes wrote:
> > > > On Thu, Oct 22, 2020 at 4:39 AM Bastien Nocera <[email protected]>
> > > > wrote:
> > > > >
> > > > >
> > > > >
> > > > > ----- Original Message -----
> > > > > > On Wed, Oct 21, 2020 at 12:27:20PM -0400, Bastien Nocera wrote:
> > > > > > > Hey,
> > > > > > >
> > > > > > > I'm trying to build test kernels on my Fedora 33 machine
> > > > > > > and ran into:
> > > > > > > https://bugzilla.redhat.com/show_bug.cgi?id=1890107
> > > > > > >
> > > > > > > Does anyone know a work-around for this? I tried a "dnf
> > > > > > > downgrade",
> > > > > > > to no avail.
> > > > > >
> > > > > > if your problem is broken dwarf info then I don't have any
> > > > > > workaround, if you can't build kernel because of that, try
> > > > > > to disable CONFIG_DEBUG_INFO_BTF
> > > > >
> > > > > That was the one, thanks!
> > > >
> > > > Interestingly, this seems to be due to a bug introduced in the
> > > > upstream kernel sometime late last week. We had a successful build on
> > > > the 14th with CONFIG_DEBUG_INFO_BTF on, by Monday, this was failing.
> > >
> > > for me it was introduced with recent gcc update to:
> > > $ gcc --version
> > > gcc (GCC) 10.2.1 20201005 (Red Hat 10.2.1-5)
> > >
> >
> > I thought that was the case, so I tried building an older kernel on
> > the newer gcc update and it worked.
> >
>
> This is definitely an upstream kernel regression. I can continue to
> build 5.9.x kernels with CONFIG_DEBUG_INFO_BTF on, but current linus
> tree including 5.10-rc1 fail on the same system.
hi,
what gcc are you using? I just updated gcc to:
[jolsa@dell-r440-01 ~]$ gcc --version
gcc (GCC) 10.2.1 20201016 (Red Hat 10.2.1-6)
and I'm able to build linux 5.10-rc1 again with CONFIG_DEBUG_INFO_BTF=y
jirka
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