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我正在尝试使用 pybind 创建虚拟类的 python 绑定。我一直在关注 pybind11 文档，这就是我所拥有的

测试场.h

class AbstractTestField
{
public:
    virtual ~AbstractTestField() = default;

    virtual double test() const = 0;
};

class TestField : public AbstractTestField
{
public:
    ~TestField() = default;

    double test() const final;
};
}  // namespace VNCS

测试场.cpp

double VNCS::TestField::test() const
{
    PYBIND11_OVERLOAD_PURE(double,          /* Return type */
                           VNCS::TestField, /* Parent class */
                           test             /* Name of function in C++ (must match Python name) */
    );
}

绑定.cpp

#include <pybind11/pybind11.h>
#include "TestField.h"

namespace py = pybind11;

PYBIND11_MODULE(VNCSSofaPlugin, m)
{
    m.doc() = "Test bindings";
    m.attr("__version__") = "dev";

    py::class_<AbstractTestField, TestField>(m, "TestField")
        .def(py::init<>())
        .def("test", &AbstractTestField::test);
}

我使用 CMake 作为我的构建系统，并创建了两个目标。一个用于 C++ 代码，一个用于绑定。

对于 C++ 我有这样的东西

set(SOURCES TestField.cpp)
set(PUBLIC_HEADERS TestField.h)
add_library(VNCSSofaPlugin SHARED ${SOURCES} ${HEADERS})
...

对于绑定我有这个

set(SOURCES bindings.cpp)
pybind11_add_module(VNCSSofaPluginBinding ${SOURCES})

target_link_libraries(VNCSSofaPluginBinding PUBLIC VNCSSofaPlugin)

这编译得很好，它会生成两个库：libVNCSSofaPlugin.so和VNCSSofaPluginBinding.cpython-38-x86_64-linux-gnu.so

但是，当我尝试在 python 中导入绑定时，出现以下问题

Python 3.8.6 (default, Sep 30 2020, 04:00:38)
[GCC 10.2.0] on linux
Type "help", "copyright", "credits" or "license" for more information.
>>> import VNCSSofaPluginBinding
Traceback (most recent call last):
  File "<stdin>", line 1, in <module>
ImportError: /mnt/D/jjcasmar/projects/VNCSSofaPlugin/build/Debug/lib/VNCSSofaPluginBinding.cpython-38-x86_64-linux-gnu.so: undefined symbol: _ZTIN4VNCS9TestFieldE

我不明白为什么找不到构造函数。我究竟做错了什么？

4

0 回答 0