[BUG]: Link Error

[centorchen]

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Problem description

How to use my own link library in pybind11??

here is the example code:

test1.h int add(int a, int b);

test1.cpp

int add(int a, int b){
    return a+b;
}

test2.cpp

#include "test1.h"
#include <pybind11/pybind11.h>
namespace py = pybind11;
int add2(int a, int b){
    return add(a, b)+add(a,b);
}
PYBIND11_MODULE(example, m) {
    m.doc() = "test extra link";
    m.def("add2", &add2, "A function which adds two numbers");
}

firstly, I make test1 to a link library. Then, I use setup.py to make the module.

setup.py

from pybind11.setup_helpers import Pybind11Extension, build_ext
import setuptools
library_dirs = ["./"]
def get_extensions():
    ext_modules = [Pybind11Extension('example', 
        ['test2.cpp'], 
        extra_compile_args=['-Xlinker','-export-dynamic'],
        extra_link_args = ['-L{} -ltest1'.format(library_dirs[0])],
        cxx_std=11),]
    return ext_modules

setuptools.setup(
    name='example',
    ext_modules=get_extensions(),
    cmdclass={'build_ext': build_ext},
    classifiers=["Programming Language :: Python :: 3", "Operating System :: OS Independent"],
    packages=setuptools.find_packages(),
)

here is the Error:

when I ldd the .so get this:

It seems that didn't link the test1.so

Reproducible example code

No response

[Skylion007]

This is often because the version of Python that is running is not the version it was compiled against.

[centorchen]

This is often because the version of Python that is running is not the version it was compiled against.

If so, why I ldd the final .so can't find the libtest1.so?

[romankempt]

I had the same issue and forcing a reinstall of pybind11-global via conda-forge seems to have fixed it (conda install -c conda-forge pybind11-global). But I have a hard time reproducing the problem...