Re: [PATCH] sparc: Disable compat support with LLD

[Andreas Larsson]

On 2026-05-08 02:08, Rosen Penev wrote:
> An LLVM=1 sparc64 allmodconfig enables COMPAT and then tries to
> build the 32-bit vDSO. That path cannot be linked with ld.lld:
> 
>   ld.lld: error: unknown emulation: elf32_sparc
> 
> ld.lld does not support the 32-bit SPARC ELF emulation used for
> the compat vDSO, so keep COMPAT disabled when LLD is the linker.
> This avoids selecting an unsupported build path while leaving the
> existing GNU ld configuration unchanged.
> 
> Assisted-by: Codex:GPT-5.5
> Signed-off-by: Rosen Penev <rosenp@xxxxxxxxx>
> ---
>  arch/sparc/Kconfig | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/sparc/Kconfig b/arch/sparc/Kconfig
> index a6b787efc2c4..681ab2fd3d8a 100644
> --- a/arch/sparc/Kconfig
> +++ b/arch/sparc/Kconfig
> @@ -474,6 +474,7 @@ endmenu
>  config COMPAT
>  	bool
>  	depends on SPARC64
> +	depends on !LD_IS_LLD
>  	default y
>  	select HAVE_UID16
>  	select ARCH_WANT_OLD_COMPAT_IPC

Reviewed-by: Andreas Larsson <andreas@xxxxxxxxxxx>

Picking this up to my for-next.

Thanks,
Andreas