Re: [Quantlib-users] Issue building QuantLib-SWIG-1.36

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Hi Luigi, 

I installed a new version of python compiled for arm and also installed via the wheel as suggested and now QuantLib is importing correctly. Thanks for your help!! 

Best
Matthew 

> On Nov 4, 2024, at 9:14 AM, Luigi Ballabio <lui...@gm...> wrote:
> 
> Hi, there might be a couple of things you can try.
> 
> The first is checking if the problem is the mismatch between x86 and arm: is the Python coming with Anaconda compiled for x86? If so, and if you can't upgrade to a version for arm, you can try cross-compiling QuantLib for x86 so it matches the architecture.  Running
> 
> ./configure --with-boost-include=/opt/homebrew/include/ \
>             --prefix=${HOME}/Documents/QuantLib-1.36_build --disable-shared \
>             CXXFLAGS='-O2 -stdlib=libc++ -mmacosx-version-min=10.9 -arch x86_64' \
>             LDFLAGS='-stdlib=libc++ -mmacosx-version-min=10.9 -arch x86_64’
> 
> should do that.
> 
> The second thing is to try to build a wheel instead, and install that.  As of 1.36, the commands would be
> 
> cd QuantLib-SWIG-1.36
> ./configure \
>     CXXFLAGS='-O2 -stdlib=libc++ -mmacosx-version-min=10.9’ \
>     LDFLAGS='-stdlib=libc++ -mmacosx-version-min=10.9’ \
>     PYTHON=/Users/matthew/opt/anaconda3/envs/py39/bin/python3
> make -C Python
> 
> To make it work, you might have to `pip install build` in your environment, or whatever conda requires to install modules.
> When the make step completes, you should have a QuantLib wheel in QuantLib-SWIG-1.36/Python/dist that you can try installing with pip or conda instead of running "python setup.py install" (that I don't trust a lot).
> 
> Let me know how it goes.
> 
> Luigi
> 
> 
> 
> On Mon, Nov 4, 2024 at 3:06 PM Matthew Hancock <mat...@gm... <mailto:mat...@gm...>> wrote:
>> Hi Luigi, 
>> 
>> Thanks for your response. I am attempting to build QuantLib myself to turn on higher-resolution dates for intraday analysis. 
>> 
>> Here are the commands I am using to build QuantLib: 
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 Documents % tar xzvf QuantLib-1.36.tar.gz
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 Documents % cd QuantLib-1.36
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 QuantLib-1.36 % ./configure --with-boost-include=/opt/homebrew/include/ \
>>             --prefix=${HOME}/Documents/QuantLib-1.36_build --disable-shared \
>>             CXXFLAGS='-O2 -stdlib=libc++ -mmacosx-version-min=10.9' \
>>             LDFLAGS='-stdlib=libc++ -mmacosx-version-min=10.9’
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 QuantLib-1.36 % make -j8
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 QuantLib-1.36 % make install
>> 
>> I can compile and run the C++ examples successfully. 
>> 
>> I then try and build QuantLib-SWIG-1.36: 
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 Documents % tar xzf QuantLib-SWIG-1.36.tar.gz
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 Documents % cd QuantLib-SWIG-1.36/Python 
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 QuantLib-SWIG-1.36 % export CXXFLAGS='-O2 -stdlib=libc++ -mmacosx-version-min=10.9’
>> 
>> (base) matthew@Matthews-MacBook-Pro-5 QuantLib-SWIG-1.36 % export LDFLAGS='-stdlib=libc++ -mmacosx-version-min=10.9’
>> 
>> Here I am using a conda python39 environment to build/install: 
>> 
>> (py39) matthew@Matthews-MacBook-Pro-5 Python % /Users/matthew/opt/anaconda3/envs/py39/bin/python3 setup.py build
>> 
>> This generates some warnings related to compatibility between arm and x86 (I’m building on M1): 
>> 
>> running build
>> running build_py
>> creating build/lib.macosx-10.15-x86_64-cpython-39/QuantLib
>> copying src/QuantLib/__init__.py -> build/lib.macosx-10.15-x86_64-cpython-39/QuantLib
>> copying src/QuantLib/QuantLib.py -> build/lib.macosx-10.15-x86_64-cpython-39/QuantLib
>> running build_ext
>> building 'QuantLib._QuantLib' extension
>> creating build/temp.macosx-10.15-x86_64-cpython-39/src/QuantLib
>> clang++ -O2 -stdlib=libc++ -mmacosx-version-min=10.9 -DPy_LIMITED_API=0x03080000 -DNDEBUG -I/Users/matthew/Documents/QuantLib-1.36_build/include -I/Users/matthew/opt/anaconda3/envs/py39/include/python3.9 -c src/QuantLib/quantlib_wrap.cpp -o build/temp.macosx-10.15-x86_64-cpython-39/src/QuantLib/quantlib_wrap.o -std=c++17 -Wno-unused -O2 -stdlib=libc++ -mmacosx-version-min=10.9
>> clang++ -O2 -stdlib=libc++ -mmacosx-version-min=10.9 -bundle -undefined dynamic_lookup -stdlib=libc++ -mmacosx-version-min=10.9 -O2 -stdlib=libc++ -mmacosx-version-min=10.9 build/temp.macosx-10.15-x86_64-cpython-39/src/QuantLib/quantlib_wrap.o -L/Users/matthew/Documents/QuantLib-1.36_build/lib -lQuantLib -o build/lib.macosx-10.15-x86_64-cpython-39/QuantLib/_QuantLib.abi3.so <http://quantlib.abi3.so/> -stdlib=libc++ -mmacosx-version-min=10.9
>> ld: warning: ignoring file /Users/matthew/Documents/QuantLib-1.36_build/lib/libQuantLib.a, building for macOS-x86_64 but attempting to link with file built for macOS-arm64
>> 
>> (py39) matthew@Matthews-MacBook-Pro-5 Python % /Users/matthew/opt/anaconda3/envs/py39/bin/python3 setup.py install
>> 
>> This appears to run successfully (though the package name contains x86): 
>> 
>> Installed /Users/matthew/opt/anaconda3/envs/py39/lib/python3.9/site-packages/QuantLib-1.36-py3.9-macosx-10.15-x86_64.egg
>> Processing dependencies for QuantLib==1.36
>> Finished processing dependencies for QuantLib==1.36
>> 
>> Then trying to import QuantLib raises an error: 
>> 
>> (py39) matthew@Matthews-MacBook-Pro-5 Python % python
>> Python 3.9.20 (main, Oct  3 2024, 02:27:54)
>> [Clang 14.0.6 ] :: Anaconda, Inc. on darwin
>> Type "help", "copyright", "credits" or "license" for more information.
>> >>> import QuantLib as ql
>> Traceback (most recent call last):
>>   File "<stdin>", line 1, in <module>
>>   File "/Users/matthew/opt/anaconda3/envs/py39/lib/python3.9/site-packages/QuantLib-1.36-py3.9-macosx-10.15-x86_64.egg/QuantLib/__init__.py", line 19, in <module>
>>     from .QuantLib import *
>>   File "/Users/matthew/opt/anaconda3/envs/py39/lib/python3.9/site-packages/QuantLib-1.36-py3.9-macosx-10.15-x86_64.egg/QuantLib/QuantLib.py", line 10, in <module>
>>     from . import _QuantLib
>> ImportError: dlopen(/Users/matthew/opt/anaconda3/envs/py39/lib/python3.9/site-packages/QuantLib-1.36-py3.9-macosx-10.15-x86_64.egg/QuantLib/_QuantLib.abi3.so <http://quantlib.abi3.so/>, 0x0002): symbol not found in flat namespace ‘__ZN8QuantLib12SmileSection6updateEv'
>> 
>> Thanks for your help! 
>> 
>> Best
>> Matthew
>> 
>> 
>>> On Nov 4, 2024, at 4:38 AM, Luigi Ballabio <lui...@gm... <mailto:lui...@gm...>> wrote:
>>> 
>>> Hi Matthew,
>>>     I assume you've changed something in the library so you can't just use `pip install QuantLib`, correct?
>>> May you post the exact commands you're using to build the library and Python module? Thanks!
>>> 
>>> Luigi
>>> 
>>> 
>>> On Sun, Nov 3, 2024 at 2:30 AM Matthew Hancock <mat...@gm... <mailto:mat...@gm...>> wrote:
>>>> Hi QuantLib team, 
>>>> 
>>>> I am running into an issue building QuantLib-SWIG-1.36 on a Mac M1 running Mac OS 10.14. I am using an Anaconda version of Python 3.8. 
>>>> 
>>>> I can build QuantLib-1.36 with no issue (I added the --disabled-shared flag).
>>>> 
>>>> However, when I build QuantLib-SWIG-1.36 and try to import the Python library, I get an import error: 
>>>> 
>>>> >>> import QuantLib
>>>> Traceback (most recent call last):
>>>>   File "<stdin>", line 1, in <module>
>>>>   File "/Users/matthew/opt/anaconda3/lib/python3.8/site-packages/QuantLib-1.36-py3.8-macosx-10.9-x86_64.egg/QuantLib/__init__.py", line 19, in <module>
>>>>     from .QuantLib import *
>>>>   File "/Users/matthew/opt/anaconda3/lib/python3.8/site-packages/QuantLib-1.36-py3.8-macosx-10.9-x86_64.egg/QuantLib/QuantLib.py", line 10, in <module>
>>>>     from . import _QuantLib
>>>> ImportError: dlopen(/Users/matthew/opt/anaconda3/lib/python3.8/site-packages/QuantLib-1.36-py3.8-macosx-10.9-x86_64.egg/QuantLib/_QuantLib.abi3.so <http://quantlib.abi3.so/>, 0x0002): symbol not found in flat namespace '__ZN8QuantLib12SmileSection6updateEv'
>>>> 
>>>> Any help would be much appreciated, thanks! 
>>>> 
>>>> Best
>>>> Matthew
>>>> 
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>> 