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I get this error: undefined symbol: _ZN5boost6python15instance_holder8allocateEP7_objectmmm which is basically undefined symbol: boost::python::instance_holder::allocate::object

How to solve that?

I am following the example for Bond in python here

It mentions all the parts needed except compiling the example.cpp

This is the my command for compilation

g++ \
-I/home/myuser/source/adhoc_experiments/python_bond_poc/real_boost/boost_1_82_0/boost/ \
-I/home/myuser/.conda/envs/archexperiments/include/python3.9/ \
-I/usr/local/include/bond/ \
\
-L/home/myuser/.conda/envs/archexperiments/lib \
-L/usr/local/lib/bond \
\
example_types.cpp \
example_apply.cpp \
example.cpp \
\
-fPIC \
-shared \
\
-lpython3 \
-lpython3.9 \
-lboost_system \
-lboost_python39 \
-lboost_thread \
-lbond \
-lbond_apply \
\
-Wl,-soname,example  -export-dynamic \
-o example.so
Improve this question
11
  • Try moving the boost -l lines after -lbond lines. Commented Jun 13, 2023 at 11:53
  • Your boost source seems to live under your home, but where are the corresponding libraries? Commented Jun 13, 2023 at 12:03
  • @Quimby tried that, also played around with the linked libs order a lot and still no luck Commented Jun 13, 2023 at 12:32
  • @n.m. libs at /home/myuser/.conda/envs/archexperiments/lib Commented Jun 13, 2023 at 12:34
  • 1
    When you do ldd example.so, do you get a line with /home/myuser/.conda/envs/archexperiments/lib/libboost_python39.so.1.82.0 or similar? By the way your symbol is boost::python::instance_holder::allocate(_object*, unsigned long, unsigned long, unsigned long). Commented Jun 13, 2023 at 13:14
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