linux-kernel - Re: [PATCH v3] powerpc/boot: Fix build with gcc 15

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Message-ID: <20250505174145.5f1837bc-d8-amachhiw@linux.ibm.com>
Date: Mon, 5 May 2025 17:44:13 +0530
From: Amit Machhiwal <amachhiw@...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>, Bjorn Helgaas <bhelgaas@...gle.com>,
        Masahiro Yamada <masahiroy@...nel.org>, linux-kernel@...r.kernel.org,
        "Nysal Jan K.A." <nysal@...ux.ibm.com>
Subject: Re: [PATCH v3] powerpc/boot: Fix build with gcc 15

On 2025/03/31 12:57 PM, 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>
> ---
> v2: Move the fix outside of ifdef to apply to all subarchitectures
> v3: Change BOOTCFLAGS rather than BOOTTARGETFLAGS
> ---
>  arch/powerpc/boot/Makefile | 1 +
>  1 file changed, 1 insertion(+)

Compile-tested this patch with uptream Linux on fc42. This fixes the build
errors with GCC 15. Hence,

Tested-by: Amit Machhiwal <amachhiw@...ux.ibm.com>

Thanks,
Amit

> diff --git a/arch/powerpc/boot/Makefile b/arch/powerpc/boot/Makefile
> index 184d0680e661..a7ab087d412c 100644
> --- a/arch/powerpc/boot/Makefile
> +++ b/arch/powerpc/boot/Makefile
> @@ -70,6 +70,7 @@ BOOTCPPFLAGS	:= -nostdinc $(LINUXINCLUDE)
>  BOOTCPPFLAGS	+= -isystem $(shell $(BOOTCC) -print-file-name=include)
>  
>  BOOTCFLAGS	:= $(BOOTTARGETFLAGS) \
> +		   -std=gnu11 \
>  		   -Wall -Wundef -Wstrict-prototypes -Wno-trigraphs \
>  		   -fno-strict-aliasing -O2 \
>  		   -msoft-float -mno-altivec -mno-vsx \
> -- 
> 2.47.1
> 
>