Re: [PATCH 2/2] kbuild: rust: keep Rust objects out of Clang LTO with inline helpers

On Sun, Aug 16, 2026 at 03:32:33PM +0200, Miguel Ojeda wrote:
> Another possible alternative that Gary suggested is to turn the flags on
> globally for C, whether only when inline helpers are enabled or in all
> cases, but it may be intended that in C we expect not to generate the
> `unreachable`s.

I am not sure we can use '-mllvm -trap-unreachable' for C code, as that
would mess with manually inserted calls to __builtin_unreachable(). It
has come up before:

  https://lore.kernel.org/CAHk-=wgPCbZv0JgqoNWMOO+p=N772YW16xYk_pmb1GU7aeuPFA@mail.gmail.com/

It is possible the '-no-trap-after-noreturn' avoids that particular
issue but I still think the "compiler inserted" vs. "user inserted"
distinction that Linus comments on is likely still potentially relevant.

-- 
Cheers,
Nathan