gcc 10.0.1 20200506 build fails to compile linux kernel

[Tetsuji Rai]

Hi Martin,

Thank you for your reply!

Spot on!

It was my kernel config problem associated with stronger stack
protection of gcc-10, not a gcc problem.  But I can't find this in
kernel.org bugzilla or bugzilla.redhat.com (searched with "gcc 10" and
"gcc-10".)

It happens not in qemu or any VM, but on a native machine.  As in
https://bugzilla.redhat.com/show_bug.cgi?id=1796780 (this is the first
url in the page you mentioned), turning CONFIG_STACKPROTECTOR_STRONG
off, lo and behold, the kernel works perfectly!! And as a matter of
course, it works for the latest kernel 5.6.11 also.

My problem was that I brought my custom kernel config file from Fedora
31 with gcc-9.   I should have started from the prototype config file
/boot/config-5.6.8-300.fc32.x86_64, where CONFIG_STACKPROTECTOR_STRONG
is off for its native gcc.

Thank you very much!!

-Tetsuji

On 5/6/20 4:19 PM, Martin Liška wrote:
> On 5/6/20 6:44 AM, Tetsuji Rai via Gcc wrote:
>> I wonder how Fedora project built its own kernel.  I can't build custom
>> kernel with it.
>>
>> What's wrong with 10.1-RC or how can I report my problem?
>
> Hi.
>
> Is it possible that you reached
> https://lore.kernel.org/lkml/20200417190607.GY2424@tucnak/T/ ?
>
> I can try to reproduce that but please file a bug at or bugzilla and
> provide
> steps how to reproduce the issue. Can you also reproduce it within a
> qemu VM?
>
> Thanks,
> Martin