Re: [PATCH] kbuild: rust: add AutoFDO support

[Nathan Chancellor]

On Fri, Mar 20, 2026 at 06:47:05AM +0000, Alice Ryhl wrote:
> How about we just call them:
> 
> * CFLAGS_AUTOFDO_CLANG
> * RUSTFLAGS_AUTOFDO
> 
> then? For cflags, clarify that they are clang flags. For rustc, there is
> no such distinction to make (yet).

Yes, that seems reasonable to me (although CFLAGS_AUTOFDO_CLANG is
already the name so I assume you mean just keeping it as it is).

> Another option:
> * CFLAGS_AUTOFDO_CLANG
> * RUSTFLAGS_AUTOFDO_RUSTC

I don't see much of a reason to make this distinction until the rest of
the kernel's Rust code can be built with a different Rust compiler.

Cheers,
Nathan