linux-kernel - Re: [PATCH 1/2] ARM: Remove '-p' from LDFLAGS

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Message-ID: <d1b55b04ad9f7fe85394aa2036c4ae23@agner.ch>
Date:   Sat, 29 Dec 2018 13:49:23 +0100
From:   Stefan Agner <stefan@...er.ch>
To:     Nathan Chancellor <natechancellor@...il.com>
Cc:     Russell King <linux@...linux.org.uk>,
        linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org,
        Nicolas Pitre <nicolas.pitre@...aro.org>,
        Ard Biesheuvel <ard.biesheuvel@...aro.org>,
        Nick Desaulniers <ndesaulniers@...gle.com>
Subject: Re: [PATCH 1/2] ARM: Remove '-p' from LDFLAGS

On 05.12.2018 02:42, Nathan Chancellor wrote:
> This option is not supported by lld:
> 
>     ld.lld: error: unknown argument: -p
> 
> This has been a no-op in binutils since 2004 (see commit dea514f51da1 in
> that tree). Given that the lowest officially supported of binutils for
> the kernel is 2.20, which was released in 2009, nobody needs this flag
> around so just remove it. Commit 1a381d4a0a9a ("arm64: remove no-op -p
> linker flag") did the same for arm64.
> 
> Signed-off-by: Nathan Chancellor <natechancellor@...il.com>

There is another -p in arch/arm/boot/bootp/Makefile.

With that fixed:

Reviewed-by: Stefan Agner <stefan@...er.ch>

I guess you can send a v2 with this patch only, which then can make it
in. Patch 2 seems to get fixed by adding --pic-veneer support in lld.

--
Stefan

> ---
>  arch/arm/Makefile                 | 2 +-
>  arch/arm/boot/compressed/Makefile | 2 --
>  2 files changed, 1 insertion(+), 3 deletions(-)
> 
> diff --git a/arch/arm/Makefile b/arch/arm/Makefile
> index 05a91d8b89f3..e2a0baf36766 100644
> --- a/arch/arm/Makefile
> +++ b/arch/arm/Makefile
> @@ -10,7 +10,7 @@
>  #
>  # Copyright (C) 1995-2001 by Russell King
>  
> -LDFLAGS_vmlinux	:=-p --no-undefined -X --pic-veneer
> +LDFLAGS_vmlinux	:= --no-undefined -X --pic-veneer
>  ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
>  LDFLAGS_vmlinux	+= --be8
>  KBUILD_LDFLAGS_MODULE	+= --be8
> diff --git a/arch/arm/boot/compressed/Makefile
> b/arch/arm/boot/compressed/Makefile
> index 1f5a5ffe7fcf..dcd07bd24b85 100644
> --- a/arch/arm/boot/compressed/Makefile
> +++ b/arch/arm/boot/compressed/Makefile
> @@ -131,8 +131,6 @@ endif
>  ifeq ($(CONFIG_CPU_ENDIAN_BE8),y)
>  LDFLAGS_vmlinux += --be8
>  endif
> -# ?
> -LDFLAGS_vmlinux += -p
>  # Report unresolved symbol references
>  LDFLAGS_vmlinux += --no-undefined
>  # Delete all temporary local symbols