From: Nathan Chancellor <nathan@kernel.org>
To: Arnd Bergmann <arnd@kernel.org>
Cc: Catalin Marinas <catalin.marinas@arm.com>,
Will Deacon <will@kernel.org>,
Linux ARM <linux-arm-kernel@lists.infradead.org>,
"linux-kernel@vger.kernel.org" <linux-kernel@vger.kernel.org>,
Nick Desaulniers <ndesaulniers@google.com>,
clang-built-linux <clang-built-linux@googlegroups.com>,
Arnd Bergmann <arnd@arndb.de>
Subject: Re: [PATCH] arm64: Make CPU_BIG_ENDIAN depend on !LD_IS_LLD
Date: Tue, 2 Feb 2021 12:51:33 -0700 [thread overview]
Message-ID: <20210202195133.GA1481999@localhost> (raw)
In-Reply-To: <CAK8P3a2864oSVkhaYynoadyYMcYDh0LvDDFSJ2D8OTHSszuSQA@mail.gmail.com>
On Tue, Feb 02, 2021 at 09:04:34AM +0100, Arnd Bergmann wrote:
> On Tue, Feb 2, 2021 at 3:25 AM Nathan Chancellor <nathan@kernel.org> wrote:
> >
> > Similar to commit 28187dc8ebd9 ("ARM: 9025/1: Kconfig: CPU_BIG_ENDIAN
> > depends on !LD_IS_LLD"), ld.lld does not support aarch64 big endian,
> > leading to the following build error when CONFIG_CPU_BIG_ENDIAN is
> > selected:
> >
> > ld.lld: error: unknown emulation: aarch64linuxb
>
> While this is the original error message I reported, I think it would be
> better to explain that lld actually does support linking big-endian
> kernels but they don't boot, for unknown reasons.
That statement seems to contradict what Peter Smith says:
https://github.com/ClangBuiltLinux/linux/issues/1288#issuecomment-770693582
https://reviews.llvm.org/D58655#1410282
> I can send a patch to address the build error and mark big-endian
> as "depends on !LD_IS_LLD || COMPILE_TEST" to reflect that
> and help with randconfig testing.
I have no strong opinion on handling this though.
Cheers,
Nathan
next prev parent reply other threads:[~2021-02-02 19:53 UTC|newest]
Thread overview: 9+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-02-02 2:24 [PATCH] arm64: Make CPU_BIG_ENDIAN depend on !LD_IS_LLD Nathan Chancellor
2021-02-02 8:04 ` Arnd Bergmann
2021-02-02 19:51 ` Nathan Chancellor [this message]
2021-02-02 20:43 ` Arnd Bergmann
2021-02-03 10:08 ` Peter Smith
2021-02-07 2:30 ` Nathan Chancellor
2021-02-09 0:57 ` [PATCH v2] arm64: Make CPU_BIG_ENDIAN depend on ld.bfd or ld.lld 13.0.0+ Nathan Chancellor
2021-02-09 1:39 ` Nick Desaulniers
2021-02-09 14:35 ` Will Deacon
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