The missing symbols you quoted come from python itself. It looks like you're missing a "-lpython" linker flag.
Regards, Nathan On Fri, Feb 19, 2021, 4:47 AM Roy de Bokx via Boost-users < boost-users@lists.boost.org> wrote: > > > Op wo 17 feb. 2021 om 20:30 schreef Anonymous Maarten < > anonymous.maar...@gmail.com>: > >> Thanks for your answer Maarten! >>> Please bare with me as I'm a little new to this. Is there some way I can >>> change the interpreter that is used for installing boost? Or do you think >>> that adapting the --prefix flag may also work? >>> >> >> When using the pre-built boost packages of a linux distribution (ubuntu), >> you're generally stuck with the versions/options that its packagers have >> chosen. >> A distribution freezes versions to make a more robust experience. >> >> Adding a `--prefix` will not help because, first of all, it's not a valid >> gcc option, and second, ubuntu 18.04 does not provide a >> libboost-python-py37 shared/static library. >> Do you really need python 3.7? Doesn't 3.6 suffice? >> > > Thanks! This helped me understanding the issue a bit further. I think 3.6 > should suffice indeed, so I tried using 3.6 by removing the 3.7 > installation from the Dockerfile and using the -lboost_numpy3 flag instead. > It seems I ran into some linking issue after this. It was able to find the > right numpy3.so and libboost_python3-py36.so, but I'm getting a lot of > errors like these: > > //usr/lib/x86_64-linux-gnu/libboost_numpy3.so: undefined reference to > `PyExc_ValueError' > > //usr/lib/x86_64-linux-gnu/libboost_python3-py36.so.1.65.1: undefined > reference to `PyLong_AsLong' > > //usr/lib/x86_64-linux-gnu/libboost_python3-py36.so.1.65.1: undefined > reference to `PyNumber_InPlaceFloorDivide' > > //usr/lib/x86_64-linux-gnu/libboost_python3-py36.so.1.65.1: undefined > reference to `PyBool_Type' > etc... > > I've pasted the full docker file and logs in > https://github.com/boostorg/boost/issues/462 > Thanks again for any help. > >> >> If you really want to use Boost.Python + python 3.7, you can do 2 things: >> - stay on ubuntu bionic and build boost yourself (or use an alternative >> c/c++ package manager, e.g. [conan](https://conan.io/) has a [boost >> package](https://conan.io/center/boost)) >> - more to a more recent ubuntu release. e.g. ubuntu 20.10 has python 3.8: >> https://packages.ubuntu.com/groovy/amd64/libboost-python1.71-dev/filelist >> > I've also given 20.10 a try, however I ran into the same linking issues as > mentioned above. > >> >> >> >> _______________________________________________ > Boost-users mailing list > Boost-users@lists.boost.org > https://lists.boost.org/mailman/listinfo.cgi/boost-users >
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