Error building kernel extension on Xcode 13.3.1

I have just installed the latest Xcode (13.3.1) and am finding that when I attempt to build a kernel extension (which was compiling fine in 13.2.1) I encounter the following error:

 error: use of undeclared identifier '__APPLE_CC__'

This appears to be inside an auto-generated file named <TargetName>_info.c, located in ../Intermediates.noindex/<ProjectName>.build/Debug/<TargetName>.build/DerivedSources/

I couldn't see any reference to this change in the release notes for Xcode 13.3 or 13.3.1.

From some reading it appears that __APPLE_CC__ is related to a C compiler version.

Has anyone else encountered this or know whether this is a bug, or part of the deprecation of kernel extensions?

Many thanks

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The first step in debugging problems like this is to determine whether the issue is tied to your environment or your project. If you create a new project from one of the built-in templates — macOS > Generic Kernel Extension or macOS > IOKit Driver, depending on what type of KEXT you’re working on — does it have the same issue?

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