From: Nathan Chancellor <nathan@kernel.org>
To: Arnd Bergmann <arnd@arndb.de>
Cc: Christoph Hellwig <hch@lst.de>, Brian Cain <bcain@codeaurora.org>,
Sid Manning <sidneym@codeaurora.org>,
linux-hexagon@vger.kernel.org, linux-kernel@vger.kernel.org,
Nick Desaulniers <ndesaulniers@google.com>,
clang-built-linux@googlegroups.com
Subject: Re: how can we test the hexagon port in mainline
Date: Wed, 23 Jun 2021 21:06:41 -0700 [thread overview]
Message-ID: <YNQE0YJzC2xmWg+2@Ryzen-9-3900X.localdomain> (raw)
In-Reply-To: <CAK8P3a2bG64ARjpwQ0ZhQ9P0g8B-=AwcHHAbYBXBS4B6Fy9pQw@mail.gmail.com>
On Wed, Jun 23, 2021 at 05:35:38PM +0200, Arnd Bergmann wrote:
> On Wed, Jun 23, 2021 at 5:17 PM Christoph Hellwig <hch@lst.de> wrote:
> >
> > It seem like it still isn't complete enought for a kernel build, though:
> >
> > $ export CROSS_COMPILE=/opt/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin/hexagon-unknown-linux-musl-
> > $ make ARCH=hexagon LLVM=1 oldconfig
> > ...
> > scripts/Kconfig.include:40: linker 'ld.lld' not found
>
> I tried this using the prebuilt binaries from apt.llvm.org:
>
> $ make ARCH=hexagon LLVM=1 O=obj-hexagon CROSS_COMPILE=hexagon-linux-
> LLVM_IAS=1 CC=llvm-12 defconfig modules vmlinux
> <stdin>:1515:2: warning: syscall clone3 not implemented [-W#warnings]
> #warning syscall clone3 not implemented
> ^
> 1 warning generated.
>
> Doing the same thing with allmodconfig results in an internal error
> with clang-12
> while compiling kernel/locking/lockdep.c. Same thing with clang-13.
> After turning
> off lock debugging, it seems fine.
I've reported this upstream with you on CC:
https://bugs.llvm.org/show_bug.cgi?id=50838
Christoph, that toolchain should work (I had to install libtinfo5 and
libc++1-7 on Debian Buster):
$ export PATH=$HOME/tmp/clang+llvm-12.0.0-cross-hexagon-unknown-linux-musl/x86_64-linux-gnu/bin:$PATH
$ make -skj"$(nproc)" ARCH=hexagon CROSS_COMPILE=hexagon-unknown-linux-musl LLVM=1 LLVM_IAS=1 defconfig all
CROSS_COMPILE is really only used to set the '--target=' flag when
LLVM=1 LLVM_IAS=1 are used, it can even be just 'hexagon-linux'.
As Arnd points out, https://apt.llvm.org is also an option, that is what
we use in our continuous integration:
https://github.com/ClangBuiltLinux/continuous-integration2
Cheers,
Nathan
next prev parent reply other threads:[~2021-06-24 4:06 UTC|newest]
Thread overview: 14+ messages / expand[flat|nested] mbox.gz Atom feed top
2021-06-23 14:18 how can we test the hexagon port in mainline Christoph Hellwig
2021-06-23 14:39 ` Brian Cain
2021-06-23 14:53 ` Arnd Bergmann
2021-06-23 15:15 ` Brian Cain
2021-06-23 15:17 ` 'Christoph Hellwig'
2021-06-23 15:35 ` Arnd Bergmann
2021-06-24 4:06 ` Nathan Chancellor [this message]
2021-07-07 14:10 ` Christoph Hellwig
2021-07-07 17:42 ` Nathan Chancellor
2021-07-08 5:27 ` Christoph Hellwig
2021-07-08 17:54 ` Nick Desaulniers
2021-07-08 18:35 ` Brian Cain
2021-07-08 19:08 ` Nick Desaulniers
2021-06-23 15:10 ` 'Christoph Hellwig'
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