Pybind11: Can compile the Add example, but not the Pet Object Oriented example. I receive the dynamic module does not define module error.

[kevinj22]

Hello,

I realize this is the first point on the FAQ. I can compile, import, and execute the add example with no problems with the following command:

c++ -Wall -O3 -fPIC -shared -std=c++11 -I $HOME/anaconda3/include/python3.6m -I $HOME/anaconda3/include/python3.6m/pybind11 python3.6m-config --libs -L $HOME/anaconda3/lib example.cpp -o example.so

I explicitly link to the anaconda folder and the pybind11 folder in my anaconda directory for python 3.6.

When I use the same command to compile the Pet object oriented example:

c++ -Wall -O3 -fPIC -shared -std=c++11 -I $HOME/anaconda3/include/python3.6m -I $HOME/anaconda3/include/python3.6m/pybind11 python3.6m-config --libs -L $HOME/anaconda3/lib Pet.cpp -o Pet.so

I get the following error:

Python 3.6.4 |Anaconda custom (64-bit)| (default, Jan 16 2018, 18:10:19)
[GCC 7.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.

import Pet
Traceback (most recent call last):
File "", line 1, in
ImportError: dynamic module does not define module export function (PyInit_Pet)

Why does this happen for the object oriented example, but not the function?

#include <pybind11.h>
#include <string>

namespace py = pybind11;

class Pet
{
public:
        std::string name;
        Pet(const std::string &name) : name(name) { }
        void setName(const std::string &name_) { name = name_; }
        const std::string &getName() const { return name; }
};

PYBIND11_MODULE(example, m)
{
        py::class_<Pet>(m,"Pet")
                        .def(py::init<const std::string &>())
                        .def("setName", &Pet::setName)
                        .def("getName", &Pet::getName);
}

[jagerman]

PYBIND11_MODULE(example, m)

^ This should be PYBIND11_MODULE(Pet, m) for Pet.cpp/Pet.so.

[kevinj22]

That did the trick. Thanks!