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From: Andreas Larsson <andreas@gaisler.com>
To: Rosen Penev <rosenp@gmail.com>, sparclinux@vger.kernel.org
Cc: "David S. Miller" <davem@davemloft.net>,
	Nathan Chancellor <nathan@kernel.org>,
	Nick Desaulniers <nick.desaulniers+lkml@gmail.com>,
	Bill Wendling <morbo@google.com>,
	Justin Stitt <justinstitt@google.com>,
	open list <linux-kernel@vger.kernel.org>,
	"open list:CLANG/LLVM BUILD SUPPORT:Keyword:b(?i:clang|llvm)b"
	<llvm@lists.linux.dev>
Subject: Re: [PATCH] sparc: Disable compat support with LLD
Date: Mon, 15 Jun 2026 10:02:26 +0200	[thread overview]
Message-ID: <eb58c07c-d244-4cb3-95c5-037500569b05@gaisler.com> (raw)
In-Reply-To: <20260508000834.834824-1-rosenp@gmail.com>

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@gmail.com>
> ---
>  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@gaisler.com>

Picking this up to my for-next.

Thanks,
Andreas


      parent reply	other threads:[~2026-06-15  8:02 UTC|newest]

Thread overview: 3+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2026-05-08  0:08 Rosen Penev
2026-05-14 13:00 ` Nathan Chancellor
2026-06-15  8:02 ` Andreas Larsson [this message]

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