MaskRay added a comment.

> This patch is required so that we can still use kconfig in such BPF programs 
> compiled from C++.

Assuming that you mean 
https://www.kernel.org/doc/html/next/kbuild/kconfig-language.html#kconfig-language
 , how is Kconfig relevant here?

Clang BPF supports `-mcpu=v[123]`. v1 is for a very old kernel. 
https://pchaigno.github.io/bpf/2021/10/20/ebpf-instruction-sets.html 
I think there are some users so we cannot remove the support. Is it happy with 
the new behavior?


Repository:
  rG LLVM Github Monorepo

CHANGES SINCE LAST ACTION
  https://reviews.llvm.org/D153898/new/

https://reviews.llvm.org/D153898

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