Compiler mismatch building `nvidia-kernel-oot` in workspace generated from devtool

[arrow53]

Describe the bug When I build nvidia-kernel-oot in a workspace I get a compiler mismatch. I'm using tegra-demo-distro

The major and minor number of the compiler used to	compile the kernel:
x86_64-linux-gnu-gcc-12 (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0, GNU ld (GNU Binutils for Ubuntu) 2.38

To Reproduce Steps to reproduce the behavior:

1. Build meta-tegra branch 'scarthap' with MACHINE based on 'jetson-orin-nano-devkit'
2. Build with bitbake argument 'devtool modify nvidia-kernel-oot' then bitbake nvidia-kernel-oot

| make[1]: warning: -j0 forced in submake: resetting jobserver mode.
| 
| Warning: Compiler version check failed:
| 
| The major and minor number of the compiler used to
| compile the kernel:
| 
| x86_64-linux-gnu-gcc-12 (Ubuntu 12.3.0-1ubuntu1~22.04) 12.3.0, GNU ld (GNU Binutils for Ubuntu) 2.38
| 
| does not match the compiler used here:
| 
| aarch64-oe4t-linux-gcc (GCC) 13.3.0
| Copyright (C) 2023 Free Software Foundation, Inc.
| This is free software; see the source for copying conditions.  There is NO
| warranty; not even for MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
| 
| 
| It is recommended to set the CC environment variable
| to the compiler that was used to compile the kernel.
| 
| To skip the test and silence this warning message, set
| the IGNORE_CC_MISMATCH environment variable to "1".
| However, mixing compiler versions between the kernel
| and kernel modules can result in subtle bugs that are
| difficult to diagnose.
| 
| *** Failed CC version check. ***

[ichergui]

Hi @arrow53 Could you please elaborate about the change that you are trying to apply in nvidia-kernel-oot ? It builds fine when using scarthap branch

[ichergui]

Thanks @madisongh for the PR. @arrow53 Could you please check with this fix and keep us posted ? I will close this issue based on your feedback

[madisongh]

You can also work around the issue without pulling in this fix by doing a git restore -- Makefile in the devtool workspace, then re-running the build.

[arrow53]

@madisongh your fix did the trick. thanks for the quick turn on this.