linux-kernel - Re: [PATCH] powerpc/boot: Fix build with gcc 15

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Message-ID: <fo7xb3bqk5h57mqgfrnyfpweitkr2l5vk3tomu6zgxgqlivwpt@afm2n3c2sxke>
Date: Thu, 17 Apr 2025 11:37:09 +0530
From: Mukesh Kumar Chaurasiya <mchauras@...ux.ibm.com>
To: Michal Suchanek <msuchanek@...e.de>
Cc: linuxppc-dev@...ts.ozlabs.org, Madhavan Srinivasan <maddy@...ux.ibm.com>,
        Michael Ellerman <mpe@...erman.id.au>,
        Nicholas Piggin <npiggin@...il.com>,
        Christophe Leroy <christophe.leroy@...roup.eu>,
        Naveen N Rao <naveen@...nel.org>,
        Masahiro Yamada <masahiroy@...nel.org>,
        Nicolas Schier <nicolas@...sle.eu>,
        Bjorn Helgaas <bhelgaas@...gle.com>, linux-kernel@...r.kernel.org
Subject: Re: [PATCH] powerpc/boot: Fix build with gcc 15

On Fri, Mar 07, 2025 at 10:20:52AM +0100, Michal Suchanek wrote:
> Similar to x86 the ppc boot code does not build with GCC 15.
> 
> Copy the fix from
> commit ee2ab467bddf ("x86/boot: Use '-std=gnu11' to fix build with GCC 15")
> 
> Signed-off-by: Michal Suchanek <msuchanek@...e.de>
> ---
>  arch/powerpc/boot/Makefile | 1 +
>  1 file changed, 1 insertion(+)
> 
> diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
> index 1ff6ad4f6cd2..e6b35699c049 100644
> --- a/arch/powerpc/boot/Makefile
> +++ b/arch/powerpc/boot/Makefile
> @@ -33,6 +33,7 @@ else
>  endif
>  
>  ifdef CONFIG_PPC64_BOOT_WRAPPER
> +BOOTTARGETFLAGS	+= -std=gnu11
>  BOOTTARGETFLAGS	+= -m64
>  BOOTTARGETFLAGS	+= -mabi=elfv2
>  ifdef CONFIG_PPC64_ELF_ABI_V2
> -- 
> 2.47.1
> 
There's another patch which fixes this problem by version comparison.
https://lore.kernel.org/all/20250323163607.537270-2-misanjum@linux.ibm.com/

In my opinion this is a better solution as it will use the features of latest
compiler.