boost 1.67.0 with python 3.7.0: undefined reference to `PyUnicode_Type' in python/converter/builtin_converters.hpp:157

[ToonWeyens]

I built boost 1.67.0 using the commands

./bootstrap.sh --exec-prefix=install/ --with-libraries=graph,python,system,filesystem --libdir=install/lib/ --includedir=install/include

using, furthermore, python 3.7 (which I installed through pyenv using CONFIGURE_OPTS=--enable-shared pyenv install 3.7.0) through commands

import python ;
if ! [ python.configured ]
{
    using python : 3.7 : /home/toon/.pyenv/versions/3.7.0 : /home/toon/.pyenv/versions/3.7.0/include/python3.7m ;
}

inside the project-config.jam file.

Later, when I try to compile and llink my own C++ project in py_interface.cpp, I get the following error:
g++ -c -Wall -std=c++11 -g -rdynamic -fpic -c py_interface.cpp
g++ ESPPRC.o input.o py_interface.o -std=c++11 -g -rdynamic -L/home/toon/.pyenv/versions/3.7.0/lib -L/opt/boost_1_67_0/install/lib -lpython3 -lboost_graph -lboost_numpy37 -lboost_python37 -lboost_system -lboost_filesystem -Wl,--no-undefined -shared -o libESPPRC.so
py_interface.o: In function boost::python::to_python_value<char const* const&>::get_pytype() const': /opt/boost_1_67_0/install/include/boost/python/converter/builtin_converters.hpp:158: undefined reference to PyUnicode_Type'
py_interface.o: In function boost::python::api::object::object()': /opt/boost_1_67_0/install/include/boost/python/object_core.hpp:400: undefined reference to _Py_NoneStruct'
collect2: error: ld returned 1 exit status

The boost libraries are:

lib/libboost_filesystem.so.1.67.0
lib/libboost_graph.so.1.67.0
lib/libboost_numpy37.so.1.67.0
lib/libboost_python37.so.1.67.0
lib/libboost_regex.so.1.67.0
lib/libboost_system.so.1.67.0

I read somewhere that the problem might be cause by different versions of python, but to the best of my ability, I checked this and I don't think so.

I used the following export in my makefile, by the way:

export CPLUS_INCLUDE_PATH=[HOME]/.pyenv/versions/3.7.0/include/python3.7m/:/[BOOST DIR]/install/include

Also, I looked for PyUnicode_Type, and found it defined in unicodeobject.h in the python 3.7.0 include directory. Even when I manually include this file in builtin_converters.hpp, right before where the error happens, it still doesn't work...

Could anyone point me in the right direction? I appreciate all help!

[ToonWeyens]

Okay it looks like you have to import the --with-pymalloc version:

-lpython3.7m -lboost_graph -lboost_numpy37 -lboost_python37 -lboost_system -lboost_filesystem 

instead of

-lpython3 -lboost_graph -lboost_numpy37 -lboost_python37 -lboost_system -lboost_filesystem 

It looks like things are working better now but I'll need some more to test.