Re: [Quantlib-users] Build quantlib wheel using Docker

[Alix L. <ali...@gm...>]

Thanks Luigi for your help. This is exactly what I needed. Running
`configure` with `--disable-shared` works fine, but I had to add the flag
'-fPIC' in the same time. Otherwise, the swig compilation fails. I will
also give a look to manylinux, which looks a better practice, thanks again.

I have originally tried to build your dockerfiles on a 64bit Windows
machine, and I noticed the swig compilation took hours -while the
compilation directly on the host machine would take ~1h. Have you ever
faced this sort of slowness? I remember having facing similar issues when
trying to compile QuantLib Excel in 64bits, while it was fine in 32bits.

I also noticed the PyQL project tackle this "issue" by relying on Cython,
so that they can use parallelization (but I never tried). I don't know if
there exists any workaround with swig (maybe except adding additional flag
to the compiler to remove extra optimisation).

Alix

Le lun. 10 mai 2021 à 09:14, Luigi Ballabio <lui...@gm...> a
écrit :

> Hello Alix,
>     I'm not sure that `auditwheel repair` works outside the manylinux
> images.  Personally I'm using the `quay.io/pypa/manylinux2010_x86_64`
> <http://quay.io/pypa/manylinux2010_x86_64> image to build the QuantLib
> wheels on PyPI (used to be `quay.io/pypa/manylinux1_x86_64`
> <http://quay.io/pypa/manylinux1_x86_64>, but since the latest release we
> need a C++11 compiler so I upgraded).  If you want to distribute to users
> on a given Ubuntu version, I'd probably distribute both the wheel
> (unrepaired) and the shared library.  If you want a self-contained wheel,
> another possibility (which I have done on Mac OS, but not on Linux so I
> can't guarantee it works) might be to run `configure` with
> `--disable-shared`, so it only creates the static library.  This way, the
> library code would be linked in the wrappers instead of being a dependency.
>
> Hope this helps,
>     Luigi
>
>
>
>
>
> On Sat, May 8, 2021 at 4:21 PM Alix Lassauzet <ali...@gm...>
> wrote:
>
>> Hello Luigi and QL community,
>>
>> I am actually stuck in the process of building properly a wheel in
>> QuantLib-Python from docker. In short, I am starting from Luigi's
>> repository (https://github.com/lballabio/dockerfiles), then building the
>> images boost, base, default and python3. At this point, one can use
>> QuantLib-Python.
>>
>> Then, I tried to run "python3 setup.py bdist_wheel" to generate a wheel.
>> And "repair" the wheel using auditwheel, I am facing this error:
>>
>> auditwheel: error: cannot repair "QuantLib******.whl" to
>> "manylinux1_x86_64" ABI because of the presence of too-recent versioned
>> symbols. You'll need to compile the wheel on an older toolchain.
>>
>> I have seen a discussion where Luigi mentioned to use manylinux for
>> building a wheel. Does it mean we cannot generate a wheel from an
>> Ubunbu distribution? If my understanding is correct, manylinux will provide
>> wheels for any linux distribution, and looks the best practice to
>> industrialise the release process. But what about if we don't care about
>> the Linux distrib, and just want to build a wheel for this Ubuntu version,
>> assuming users are required to use the same environment? The concern here
>> seems to link the external shared library "libQuantLib.so.0".
>>
>> Many thanks to all,
>> Alix
>>
>> Attaching the 2 earlier discussions that look related to this topic for
>> reference:
>> https://sourceforge.net/p/quantlib/mailman/message/36713117/
>> https://github.com/lballabio/QuantLib-SWIG/issues/103
>>
>>
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