[Quantlib-users] Fwd: Seeking help with Quantlib Installation on Lubuntu 24.04 LTS

[Aniket B. <ani...@gm...>]

Hello all,

I am a newbie here. I tried compiling the wheel for QuantLib-Python on my
machine under lubuntu 24.04 lts, but failed multiple times. Ultimately, I
had to make do with a precompiled wheel. I am pasting below my conversation
with Dr Luigi Ballabio, who advised me to post it to the group for common
benefit. If anyone has any idea why this is not working, please advise.

Thanks in advance,

Cheers,

Aniket

---------- Forwarded message ---------
From: Aniket Basu <ani...@gm...>
Date: Fri, 7 Mar 2025 at 00:08
Subject: Re: Seeking help with Quantlib Installation on Lubuntu 24.04 LTS
To: Luigi Ballabio <lui...@gm...>


Ok, I will do that tomorrow morning. It's 12 midnight here and I am late
for dinner.

Somehow on my computer I am failing to build the wheel. I finally used the
wheel from PyPI.

Thanks.

On Fri, 7 Mar 2025 at 00:05, Luigi Ballabio <lui...@gm...>
wrote:

> May I ask you to post the question on the QuantLib mailing list, at <
> qua...@li...>? This way it will be useful to
> others, as well.
>
> Thanks,
>      Luigi
>
> Il Gio 6 Mar 2025, 19:18 Aniket Basu <ani...@gm...> ha scritto:
>
>> Actually the compilation seems to fail at the line:
>>
>> #include <ql/version.hpp>
>>
>> I beg your pardon, should there be a space between #include and
>> <ql/version.hpp> ?
>>
>> I can see no reason why the compiler/interpreter cannot locate
>> ql/version.hpp when it is very much there in the system.
>>
>>
>>
>> On Thu, 6 Mar 2025 at 21:51, Luigi Ballabio <lui...@gm...>
>> wrote:
>>
>>> I know (you did mention the Python instructions in your mail), but
>>> building the Python version requires the C++ version to be built and
>>> installed.  I think the instructions mention it.
>>>
>>> This said, if you don't mean to modify the C++ library or the wrappers,
>>> you don't need to build the Python module (or the C++ one).  You can
>>> install a precompiled wheel from PyPI; the page you linked has instructions
>>> for this, as well.
>>>
>>> Hope this helps,
>>>     Luigi
>>>
>>>
>>> On Thu, Mar 6, 2025 at 5:16 PM Aniket Basu <ani...@gm...>
>>> wrote:
>>>
>>>> Sorry, I should have been more specific:
>>>>
>>>> I meant the QuantLib-Python, not the C++ version.
>>>>
>>>> Sorry for bugging you.
>>>>
>>>> On Thu, 6 Mar 2025 at 21:32, Luigi Ballabio <lui...@gm...>
>>>> wrote:
>>>>
>>>>> Hello,
>>>>>     please check that you followed the instructions at <
>>>>> https://www.quantlib.org/install/linux.shtml> to build and also
>>>>> install the library before trying to build the Python module.
>>>>>
>>>>> If the error still occurs, may I ask you to post the question on the
>>>>> QuantLib mailing list, at <qua...@li...>?
>>>>> This way it will be useful to others, as well.
>>>>>
>>>>> Thanks,
>>>>>      Luigi
>>>>>
>>>>>
>>>>>
>>>>>
>>>>> On Thu, Mar 6, 2025 at 4:42 PM Aniket Basu <ani...@gm...>
>>>>> wrote:
>>>>>
>>>>>> Dear Dr Ballabio,
>>>>>>
>>>>>> While following the instructions here
>>>>>>
>>>>>> https://www.quantlib.org/install/linux-python.shtml
>>>>>>
>>>>>> once I run the command
>>>>>>
>>>>>> make
>>>>>>
>>>>>> under the Python directory, I get the following error messages:
>>>>>>
>>>>>> src/QuantLib/quantlib_wrap.cpp:5526:10: fatal error: ql/version.hpp:
>>>>>> No such file or directory
>>>>>>  5526 | #include <ql/version.hpp>
>>>>>>       |          ^~~~~~~~~~~~~~~~
>>>>>> compilation terminated.
>>>>>> error: command '/usr/bin/g++' failed with exit code 1
>>>>>>
>>>>>> ERROR Backend subprocess exited when trying to invoke build_wheel
>>>>>> make[1]: *** [Makefile:446: .build-stamp] Error 1
>>>>>> make[1]: Leaving directory '/home/aniket/QuantLib-SWIG-1.36/Python'
>>>>>> make: *** [Makefile:237: all] Error 2
>>>>>>
>>>>>> Please advise on how to proceed.
>>>>>>
>>>>>> Looking forward to hearing from you,
>>>>>>
>>>>>> Sincerely,
>>>>>>
>>>>>> Aniket Basu
>>>>>> Assistant Professor
>>>>>> Department of Physics
>>>>>> Vidyasagar College
>>>>>> Kolkata
>>>>>>
>>>>>> Email: ani...@gm...
>>>>>>
>>>>>