[PATCH v1] RISC-V: disallow gcc + rust builds

[Miguel Ojeda]

On Tue, Oct 1, 2024 at 1:28 PM Conor Dooley <conor at kernel.org> wrote:
>
> diff --git a/Documentation/rust/arch-support.rst b/Documentation/rust/arch-support.rst
> index 750ff371570a0..54be7ddf3e57a 100644
> --- a/Documentation/rust/arch-support.rst
> +++ b/Documentation/rust/arch-support.rst
> @@ -17,7 +17,7 @@ Architecture   Level of support  Constraints
>  =============  ================  ==============================================
>  ``arm64``      Maintained        Little Endian only.
>  ``loongarch``  Maintained        \-
> -``riscv``      Maintained        ``riscv64`` only.
> +``riscv``      Maintained        ``riscv64`` and LLVM/Clang only.
>  ``um``         Maintained        \-
>  ``x86``        Maintained        ``x86_64`` only.
>  =============  ================  ==============================================
> diff --git a/arch/riscv/Kconfig b/arch/riscv/Kconfig
> index 22dc5ea4196ce..76843584960c2 100644
> --- a/arch/riscv/Kconfig
> +++ b/arch/riscv/Kconfig
> @@ -177,7 +177,7 @@ config RISCV
>         select HAVE_REGS_AND_STACK_ACCESS_API
>         select HAVE_RETHOOK if !XIP_KERNEL
>         select HAVE_RSEQ
> -       select HAVE_RUST if RUSTC_SUPPORTS_RISCV
> +       select HAVE_RUST if RUSTC_SUPPORTS_RISCV && CC_IS_CLANG
>         select HAVE_SAMPLE_FTRACE_DIRECT
>         select HAVE_SAMPLE_FTRACE_DIRECT_MULTI
>         select HAVE_STACKPROTECTOR

Acked-by: Miguel Ojeda <ojeda at kernel.org>

Cheers,
Miguel