Re: [PATCH v2] Fail the build on RUST=y and RUST_IS_AVAILABLE=n

[Gary Guo]

On Thu May 21, 2026 at 9:30 AM BST, Sasha Finkelstein wrote:
> The current approach of silently disabling all rust drivers if the
> toolchain is missing results in users that try to compile their own
> kernels getting a "successful" build and then being confused about where
> did their drivers go. In comparison, missing openssl results in a build
> failure, not a disappearance of everything that depends on it.
> 
> This also means that allyesconfig will depend on rust, but since the
> rust experiment concluded with "rust is here to stay", i believe that
> allyesconfig should be building rust drivers too.
> 
> Signed-off-by: Sasha Finkelstein <k@xxxxxxxxxxxxxx>

Reviewed-by: Gary Guo <gary@xxxxxxxxxxx>

> ---
> Changes in v2:
> - No longer a RFC, let's make it happen.
> - Update the docs.
> - Link to v1: https://patch.msgid.link/20260510-evolve-to-crab-v1-1-208df84e67be@xxxxxxxxxxxxxx
> ---
>  Documentation/rust/quick-start.rst | 6 +++---
>  init/Kconfig                       | 1 -
>  2 files changed, 3 insertions(+), 4 deletions(-)