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Subject: Re: how can we test the hexagon port in mainline
To:     Christoph Hellwig <hch@lst.de>, Brian Cain <bcain@codeaurora.org>,
        Sid Manning <sidneym@codeaurora.org>
Cc:     Arnd Bergmann <arnd@arndb.de>, linux-hexagon@vger.kernel.org,
        linux-kernel@vger.kernel.org,
        Nick Desaulniers <ndesaulniers@google.com>,
        clang-built-linux@googlegroups.com
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From:   Nathan Chancellor <nathan@kernel.org>
Message-ID: <1ee8fc44-3e8c-91c0-7909-a636757dbda4@kernel.org>
Date:   Wed, 7 Jul 2021 10:42:27 -0700
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Hi Christoph,

On 7/7/2021 7:10 AM, Christoph Hellwig wrote:
> On Wed, Jun 23, 2021 at 09:06:41PM -0700, Nathan Chancellor wrote:
>> I've reported this upstream with you on CC:
>>
>> https://bugs.llvm.org/show_bug.cgi?id=50838
> 
> I've not actually got any mail from that Cc..

Sorry, I directed that at Arnd. I should have kept you in the loop too.

>> 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"$(nproc)" ARCH=hexagon CROSS_COMPILE=hexagon-unknown-linux-musl LLVM=1 LLVM_IAS=1 defconfig all
> 
> hch@brick:~/work/linux$ make -j4 ARCH=hexagon
> CROSS_COMPILE=hexagon-unknown-linux-musl LLVM=1 LLVM_IAS=1 defconfig all
> HOSTCC  scripts/basic/fixdep
> clang: error while loading shared libraries: libtinfo.so.5: cannot open shared object file: No such file or directory

Hmmm, is that with libtinfo5 installed (or whatever the ncurses-compat 
equivalent is on your distribution installed)? I had that problem on 
Debian until I insta

Brian/Sid, it might be worth flipping LLVM_ENABLE_TERMINFO to OFF during 
your cmake configuration so that there are less dynamic dependencies and 
it is easier for more people to run the toolchain. Android's clang team 
did the same thing:

https://github.com/android/ndk/issues/574

With https://reviews.llvm.org/D42055, there should not be too much of a 
sacrifice.

Cheers,
Nathan