[Buildroot] [autobuild.buildroot.net] Build results for 2019-05-08

[Giulio Benetti]

Hi Yann,

Il 14/05/2019 22:36, Yann E. MORIN ha scritto:
> Giulio, All,
> 
> On 2019-05-11 23:00 +0200, Giulio Benetti spake thusly:
>> Hello Yann, All,
>>
>> Il 09/05/2019 23:19, Giulio Benetti ha scritto:
>>>>>        aarch64 |            python-numpy-1.16.3 | NOK | http://autobuild.buildroot.net/results/50f7f09a9f830cd7b94f8fc83c09fc3d39297d3d |
>>>>
>>>> /home/buildroot/autobuild/run/instance-2/output/host/bin/aarch64-linux-gnu-gcc /tmp/tmph865w02v/tmp/tmph865w02v/source.o -L/home/buildroot/autobuild/run/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib -lcblas -o /tmp/tmph865w02v/a.out
>>>> /home/buildroot/autobuild/run/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib/libcblas.so: undefined reference to `scnrm2_'
>>>> /home/buildroot/autobuild/run/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib/libcblas.so: undefined reference to `scasum_'
>>>> collect2: error: ld returned 1 exit status
>>>> /home/buildroot/autobuild/run/instance-2/output/host/bin/aarch64-linux-gnu-gcc /tmp/tmph865w02v/tmp/tmph865w02v/source.o -L/home/buildroot/autobuild/run/instance-2/output/host/aarch64-buildroot-linux-gnu/sysroot/usr/lib -lblas -o /tmp/tmph865w02v/a.out
>>>> /tmp/tmph865w02v/tmp/tmph865w02v/source.o: In function `main':
>>>> /tmp/tmph865w02v/source.c:6: undefined reference to `cblas_ddot'
>>>> collect2: error: ld returned 1 exit status
>>>>
>>>> I'm not sure what's going on here. Sadly, Samuel who was maintaining
>>>> python-numpy, is no longer active in Buildroot. Is there anyone else
>>>> volunteering to have a look ?
>>>
>>> I can try to work this out.
>>>
>>
>> As spoken in IRC this builds correctly with every Docker in Adam Duskett:
>> https://github.com/aduskett/buildroot-docker-devel
>>
>> included Ubuntu 14.04(Trusty), the same as Yann's Autobuilder.
>>
>> I'm waiting for Yann to report if it works for him too or not.
> 
> Here is a quick summary of Giulio's and my findings:
> 
> Usign the configuration from the failed autobuild job:
> 
>    - make clean; make python-numpy    --> builds OK
> 
>    - make clean; make   --> fails to build
> 
> The root cause is a hidden dependency on lapack. When lapack is build
> before python-numpy (which is highly possible, because of alphabetical
> ordering), then python-numpy detects it and fails to build properly in
> this case.
> 
> So, I can see two solutions:
> 
>    - add an explicit, conditional dependency on lapack, and fix the
>      build,
> 
>    - explicitly tell python-numpy to never use lapack.
> 
> Obviously, the first would be preferred, but it's probably non-trivial.

I would go for the first one, but before I need to solve microblaze 
toolchain bug 85180 impact.
It depends on expected time.
I'd hope to fix both for this week, but I can't assure.

-- 
Giulio Benetti
CTO

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> Regards,
> Yann E. MORIN.
>