[Buildroot] nvidia kernel module build fails

[Tal Lubko]

Hi
I'm trying to build nvidia kernel module (BR2_PACKAGE_NVIDIA_DRIVER_MODULE option) but I get the following error:
===Compiler version check failed:
The major and minor number of the compiler used tocompile the kernel:
x86_64-linux-gcc.br_real (Buildroot 2020.08-14-ge5a2a90) 9.3.0, GNU ld (GNU Binutils) 2.33.1
does not match the compiler used here:
x86_64-linux-gcc.br_real (Buildroot 2020.08-14-ge5a2a90) 9.3.0Copyright (C) 2019 Free Software Foundation, Inc.This is free software; see the source for copying conditions.  There is NOwarranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.

It is recommended to set the CC environment variableto the compiler that was used to compile the kernel.
The compiler version check can be disabled by settingthe IGNORE_CC_MISMATCH environment variable to "1".However, mixing compiler versions between the kerneland kernel modules can result in subtle bugs that aredifficult to diagnose.
*** Failed CC version check. Bailing out! ***===

Host machine: Ubuntu 18.04.6Buildroot version: 2021.02.6Target: x86_64 (corei7)
Is this the place for reporting issues?
Regards,Tal
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