linux-kernel - Re: [build fail] v6.11-rc2 from "ARM: 9404/1: arm32: enable HAVE_LD_DEAD_CODE_DATA

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Message-ID: <0c725174-d67d-47f2-bd4b-29af8b8d6b1c@gmail.com>
Date: Wed, 7 Aug 2024 16:51:34 +0530
From: Harith George <mail2hgg@...il.com>
To: Arnd Bergmann <arnd@...db.de>, Yuntao Liu <liuyuntao12@...wei.com>,
 Linus Walleij <linus.walleij@...aro.org>,
 Russell King <rmk+kernel@...linux.org.uk>, Ard Biesheuvel <ardb@...nel.org>,
 harith.g@...fsemi.com
Cc: linux-arm-kernel@...ts.infradead.org, linux-kernel@...r.kernel.org
Subject: Re: [build fail] v6.11-rc2 from "ARM: 9404/1: arm32: enable
 HAVE_LD_DEAD_CODE_DATA_ELIMINATION"



On 07-08-2024 15:40, Arnd Bergmann wrote:
> Obviously 'ld' should not segfault, so there is at least one bug
> there, possibly also a kernel bug that triggered this. Can you
> try with newer binutils? This should hopefully either solve your
> problem or produce a more useful error message if there is still a
> kernel problem.
> 
> Any of the binary toolchains below should work in general,
> the latest one is the gcc-14.2/binutils-2.43 version I uploaded
> to kernel.org the other day.

So, I tested with 3 more gcc builds.

gcc14.2 (x86_64-gcc-14.2.0-nolibc-arm-linux-gnueabi.tar.xz) and gcc9.5 
(x86_64-gcc-9.5.0-nolibc-arm-linux-gnueabi.tar.xz) from 
https://mirrors.edge.kernel.org/pub/tools/crosstool/index.html
works and in both these ld does not segfault and build completes.

But gcc9.3 (armv7-eabihf--musl--stable-2020.08-1.tar.bz2) from 
(https://toolchains.bootlin.com/releases_armv7-eabihf.html) resulted in 
the same LD segfault below.

+ arm-buildroot-linux-musleabihf-ld -EL -z noexecstack --no-undefined -X 
--pic-veneer -z norelro --build-id=sha1 --orphan-handling=warn 
--script=./arch/arm/kernel/vmlinux.lds --strip-debug -o .tmp_vmlinux1 
--whole-archive vmlinux.a init/version-timestamp.o --no-whole-archive 
--start-group arch/arm/lib/lib.a lib/lib.a --end-group 
.tmp_vmlinux0.kallsyms.o
scripts/link-vmlinux.sh: line 49: 3802905 Segmentation fault      ${ld} 
${ldflags} -o ${output} ${wl}--whole-archive ${objs} 
${wl}--no-whole-archive ${wl}--start-group ${libs} ${wl}--end-group 
${kallsymso} ${btf_vmlinux_bin_o} ${ldlibs}
make[2]: *** [scripts/Makefile.vmlinux:34: vmlinux] Error 139
make[1]: *** [/home/amol/hgg/mainline/linux/Makefile:1156: vmlinux] Error 2


Thanks,
Warm Regards,
Harith